Transparent resin substrate

Abstract

A transparent resin substrate composed of a light-transmitting resin base sheet, and an underlying layer, a hard coat layer, and an antireflection coating formed sequentially on the base sheet. The antireflection coating includes a medium refractive index layer on the hard coat layer, and a low refractive index layer on the medium refractive index layer. The underlying layer is a cured product of a hexa- or higher functional urethane acrylate monomer. The hard coat layer is a cured product of a hard coat layer composition containing a polymerizable monomer containing 50% by mass or more of a tri- or lower functional urethane acrylate monomer, silica particles, a silane coupling agent, and a metal chelate compound. The medium refractive index layer is a cured product of a medium refractive index layer composition. The low refractive index layer is a particle-free cured product of a low refractive index layer composition.

Claims

1. A transparent resin substrate composed of a light-transmitting resin base sheet, an underlying layer formed on the base sheet, a hard coat layer formed on the underlying layer, and an antireflection coating formed on the hard coat layer, wherein the antireflection coating comprises a medium refractive index layer and a low refractive index layer formed on the field-of view side of the medium refractive index layer, the underlying layer is composed of a cured product obtained by curing (A1) a hexa- or higher functional urethane acrylate monomer, the hard coat layer is composed of a cured product formed by curing a hard coat layer composition which contains (A) a polymerizable monomer containing 50% by mass or more of (A2) a tri- or lower functional urethane acrylate monomer, (B) silica particles, (C) a silane coupling agent, and (D) a metal chelate compound, the medium refractive index layer is composed of a cured product formed by curing a medium refractive index layer composition which contains (E) an organic-inorganic composite compound, (F) metal oxide particles, (C) a silane coupling agent, and (D) a metal chelate compound, and the low refractive index layer is composed of a particle-free cured product formed by curing a low refractive index layer composition which contains (G) a silicon compound represented by the following general formula
R.sub.n—Si(OR).sub.4-n where R is an alkyl group or an alkenyl group, and n is a number 1 or 2, (C) a silane coupling agent, and (D) a metal chelate compound.

2. The transparent resin substrate according to claim 1, wherein the antireflection coating has a high refractive index layer between the medium refractive index layer and the low refractive index layer, and the high refractive index layer is composed of a cured product formed by curing a high refractive index layer composition which contains (F) metal oxide particles, (C) a silane coupling agent, and (D) a metal chelate compound.

3. The transparent resin substrate according to claim 1, wherein the hard coat layer composition contains 10 to 70 parts by mass of the silica particles (B), 1 to 10 parts by mass of the silane coupling agent (C), and 0.1 to 1.5 parts by mass of the metal chelate compound (D), based on 100 parts by mass of the polymerizable monomer (A), the medium refractive index layer composition contains 1 to 200 parts by mass of the metal oxide particles (F), 10 to 400 parts by mass of the silane coupling agent (C), and 0.1 to 15 parts by mass of the metal chelate compound (D), based on 100 parts by mass of the organic-inorganic composite compound (E), and the low refractive index layer composition contains 10 to 400 parts by mass of the silane coupling agent (C), and 1 to 20 parts by mass of the metal chelate compound (D), based on 100 parts by mass of the silicon compound (G).

4. The transparent resin substrate according to claim 1, wherein a thickness of the light-transmitting resin base sheet is 30 to 1000 μm, a thickness of the underlying layer is 0.05 to 0.15 μm, a thickness of the hard coat layer is 1 to 5 μm, a thickness of the medium refractive index layer is 0.05 to 0.15 μm, and a thickness of the low refractive index layer is 0.05 to 0.15 μm.

5. The transparent resin substrate according to claim 1, wherein a refractive index of the medium refractive index layer is 1.51 to 1.75, and a refractive index of the low refractive index layer is 1.40 to 1.50.

6. The transparent resin substrate according to claim 1, wherein the light-transmitting resin base sheet is a base sheet selected from a polycarbonate resin sheet, an acrylate resin sheet, and a sheet being a laminate of a polycarbonate resin and an acrylate resin.

7. The transparent resin substrate according to claim 1, wherein an elongation rate of the transparent resin substrate is 120 to 160%.

8. The transparent resin substrate according to claim 1, wherein the organic-inorganic composite compound (E) is a composite compound having a structure in which an alkoxysilyl group is bound to a bisphenol A epoxy compound, a novolak phenol compound, or a polyamic acid compound.

9. An antireflection film for film insert molding which is composed of the transparent resin substrate according to claim 1.

Description

EXAMPLES

(1) The present invention will now be described concretely by reference to Examples, but is in no way limited thereby. Not all of combinations of the characteristic features explained in the Examples are essential to the means for solving the problems that the present invention tackles.

(2) Various components and abbreviations used in the following Examples and Comparative Examples, and testing methods therein will be described below.

(3) (A) Polymerizable Monomer

(4) (A1) Hexa- or higher functional urethane acrylate monomer:

(5) A1-6: Urethane acrylate prepolymer having six terminal acrylate groups

(6) (A2) Tri- or lower functional urethane acrylate monomer:

(7) A2-3: Urethane acrylate monomer having three terminal acrylate groups

(8) (A3) Tetra- or higher functional urethane acrylate monomer:

(9) A1-6: Same as the above monomer.

