INTERLAYER FOR LAMINATED GLASS AND LAMINATED GLASS

Abstract

The present invention provides an interlayer film for laminated glass, that exhibits an excellent sound-insulating performance for solid-borne sound in an environment at or below 0° C. Another object is to provide laminated glass that is obtained using this interlayer film for laminated glass. The present invention is an interlayer film for laminated glass, that has a sound-insulating layer for which a temperature T1, which is the temperature that gives the maximum value of tan δ at a frequency of 1 Hz, is in the range from −30° C. to 0° C.

Claims

1. An interlayer film for laminated glass, comprising a sound-insulating layer for which a temperature T1, which is a temperature that gives a maximum value of tan δ at a frequency of 1 Hz, is in a range from −30° C. to 0° C.

2. The interlayer film for laminated glass according to claim 1, wherein the sound-insulating layer contains 71 parts by weight or more of plasticizer with respect to 100 parts by weight of polyvinyl acetal resin that has 3 or 4 carbons in an acetal group.

3. The interlayer film for laminated glass according to claim 2, wherein the plasticizer content is 160 parts by weight or less with respect to 100 parts by weight of the polyvinyl acetal resin that has 3 or 4 carbons in the acetal group.

4. The interlayer film for laminated glass according to claim 2, wherein the polyvinyl acetal resin that has 3 or 4 carbons in the acetal group has an average degree of polymerization of 2600 or more.

5. The interlayer film for laminated glass according to claim 2, wherein a quantity of the hydroxyl group in the polyvinyl acetal resin that has 3 or 4 carbons in the acetal group is 21.5 mol % or less.

6. The interlayer film for laminated glass according to claim 2, wherein a quantity of the acetyl group in the polyvinyl acetal resin that has 3 or 4 carbons in the acetal group is 15 mol % or more.

7. The interlayer film for laminated glass according to claim 1, wherein the sound-insulating layer contains 50 parts by weight or more of plasticizer with respect to 100 parts by weight of polyvinyl acetal resin that has 5 or more carbons in the acetal group.

8. The interlayer film for laminated glass according to claim 7, wherein the plasticizer content is 80 parts by weight or less with respect to 100 parts by weight of the polyvinyl acetal resin that has 5 or more carbons in the acetal group.

9. The interlayer film for laminated glass according to claim 7, wherein the polyvinyl acetal resin that has 5 or more carbons in the acetal group has an average degree of polymerization of 2600 or more.

10. The interlayer film for laminated glass according to claim 7, wherein the quantity of the hydroxyl group in the polyvinyl acetal resin that has 5 or more carbons in the acetal group is 39 mol % or less.

11. The interlayer film for laminated glass according to claim 7, wherein the quantity of the acetyl group in the polyvinyl acetal resin that has 5 or more carbons in the acetal group is 5 mol % or more.

12. The interlayer film for laminated glass according to claim 1, wherein the sound-insulating layer is interposed between two protective layers, and the temperature T2, which is the temperature that gives the maximum value of tan δ for the protective layer at a frequency of 1 Hz, is greater than T1.

13. The interlayer film for laminated glass according to claim 8, wherein the temperature T2, which is the temperature that gives the maximum value of tan δ for the protective layer at a frequency of 1 Hz, is in the range from 0° C. to 40° C.

14. The interlayer film for laminated glass according to claim 8, wherein the protective layer contains 25 to 50 parts by weight of plasticizer with respect to 100 parts by weight of a polyvinyl acetal resin in which the acetal group has 3 or 4 carbons, the degree of acetalation is 60 to 75 mol %, and the quantity of acetyl group is 10 mol % or less.

15. A laminated glass, which comprises the interlayer film for laminated glass according to claim 1, interposed between two transparent sheets.

16. A method of producing an interlayer film for laminated glass having a sound-insulating layer for which a temperature T1, which is a temperature that gives a maximum value of tan δ at a frequency of 1 Hz, is in a range from −30° C. to 0° C., which is interposed between two protective layers, and the temperature T2, which is the temperature that gives the maximum value of tan δ for the protective layer at a frequency of 1 Hz, is greater than T1, comprising a step of preparing a resin composition for forming the sound-insulating layer and a resin composition for forming the protective layer individually, and a step of co-extruding these resin compositions into a single body.

