# US 10,865,302 B2 · Resin composition and use thereof

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- Number: US 10,865,302 B2
- Document ID: US10865302B2
- Status: Granted
- Kind: B2
- Application number: 16/070,586
- Filed: 2017-01-10
- Published: 2019-02-07
- Granted: 2020-12-15
- Earliest claimed: 2016-01-29
- Assignees: Zeon Corporation
- Applicants: Zeon Corporation
- Inventors: Hiromu Mashima; Takamichi Inomata
- Web page: https://patentgrep.com/patent/US10865302B2

## CPC

- C08L 53/025: {modified}
- B29C 55/04: uniaxial, e.g. oblique
- C08F 8/04: Reduction, e.g. hydrogenation
- C08F 297/046: {polymerising vinyl aromatic monomers and isoprene, optionally with other conjugated dienes}
- C08J 5/18: Manufacture of films or sheets
- C08K 5/0016: {Plasticisers}
- C08K 5/01: Hydrocarbons {(C08K5/0091 takes precedence)}
- C08K 5/10: Esters; Ether-esters
- G02B 5/3033: {in the form of a thin sheet or foil, e.g. Polaroid}
- C08F 2810/20: leading to a crosslinking, either explicitly or inherently
- C08J 2353/02: of vinyl aromatic monomers and conjugated dienes
- C08L 2203/16: used for films
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)
- B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00)
- C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08J: WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H (working, e.g. shaping, of plastics B29)
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS

## Abstract

A resin composition including a hydrogenated block copolymer product [D] and a plasticizer, wherein: the hydrogenated product [D] is a hydrogenated product obtained by hydrogenating a block copolymer [C] composed of a polymer block [A] containing a repeating unit [I] derived from an aromatic vinyl compound as a main component, and a polymer block [B] containing the repeating unit [I] derived from an aromatic vinyl compound and a repeating unit [II] derived from a chain conjugated diene compound as main components; a ratio of the block [A] and the block [B], and a ratio of the unit [I] and the unit [II] are in specific ranges, and, in the hydrogenated product [D], 90% or more of all unsaturated bonds in the block copolymer [C] are hydrogenated.

## Claims

### Claim 1

A film formed from a resin composition comprising a hydrogenated block copolymer product [D] and a plasticizer, wherein:
the hydrogenated block copolymer product [D] is a hydrogenated block copolymer product obtained by hydrogenating a block copolymer [C], the block copolymer [C] being composed of
a polymer block [A] containing a repeating unit [I] derived from an aromatic vinyl compound as a main component, and
a polymer block [B] containing the repeating unit [I] derived from an aromatic vinyl compound and a repeating unit [II] derived from a chain conjugated diene compound as main components;
(i) a ratio (wA/wB) of wA to wB is 45/55 to 85/15 where the wA is a weight fraction of the polymer block [A] in the block copolymer block [C] and the wB is a weight fraction of the polymer block [B] in the block copolymer block [C];
(ii) a ratio (w[IB]/w[IIB]) of w[IB] to w[IIB] is 40/60 to 55/45 where the w[IB] is a weight fraction of the repeating unit [I] in the polymer block [B] and the w[IIB] is a weight fraction of the repeating unit [II] in the polymer block [B]; and
(iii) in the hydrogenated block copolymer product [D], 90% or more of all unsaturated bonds in the block copolymer [C] are hydrogenated; and
the film is a stretched film having Re of 20 nm or less, and Rth of −10 nm or more and 10 nm or less.

### Claim 2 (depends on 1)

The film according to claim 1, wherein the resin composition has a heat deformation temperature of 115° C. or lower.

### Claim 3 (depends on 1)

The film according to claim 1, wherein the plasticizer is an ester-based plasticizer, an aliphatic hydrocarbon-based polymer or a mixture thereof.

### Claim 4 (depends on 1)

The film according to claim 1, wherein a birefringence is 0.001 or less, the birefringence being expressed by subjecting the film to a free-end uniaxial stretching at a temperature in a range of 50° C. to 100° C. and a stretching ratio in a range of 1.2 to 6.0.

### Claim 5 (depends on 1)

The film according to claim 1, wherein a maximum tension is 10 N/10 mm or less, the maximum tension being caused by subjecting the film to a free-end uniaxial stretching at a temperature in a range of 50° C. to 100° C. and a stretching ratio in a range of 1.2 to 6.0.

### Claim 6

A polarizing plate comprising a film as a protective film, the film being formed from a resin composition comprising a hydrogenated block copolymer product [D] and a plasticizer, wherein:
the hydrogenated block copolymer product [D] is a hydrogenated block copolymer product obtained by hydrogenating a block copolymer [C], the block copolymer [C] being composed of
a polymer block [A] containing a repeating unit [I] derived from an aromatic vinyl compound as a main component, and
a polymer block [B] containing the repeating unit [I] derived from an aromatic vinyl compound and a repeating unit [II] derived from a chain conjugated diene compound as main components;
(i) a ratio (wA/wB) of wA to wB is 45/55 to 85/15 where the wA is a weight fraction of the polymer block [A] in the block copolymer block [C] and the wB is a weight fraction of the polymer block [B] in the block copolymer block [C];
(ii) a ratio (w[IB]/w/[IB]) of w[IB] to w[IIB] is 40/60 to 55/45 where the w[IB] is a weight fraction of the repeating unit [I] in the polymer block [B] and the w[IIB] is a weight fraction of the repeating unit [II] in the polymer block [B]; and
(iii) in the hydrogenated block copolymer product [D], 90% or more of all unsaturated bonds in the block copolymer [C] are hydrogenated.

### Claim 7 (depends on 6)

The polarizing plate according to claim 6, wherein the resin composition has a heat deformation temperature of 115° C. or lower.

### Claim 8 (depends on 6)

The polarizing plate according to claim 6, wherein the plasticizer is an ester-based plasticizer, an aliphatic hydrocarbon-based polymer or a mixture thereof.

### Claim 9 (depends on 6)

The polarizing plate according to claim 6, wherein the film is a stretched film.

### Claim 10 (depends on 6)

The polarizing plate according to claim 6, wherein a birefringence of the film is 0.001 or less, the birefringence being expressed by subjecting the film to a free-end uniaxial stretching at a temperature in a range of 50° C. to 100° C. and a stretching ratio in a range of 1.2 to 6.0.

### Claim 11 (depends on 6)

The polarizing plate according to claim 6, wherein a maximum tension of the film is 10 N/10 mm or less, the maximum tension being caused by subjecting the film to a free-end uniaxial stretching at a temperature in a range of 50° C. to 100° C. and a stretching ratio in a range of 1.2 to 6.0.