(10) (B) Silica Particles

(11) Spherical silica: Average particle size=10 nm, refractive index=1.46 IPA dispersion medium (solid content: 20% by mass)
(C) Silane Coupling Agent

(12) γ-GPS: γ-glycidoxypropyltrimethoxysilane

(13) 3-GPDS: 3-glycidoxypropylmethyldimethoxysilane

(14) (D) Metal Chelate Compound

(15) AlTA: Aluminum trisacetylacetonate

(16) (E) Organic-Inorganic Composite Compound

(17) ASE: Trialkoxymethylsilyl group-modified bisphenol A type epoxy compound (alkoxy group-containing silane-modified epoxy compound)

(18) (F) Metal Oxide Particles

(19) ZrO.sub.2: Average particle size=50 nm, refractive index=2.40 PGM dispersion medium (solid content: 55% by mass)
(G) Silicon Compound

(20) MTES: Methyltriethoxysilane

(21) (H) Others

(22) Transparent resin base sheet PC: Polycarbonate resin (thickness 300 μm, Tg=140° C.) Total light transmittance=90%

(23) Organic solvents IPA: Isopropyl alcohol MIBK: Methyl isobutyl ketone SBAC: Acetic acid sec-butyl ester PGM: 1-methoxy-2-propanol

(24) Hydrolysis catalyst HCl: 0.05 N aqueous solution of hydrochloric acid

(25) Polymerization initiator APPI: Alkylphenone-based photopolymerization initiator

(26) Ultraviolet absorber UV1: Benzotriazole type ultraviolet absorber
(1) Elongation Rate

(27) The substrate was heated for about 30 seconds at the softening temperature (140° C.) of the base sheet, and bent using a 90° bending jig with varying R. Based on the R value of the bending tool at which no cracking occurred, the elongated length (circumference) of the exterior of the substrate was calculated (¼×πR because of 90°). It was assumed that the interior of the substrate was only bent, and was not elongated. On this assumption, the thickness of the substrate was subtracted from the elongated length of the exterior, and the value calculated by this subtraction was taken as the circumference of the interior {¼×π(R−thickness of transparent resin substrate)}. The ratio of the circumference of the elongated exterior to the circumference of the interior as 100 was calculated, and the so obtained value was used as the elongation rate.

(28) (2) Total Light Transmittance

(29) A maximum transmittance value at a wavelength of 780 to 380 nm was measured at a scanning speed of 1000 nm/min using JASCO Corporation's V-550 coupled with an integrating sphere. This value was taken as total light transmittance.

(30) (3) Reflectance

(31) Reflectance at the lowest point (surface of transparent resin laminate) was measured using the same tester as for the total light transmittance under the same conditions as for the total light transmittance. The lower its value is, the better antireflective capability is shown.

(32) (4) Hardness

(33) Hardness was measured on a pencil (Uni, produced by Mitsubishi Pencil Co., Ltd.) by means of YOSHIMITSU SEIKI's hardness meter C-2210. The hardness is expressed as pencil hardness. The higher this hardness, the more satisfactory abrasion resistance is.

(34) (5) Abrasion Resistance

(35) A standard adjacent cotton fabric for testing (Calico No. 3, produced by Japanese Standards Association) was reciprocated on the surface of a specimen 3,000 times at a pressure of 500 g/cm.sup.2. Whether or not scuffs were caused by the reciprocations was visually determined to evaluate abrasion resistance. The evaluation criteria are offered below. In the present test, transmitted light refers to light transmitted through the transparent resin substrate, while reflected light refers to light reflected by the surface of the transparent resin substrate.

(36) ⊚: No scuffs were seen upon observation of both transmitted light and reflected light.

(37) ◯: Several scuffs were seen upon observation of transmitted light, but no scuffs were seen in the case of reflected light.

(38) Δ: Several scuffs were seen upon observation of both transmitted light and reflected light.

(39) X: Ten or more scuffs were seen upon observation of both transmitted light and reflected light.

(40) (6) Thermal Shapability

(41) Whether or not cracking occurred during thermal shaping upon heating for 60 seconds at 115° C. before molding was observed.

(42) ◯: Thermal shaping was possible without cracking.

(43) X: Cracking occurred.

Example 1

(44) PC (thickness 300 μm) was used as a transparent resin base sheet, and the surface of the sheet was coated with an underlying layer composition of a formulation indicated below by dip coating. Then, the coated composition was irradiated with ultraviolet rays for 1 minute from a high pressure mercury lamp heated at 60° C. for 5 minutes. As a result, a 0.1 μm underlying layer was formed on the surface of the base sheet.

(45) Underlying layer composition: The composition ratio based on 100 parts by mass of the polymerizable monomer (A) was shown in parentheses.

(46) TABLE-US-00001 (A1): A1-6 20.00 g (100) Photopolymerization initiator: APPI  0.5 g (2) Organic solvent: IPA 784 g/ SBAC 196 g

(47) Then, the surface of the underlying layer was coated with a hard coat layer composition of a formulation indicated below by dip coating. Then, the coated composition was irradiated with ultraviolet rays for 1 minute from a high pressure mercury lamp heated at 60° C. for 5 minutes. As a result, a 1.5 μm hard coat layer was formed on the surface of the underlying layer.

(48) Hard coat layer composition: The composition ratio based on 100 parts by mass of the polymerizable monomer (A1+A2) was shown in parentheses.

(49) TABLE-US-00002 (A1): A1-6 29.0 g (20) (A2): A2-3 118.0 g (80) (B): Spherical silica 63.0 g (43) (C): γ-GPS 10.5 g (7) (D): AlTA 1.0 g (0.7) Photopolymerization initiator: APPI 11.0 g (7) Hydrolysis catalyst: HCl 2.0 g Ultraviolet absorber: UV1 10.0 g (7) Organic solvent: IPA 453 g/MIBK 302 g

(50) Then, the surface of the hard coat layer was coated with a medium refractive index layer composition of a formulation indicated below by dip coating. Then, the coated composition was heated at 80° C. for 20 minutes. As a result, a medium refractive index layer having a refractive index of 1.58 and a thickness of 0.1 μm was formed on the surface of the hard coat layer.

(51) Medium refractive index layer composition: The composition ratio based on 100 parts by mass of the organic-inorganic composite compound (ASE) was shown in parentheses.

(52) TABLE-US-00003 (E): ASE 19.0 g (100) (F): ZrO.sub.2 10.0 g (50) (C): γ-GPS 19.0 g (100) (D): AlTA  0.6 g (3) Hydrolysis catalyst: HCl  7.0 g Organic solvent: PGM 8.0 g/IPA 281 g/ SBAC 655 g

(53) Then, the surface of the medium refractive index layer was coated with a low refractive index layer composition of a formulation indicated below by dip coating. Then, the coated composition was heated at 80° C. for 20 minutes. As a result, a low refractive index layer having a refractive index of 1.47 and a thickness of 0.1 μm was formed on the surface of the medium refractive index layer.