17. A method of producing an interlayer film for laminated glass having a sound-insulating layer for which a temperature T1, which is a temperature that gives a maximum value of tan δ at a frequency of 1 Hz, is in a range from −30° C. to 0° C., which is interposed between two protective layers, and the temperature T2, which is the temperature that gives the maximum value of tan δ for the protective layer at a frequency of 1 Hz, is greater than T1, comprising a step of preparing a resin composition for forming the sound-insulating layer and a resin composition for forming the protective layer individually, and a step of converting these resin compositions into a sheet by extrusion or press molding, and a step of laminating and conversing them into a single body.

Description

BEST MODE FOR CARRYING OUT THE INVENTION

[0071] The embodiments of the present invention are more particularly described in the following using examples, but the present invention is not limited only to these examples.

Example 1

(1) Preparation of Resin Composition A

[0072] A sound-insulating layer resin composition A was prepared by adding 71 parts by weight of triethylene glycol di-2-ethylhexanoate (3GO) as plasticizer to 100 parts by weight of polyvinyl butyral resin having 4 carbons in the acetal group, an acetyl group quantity of 13 mol %, a hydroxyl group quantity of 22.5 mol %, and an average degree of polymerization of 2300, and thoroughly mixing/kneading using a mixing roll.

[0073] A polyvinyl butyral resin obtained by acetalation with n-butylaldehyde was used here.

(2) Preparation of Resin Composition C

[0074] A protective layer resin composition C was prepared by adding 30.5 parts by weight of triethylene glycol di-2-ethylhexanoate (3GO) as plasticizer to 100 parts by weight of polyvinyl butyral resin having 4 carbons in the acetal group, an acetyl group quantity of 1 mol %, and a degree of butyralization of 65 mol %, and thoroughly mixing/kneading using a mixing roll.

[0075] A polyvinyl butyral resin obtained by acetalation with n-butylaldehyde was used here.

(3) Fabrication of an Interlayer Film for Laminated Glass

[0076] A resin composition sheet A having a thickness of 0.1 mm was obtained by sandwiching the resin composition A between two Teflon (registered trademark) sheets with an interposed 0.1 mm clearance sheet and press molding at 150° C.

[0077] A resin composition sheet C having a thickness of 0.35 mm was obtained by sandwiching the resin composition C between two Teflon (registered trademark) sheets with an interposed 0.35 mm clearance sheet and press molding at 150° C.

[0078] The obtained resin composition sheets A and C were laminated in the sequence C/A/C. A 0.8 mm-thick interlayer film for laminated glass was then obtained by sandwiching this laminate between two Teflon (registered trademark) sheets with an interposed 0.8 mm clearance sheet and press molding at 150° C.

Examples 2 to 27 and Comparative Example 1

[0079] Interlayer films for laminated glass were obtained as in Example 1, but using the type of polyvinyl acetal resin for resin composition A and the quantity of plasticizer incorporation as shown in Tables 1 to 4.

[0080] For Example 20, a polyvinyl acetal resin provided by acetalation with propionaldehyde was used in place of the polyvinyl butyral resin in the preparation of resin composition A according to Example 2.

Example 28

[0081] An interlayer film for laminated glass was obtained as in Example 5, but in this case using triethylene glycol di-2-ethylbutyrate (3GH) as the plasticizer in the preparation of resin composition A and resin composition C.

Example 29

[0082] An interlayer film for laminated glass was obtained as in Example 5, but in this case using triethylene glycol di-n-heptanoate (3G7) as the plasticizer in the preparation of resin composition A and resin composition C.

Example 30

[0083] An interlayer film for laminated glass was obtained as in Example 5, but in this case using tetraethylene glycol di-2-ethylhexanoate (4GO) as the plasticizer in the preparation of resin composition A and resin composition C.

