SELF-ADHESIVE COMPOUND AND USE THEREOF IN AN ADHESIVE TAPE

Abstract

A single- or double-sidedly bonding adhesive-sheet strip having a self-adhesive composition comprising a) at least one elastomer, at least one type of polybutadiene block copolymer being used as an elastomer, b) at least one partially hydrogenated hydrocarbon resin having a softening temperature of at least 90 C., c) at least one additional hydrocarbon resin, a terpene phenol resin and/or a colophonium resin having a softening temperature of at least 90 C., d) an optional soft resin, and e) additional additives as applicable.

Claims

1. A single- or double-sidedly bonding adhesive-sheet strip, which is carrier-free and hence of only single-ply configuration, comprising a pressure-sensitive adhesive composition at least comprising: (a) at least one elastomer, the elastomer having a fraction of at least 40 wt %, based on the total adhesive composition, and elastomer used comprising at least one kind of a polybutadiene block copolymer that is not hydrogenated in the polybutadiene block; (b) at least one partly hydrogenated hydrocarbon resin (tackifying resin kind 1) having a softening temperature of at least 90 C.; (c) optionally at least one further hydrocarbon resin, a terpene-phenolic resin and/or a rosin having a softening temperature of at least 90 C. (tackifying resin kind 2); (d) optionally a plasticizing resin or plasticizing resin mixture present at a fraction between 0 wt % and 6 wt %, based on the total adhesive composition; and (e) optionally further additives, wherein the tan of the pressure-sensitive adhesive composition at application temperature (here 25 C.) at 10 rad/s is at least 0.20 and at 100 rad/s is at least 0.40, and at 10 rad/s is not more than 0.40 and at 100 rad/s is not more than 1.00.

2. The single- or double-sidedly bonding adhesive-sheet strip according to claim 1, wherein the plasticizing resin or plasticizing resin mixture has a melt viscosity at 25 C. and 1 Hz of at least 25 Pa*s and a softening temperature of <25 C.

3. The single- or double-sidedly bonding adhesive-sheet strip according to claim 1, wherein the fraction of the polybutadiene block copolymer or of the mixture of different polybutadiene block copolymers in the elastomer is at least 90 wt %, based on the total elastomer amount.

4. The single- or double-sidedly bonding adhesive-sheet strip according to claim 1, at least one polybutadiene block copolymer is a triblock copolymer or a higher multiblock copolymer having at least two A blocks.

5. The single- or double-sidedly bonding adhesive-sheet strip according to claim 1, wherein the polybutadiene block copolymers have a polyvinylaromatic fraction of 20 wt % to 40 wt %.

6. The single- or double-sidedly bonding adhesive-sheet strip according to claim 1, wherein the fraction of the polybutadiene block copolymers, in total, based on the overall pressure-sensitive adhesive, is at least 40 wt %, and the maximum fraction of the polybutadiene block copolymers, in total, based on the total adhesive composition, is not more than 60 wt %.

7. The single- or double-sidedly bonding adhesive-sheet strip according to claim 1, wherein elastomer used comprises an elastomer mixture consisting of A-B-A triblock copolymer and A-B diblock copolymer, the fraction of A-B-A triblock copolymer, based on the total amount of elastomer used, being at least 50 wt %.

8. The single- or double-sidedly bonding adhesive-sheet strip according to claim 1, wherein the total tackifying resin content in the pressure-sensitive adhesive composition is at least 30 wt %, and not more than 60 wt %.

9. The single- or double-sidedly bonding adhesive-sheet strip according to claim 1, wherein the fraction of tackifying resin kind 1 is at least 25 wt % and not more than 60 wt %, based on the total adhesive composition.

10. The single- or double-sidedly bonding adhesive-sheet strip according to claim 1, wherein the adhesive-sheet strip is redetachable without residue or destruction by extensive stretching substantially in the bond plane.

11. The single- or double-sidedly bonding adhesive-sheet strip according to claim 1, wherein the adhesive-sheet strip is transparent and the total transmission of the adhesive-sheet strip is >85%.