(54) Low refractive index layer composition: The composition ratio based on 100 parts by mass of the silicon compound (MTES) was shown in parentheses.

(55) TABLE-US-00004 (G): MTES 13.0 g (100) (C): γ-GPS  9.0 g (67) (D): AlTA  0.9 g (7) Hydrolysis catalyst: HCl  4.0 g Organic solvent: IPA  973 g

(56) In connection with the resulting transparent resin substrate, the elongation rate, total light transmittance, refractive index, hardness, abrasion resistance, and thermal shapability were evaluated in accordance with the above-described testing methods The results are shown in Table 8. The components of the compositions used in the formation of the respective layers, their amounts incorporated, the film thicknesses, and the refractive indexes of the layers are summarized in Table 1.

Examples 2 to 17

(57) The transparent resin substrates were prepared in the same manner as in Example 1, except that the formulations of the underlying layer composition, the hard coat layer composition, the medium refractive index layer composition, and the low refractive index layer composition were changed to compositions as shown in Tables 1 to 6. The results are shown in Table 8.

(58) TABLE-US-00005 TABLE 1 Example 1 Example 2 Example 3 Base sheet PC PC PC Low refractive index layer (n1) *1 *2 *1 *2 *1 *2 Silicon compound MTES 13.0 100 18.0 100 20.0 100 Silane coupling agent γ-GPS 9.0 67 4.0 25 2.0 11 Metal chelate compound AlTA 0.9 7 0.4 2 0.2 1 Hydrolysis catalyst HCl 4.0 6.0 6.0 Organic solvent IPA 973 971 972 Total 1000 174 1000 127 1000 112 Refractive index 1.47 1.45 1.44 Film thickness [μm] 0.1 0.1 0.1 Medium refractive index layer (n3) *1 *2 *1 *2 *1 *2 Metal oxide particles ZrO.sub.2 10.0 50 2.0 11 0.5 2 Silane coupling agent γ-GPS 19.0 100 23.0 100 24.0 100 Organic-inorganic composite compound ASE 19.0 100 23.0 100 24.0 100 Metal chelate compound AlTA 0.6 3 0.8 3 0.8 4 Hydrolysis catalyst HCl 7.0 8.0 8.0 Organic solvent PGM 8.0 2.0 0.4 Organic solvent IPA 281 283 283 Organic solvent SBAC 655 658 659 Total 1000 253 1000 214 1000 206 Refractive index 1.58 1.52 1.51 Film thickness [μm] 0.1 0.1 0.1 Hard coat layer *1 *2 *1 *2 *1 *2 Polymerizable monomer A1-6 29.0 20 15.0 10 7.0 5 Polymerizable monomer A2-3 118.0 80 132.0 90 140.0 95 Total 100 100 100 Silica particles spherical silica 63.0 43 63.0 43 63.0 43 Silane coupling agent γ-GPS 11.0 7 11.0 7 11.0 7 Metal chelate compound AlTA 1.0 0.7 1.0 0.7 1.0 0.7 Polymerization initiator APPI 11.0 7 11.0 7 11.0 7 Ultraviolet absorber UV1 10.0 7 10.0 7 10.0 7 Hydrolysis catalyst HCl 2.0 2.0 2.0 Organic solvent IPA 453 453 453 Organic solvent MIBK 302 302 302 Total 1000 165 1000 165 1000 165 Film thickness [μm] 1.5 1.5 1.5 Underlying layer *1 *2 *1 *2 *1 *2 Polymerizable monomer A1-6 20.0 100 20.0 100 20.0 100 Polymerization initiator APPI 0.5 2 0.5 2 0.5 2 Organic solvent IPA 784 784 784 Organic solvent SBAC 196 196 196 Total 1000 102 1000 102 1000 102 Film thickness [μm] 0.1 0.1 0.1 *1: Amount incorporated [g], *2: Solid content ratio [parts by mass]

(59) TABLE-US-00006 TABLE 2 Example 4 Example 5 Example 6 Base sheet PC PC PC Low refractive index layer (n1) *1 *2 *1 *2 *1 *2 Silicon compound MTES 4.0 100 18.0 100 18.0 100 Silane coupling agent γ-GPS 18.0 400 4.0 25 4.0 25 Metal chelate compound AlTA 0.7 16 0.4 2 0.4 2 Hydrolysis catalyst HCl 6.0 6.0 6.0 Organic solvent IPA 971 971 971 Total 1000 516 1000 127 1000 127 Refractive index 1.50 1.45 1.45 Film thickness [μm] 0.1 0.1 0.1 Medium refractive index layer (n3) *1 *2 *1 *2 *1 *2 Metal oxide particles ZrO.sub.2 14.0 86 0.5 5 0.5 1 Silane coupling agent γ-GPS 17.0 100 38.0 395 5.0 11 Organic-inorganic composite compound ASE 17.0 100 10.0 100 43.0 100 Metal chelate compound AlTA 0.6 4 1.0 13 0.2 0.4 Hydrolysis catalyst HCl 5.0 12.0 2.0 Organic solvent PGM 12.0 0.4 0.4 Organic solvent IPA 280 282 285 Organic solvent SBAC 654 656 664 Total 1000 290 1000 513 1000 113 Refractive index 1.61 1.51 1.51 Film thickness [μm] 0.1 0.1 0.1 Hard coat layer *1 *2 *1 *2 *1 *2 Polymerizable monomer A1-6 44.0 30 30.0 20 15.0 10 Polymerizable monomer A2-3 103.0 70 118.0 80 132.0 90 Total 100 100 100 Silica particles spherical silica 63.0 43 63.0 43 63.0 43 Silane coupling agent γ-GPS 11.0 7 11.0 7 11.0 7 Metal chelate compound AlTA 1.0 0.7 1.0 0.7 1.0 0.7 Polymerization initiator APPI 11.0 7 11.0 7 11.0 7 Ultraviolet absorber UV1 10.0 7 10.0 7 10.0 7 Hydrolysis catalyst HCl 2.0 2.0 2.0 Organic solvent IPA 453 452 453 Organic solvent MIBK 302 302 302 Total 1000 165 1000 165 1000 165 Film thickness [μm] 1.5 1.5 1.5 Underlying layer *1 *2 *1 *2 *1 *2 Polymerizable monomer A1-6 20.0 100 20.0 100 20.0 100 Polymerization initiator APPI 0.5 2 0.5 2 0.5 2 Organic solvent IPA 784 784 784 Organic solvent SBAC 196 196 196 Total 1000 102 1000 102 1000 102 Film thickness [μm] 0.1 0.1 0.1 *1: Amount incorporated [g], *2: Solid content ratio [parts by mass]

