Cheil Industries Inc.

Gyu-Cheol Lee

Bok-Nam Jang

Young-Kil Chang

Se-Jong Kim

Jung-Hyun Kim

Sang-Hyun Hong

Byeong-do Lee

Yong-Hae Kweon

A flameproof thermoplastic resin composition substantially free of phenolic resin, red phosphorous and silicone resin comprises (A) about 40-95 parts by weight of a rubber modified styrene-containing graft copolymer resin, (B) about 5-60 parts by weight of polyphenylene ether resin; (C) about 5-30 parts by weight of aromatic phosphoric acid ester per 100 part by weight of (A) and (B) wherein the styrene-containing copolymer chains in rubber modified styrene-containing resin (A) comprise

Flameproof styrene-containing graft resin compositions having a particular nitrile content distribution

A flameproof thermoplastic resin composition is substantially free of phenolic resin, red phosphorous and silicone resin and comprises (A) about 40-95 parts by weight of a rubber modified styrene-containing resin comprising (a1) about 20-95% by weight of a styrene-containing graft copolymer resin containing about 19-50% by weight of acrylonitrile in the copolymer excluding rubber and (a2) about 5-80% by weight of a styrene-containing copolymer containing about 19-50% by weight of acrylonitrile; (B) about 5-60 parts by weight of a polyphenylene ether resin; (C) about 2-40 parts by weight of a compatabilizer comprising (c1) a styrene-containing copolymer containing about 5-18% by weight of acrylonitrile in the copolymer per 100 parts by weight of the sum of (A) and (B) or (c2) a styrene-containing graft copolymer having up to about 60% by weight of rubber wherein the compatabilizer contains about 5-18% by weight of acrylonitrile in the copolymer excluding rubber, per 100 parts by weight of the sum of (A) and (B); and (D) about 5-30 parts by weight of an aromatic phosphoric acid ester per 100 parts by weight of the sum of (A) and (B). The physical properties and flame retardance of the resin compositions according to the present invention are adversely affected by the presence of 3% or more by weight of polycarbonate based on the total weight of the composition.

Flameproof styrene containing graft resin compositions substantially free of phenolic resins and containing styrene/acrylonitrile resin compatabilizer

The flameproof thermoplastic resin composition of the present invention comprises (A) 40 to 95 parts by weight of a rubber modified styrene-containing resin composed of (a ) 20 to 100% by weight of a styrene-containing graft copolymer resin including 18 to 50% by weight of acrylonitrile in the copolymer excluding rubber; and (a ) 0 to 80% by weight of a styrene-containing copolymer resin containing 18 to 50% by weight of acrylonitrile; (B) 5 to 60 parts by weight of polyphenylene ether resin; (C) 2 to 40 parts by weight of a styrene-containing copolymer or styrene-containing graft copolymer resin containing 5 to 18% by weight of acrylonitrile per 100 parts by weight of the sum of (A) and (B); and (D) 5 to 30 parts by weight of an aromatic phosphoric acid ester compound per 100 parts by weight of the sum of (A) and (B). The method of preparing the flameproof thermoplastic resin is (i) preparing master batch in the range of 40 to 95 parts by weight of polyphenylene ether (PPE) (B), 5 to 60 parts by weight of styrene-containing graft copolymer resin or styrene-containing copolymer resin having 5 to 18% by weight of acrylonitrile content and 0 to 30 parts by weight of aromatic phosphoric acid ester compound (D) at 250 to 300&deg; C. of molding temperature; and (ii) adding a rubber modified styrene-containing resin (A) and an aromatic phosphoric acid ester compound (D) to the master batch and extruding at 200 to 260&deg; C. of molding temperature to be a final resin comprising 40 to 95 parts by weight of ABS resin, 5 to 60 parts by weight of PPE (B) and 5 to 30 parts by weight of aromatic phosphoric acid ester compound (D).

Method of preparing flameproof thermoplastic resin composition

A flameproof thermoplastic resin composition of the present invention comprises (A) a base resin comprising 40 to 95% by weight of a rubber modified styrene-containing resin (a ) composed of 20 to 100% by weight of a styrene-containing graft copolymer resin (a ) and 0 to 80% by weight of a styrene-containing copolymer resin (a ), and 60 to 5% by weight of polyphenylene ether resin (a ); (B) 2 to 40 parts by weight of a styrene-acrylonitrile copolymer containing 5 to 18% by weight of acrylonitrile per 100 parts by weight of the base resin; (C) 5 to 30 parts by weight of an aromatic phosphoric acid ester compound having a melting point of more than 90&deg; C. per 100 parts by weight of the base resin; and (D) 3 to 30 parts by weight of a phenolic resin per 100 parts by weight of the base resin. The flameproof thermoplastic resin composition may further comprise 0 to 30 parts by weight of an anti-dripping agent, an impact modifier, a plasticizer, a heat stabilizer, an oxidation inhibitor, a light stabilizer, a compatibilizer, pigments, dyes and/or inorganic fillers on the basis of 100 parts by weight of the base resin.

Thermoplastic flameproof resin composition

A flameproof thermoplastic resin composition of the present invention comprises (A) 100 parts by weight of a rubber modified styrene-containing base resin composed of 20&tilde;100% by weight of a styrene-containing graft copolymer resin and 0&tilde;80% by weight of a styrene-containing copolymer resin; (B) 5&tilde;40 parts by weight of a phenolic resin; (C) 3&tilde;40 parts by weight of a PPE resin having a hindered phenolic structure; and (D) 5&tilde;30 parts by weight of an aromatic phosphoric acid ester having a hindered phenolic structure. Said flameproof thermoplastic resin composition may further comprise 0.01&tilde;2.0 parts by weight of a fluorine resin to 100 parts by weight of said rubber modified styrene-containing base resin.

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Kyungki-do, South Korea

Gyu-Cheol Lee