12. The single- or double-sidedly bonding adhesive-sheet strip according to claim 1, wherein the adhesive-sheet strip is ozone resistant.

13. The single- or double-sidedly bonding adhesive-sheet strip according to claim 1, wherein the plasticizing resin is a hydrocarbon-based or a rosin-based plasticizing resin

14. A method comprising: bonding an article to a hydrophilic surface wherein said article is bonded to said hydrophilic surface with the adhesive-sheet strip, according to claim 1, or bonding the adhesive-sheet strip, according to claim 1, between two substrates, of which at least one is transparent and/or one substrate is designed in such a way that a load can be affixed thereto.

15. The method according to claim 14, further comprising: detaching the adhesive-sheet strip, without residue or destruction, by extensively stretching substantially in a bond plane of the adhesive-sheet strip.

16. A single- or double-sidedly bonding adhesive-sheet strip, which is carrier-free and hence of only single-ply configuration, comprising a pressure-sensitive adhesive composition at least comprising: (a) at least one elastomer, the elastomer having a fraction of at least 40 wt %, based on the total adhesive composition, and elastomer used comprising at least one kind of a polybutadiene block copolymer that is not hydrogenated in the polybutadiene block; (b) at least one nonhydrogenated hydrocarbon resin (tackifying resin kind 1) having a softening temperature of at least 90 C.; (c) at least one further resin comprising at least partly hydrogenated or disproportionated hydrocarbon resin, terpene-phenolic resin and/or rosin having a softening temperature of at least 90 C. (tackifying resin kind 2); (d) optionally a plasticizing resin or plasticizing resin mixture present at a fraction between 0 wt % and 6 wt %, based on the total adhesive composition; and (e) optionally further additives, wherein the tan of the pressure-sensitive adhesive composition at application temperature (here 25 C.) at 10 rad/s is at least 0.20 and at 100 rad/s is at least 0.40, and at 10 rad/s is not more than 0.40 and at 100 rad/s is not more than 1.00.

17. The single- or double-sidedly bonding adhesive-sheet strip according to claim 16, wherein the plasticizing resin or plasticizing resin mixture has a melt viscosity at 25 C. and 1 Hz of at least 25 Pa*s and a softening temperature of <25 C.

18. The single- or double-sidedly bonding adhesive-sheet strip according to claim 16, wherein the adhesive-sheet strip is redetachable without residue or destruction by extensive stretching substantially in the bond plane.

19. The single- or double-sidedly bonding adhesive-sheet strip according to claim 16, wherein the adhesive-sheet strip is transparent and the total transmission of the adhesive-sheet strip is >85%.

20. The single- or double-sidedly bonding adhesive-sheet strip according to claim 16, wherein the adhesive-sheet strip is ozone resistant.

21. The single- or double-sidedly bonding adhesive-sheet strip according to claim 16, wherein the plasticizing resin is a hydrocarbon-based or a rosin-based plasticizing resin

22. The single- or double-sidedly bonding adhesive-sheet strip according to claim 16, wherein the fraction of tackifying resin kind 1 is at least 15 wt % and not more than 30 wt %, based on the total adhesive composition

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0119] FIG. 1 shows the pressure-sensitive adhesive strip of the invention where the core layer consists of an adhesive and

[0120] FIG. 2 shows the pressure-sensitive adhesive strip of the invention where the core layer consists of a carrier,

[0121] FIG. 3 shows how an article is bonded on a substrate using an adhesive strip as per FIG. 1,

[0122] FIG. 4 shows the method for detaching the article bonded with the pressure-sensitive adhesive strip,

[0123] FIG. 5 shows dynamic-mechanical profiles of adhesives of the invention, and of materials/formulations employed for comparison, and

[0124] FIG. 6 shows the diagrammatic representation for evaluating a glass transition temperature by test L.

[0125] FIG. 7 shows micrographs of adhesive sheets after the ozone test. a) No ozone damage b) slight ozone damage c) severe ozone damage

[0126] FIG. 1 shows the pressure-sensitive adhesive strip 10 of the invention wherein the core layer 1 consists of the adhesive of the invention, which is redetachable by extensive stretching particularly in the bond plane.