(60) TABLE-US-00007 TABLE 3 Example 7 Example 8 Example 9 Base sheet PC PC PC Low refractive index layer (n1) *1 *2 *1 *2 *1 *2 Silicon compound MTES 13.0 100 13.0 100 18.0 100 Silane coupling agent γ-GPS 9.0 67 9.0 67 4.0 25 Metal chelate compound AlTA 0.9 7 0.9 7 0.4 2 Hydrolysis catalyst HCl 4.0 4.0 6.0 Organic solvent IPA 973 973 971 Total 1000 174 1000 174 1000 127 Refractive index 1.47 1.47 1.45 Film thickness [μm] 0.1 0.1 0.1 Medium refractive index layer (n3) *1 *2 *1 *2 *1 *2 Metal oxide particles ZrO.sub.2 19.0 80 19.0 200 2.0 11 Silane coupling agent γ-GPS 5.0 20 19.0 200 23.0 100 Organic-inorganic composite compound ASE 24.0 100 10.0 100 23.0 100 Metal chelate compound AlTA 0.2 0.7 0.6 7 0.8 3 Hydrolysis catalyst HCl 2.0 8.0 8.0 Organic solvent PGM 16.0 16.0 2.0 Organic solvent IPA 280 278 283 Organic solvent SBAC 654 649 658 Total 1000 201 1000 507 1000 214 Refractive index 1.64 1.64 1.52 Film thickness [μm] 0.1 0.1 0.1 Hard coat layer *1 *2 *1 *2 *1 *2 Polymerizable monomer A1-6 29.0 20 15.0 10 0.0 0 Polymerizable monomer A2-3 118.0 80 132.0 90 147.0 100 Total 100 100 100 Silica particles spherical silica 63.0 43 63.0 43 63.0 43 Silane coupling agent γ-GPS 11.0 7 11.0 7 11.0 7 Metal chelate compound AlTA 1.0 0.7 1.0 0.7 1.0 0.7 Polymerization initiator APPI 11.0 7 11.0 7 11.0 7 Ultraviolet absorber UV1 10.0 7 10.0 7 10.0 7 Hydrolysis catalyst HCl 2.0 2.4 2.4 Organic solvent IPA 453 453 453 Organic solvent MIBK 302 302 302 Total 1000 165 1000 165 1000 165 Film thickness [μm] 1.5 1.5 1.5 Underlying layer *1 *2 *1 *2 *1 *2 Polymerizable monomer A1-6 20.0 100 20.0 100 20.0 100 Polymerization initiator APPI 0.5 2 0.5 2 0.5 2 Organic solvent IPA 784 784 784 Organic solvent SBAC 196 196 196 Total 1000 102 1000 102 1000 102 Film thickness [μm] 0.1 0.1 0.1 *1: Amount incorporated [g], *2: Solid content ratio [parts by mass]

(61) TABLE-US-00008 TABLE 4 Example 10 Example 11 Example 12 Base sheet PC PC PC Low refractive index layer (n1) *1 *2 *1 *2 *1 *2 Silicon compound MTES 13.0 100 13.0 100 18.0 100 Silane coupling agent γ-GPS 9.0 67 9.0 67 4.0 25 Metal chelate compound AlTA 0.9 7 0.9 7 0.4 2 Hydrolysis catalyst HCl 4.0 4.0 6.0 Organic solvent IPA 973 973 971 Total 1000 174 1000 174 1000 127 Refractive index 1.47 1.47 1.45 Film thickness [μm] 0.1 0.1 0.1 Medium refractive index layer (n3) *1 *2 *1 *2 *1 *2 Metal oxide particles ZrO.sub.2 10.0 50 10.0 50 2.0 11 Silane coupling agent γ-GPS 19.0 100 19.0 100 23.0 100 Organic-inorganic composite compound ASE 19.0 100 19.0 100 23.0 100 Metal chelate compound AlTA 0.7 4 0.7 4 0.7 3 Hydrolysis catalyst HCl 8.0 8.0 8.0 Organic solvent PGM 8.0 8.0 2.0 Organic solvent IPA 281 281 283 Organic solvent SBAC 654 654 658 Total 1000 254 1000 254 1000 214 Refractive index 1.58 1.58 1.52 Film thickness [μm] 0.1 0.1 0.1 Hard coat layer *1 *2 *1 *2 *1 *2 Polymerizable monomer A1-6 59.0 50 19.0 10 13.0 10 Polymerizable monomer A2-3 88.0 50 170.0 90 113.0 90 Total 100 100 100 Silica particles spherical silica 63.0 43 21.0 11 84.0 67 Silane coupling agent γ-GPS 11.0 7 11.0 6 11.0 8 Metal chelate compound AlTA 1.0 0.7 1.0 0.6 1.0 0.8 Polymerization initiator APPI 11.0 7.1 11.0 6 11.0 8 Ultraviolet absorber UV1 10.0 7.0 13.0 7 9.00 7 Hydrolysis catalyst HCl 2.0 2.4 2.4 Organic solvent IPA 453 451 454 Organic solvent MIBK 302 301 302 Total 1000 165 1000 130 1000 191 Film thickness [μm] 1.5 1.5 1.5 Underlying layer *1 *2 *1 *2 *1 *2 Polymerizable monomer A1-6 20.0 100 20.0 100 20.0 100 Polymerization initiator APPI 0.5 2 0.5 2 0.5 2 Organic solvent IPA 784 784 784 Organic solvent SBAC 196 196 196 Total 1000 102 1000 102 1000 102 Film thickness [μm] 0.1 0.1 0.1 *1: Amount incorporated [g], *2: Solid content ratio [parts by mass]

