# US 10,870,755 B2 · Method for producing thermoplastic aromatic polysulfone resin, method for producing epoxy composition, and method for producing cured epoxy product

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- Number: US 10,870,755 B2
- Document ID: US10870755B2
- Status: Granted
- Kind: B2
- Application number: 15/778,282
- Filed: 2016-09-14
- Published: 2018-12-06
- Granted: 2020-12-22
- Earliest claimed: 2015-12-02
- Assignees: Sumitomo Chemical Company, Limited
- Applicants: Sumitomo Chemical Company, Limited
- Inventors: Tomokazu Yasunaga; Shinji Ohtomo; Toshiaki Sugimura
- Web page: https://patentgrep.com/patent/US10870755B2

## CPC

- C08L 63/00: Compositions of epoxy resins; Compositions of derivatives of epoxy resins
- C08G 59/62: Alcohols or phenols
- C08G 59/621: {Phenols}
- C08G 65/40: from phenols (I) and other compounds (II), e.g. OH-Ar-OH + X-Ar-X, where X is halogen atom, i.e. leaving group
- C08G 65/4056: {(I) or (II) containing sulfur (as the sulfone group C08G75/23)}
- C08G 75/23: Polyethersulfones
- C08J 3/11: from solid polymers
- C08J 3/24: Crosslinking, e.g. vulcanising, of macromolecules (mechanical aspects B29C35/00; crosslinking agents C08K)
- C08L 81/06: Polysulfones; Polyethersulfones
- C08J 2363/00: Characterised by the use of epoxy resins; Derivatives of epoxy resins
- C08J 2481/06: Polysulfones; Polyethersulfones
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)
- 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)

## Abstract

The present invention relates to a method for producing thermoplastic aromatic polysulfone resin, in which a polymerization reaction is performed in an organic solvent by using compound (A), a dihalogeno compound represented by Formula (I), compound (B), a divalent phenol represented by Formula (II), and compound (C), an alkali metal carbonate, at a charging molar ratio satisfying the following Formulae (1) to (3): (1) 0.900<(A)/(B)<0.990; (2) {(A)/(B)}−0.02<(C)/(B)<{(A)/(B)}+0.01; and (3) (C)/(B)<1.00, In Formulae (I) and (II), R1 to R4 represent an alkyl group having 1 to 4 carbon atoms or an alkoxy group having 1 to 4 carbon atoms, X and X′ represent a halogen atom, Y represents one or more groups selected from the group consisting of —SO2—, —C(CH3)2—, —CH2—, —O— and —CO—, or a single bond, and n1, n2, n3 and n4 represent an integer of 0 to 4.

## Claims

### Claim 1

A method for producing thermoplastic aromatic polysulfone resin, comprising:
performing polymerization reaction of compound (A), a dihalogeno compound represented by Formula (I), compound (B), a divalent phenol represented by Formula (II), and compound (C), an alkali metal carbonate, in an organic solvent at a charging molar ratio satisfying the following Formulae (1) to (3):
0.910≤(A)/(B)≤0.962; (1)
{(A)/(B)}−0.02<(C)/(B)<{(A)/(B)}+0.01, and; (2)
(C)/(B)<1.00; (3)
wherein in Formulae (I) and (II), R1 to R4 each independently represents an alkyl group having 1 to 4 carbon atoms or an alkoxy group having 1 to 4 carbon atoms, X and X′ each independently represents a halogen atom, Y represents one or more groups selected from the group consisting of —SO2—, —C(CH3)2—, —CH2—, —O— and —CO—, or a single bond, and n1, n2, n3 and n4 each independently represents an integer of 0 to 4, and in a case where n1, n2, n3 or n4 is an integer of 2 to 4, a plurality of R1, R2, R3 or R4 may be the same as or different from each other.

### Claim 2 (depends on 1)

The method according to claim 1, wherein Formula (1) is 0.910≤(A)/(B)≤0.950.

### Claim 3 (depends on 1)

The method according to claim 1, wherein Formula (1) is 0.910≤(A)/(B)≤0.930.

### Claim 4 (depends on 1)

The method according to claim 1, wherein n1 to n4 are 0.

### Claim 5 (depends on 1)

The method according to claim 1, wherein X and X′ are chlorine atoms.

### Claim 6 (depends on 1)

The method according to claim 1, wherein the organic solvent is a polar organic solvent.