[0127] The core layer 1 has a region which serves as a grip tab, on which pulling takes place in order to effect the extensive stretching particularly in the bond plane of the core layer 1. This region is rendered nonpressure-sensitive adhesive on both sides by the application of preferably siliconized foil or paper sections 6.

[0128] FIG. 2 shows the pressure-sensitive adhesive strip 10 of the invention wherein the core layer 1 consists of a carrier which is redetachable by extensive stretching particularly in the bond plane.

[0129] Applied on the carrier 1 are two adhesive layers 2, 3 of the invention, which preferably have the same composition.

[0130] FIG. 3 shows how an article 11 is bonded to a substrate 12a hydrophilic substrate, for exampleusing an adhesive strip 10 as per FIG. 1. The article 11 is a hook. 11 and/or 12 may be transparent in configuration.

[0131] FIG. 4 shows the method for detaching the article 11 bonded with the pressure-sensitive adhesive strip 10.

[0132] Pulling takes place from the grip tab of the adhesive strip 10 in the direction of the bond plane, leading to stretching. On account of the stretching, the core layer loses bond strength, and parts from the substrate 12.

[0133] The stretching of the core layer 1 is continued until separation of the core layer 1 from the substrate 12 is complete.

[0134] FIG. 5 represents the measurement plots for examples 1 to 10, obtained according to test method J. From the data, the advantageous tan ranges can be read off.

[0135] FIG. 6 shows, diagrammatically, the procedure for determining the glass transition temperature from a thermogram recorded according to test L.

TEST METHODS

Test ATip-Shear Holding Power

[0136] For determining the tip-shear strength, the sheet of adhesive under test, with dimensions of 20 mm50 mm and provided at one end on both sides with a nonpressure-sensitively adhesive grip tab region (obtained by laminated application of 25 m-thick, biaxially oriented polyester film with dimensions of 20 mm13 mm), is bonded centrally to a polystyrene base plate with dimensions of 40 mm20 mm3 mm (lengthwidththickness). Plugged onto the base plate is a steel pin 10 cm long, which sits vertically on the plate face. The specimens obtained are bonded with a force of 100 N to a glass plate (pressing time =5 sec) and left for 5 minutes in the unloaded state. Following application of the selected tip-shear load by the hanging-on of a weight (20 N with 50 mm lever arm), a record is made of the time taken for the bond to fail (i.e., the tip-shear holding power). The test conditions are 23 C. and a relative humidity of 50%. For many applications, the higher the tip-shear holding power, the better.

Test BPeel Rate

[0137] For the determination of the peel strength, the pressure-sensitive adhesive strip specimens under investigation, with dimensions of 20 mm50 mm, are lined by lamination over the whole area, without air bubbles, with a PET film 23 m thick, after which the second side of the adhesive-sheet strip is lined at one end with a film strip approximately 10 mm long, to produce at this end a grip tab region which is nonpressure-sensitively adhesive on both sides. Thereafter, the adhesive-sheet strip under test is adhered by its facing side, with gentle applied finger pressure, to the test substrate (coated woodchip wallpaper: wallpaper=Erfurt Krnung 52, color=alpina white, wallpaper bonded to chipboard panel). The specimens are then pressed for 10 seconds under an applied pressure of 100 N per 10 cm.sup.2 of pressure-sensitive adhesive surface, followed by conditioning at 40 C. for 15 minutes. The test panels are subsequently fixed horizontally, with the grippable region of the adhesive strips pointing downward. A clip (20 g) is used to fasten a weight of 50 g to the nonadhesive grip tab, and so the resulting peeling load (approximately 0.7 N per 20 mm of adhesive-strip width) acts orthogonally to the bond plane. After 15 minutes and after a further 24 hours, a mark is made of the distance traveled in peel by the adhesive strip from the bond substrate from the beginning of the test. The distance between the two marks is reported as peel travel (units: mm per 24 h). For many applications, the lower the peel travel, the better.