Example 31

[0084] An interlayer film for laminated glass was obtained as in Example 5, but in this case using tetraethylene glycol di-2-ethylbutyrate (4GH) as the plasticizer in the preparation of resin composition A and resin composition C.

Example 32

[0085] An interlayer film for laminated glass was obtained as in Example 5, but in this case using tetraethylene glycol di-n-heptanoate (4G7) as the plasticizer in the preparation of resin composition A and resin composition C.

(Evaluations)

[0086] The interlayer films for laminated glass obtained in the examples and comparative examples were evaluated as follows. The results are given in Tables 1 to 4.

(1) Measurement of the Temperatures T1 and T2 that Give the Maximum Value of Tan δ at a Frequency of 1 Hz

[0087] The resin compositions A, B, and C obtained in the examples and comparative examples were each press molded at 150° C. to fabricate the 0.8 mm-thick sheet. A circle with a diameter of 8 mm was then cut from this sheet to produce a test sheet. The temperatures T1 and T2 giving the maximum tan δ value at a frequency of 1 Hz were measured by measuring tan δ by temperature sweep measurement of the dynamic viscoelasticity of the test sheet using a shear procedure at a rate of temperature rise of 3° C./minute, a frequency of 1 Hz, and a strain rate of 1.0% using a viscoelasticity measurement instrument (“ARES” manufactured by Rheometric Scientific Inc.).

(2) Evaluation of the Loss Factor

[0088] The obtained interlayer film for laminated glass was cut to length 30 mm×width 320 mm and was sandwiched by two sheets of transparent float glass (length 25 mm×width 305 mm×thickness 2.0 mm) and vacuum pressing was performed with a vacuum laminator by holding for 30 minutes at 90° C. The evaluation sample was fabricated by cutting off the interlayer film for laminated glass that had exuded from the glass.

[0089] The loss factor was measured on the obtained evaluation sample by a central vibration technique at 0° C. using an “SA-01” measurement instrument from RION Co., Ltd. The loss factor for the first mode (around 100 Hz) of the resonance frequency of the obtained loss factor was evaluated.

(3) Evaluation of Sheet Slippage

[0090] The obtained laminated glass interlayer film (15×30 cm) was sandwiched by two sheets of transparent float glass (length 15 cm×width 30 cm×thickness 2.0 mm), and the evaluation sample was obtained by vacuum pressing using a vacuum laminator by holding for 30 minutes at 90° C.

[0091] One side of the obtained evaluation sample was fixed to a vertical surface and float glass (15 cm×30 cm×thickness 15 mm) was bonded to the other side using double-sided tape. A reference line was drawn on the side of the laminated glass in order to measure the amount of slippage and the assembly was held for 30 days in an 80° C. environment. The amount of slippage for the two glass sheets in the evaluation sample was measured after the 30 days had passed.

(4) Evaluation of bleed out

[0092] The obtained interlayer film for laminated glass was cut to length 100 mm×width 100 mm and was stacked in the sequence glass/PET film/interlayer film for laminated glass/PET film/glass using a release-treated 100 μm-thick PET film (length 100 mm×width 100 mm) and transparent float glass (length 100 mm×width 100 mm); vacuum pressing was performed with a vacuum laminator by holding for 30 minutes at 90° C. After this, the glass and PET film were removed and the interlayer film for laminated glass was recovered and 5 lines with a length of 8 cm were drawn in a 23° C. environment on the surface of the interlayer film for laminated glass using an oil-based marking pen. The interlayer film for laminated glass was then stored for 4 weeks at 23° C. The interlayer film for laminated glass was subsequently visually evaluated using the following scale: a score of “double concentric circles” was rendered when all of the lines were unblurred even after storage for 4 weeks; a score of “open circle” was rendered when all the lines were unblurred after storage for 3 weeks, but at least one of the lines was blurred after storage for 4 weeks; and a score of “open triangle” was rendered when all of the lines were unblurred after storage for 2 weeks, but at least one of the lines was blurred after storage for 3 weeks.

