# US 11,897,994 B2 · Urethane resin composition and moisture-permeable film

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- Number: US 11,897,994 B2
- Document ID: US11897994B2
- Status: Granted
- Kind: B2
- Application number: 17/639,590
- Filed: 2020-08-20
- Published: 2022-09-22
- Granted: 2024-02-13
- Earliest claimed: 2019-09-06
- Assignees: DIC Corporation
- Applicants: DIC Corporation
- Inventors: Kunihiko Komatsuzaki; Yoshinori Kanagawa
- Web page: https://patentgrep.com/patent/US11897994B2

## CPC

- C08G 18/4238: {derived from dicarboxylic acids and dialcohols}
- C08J 5/18: Manufacture of films or sheets
- C08G 18/0852: {the solvents being organic}
- C08G 18/3206: {aliphatic}
- C08G 18/4833: {Polyethers containing oxyethylene units}
- C08G 18/6637: {with compounds of group C08G18/32 or polyamines of C08G18/38}
- C08G 18/7671: {containing only one alkylene bisphenyl group}
- C08G 18/7692: {containing at least one isocyanate or isothiocyanate group linked to an aromatic ring by means of an aliphatic group}
- C08J 2375/06: from polyesters
- C08J 2375/08: from polyethers
- C08L 2203/16: used for films
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON 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)
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)

## Abstract

An object of the invention is to provide a urethane resin composition containing a biomass raw material and having excellent moisture permeability and excellent film strength. The invention provides a urethane resin composition containing a urethane resin (X), the urethane resin (X) containing, as essential raw materials, a polyol (A) that contains a polyol (a1) having an oxyethylene group, and a polyisocyanate (B), in which the polyol (A) further contains a polyester polyol (a2) containing a biomass-derived glycol (i) and a crystalline polybasic acid (ii) as raw materials, and the polyol (A) has a hydroxyl equivalent in a range of 400 g/eq to 600 g/eq. In addition, the invention provides a moisture-permeable film which is formed of the urethane resin composition.

## Claims

### Claim 1

A urethane resin composition comprising:
a urethane resin (X) containing, as essential raw materials, a polyol (A) that contains a polyol (al) having an oxyethylene group, and a polyisocyanate (B), wherein
the polyol (A) further contains a polyester polyol (a2) containing a biomass-derived glycol (i) and a crystalline polybasic acid (ii) as raw materials,
the polyol (A) further contains a chain extender (a3), and
the polyol (A) has a hydroxyl equivalent in a range of 400 g/eq to 600 g/eq,
an amount of the polyol (a1) having an oxyethylene group is in a range of 10% by mass to 30% by mass in a total amount of the raw materials constituting the urethane resin (X),
an amount of the polyester polyol (a2) is a the range of 40% by mass to 70% by mass in the total amount of the raw materials constituting the urethane resin (X),
an amount of the chain extender (a3) is in a range of 2% by mass to 6% by mass in the total amount of the raw materials constituting the urethane resin (X),
an amount of the polyisocyanate (B) is in a range of 15% by mass to 25% by mass in the total amount of the raw materials constituting the urethane resin (X).

### Claim 2 (depends on 1)

The urethane resin composition according to claim 1, wherein the biomass-derived glycol (i) is 1,3-propanediol and/or 1,4-butanediol.

### Claim 3 (depends on 1)

The urethane resin composition according to claim 1, wherein the crystalline polybasic acid (ii) is derived from a biomass.

### Claim 4 (depends on 3)

The urethane resin composition according to claim 3, wherein the biomass-derived crystalline polybasic acid is one or more compounds selected from the group consisting of sebacic acid, succinic acid, 1,10-decanedicarboxylic acid, and 1,12-dodecanedicarboxylic acid.

### Claim 5 (depends on 1)

The urethane resin composition according to claim 1, which has a biomass degree of 50% or more.

### Claim 6 (depends on 1)

A moisture-permeable film comprising:
the urethane resin composition according to claim 1.