(62) TABLE-US-00009 TABLE 5 Example 13 Example 14 Example 15 Base sheet PC PC PC Low refractive index layer (n1) *1 *2 *1 *2 *1 *2 Silicon compound MTES 13.0 100 13.0 100 13.0 100 Silane coupling agent γ-GPS 9.0 67 9.0 67 9.0 67 Metal chelate compound AlTA 0.9 7 0.9 7 0.9 7 Hydrolysis catalyst HCl 4.0 4.0 4.0 Organic solvent IPA 973 973 973 Total 1000 174 1000 174 1000 174 Refractive index 1.47 1.47 1.47 Film thickness [μm] 0.1 0.1 0.1 Medium refractive index layer (n3) *1 *2 *1 *2 *1 *2 Metal oxide particles ZrO.sub.2 10.0 50 10.0 50 10.0 50 Silane coupling agent γ-GPS 19.0 100 19.0 100 19.0 100 Organic-inorganic composite compound ASE 19.0 100 19.0 100 19.0 100 Metal chelate compound AlTA 0.7 4 0.7 4 0.7 4 Hydrolysis catalyst HCl 8.0 8.0 8.0 Organic solvent PGM 8.0 8.0 8.0 Organic solvent IPA 281 281 281 Organic solvent SBAC 654 654 654 Total 1000 254 1000 254 1000 254 Refractive index 1.58 1.58 1.58 Film thickness [μm] 0.1 0.1 0.1 Hard coat layer *1 *2 *1 *2 *1 *2 Polymerizable monomer A1-6 15.0 10 15.0 10 15.0 10 Polymerizable monomer A2-3 132.0 90 132.0 90 132.0 90 Total 100 100 100 Silica particles spherical silica 63.0 43 63.0 43 63.0 43 Silane coupling agent γ-GPS 2.0 1 21 14 11.0 7 Metal chelate compound AlTA 0.2 0.1 2.0 1.4 1.0 0.7 Polymerization initiator APPI 11.0 7 11.0 7 11.0 7 Ultraviolet absorber UV1 10.0 7 10.0 7 10.0 7 Hydrolysis catalyst HCl 0.5 5.0 2.0 Organic solvent IPA 460 445 453 Organic solvent MIBK 306 296 302 Total 1000 159 1000 172 1000 165 Film thickness [μm] 1.5 1.5 1.0 Underlying layer *1 *2 *1 *2 *1 *2 Polymerizable monomer A1-6 20.0 100 20.0 100 20.0 100 Polymerization initiator APPI 0.5 2 0.5 2 0.5 2 Organic solvent IPA 784 784 784 Organic solvent SBAC 196 196 196 Total 1000 102 1000 102 1000 102 Film thickness [μm] 0.1 0.1 0.1 *1: Amount incorporated [g], *2: Solid content ratio [parts by mass]

(63) TABLE-US-00010 TABLE 6 Example 16 Example 17 Base sheet PC PC Low refractive index layer (n1) *1 *2 *1 *2 Silicon compound MTES 13.0 100 13.0 100 Silane coupling agent γ-GPS 9.0 67 9.0 67 Metal chelate compound AlTA 0.9 7 0.9 7 Hydrolysis catalyst HCl 4.0 4.0 Organic solvent IPA 973 973 Total 1000 174 1000 174 Refractive index 1.47 1.47 Film thickness [μm] 0.1 0.1 Medium refractive index layer (n3) *1 *2 *1 *2 Metal oxide particles ZrO.sub.2 10.0 50 10.0 50 Silane coupling agent γ-GPS 19.0 100 19.0 100 Organic-inorganic composite compound ASE 19.0 100 19.0 100 Metal chelate compound AlTA 0.7 4 0.7 4 Hydrolysis catalyst HCl 8.0 8.0 Organic solvent PGM 8.0 8.0 Organic solvent IPA 281 281 Organic solvent SBAC 654 654 Total 1000 254 1000 254 Refractive index 1.58 1.58 Film thickness [μm] 0.1 0.1 Hard coat layer *1 *2 *1 *2 Polymerizable monomer A1-6 15.0 10 15.0 10 Polymerizable monomer A2-3 132.0 90 132.0 90 Total 100 100 Silica particles spherical silica 63.0 43 63.0 43 Silane coupling agent γ-GPS 11.0 7 11.0 7 Metal chelate compound AlTA 1.0 0.7 1.0 0.7 Polymerization initiator APPI 11.0 7 11.0 7 Ultraviolet absorber UV1 10.0 7 10.0 7 Hydrolysis catalyst HCl 2.0 2.0 Organic solvent IPA 453 453 Organic solvent MIBK 302 302 Total 1000 165 1000 165 Film thickness [μm] 3.0 5.0 Underlying layer *1 *2 *1 *2 Polymerizable monomer A1-6 20.0 100 20.0 100 Polymerization initiator APPI 0.5 2 0.5 2 Organic solvent IPA 784 784 Organic solvent SBAC 196 196 Total 1000 102 1000 102 Film thickness [μm] 0.1 0.1 *1: Amount incorporated [g], *2: Solid content ratio [parts by mass]

Example 18

(64) The formulations of the underlying layer composition, the hard coat layer composition, the medium refractive index layer composition, and the low refractive index layer composition were changed to compositions as shown in Table 7. Moreover, a high refractive index layer having a refractive index of 1.70 and a thickness of 0.1 μm was provided between the medium refractive index layer and the low refractive index layer, with its formulation being as shown in Table 7. Except for these conditions, a transparent resin substrate was prepared in the same manner as in Example 1. The results are shown in Table 8.