TABLE-US-00001 TABLE 1 Ex- Ex- Ex- Ex- Ex- Ex- Ex- Ex- ample ample ample ample ample ample ample ample 1 2 3 4 5 6 7 8 resin layer A number of carbons 4 4 4 4 4 4 4 4 quantity of 13 13 13 13 13 13 13 13 acetyl group/mol % quantity of 22.5 22.5 22.5 22.5 22.5 22.5 22.5 19.7 hydroxyl group/mol % average degree of 2300 2300 2300 2300 2700 3000 3500 2700 polymerization quantity of 71 80 100 120 80 100 140 80 plasticizer/phr resin layer B number of carbons — — — — — — — — quantity of — — — — — — — — acetyl group/mol % quantity of — — — — — — — — hydroxyl group/mol % average degree of — — — — — — — — polymerization quantity of — — — — — — — — plasticizer/phr resin layer C degree of 68.5 68.5 68.5 68.5 68.5 68.5 68.5 68.5 butyralization/mol % quantity of 1 1 1 1 1 1 1 1 acetyl group/mol % quantity of 40 40 40 40 40 40 40 40 plasticizer/phr temperature giving the resin layer A −0.5 −5.6 −13.1 −17.6 −5.2 −12.4 −21.3 −4.8 maximum value of tan δ resin layer B — — — — — — — — at a frequency of 1 Hz resin layer C 30.5 30.5 30.5 30.5 30.5 30.5 30.5 30.5 loss factor (0° C., around 100 Hz) 0.12 0.21 0.27 0.34 0.2 0.25 0.28 0.28 sheet slippage/mm 0.4 1.2 1.8 2.4 0.2 0.1 0.3 0.3 bleed out ⊚ ◯ ◯ ◯ ◯ ◯ ◯ ⊚

TABLE-US-00002 TABLE 2 Ex- Ex- Ex- Ex- Ex- Ex- Ex- Ex- ample ample ample ample ample ample ample ample 9 10 11 12 13 14 15 16 resin layer A number of carbons 4 4 4 4 4 4 4 4 quantity of 1.3 5.1 8.9 13 13 17.6 21.8 30 acetyl group/mol % quantity of 13.5 18.5 20 20 18.5 30.5 34.5 38.5 hydroxyl group/mol % average degree of 2700 2700 2700 2700 2700 2700 2700 2700 polymerization quantity of 80 80 80 80 80 80 80 80 plasticizer/phr resin layer B number of carbons — — — — — — — — quantity of — — — — — — — — acetyl group/mol % quantity of — — — — — — — — hydroxyl group/mol % average degree of — — — — — — — — polymerization quantity of — — — — — — — — plasticizer/phr resin layer C degree of 68.5 68.5 68.5 68.5 68.5 68.5 68.5 68.5 butyralization/mol % quantity of 1 1 1 1 1 1 1 1 acetyl group/mol % quantity of 40 40 40 40 40 40 40 40 plasticizer/phr temperature giving the resin layer A −8.1 −5.7 −6.5 −5.5 −10.2 −5.3 −5.5 −4.5 maximum value of tan δ resin layer B — — — — — — — — at a frequency of 1 Hz resin layer C 30.5 30.5 30.5 30.5 30.5 30.5 30.5 30.5 loss factor (0° C., around 100 Hz) 0.23 0.21 0.22 0.21 0.26 0.23 0.23 0.23 sheet slippage/mm 0.4 0.2 0.2 0.2 0.5 0.2 0.2 0.2 bleed out ⊚ ⊚ ⊚ ⊚ ⊚ ⊚ ⊚ ⊚

