# US 5,703,167 A · Modifier for resin and rubber

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- Number: US 5,703,167 A
- Document ID: US5703167A
- Status: Granted
- Kind: A
- Application number: 08/818,383
- Filed: 1997-03-14
- Granted: 1997-12-30
- Earliest claimed: 1993-12-24
- Assignees: Marubishi Oil Chemical Co., Ltd.; Sumitomo Chemical Company, Limited
- Inventors: Tadayuki Ohmae; Haruhiko Hisada; Kenichi Hosoda; Masahide Yoshiya; Yoshiyuki Komori; Noboru Yamaguchi; Tohru Fujiki; Noriyasu Yasuda
- Web page: https://patentgrep.com/patent/US5703167A

## CPC

- C08G 81/025: {containing polyether sequences}
- C08L 101/00: Compositions of unspecified macromolecular compounds
- C08L 87/00: Compositions of unspecified macromolecular compounds, obtained otherwise than by polymerisation reactions only involving unsaturated carbon-to-carbon bonds
- C08L 2201/04: Antistatic
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)

## Abstract

A modifier for resin and rubber of which an active ingredient is a reaction product of a styrene-maleic anhydride copolymer (A) with a poly(alkylene oxide) monoalkyl ether (B), and/or a metal salt thereof, which modifier improves processability and properties of resins or rubbers. For example, the modifier provides resins or rubbers with antistatic properties. It also enhances the dispersibility of additives, e.g., a flame retardant or fillers incorporated in the resin or the rubber, and provides resins or rubbers with, for example, excellent flame retardancy and prevents the additive or the filler from blooming.

## Claims

### Claim 1

A process for producing a thermoplastic resin composition which comprises a thermoplastic resin and a modifier comprising a reaction product of (A) a styrene copolymer having a number average molecular weight of 1000 to 4000 and a copolymerization ratio of styrene to maleic anhydride of 1:1 to 5:1 in moles, with (B) poly(alkylene oxide) monoalkyl ether having a number average molecular weight of 100 to 5000, the amount of the modifier being 0.1 to 25% by weight based on the weight of the thermoplastic resin, which process comprises a step of melt-kneading the modifier with the thermoplastic resin.

### Claim 2

A process for producing a rubber composition which comprises a rubber and a modifier comprising a reaction product of (A) a styrene copolymer having a number average molecular weight of 1000 to 4000 and a copolymerization ratio of styrene to maleic anhydride of 1:1 to 5:1 in moles, with (B) poly(alkylene oxide) monoalkyl ether having a number average molecular weight of 100 to 5000, the amount of the modifier being 0.1 to 25% by weight based on the weight of the rubber, which process comprises a step of melt-kneading the modifier with the rubber.

### Claim 3 (depends on 1)

A process according to claim 1 wherein the thermoplastic resin is a homopolymer or copolymer of olefin or an olefinic polymer.

### Claim 4 (depends on 1)

A process according to claim 1 wherein the thermoplastic resin is a homopolymer or copolymer of an alkyl ester of an unsaturated carboxylic acid.

### Claim 5 (depends on 1)

A process according to claim 1 wherein the thermoplastic resin is a halogen-containing resin, a homopolymer or copolymer of styrenic monomers or a vinyl aromatic polymer.

### Claim 6 (depends on 1)

A process according to claim 1 wherein the thermoplastic resin is polyphenylene ether, polyethylene terephthalate, polybutylene terephathalate, polyamide, polycarbonate, polyacetal, polysulfone, polyether sulfone, polyphenylene sulfide, polyarylate, polyphenylene ether/rubber modified polystyrene alloy, polyphenylene ether/polyamide alloy, polycarbonate/ABS alloy, polycarbonate/polybutylene terephthalate alloy, polypropylene/polyamide alloy, or polypropylene/polybutylene terephthalate alloy.

### Claim 7 (depends on 2)

A process according to claim 2 wherein the rubber is natural rubbers, ethylene-.alpha.-olefin copolymer rubber, isoprene rubber, isoprene-isobutylene copolymer rubber, styrene-butadiene copolymer rubber, chloroprene rubber, epichlorohydrin rubber, or acrylonitrile-butadiene copolymer rubber.