(65) TABLE-US-00011 TABLE 7 Example 18 Base sheet PC Low refractive index layer (n1) *1 *2 Silicon compound MTES 18.0 100 Silane coupling agent γ-GPS 4.0 67 Metal chelate compound AlTA 0.4 7 Hydrolysis catalyst HCl 6.0 Organic solvent IPA 971 Total 1000 174 Refractive index 1.45 Film thickness [μm] 0.1 High refractive index layer (n2) *1 *2 Metal oxide particles ZrO.sub.2 particles 19.0 100 Silane coupling agent 3-GPDS 15.0 82 Metal chelate compound AITA 1.0 6 Hydrolysis catalyst HCl 4.0 Organic solvent PGM 15.0 Organic solvent IPA 284 Organic solvent SBAC 662 Total 1000 188 Refractive index 1.70 Film thickness [μm] 0.1 Medium refractive index layer (n3) *1 *2 Metal oxide particles ZrO.sub.2 particles 2.0 11 Silane coupling agent γ-GPS 23.0 100 Organic-inorganic ASE 23.0 100 composite compound Metal chelate compound AlTA 0.8 3 Hydrolysis catalyst HCl 8.0 Organic solvent PGM 2.0 Organic solvent IPA 282 Organic solvent SBAC 659 Total 1000 214 Refractive index 1.52 Film thickness [μm] 0.1 Hard coat layer *1 *2 Polymerizable monomer A1-6 15.0 10 Polymerizable monomer A2-3 132.0 90 Total 100 Silica particles spherical silica 63.0 43 Silane coupling agent γ-GPS 2.0 1 Metal chelate compound AlTA 0.2 0.1 Polymerization initiator APPI 11.0 7 Ultraviolet absorber UV1 10.0 7 Hydrolysis catalyst HCl 0.5 Organic solvent IPA 460 Organic solvent MIBK 306 Total 1000 106 Film thickness [μm] 1.5 Underlying layer *1 *2 Polymerizable monomer A1-6 20.0 100 Polymerization initiator APPI 0.5 2 Organic solvent IPA 784 Organic solvent SBAC 196 Total 1000 102 Film thickness [μm] 0.1 *1: Amount incorporated [g] *2: Solid content ratio [parts by mass]

(66) TABLE-US-00012 TABLE 8 Ex. 1 Ex. 2 Ex. 3 Ex. 4 Ex. 5 Ex. 6 Elongation rate  140%  150%  155%  130%  140%  150% Total light transmittance 97.10%  95.80%  95.80%  96.70%  95.40%  95.40%  Refractive index 2.90% 4.20% 4.20% 3.30% 4.60% 4.60% Hardness 2B 2B 2B 2B 2B 2B Abrasion resistance ◯ ◯ Δ ⊚ ◯ ◯ Thermal shapability ◯ ◯ ◯ ◯ ◯ ◯ Ex. 7 Ex. 8 Ex. 9 Ex. 10 Ex. 11 Ex. 12 Elongation rate  140%  150%  160%  120%  150%  145% Total light transmittance 98.60%  98.60%  95.80%  97.10%  97.10%  95.80%  Refractive index 1.40% 1.40% 4.20% 2.90% 2.90% 4.20% Hardness 2B 2B 2B 2B 2B 2B Abrasion resistance ◯ ◯ ◯ ◯ ◯ ◯ Thermal shapability ◯ ◯ ◯ ◯ ◯ ◯ Ex. 13 Ex. 14 Ex. 15 Ex. 16 Ex. 17 Ex. 18 Elongation rate  150%  150%  150%  135%  120%  150% Total light transmittance 97.10%  97.10%  97.10%  97.10%  97.10%  99.00%  Refractive index 2.90% 2.90% 2.90% 2.90% 2.90% 1.00% Hardness 2B 2B 2B 2B B 2B Abrasion resistance ◯ ◯ Δ ◯ ◯ ◯ Thermal shapability ◯ ◯ ◯ ◯ ◯ ◯

Comparative Examples 1 to 12

(67) Transparent resin substrates were prepared in the same manner as in Example 1, except that the formulations of the underlying layer composition, the hard coat layer composition, the medium refractive index layer composition, and the low refractive index layer composition were changed to compositions as shown in Tables 9 to 12. The results are shown in Table 13.

(68) TABLE-US-00013 TABLE 9 Comp. Ex. 1 Comp. Ex. 2 Comp. Ex. 3 Base sheet PC PC PC Low refractive index layer (n1) *1 *2 *1 *2 *1 *2 Silicon compound MTES 21.0 100 3.0 100 13.0 100 Silane coupling agent γ-GPS 1.0 5 19.0 566 9.0 67 Metal chelate compound AlTA 0.7 3 0.7 21 0.7 7 Hydrolysis catalyst HCl 6.0 6.0 6.0 Organic solvent IPA 971 971 971 Total 1000 108 1000 687 1000 174 Refractive index 1.44 1.51 1.47 Film thickness [μm] 0.1 0.1 0.1 Medium refractive index layer (n3) *1 *2 *1 *2 *1 *2 Metal oxide particles ZrO.sub.2 0.5 2 14.0 86 34.0 350 Silane coupling agent γ-GPS 24.0 100 17.0 100 5.0 50 Organic-inorganic composite compound ASE 24.0 100 17.0 100 10.0 100 Metal chelate compound AlTA 0.8 4 0.6 4 0.7 8 Hydrolysis catalyst HCl 8.0 5.0 8.0 Organic solvent PGM 0.4 12.0 8.0 Organic solvent IPA 283 280 281 Organic solvent SBAC 659 654 653 Total 1000 206 1000 290 1000 508 Refractive index 1.51 1.61 1.70 Film thickness [μm] 0.1 0.1 0.1 Hard coat layer *1 *2 *1 *2 *1 *2 Polymerizable monomer A1-6 8.0 5 44.0 30 29.0 20 Polymerizable monomer A2-3 140.0 95 103.0 70 118.0 80 Total 100 100 100 Silica particles spherical silica 63.0 43 63.0 43 63.0 43 Silane coupling agent γ-GPS 11.0 7 11.0 7 11.0 7 Metal chelate compound AlTA 1.0 0.7 1.0 0.7 1.0 0.7 Polymerization initiator APPI 11.0 7 11.0 7 11.0 7 Ultraviolet absorber UV1 10.0 7 10.0 7 10.0 7 Hydrolysis catalyst HCl 2.0 2.0 2.4 Organic solvent IPA 452 453 453 Organic solvent MIBK 302 302 302 Total 1000 165 1000 165 1000 165 Film thickness [μm] 1.5 1.5 1.5 Underlying layer *1 *2 *1 *2 *1 *2 Polymerizable monomer A1-6 20.0 100 20.0 100 20.0 100 Polymerization initiator APPI 0.5 2 0.5 2 0.5 2 Organic solvent IPA 784 784 784 Organic solvent SBAC 196 196 196 Total 1000 102 1000 102 1000 102 Film thickness [μm] 0.1 0.1 0.1 *1: Amount incorporated [g], *2: Solid content ratio [parts by mass]