Test CStripping Force

[0138] For the determination of the detachment force (stripping force), a sheet of adhesive with dimensions of 50 mm*20 mm (length*width), with nonpressure-sensitively adhesive grip tab region at the top end, is bonded centrally between two steel plates (arranged congruently to one another) with dimensions of 50 mm30 mm. The specimens thus obtained are pressed on with a force of 500 N for 5 seconds, after which they are left in the unloaded state for 5 minutes. The steel plates each have a bore at their bottom end to accommodate an S-shaped steel hook. The bottom end of the steel hook carries a further steel plate, which allows the test arrangement to be fixed for measurement in the lower jaw of a tensile testing machine. The bonds are stored at +40 C. for 24 hours. After reconditioning to RT, the adhesive-sheet strip is removed at a pulling speed of 1000 mm/min parallel to the bond plane and without contact with the edge regions of the two steel plates. During this procedure, the required detachment force in N is recorded. The parameter reported is the maximum of the stripping stress values in N/cm.

Test DUV Resistance

[0139] In order to test the UV resistance, 10 adhesive strips of each sheet of adhesive under test, in dimensions of 20 mm50 mm, provided at one end on both sides with a nonpressure-sensitively adhesive grip tab region (obtained by laminating application of 25 m-thick, biaxially oriented polyester film of dimensions 20 mm13 mm), are bonded between two glass plates. The bond is made such that the grip tab protrudes from the bondline by 10 mm. Prior to the application of the second glass plate, each adhesive strip is pressed on with a force of 100 N. The adhesive strips are then irradiated for seven days with a sunlight lamp (Osram Ultra Vitalux 300 W) through the glass plate from a distance of 80 cm. The test temperature is 25 C. After the seven day storage, the adhesive strips are parted by pulling, with pulling taking place at an angle of 15. The number of torn adhesive strips is recorded. The result is reported in % torn adhesive strips.

Test EColor Value b*

[0140] The procedure is as per DIN 6174, and the color characteristics are investigated in the CIELab three-dimensional space, formed by the three color parameters L*, a* and b*. This is done using a BYK Gardener spectro-guide instrument, equipped with a D/65 lamp. Within the CIELab system L* indicates the gray value, a* the color axis from green to red, and b* the color axis from blue to yellow. The positive value range for b* indicates the intensity of the yellow color component. A white ceramic tile with a b* of 1.68 was used as reference. This tile also serves as a sample holder, onto which the adhesive layer under test is laminated. Colorimetry takes place on the pure adhesive layer at a thickness of 650 m in each case, after the adhesive layer has been freed from the release liners.

Test FHaze (Large-Angle Scattering), Transmission

[0141] The transparency or degree of transmittance, occasionally also referred to merely as transmission for short, and expressed generally in %, is the ratio of the luminous power arriving at the reverse face of a body through which light is irradiated, to the luminous power incident on the front face. Transmission is curtailed by reflection and possibly absorption.

[0142] The equation is therefore as follows: transmittance=(1reflectanceabsorptance). Transmission and haze are determined in accordance with ASTM D1003 on a haze-gard plus from Byk-Gardner. The procedure for this was that of ASTM D1003.

[0143] For the measurement of large-angle scattering and transmission, the adhesive strip is first adhered without bubbles to a glass microscopy slide precleaned with isopropanol (VWR, ECN 631-1552, #201107). Thereafter a PET film 50 m thick (Melinex 401, DuPont Teijin Films) is laminated on using a manual roller, with strict attention paid to absence of bubbles and absence of dust. The resulting laminate is stored at 60 C. for 3 days and then subjected to measurement.

Test GMolecular Weight Determination

[0144] The weight-average molecular weight M.sub.w was determined by gel permeation chromatography (GPC). The eluent used was THF, measurement took place at 23 C. The precolumn used was PSS-SDV, 5 , 10.sup.3 , ID 8.0 mm50 mm. Separation took place using the columns PSS-SDV, 5 , 10.sup.3 and also 10.sup.4 and 10.sup.6 each with ID 8.0 mm300 mm. The sample concentration was 4 g/l, the flow rate 1.0 ml per minute. Measurement took place against PS standards. (=m; 1 =10.sup.10 m).