TABLE-US-00003 TABLE 3 Ex- Ex- Ex- Ex- Ex- Ex- Ex- Ex- ample ample ample ample ample ample ample ample 17 18 19 20 21 22 23 24 resin layer A number of carbons 4 4 4 3 4 4 4 4 quantity of 17.6 21.8 13 13 13 13 13 15 acetyl group/mol % quantity of 33.5 36.2 22.5 22.5 22.5 22.5 21.5 23.5 hydroxyl group/mol % average degree of 2700 2700 2300 2300 2300 2600 2700 2700 polymerization quantity of 100 100 160 80 150 80 80 80 plasticizer/phr resin layer B number of carbons — — — — — — — — quantity of — — — — — — — — acetyl group/mol % quantity of — — — — — — — — hydroxyl group/mol % average degree of — — — — — — — — polymerization quantity of — — — — — — — — plasticizer/phr resin layer C degree of 68.5 68.5 68.5 68.5 68.5 68.5 68.5 68.5 butyralization/mol % quantity of 1 1 1 1 1 1 1 1 acetyl group/mol % quantity of 40 40 40 40 40 40 40 40 plasticizer/phr temperature giving the resin layer A −7.8 −10.5 −24.2 −2.1 −22.5 −5.4 −7.5 −5.5 maximum value of tan δ resin layer B — — — — — — — — at a frequency of 1 Hz resin layer C 30.5 30.5 30.5 30.5 30.5 30.5 30.5 30.5 loss factor (0° C., around 100 Hz) 0.26 0.3 0.21 0.17 0.23 0.21 0.26 0.23 sheet slippage/mm 0.4 0.4 5.2 1 4.6 0.5 0.2 0.2 bleed out ⊚ ⊚ Δ ◯ ◯ ◯ ⊚ ⊚

TABLE-US-00004 TABLE 4 Compar- Ex- Ex- Ex- Ex- Ex- Ex- Ex- Ex- ative ample ample ample ample ample ample ample ample Example 25 26 27 28 29 30 31 32 1 resin layer A number of carbons 4 4 4 4 4 4 4 4 4 quantity of 13 13 13 13 13 13 13 13 13 acetyl group/mol % quantity of 22.5 22.5 19.5 22.5 22.5 22.5 22.5 22.5 22.5 hydroxyl group/mol % average degree of 2700 2700 3200 2700 2700 2700 2700 2700 2300 polymerization quantity of 100 80 160 80 80 80 80 80 60 plasticizer/phr resin layer B number of carbons — — — — — — — — — quantity of — — — — — — — — — acetyl group/mol % quantity of — — — — — — — — — hydroxyl group/mol % average degree of — — — — — — — — — polymerization quantity of — — — — — — — — — plasticizer/phr resin layer C degree of 70 70 68.5 68.5 68.5 68.5 63.5 68.5 68.5 butyralization/mol % quantity of 10 10 1 1 1 1 1 1 1 acetyl group/mol % quantity of 50 25 40 40 40 40 40 40 40 plasticizer/phr temperature giving the resin layer A −13.1 −5.2 −29 −6.2 −6 −5 −5.5 −5.8 2.8 maximum value of tan δ resin layer B — — — — — — — — — at a frequency of 1 Hz resin layer C 3.6 38.6 30.5 30.5 30.5 30.5 30.5 30.5 30.5 loss factor (0° C., around 100 Hz) 0.25 0.19 0.17 0.22 0.21 0.21 0.21 0.21 0.08 sheet slippage/mm 0.2 0.2 1.4 0.2 0.2 0.2 0.2 0.2 0.08 bleed out ◯ ◯ Δ ◯ ◯ ◯ ◯ ◯ ⊚

Example 33

(1) Preparation of Resin Composition B

[0093] A sound-insulating layer resin composition A was prepared by adding 60 parts by weight of triethylene glycol di-2-ethylhexanoate (3GO) as plasticizer to 100 parts by weight of polyvinyl acetal resin having 5 carbons in the acetal group, an acetyl group quantity of 13 mol %, a hydroxyl group quantity of 22.5 mol %, and an average degree of polymerization of 2300, and thoroughly mixing/kneading using a mixing roll.

[0094] A polyvinyl acetal resin obtained by acetalation with n-valeraldehyde was used here.