(69) TABLE-US-00014 TABLE 10 Comp. Ex. 4 Comp. Ex. 5 Comp. Ex. 6 Base sheet PC PC PC Low refractive index layer (n1) *1 *2 *1 *2 *1 *2 Silicon compound MTES 18.0 100 20.0 100 18.0 100 Silane coupling agent γ-GPS 4.0 67 2.0 11 4.0 67 Metal chelate compound AlTA 0.4 7 0.2 1 0.4 7 Hydrolysis catalyst HCl 6.0 6.0 6.0 Organic solvent IPA 972 972 972 Total 1000 174 1000 112 1000 174 Refractive index 1.45 1.44 1.45 Film thickness [μm] 0.1 0.1 0.1 Medium refractive index layer (n3) *1 *2 *1 *2 *1 *2 Metal oxide particles ZrO.sub.2 5.0 100 2.0 6 2.0 11 Silane coupling agent γ-GPS 38.0 800 2.0 6 23.0 100 Organic-inorganic composite compound ASE 5.0 100 43.0 100 23.0 100 Metal chelate compound AlTA 0.7 15 0.7 2 0.8 3 Hydrolysis catalyst HCl 8.0 8.0 8.0 Organic solvent PGM 8.0 8.0 2.0 Organic solvent IPA 281 281 282 Organic solvent SBAC 654 655 659 Total 1000 1015 1000 113 1000 214 Refractive index 1.54 1.52 1.52 Film thickness [μm] 0.1 0.1 0.1 Hard coat layer *1 *2 *1 *2 *1 *2 Polymerizable monomer A1-6 15.0 10 7.0 5 147.0 100 Polymerizable monomer A2-3 132.0 90 140.0 95 0.0 0 Total 100 100 100 Silica particles spherical silica 63.0 43 63.0 43 63.0 43 Silane coupling agent γ-GPS 11.0 7 11.0 7 11.0 7 Metal chelate compound AlTA 1.0 0.7 1.0 0.7 1.0 0.7 Polymerization initiator APPI 11.0 7 11.0 7 11.0 7 Ultraviolet absorber UV1 10.0 7 10.0 7 10.0 7 Hydrolysis catalyst HCl 2.0 2.0 2.0 Organic solvent IPA 453 453 453 Organic solvent MIBK 302 302 302 Total 1000 165 1000 165 1000 165 Film thickness [μm] 1.5 1.5 1.5 Underlying layer *1 *2 *1 *2 *1 *2 Polymerizable monomer A1-6 20.0 100 20.0 100 20.0 100 Polymerization initiator APPI 0.5 2 0.5 2 0.5 2 Organic solvent IPA 784 784 784 Organic solvent SBAC 196 196 196 Total 1000 102 1000 102 1000 102 Film thickness [μm] 0.1 0.1 0.1 *1: Amount incorporated [g], *2: Solid content ratio [parts by mass]

(70) TABLE-US-00015 TABLE 11 Comp. Ex. 7 Comp. Ex. 8 Comp. Ex. 9 Base sheet PC PC PC Low refractive index layer (n1) *1 *2 *1 *2 *1 *2 Silicon compound MTES 9.0 100 13.0 100 13.0 100 Silane coupling agent γ-GPS 13.0 150 9.0 67 9.0 67 Metal chelate compound AlTA 0.7 8 0.7 7 0.7 7 Hydrolysis catalyst HCl 6.0 6.0 6.0 Organic solvent IPA 971 971 971 Total 1000 258 1000 174 1000 174 Refractive index 1.47 1.47 1.47 Film thickness [μm] 0.1 0.1 0.1 Medium refractive index layer (n3) *1 *2 *1 *2 *1 *2 Metal oxide particles ZrO.sub.2 10.0 50 10.0 50 10.0 50 Silane coupling agent γ-GPS 19.0 100 19.0 100 19.0 100 Organic-inorganic composite compound ASE 19.0 100 19.0 100 19.0 100 Metal chelate compound AlTA 0.7 4 0.7 4 0.7 4 Hydrolysis catalyst HCl 8.0 8.0 8.0 Organic solvent PGM 8.0 8.0 8.0 Organic solvent IPA 281 281 281 Organic solvent SBAC 654 654 654 Total 1000 254 1000 254 1000 254 Refractive index 1.58 1.58 1.58 Film thickness [μm] 0.1 0.1 0.1 Hard coat layer *1 *2 *1 *2 *1 *2 Polymerizable monomer A1-6 96.0 65 21.0 10 8.0 10 Polymerizable monomer A2-3 52.0 35 189.0 90 76.0 90 Total 100 100 100 Silica particles spherical silica 63.0 43 0.0 0 126.0 150 Silane coupling agent γ-GPS 11.0 7 10.5 5 11.0 13 Metal chelate compound AlTA 1.0 0.7 1.0 0.5 1.00 1.3 Polymerization initiator APPI 11.0 7 11.0 7 11.0 7 Ultraviolet absorber UV1 10.0 7 10.0 7 6.0 7 Hydrolysis catalyst HCl 2.0 2.0 2.0 Organic solvent IPA 452 454 455 Organic solvent MIBK 302 301 304 Total 1000 165 1000 120 1000 278 Film thickness [μm] 1.5 1.5 1.5 Underlying layer *1 *2 *1 *2 *1 *2 Polymerizable monomer A1-6 20.0 100 20.0 100 20.0 100 Polymerization initiator APPI 0.5 2 0.5 2 0.5 2 Organic solvent IPA 784 784 784 Organic solvent SBAC 196 196 196 Total 1000 102 1000 102 1000 102 Film thickness [μm] 0.1 0.1 0.1 *1: Amount incorporated [g], *2: Solid content ratio [parts by mass]