Test HTackifier Resin Softening Temperature

[0145] The tackifier resin softening temperature is carried out according to the relevant methodology, which is known as Ring & Ball and is standardized according to ASTM E28.

Test IOzone Resistance

[0146] A suitable pen is used to mark two parallel lines 6 cm apart on a stoneware tile (V&B Fliesen GmbH, Rotensteiner Weg, 66663 Merzig, article No. 1106TW02). Thereafter a distance of 3 cm in length is drawn in on a sheet of adhesive with dimensions of 50 mm20 mm (lengthwidth) in the longitudinal direction. The adhesive sheet is then stretched to exactly twice its length and in the extended condition is fixed on the stoneware tile in such a way that the markings on adhesive sheet and tile overlap. The adhesive film is lined with release foil and pressed on the tile with a 2 kg roller-applied weight, so that the tension of the adhesive sheet is retained. The sample has its liner removed again, and is then stored open for 72 hours at 25 C. and an ozone concentration of 50 pphm in an ozone test chamber (conditioning chamber WK3-180/0 from Weiss Unwelttechnik GmbH with ozone testing unit SIM 6000 from Anseros Klaus Nonnenmacher GmbH). When the storage time is over, the specimens are evaluated under a direct light microscope (magnification factor 6.5). Border specimens are shown in FIG. 7.

[0147] The specimens are considered ozone-resistant if there is no perceptible damage (cracks, holes, clouding) of the specimen. Appearance of this kind is shown in FIG. 1a.

Test JDMA

[0148] The dynamic glass transition temperature data are based on the determination by means of dynamic-mechanical analysis (DMA) at low frequencies (frequency sweep; measuring range: 0.01 to 512 rad/s; temperature: 25 C.; deformation 1%; Rheometric ARES class; parallel plate arrangement, sample thickness 1 mm: sample diameter 25 mm: measuring head: 2000 g spring-mounted with standard force (2 k Bendix)).

Test KMelt Viscosity

[0149] For the determination of the melt viscosity of the plasticizing resins, a shear stress sweep was carried out in a shear stress-controlled DSR 200 N rheometer from Rheometrics Scientific, in rotation. A cone/plate measuring system with a diameter of 25 mm (cone angle 0.1002 rad) was employed; the measuring head was air-mounted and suitable for standard force measurements. The slot was 0.053 mm and the measuring temperature 25 C. The frequency was varied from 0.002 Hz to 200 Hz, and the melt viscosity at 1 Hz was recorded.

Test LDSC

[0150] The glass transition temperature of polymer blocks in block copolymers was determined by means of dynamic scanning calorimetry (DSC). For this purpose about 5 mg of the untreated block copolymer samples were weighed into an aluminum crucible (volume 25 l) and closed with a perforated lid. For the measurement, a DSC 204 F1 from Netzsch was used, and was operated under nitrogen for inertization. The sample was cooled first to 150 C., then heated at a heating rate of 10 K/min up to +150 C., and cooled again to 150 C. The subsequent second heating curve was run again at 10 K/min and the change in the heat capacity was recorded. Glass transitions are identified as steps in the thermogram. The glass transition temperature is evaluated as follows (see FIG. 6). A tangent is applied in each case to the baseline of the thermogram before {circle around (1)} and after {circle around (2)} of the step. In the region of the step, a balancing line {circle around (5)} is placed parallel to the ordinate in such a way that it intersects the two tangents, specifically so as to form two areas {circle around (3)} and {circle around (4)} of equal content (between each tangent, the balancing line, and the measuring plot). The point of intersection of the balancing lines thus positioned with the measuring plot gives the glass transition temperature.

EXAMPLES

[0151] In the text below, the invention is elucidated in more detail by a number of examples.