(2) Preparation of Resin Composition C

[0095] A protective layer resin composition C was prepared by adding 30.5 parts by weight of triethylene glycol di-2-ethylhexanoate (3GO) as plasticizer to 100 parts by weight of polyvinyl butyral resin having 4 carbons in the acetal group, an acetyl group quantity of 1 mol %, and a degree of butyralization of 65 mol %, and thoroughly mixing/kneading using a mixing roll.

[0096] A polyvinyl butyral resin obtained by acetalation with n-butylaldehyde was used here.

(3) Fabrication of an Interlayer Film for Laminated Glass

[0097] A resin composition sheet B having a thickness of 0.1 mm was obtained by sandwiching the resin composition B between two Teflon (registered trademark) sheets with an interposed 0.1 mm clearance sheet and press molding at 150° C.

[0098] A resin composition sheet C having a thickness of 0.35 mm was obtained by sandwiching the resin composition C between two Teflon (registered trademark) sheets with an interposed 0.35 mm clearance sheet and press molding at 150° C.

[0099] The obtained resin composition sheets B and C were laminated in the sequence C/B/C. A 0.8 mm-thick interlayer film for laminated glass was then obtained by sandwiching this laminate between two Teflon (registered trademark) sheets with an interposed 0.8 mm clearance sheet and press molding at 150° C.

Examples 34 to 51 and Comparative Examples 2 and 3

[0100] Interlayer films for laminated glass were obtained as in Example 1, but using the type of polyvinyl acetal resin for resin composition B and the quantity of plasticizer incorporation as shown in Tables 4 to 6. The same evaluations as in Example 1 were also performed. The results are given in Tables 5 to 7.

[0101] Polyvinyl acetal resin obtained by acetalation with n-valeraldehyde was used for the polyvinyl acetal resin that contained 5 carbons in the acetal group. Polyvinyl acetal resin obtained by acetalation with n-hexylaldehyde was used for the polyvinyl acetal resin that contained 6 carbons in the acetal group. Polyvinyl acetal resin obtained by acetalation with n-heptylaldehyde was used for the polyvinyl acetal resin that contained 7 carbons in the acetal group. Polyvinyl acetal resin obtained by acetalation with n-octylaldehyde was used for the polyvinyl acetal resin that contained 8 carbons in the acetal group. Polyvinyl acetal resin obtained by acetalation with n-nonylaldehyde was used for the polyvinyl acetal resin that contained 9 carbons in the acetal group. Polyvinyl acetal resin obtained by acetalation with n-decylaldehyde was used for the polyvinyl acetal resin that contained 10 carbons in the acetal group. Polyvinyl acetal resin obtained by acetalation with n-undecylaldehyde was used for the polyvinyl acetal resin that contained 11 carbons in the acetal group. Polyvinyl acetal resin obtained by acetalation with n-dodecylaldehyde was used for the polyvinyl acetal resin that contained 12 carbons in the acetal group.

TABLE-US-00005 TABLE 5 Ex- Ex- Ex- Ex- Ex- Ex- Ex- Ex- ample ample ample ample ample ample ample ample 33 34 35 36 37 38 39 40 resin layer A number of carbons — — — — — — — — quantity of — — — — — — — — acetyl group/mol % quantity of — — — — — — — — hydroxyl group/mol % average degree of — — — — — — — — polymerization quantity of — — — — — — — — plasticizer/phr resin layer B number of carbons 5 6 7 8 9 10 11 12 quantity of 13 13 13 13 13 13 13 13 acetyl group/mol % quantity of 22.5 30.5 31.2 34.5 32.8 33.9 34.6 35 hydroxyl group/mol % average degree of 2300 2300 2300 2300 2300 2300 2300 2300 polymerization quantity of 60 60 60 60 50 50 50 50 plasticizer/phr resin layer C degree of 68.5 68.5 68.5 68.5 68.5 68.5 68.5 68.5 butyralization/mol % quantity of 1 1 1 1 1 1 1 1 acetyl group/mol % quantity of 40 40 40 40 40 40 40 40 plasticizer/phr temperature giving the resin layer A — — — — — — — — maximum value of tan δ resin layer B −8.8 −7.4 −6.5 −5.5 −2.8 −3.5 −4.4 −3.8 at a frequency of 1 Hz resin layer C 30.5 30.5 30.5 30.5 30.5 30.5 30.5 30.5 loss factor (around 100 Hz) 0.26 0.25 0.24 0.22 0.19 0.2 0.22 0.2 sheet slippage/mm 1.4 1.3 1.3 1.3 0.8 0.6 0.6 0.6 bleed out ⊚ ⊚ ⊚ ⊚ ⊚ ⊚ ⊚ ⊚

