# US 10,308,751 B2 · Block copolymer

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- Number: US 10,308,751 B2
- Document ID: US10308751B2
- Status: Granted
- Kind: B2
- Application number: 14/915,107
- Filed: 2014-09-01
- Published: 2016-07-21
- Granted: 2019-06-04
- Earliest claimed: 2013-08-30
- Assignees: LG Chem, Ltd.
- Applicants: LG Chem, Ltd.
- Inventors: Jeong Ae Yoon; Su Jeong Kim; Sung Soo Yoon; Min Ki Lee; Kee Young Kim; Han Na Chi; Sang Hyun Hong; Jeong Sik Bae
- Web page: https://patentgrep.com/patent/US10308751B2

## CPC

- C08F 220/1804: {C4-(meth)acrylate, e.g. butyl (meth)acrylate, isobutyl (meth)acrylate or tert-butyl (meth)acrylate}
- C08F 293/00: Macromolecular compounds obtained by polymerisation on to a macromolecule having groups capable of inducing the formation of new polymer chains bound exclusively at one or both ends of the starting macromolecule (on to polymers modified by introduction of unsaturated end groups C08F290/02)
- C08F 293/005: {using free radical "living" or "controlled" polymerisation, e.g. using a complexing agent}
- C08J 5/18: Manufacture of films or sheets
- C09D 153/00: Coating compositions based on block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Coating compositions based on derivatives of such polymers
- C09J 7/24: based on macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
- C09J 153/00: Adhesives based on block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Adhesives based on derivatives of such polymers
- C09J 153/005: {Modified block copolymers}
- C08F 2438/01: Atom Transfer Radical Polymerization [ATRP] or reverse ATRP
- C08J 2353/00: Characterised by the use of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers
- C09J 2301/302: the adhesive being pressure-sensitive, i.e. tacky at temperatures inferior to 30°C
- C09J 2433/006: in the substrate
- C09J 2453/00: Presence of block copolymer
- 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)
- C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D)
- C09J: ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES (preparation of glue or gelatine C09H)

## Abstract

A block copolymer, a method for preparing a block copolymer, a resin composition, and a film are provided. The block copolymer can be useful in inhibiting complete separation of the hard segment even under a severe high-temperature condition by increasing the chemical cross-linking density around the hard segment without causing an increase in glass transition temperature of the hard segment, thereby maintaining high-temperature durability.

## Claims

### Claim 1

A cured product of a curable resin composition, wherein the curable resin composition comprises a block copolymer comprising:
a hard segment having a glass transition temperature of 25° C. or more; and
a soft segment having a glass transition temperature of 10° C. or less,
wherein the soft segment comprises a polymerization unit derived from a cross-linkable monomer, and
the polymerization unit derived from the cross-linkable monomer has a higher concentration in a region adjacent to the hard segment than in a region which is not adjacent to the hard segment,
wherein the cured product of the curable resin composition has a phase-separated structure comprising a shell layer and a spherical domain, wherein the shell layer comprises the soft-segment, and the spherical domain comprises the hard segment, and the shell layer has a higher cross-linking density in a region adjacent to the hard segment than in a region which is not adjacent to the hard segment.

### Claim 2 (depends on 1)

The cured product of claim 1, wherein the hard segment comprises a polymerization unit derived from a methacrylic monomer.

### Claim 3 (depends on 1)

The cured product of claim 1, wherein the soft segment comprises polymerization units derived from an acrylic monomer and a cross-linkable monomer.

### Claim 4 (depends on 1)

The cured product of claim 1, wherein the glass transition temperature of the hard segment is in a range of 30° C. to 200° C.

### Claim 5 (depends on 1)

The cured product of claim 1, wherein the glass transition temperature of the soft segment is in a range of −80° C. to 0° C.

### Claim 6 (depends on 1)

The cured product of claim 1, wherein the cross-linkable monomer comprises at least one functional group selected from the group consisting of a hydroxyl group, a carboxyl group, an epoxy group, a glycidyl group, an isocyanate group, an amide group, an amino group, and an alkoxysilyl group.

### Claim 7 (depends on 1)

The cured product of claim 1, wherein the content of the hard segment is in a range of 5 to 25% by weight, based on the total weight of the block copolymer.

### Claim 8 (depends on 1)

The cured product of claim 1, which has a number average molecular weight of 5,000 to 500,000.

### Claim 9 (depends on 1)

The cured product of claim 1, which has a molecular weight distribution of greater than 1 and 3 or less.

### Claim 10 (depends on 1)

A film comprising the cured product of claim 1.

### Claim 11 (depends on 10)

The film of claim 10, wherein the film is a pressure-sensitive adhesive film.