Preparation of Specimens

[0152] All of the kneading compounds were produced in a Kupper model III-P1 heatable double-sigma kneader from Aachener Maschinenbau. The jacket of the kneader was heated by a thermal oil heating bath from Lauda. A bath temperature of 190 C. was set here. Throughout the kneading operation, there was an inert gas atmosphere of CO.sub.2. The kneader was operated at 50 rpm.

[0153] First of all the elastomers were weighed out together with the solid aging inhibitors Irganox 3052 and Irgafos 168 (if present in the particular formula), and charged to the kneader. Thereafter about 10% of the amount of solid resin was added, and kneading took place for 15 minutes. Subsequently, at intervals of 10 minutes, one third each of the remaining amount of tackifying resin 1, tackifying resin 2 (if present in the particular formula), plasticizing resin, and the liquid aging inhibitors and/or light stabilizers (Weston 399 and Tinuvin products, respectively) were added and incorporated.

[0154] After the end of the kneading operation, the kneading compounds were taken from the kneader and allowed to cool to room temperature.

[0155] The cooled compositions were placed between two plies of siliconized release paper and pressed to hand specimens with a layer thickness of 650 m, using a hot press from Lauffer GmbH & CO KG, model RLKV 25, at 130 C.

Example 1Comparative

[0156]

TABLE-US-00003 wt. % Elastomer Kraton D1165 PT polystyrene-polyisoprene 24.00% block copolymer Tackifying Dercolyte A115 nonhydrogenated 47.00% resin 1 hydrocarbon resin Tackifying -/- resin 2 Plasticizing Wingtack 10 aliphatic hydrocarbon resin 3.50% resin Further Kraton D1102 CS polystyrene-polybutadiene 24.00% constituents block copolymer Tinuvin 571 0.50% Irganfos 168 0.50% Irganox 3052 0.50%

Example 2Comparative

[0157]

TABLE-US-00004 wt. % Elastomer Kraton D1102 CS polystyrene-polybutadiene 39.00% block copolymer Tackifying Dercolyte A115 nonhydrogenated 45.00% resin 1 hydrocarbon resin Tackifying -/- resin 2 Plasticizing Wingtack 10 aliphatic hydrocarbon resin 4.50% resin Further Kraton D1118 CS polystyrene-polybutadiene 10.00% constituents block copolymer Tinuvin 571 UV stabilizer 0.50% Weston 399 antioxidant 0.50% Irganox 3052 antioxidant 0.50%

Example 3Comparative

[0158]

TABLE-US-00005 wt. % Elastomer Kraton D1102 CS polystyrene-polybutadiene 38.00% block copolymer Tackifying Sukorez SU110 fully hydrogenated 23.50% resin 1 hydrocarbon resin Tackifying Sukorez SU100 fully hydrogenated 23.50% resin 2 hydrocarbon resin Plasticizing Wingtack 10 aliphatic hydrocarbon resin 3.50% resin Further Kraton D1118 CS polystyrene-polybutadiene 10.00% constituents block copolymer Tinuvin 571 UV stabilizer 0.50% Tinuvin 765 antioxidant 0.50% Irganox 3052 antioxidant 0.50%

Example 4Comparative

[0159]

TABLE-US-00006 wt. % Elastomer Kraton D1102 CS polystyrene-polybutadiene 39.00% block copolymer Tackifying Regalite R1100 fully hydrogenated 30.00% resin 1 hydrocarbon resin Tackifying Foral AX fully hydrogenated rosin 16.00% resin 2 Plasticizing Wingtack 10 aliphatic hydrocarbon resin 3.50% resin Further Kraton D1118 CS polystyrene-polybutadiene 10.00% constituents block copolymer Tinuvin 571 UV stabilizer 0.50% Tinuvin 765 antioxidant 0.50% Irganox 3052 antioxidant 0.50%

Example 5Inventive

[0160]

TABLE-US-00007 wt. % Elastomer Kraton D1102 CS polystyrene-polybutadiene 38.00% block copolymer Tackifying Regalite R7100 partially hydrogenated 32.00% resin 1 hydrocarbon resin Tackifying Piccolyte A115 nonhydrogenated 15.00% resin 2 hydrocarbon resin Plasticizing Wingtack 10 aliphatic hydrocarbon resin 3.50% resin Further Kraton D1118 CS polystyrene-polybutadiene 10.00% constituents block copolymer Tinuvin 571 UV stabilizer 0.50% Tinuvin 765 antioxidant 0.50% Irganox 3052 antioxidant 0.50%