TABLE-US-00006 TABLE 6 Ex- Ex- Ex- Ex- Ex- Ex- Ex- Ex- ample ample ample ample ample ample ample ample 41 42 43 44 45 46 47 48 resin layer A number of carbons — — — — — — — — quantity of — — — — — — — — acetyl group/mol % quantity of — — — — — — — — hydroxyl group/mol % average degree of — — — — — — — — polymerization quantity of — — — — — — — — plasticizer/phr resin layer B number of carbons 6 6 6 6 6 6 6 6 quantity of 13 13 13 5.1 8.9 17.6 21.8 30 acetyl group/mol % quantity of 40 35 26.5 29.4 30.5 32.5 34.5 39 hydroxyl group/mol % average degree of 3200 2700 2100 2700 2700 2700 2700 2700 polymerization quantity of 100 80 50 60 60 60 60 60 plasticizer/phr resin layer C degree of 68.5 68.5 68.5 68.5 68.5 68.5 68.5 68.5 butyralization/mol % quantity of 1 1 1 1 1 1 1 1 acetyl group/mol % quantity of 40 40 40 40 40 40 40 40 plasticizer/phr temperature giving the resin layer A — — — — — — — — maximum value of tan δ resin layer B −12.8 −10.5 −4.5 −3.2 −4.5 −7.3 −7.9 −6.8 at a frequency of 1 Hz resin layer C 30.5 30.5 30.5 30.5 30.5 30.5 30.5 30.5 loss factor (around 100 Hz) 0.33 0.29 0.22 0.15 0.17 0.25 0.27 0.25 sheet slippage/mm 0.1 0.2 1.7 0.1 0.1 0.2 0.2 0.2 bleed out ◯ ⊚ ⊚ ⊚ ⊚ ⊚ ⊚ ⊚

TABLE-US-00007 TABLE 7 Compar- Compar- Ex- Ex- Ex- ative ative ample ample ample Example Example 49 50 51 2 3 resin layer A number of carbons — — — — — quantity of — — — — — acetyl group/mol % quantity of — — — — — hydroxyl group/mol % average degree of — — — — — polymerization quantity of — — — — — plasticizer/phr resin layer B number of carbons 8 8 6 5 8 quantity of 17.6 21.8 13 13 13 acetyl group/mol % quantity of 35.5 38.5 30.5 34.5 26.5 hydroxyl group/mol % average degree of 2700 2700 2600 2300 2300 polymerization quantity of 60 60 60 45 120 plasticizer/phr resin layer C degree of 68.5 68.5 68.5 68.5 68.5 butyralization/mol % quantity of 1 1 1 1 1 acetyl group/mol % quantity of 40 40 40 40 40 plasticizer/phr temperature giving the resin layer A — — — — — maximum value of tan δ resin layer B −8 −9.3 −7.1 3.4 −30.2 at a frequency of 1 Hz resin layer C 30.5 30.5 30.5 30.5 30.5 loss factor (around 100 Hz) 0.3 0.31 0.25 0.08 0.08 sheet slippage/mm 0.2 0.2 0.4 0 12.2 bleed out ⊚ ⊚ ⊚ ⊚ X

INDUSTRIAL APPLICABILITY

[0102] The present invention can provide an interlayer film for laminated glass, that exhibits an excellent sound-insulating performance for solid-borne sound in an environment at or below 0° C. In addition, the present invention can provide laminated glass that is obtained using this interlayer film for laminated glass.