(71) TABLE-US-00016 TABLE 12 Comp. Ex. 10 Comp. Ex. 11 Comp. Ex. 12 Base sheet PC PC PC Low refractive index layer (n1) *1 *2 *1 *2 *1 *2 Silicon compound MTES 13.0 100 13.0 100 13.0 100 Silane coupling agent γ-GPS 9.0 67 9.0 67 9.0 67 Metal chelate compound AlTA 0.7 7 0.7 7 0.7 7 Hydrolysis catalyst HCl 6.0 6.0 6.0 Organic solvent IPA 971 971 971 Total 1000 174 1000 174 1000 174 Refractive index 1.47 1.47 1.47 Film thickness [μm] 0.1 0.1 0.1 Medium refractive index layer (n3) *1 *2 *1 *2 *1 *2 Metal oxide particles ZrO.sub.2 10.0 50 10.0 50 10.0 50 Silane coupling agent γ-GPS 19.0 100 19.0 100 19.0 100 Organic-inorganic composite compound ASE 19.0 100 19.0 100 19.0 100 Metal chelate compound AlTA 0.7 4 0.7 4 0.7 4 Hydrolysis catalyst HCl 8.0 8.0 8.0 Organic solvent PGM 8.0 8.0 8.0 Organic solvent IPA 281 281 281 Organic solvent SBAC 654 654 654 Total 1000 254 1000 254 1000 254 Refractive index 1.58 1.58 1.58 Film thickness [μm] 0.1 0.1 0.1 Hard coat layer *1 *2 *1 *2 *1 *2 Polymerizable monomer A1-6 15.0 10 15.0 10 15.0 10 Polymerizable monomer A2-3 132.0 90 132.0 90 132.0 90 Total 100 100 100 Silica particles spherical silica 63.0 43 63.0 43 63.0 43 Silane coupling agent γ-GPS 48.0 33 11.0 7 11.0 7 Metal chelate compound AlTA 5.0 0.7 1.0 0.7 1.00 0.7 Polymerization initiator APPI 11.0 7 11.0 7 11.0 7 Ultraviolet absorber UV1 10.0 7 10.0 7 10.0 7 Hydrolysis catalyst HCl 8.0 2.0 2.0 Organic solvent IPA 425 453 453 Organic solvent MIBK 283 302 302 Total 1000 190 1000 165 1000 165 Film thickness [μm] 1.5 0.5 8.0 Underlying layer *1 *2 *1 *2 *1 *2 Polymerizable monomer A1-6 20.0 100 20.0 100 20.0 100 Polymerization initiator APPI 0.5 2 0.5 2 0.5 2 Organic solvent IPA 784 784 784 Organic solvent SBAC 196 196 196 Total 1000 102 1000 102 1000 102 Film thickness [μm] 0.1 0.1 0.1 *1: Amount incorporated [g], *2: Solid content ratio [parts by mass]

(72) TABLE-US-00017 TABLE 13 Comp. Comp. Comp. Comp. Comp. Comp. Ex. 1 Ex. 2 Ex. 3 Ex. 4 Ex. 5 Ex. 6 Elongation rate  155%  130%  140%  115%  155%  102% Total light transmittance 95.80%  95.70%  99.50%  96.50%  96.10%  95.80%  Refractive index 4.20% 3.70% 0.50% 3.50% 3.90% 4.20% Hardness 2B 2B 2B 2B 2B B Abrasion resistance X ◯ X ◯ X ◯ Thermal shapability ◯ ◯ ◯ X ◯ X Comp. Comp. Comp. Comp. Comp. Comp. Ex. 7 Ex. 8 Ex. 9 Ex. 10 Ex. 11 Ex. 12 Elongation rate  110%  150%  115%  150%  155%  105% Total light transmittance 97.10%  97.10%  97.10%  97.10%  97.10%  97.10%  Refractive index 2.90% 2.90% 2.90% 2.90% 2.90% 2.90% Hardness B 2B 2B 2B 3B B Abrasion resistance ◯ ◯ ◯ ◯ X ◯ Thermal shapability X ◯ X ◯ ◯ X

(73) Comparative Example 1 is a case where the content of the silane coupling agent in the low refractive index layer was excessively low, and the abrasion resistance was inferior. Comparative Example 2 is a case where the content of the silane coupling agent in the low refractive index layer was excessively high, and the various physical properties were satisfactory, but blushing occurred. Comparative Example 3 is a case where the content of the metal oxide in the medium refractive index layer was excessively high, and the antireflective capability was superior, but the abrasion resistance was inferior. Comparative Example 4 is a case where the content of the silane coupling agent in the medium refractive index layer was excessively high, so that the elongation rate was low, and the thermal shapability was inferior. Comparative Example 5 is a case where the content of the silane coupling agent in the medium refractive index layer was excessively low, and the abrasion resistance was inferior. Comparative Example 6 is a case where the 3-urethane acrylate was not contained in the hard coat layer, so that the elongation rate was very low, and the thermal shapability was inferior. Comparative Example 7 is a case where the content of the 3-urethane acrylate in the hard coat layer was low, so that the elongation rate was low, and the thermal shapability was inferior. Comparative Example 8 is a case where the silica particles were not contained in the hard coat layer, and the various physical properties were satisfactory, but blushing occurred. Comparative Example 9 is a case where excess silica particles were contained in the hard coat layer, and the abrasion resistance was inferior. Comparative Example 10 is a case where an excess of the silane coupling agent was contained in the hard coat layer, and the various physical properties were satisfactory, but blushing occurred. Comparative Example 11 is a case where the thickness of the hard coat layer was extremely small, so that the abrasion resistance and the hardness were inferior. Comparative Example 12 is a case where the thickness of the hard coat layer was extremely large, so that the elongation rate was low, and the thermal shapability was inferior.