Example 6Inventive

[0161]

TABLE-US-00008 wt. % Elastomer Kraton D1102 CS polystyrene-polybutadiene 38.00% block copolymer Tackifying Regalite R7100 partially hydrogenated 37.00% resin 1 hydrocarbon resin Tackifying Regalite S5090 partially hydrogenated 10.00% resin 2 hydrocarbon resin Plasticizing Wingtack 10 aliphatic hydrocarbon resin 3.50% resin Further Kraton D1118 CS polystyrene-polybutadiene 10.00% constituents block copolymer Tinuvin 571 UV stabilizer 0.50% Tinuvin 765 antioxidant 0.50% Irganox 3052 antioxidant 0.50%

Example 7Comparative

[0162]

TABLE-US-00009 wt. % Elastomer Kraton D1102 CS polystyrene-polybutadiene 30.00% block copolymer Tackifying Ragalite R7100 partially hydrogenated 47.00% resin 1 hydrocarbon resin Tackifying Arkon M90 partially hydrogenated 13.00% resin 2 hydrocarbon resin Plasticizing Wingtack 10 aliphatic hydrocarbon resin 3.50% resin Further Kraton D1118 CS polystyrene-polybutadiene 5.00% constituents block copolymer Tinuvin 571 UV stabilizer 0.50% Tinuvin 765 antioxidant 0.50% Irganox 3052 antioxidant 0.50%

Example 8Comparative

[0163]

TABLE-US-00010 wt. % Elastomer Kraton D1118 CS polystyrene-polybutadiene 98.50% block copolymer Tackifying -/- resin 1 Tackifying -/- resin 2 Plasticizing -/- resin Further Tinuvin 571 UV stabilizer 0.50% constituents Tinuvin 765 antioxidant 0.50% Irganox 3052 antioxidant 0.50%

Example 9Comparative

[0164]

TABLE-US-00011 wt. % Elastomer Kraton D1165 PT polystyrene-polyisoprene 98.50% block copolymer Tackifying -/- resin 1 Tackifying -/- resin 2 Plasticizing -/- resin Further Tinuvin 571 UV stabilizer 0.50% constituents Tinuvin 765 antioxidant 0.50% Irganox 3052 antioxidant 0.50%

Example 10Comparative

[0165]

TABLE-US-00012 wt. % Elastomer Kraton D1102 CS polystyrene-polybutadiene 98.50% block copolymer Tackifying -/- resin 1 Tackifying -/- resin 2 Plasticizing -/- resin Further Tinuvin 571 UV stabilizer 0.50% constituents Tinuvin 765 antioxidant 0.50% Irganox 3052 antioxidant 0.50%

Measurement Values

[0166]

TABLE-US-00013 Tip-shear holding Peel Stripping UV Color tan 25 C., tan 25 C., Ozone Example power rate test resistance Haze Transmission value b* 10 rad/s 100 rad/s resistance #1 >18 4 11 90% 5.25 90.0 16.14 0.73 1.55 Slight damage #2 >18 8 10 0% 3.20 90.0 13.11 0.49 1.15 No damage #3 >18 >40 8 0% 5.55 90.5 2.33 0.25 0.53 No damage #4 >18 14 8 60% 3.39 91.0 4.17 0.17 0.30 Massive damage #5 >18 11 11 0% 5.78 89.7 3.98 0.26 0.65 No damage #6 >18 15 11 10% 3.82 90.9 3.17 0.24 0.45 No damage #7 2 6 x x 17.97 90.7 2.09 0.22 0.42 Slight damage #8 x x x x x x x 0.11 0.11 Massive damage #9 x x x x x x x 0.08 0.08 Massive damage #10 x x x x x x x 0.06 0.06 Massive damage