Alkyl acrylate-aromatic vinyl compound-vinyl cyanide compound copolymer with improved low-temperature impact strength and polycarbonate composition comprising the same

Patent metadata

Field	Value
Publication number	US-9790308-B2
Application number	US-201314234304-A
Country	US
Kind code	B2
Filing date	Sep 24, 2013
Priority date	Oct 11, 2012
Publication date	Oct 17, 2017
Grant date	Oct 17, 2017

Abstract

Disclosed are an alkyl acrylate-aromatic vinyl compound-vinyl cyanide compound copolymer which is prepared using a polyalkylene cross-linking agent such as polyethylene glycol diacrylate or polyethylene glycol dimethacrylate for a core of the alkyl acrylate-aromatic vinyl compound-vinyl cyanide compound copolymer and thus advantageously improves low-temperature impact strength of resins when the copolymer is applied to a polycarbonate resin composition, and the polycarbonate resin composition comprising the copolymer.

First claim

What is claimed is:

1. An alkyl acrylate-aromatic vinyl compound-vinyl cyanide compound copolymer comprising:
(A) a seed comprising 4 to 30 parts by weight of at least one selected from the group consisting of an aromatic vinyl compound, a vinyl cyanide compound and alkyl acrylate;
(B) a rubber core surrounding the seed, the rubber core comprising 20 to 80 parts by weight of alkyl acrylate and 0.01 to 3 parts by weight of a polyalkylene glycol-based cross-linking agent; and
(C) a graft shell surrounding the rubber core, the graft shell comprising 10 to 70 parts by weight of at least one selected from the group consisting of an aromatic vinyl compound and a vinyl cyanide compound, and 0.01 to 3 parts by weight of the cross-linking agent,
with respect to 100 parts by weight in total of the alkyl acrylate, the aromatic vinyl compound and the vinyl cyanide compound,
wherein the polyalkylene glycol-based cross-linking agent comprises at least one selected from the group consisting of polyethylene glycol diacrylate, polyethylene glycol dimethacrylate, polypropylene glycol diacrylate and polypropylene glycol dimethacrylate, and
wherein the polyalkylene glycol-based cross-linking agent has a number average molecular weight of 575 to 1,000 g/mol.

2. The alkyl acrylate-aromatic vinyl compound-vinyl cyanide compound copolymer according to claim 1 , wherein at least one of the seed and the core further comprises a grafting agent.

3. The alkyl acrylate-aromatic vinyl compound-vinyl cyanide compound copolymer according to claim 2 , wherein the grafting agent comprises at least one selected from the group consisting of allyl methacrylate, triallyl isocyanurate, triallyl amine and diallyl amine.

4. The alkyl acrylate-aromatic vinyl compound-vinyl cyanide compound copolymer according to claim 2 , wherein the grafting agent is present in an amount of 0.01 to 0.5 parts by weight with respect to 100 parts by weight in total of the alkyl acrylate, the aromatic vinyl compound and the vinyl cyanide compound.

5. The alkyl acrylate-aromatic vinyl compound-vinyl cyanide compound copolymer according to claim 1 , wherein the aromatic vinyl compound comprises at least one selected from the group consisting of styrene, α-methyl styrene, p-methyl styrene and vinyl toluene.

6. The alkyl acrylate-aromatic vinyl compound-vinyl cyanide compound copolymer according to claim 1 , wherein the vinyl cyanide compound comprises at least one selected from the group consisting of acrylonitrile, methacrylonitrile and ethacrylonitrile.

7. The alkyl acrylate-aromatic vinyl compound-vinyl cyanide compound copolymer according to claim 1 , wherein the alkyl acrylate has an alkyl group having 2 to 8 carbon atoms.

8. The alkyl acrylate-aromatic vinyl compound-vinyl cyanide compound copolymer according to claim 1 , wherein the graft shell further comprises a polyalkylene glycol-based cross-linking agent.

9. A polycarbonate resin composition comprising:
1 to 20% by weight of an alkyl acrylate-aromatic vinyl compound-vinyl cyanide compound copolymer; and
80 to 99% by weight of a polycarbonate resin,
wherein the alkyl acrylate-aromatic vinyl compound-vinyl cyanide compound copolymer comprises:
(A) a seed comprising at least one selected from the group consisting of an aromatic vinyl compound, a vinyl cyanide compound and alkyl acrylate;
(B) a rubber core surrounding the seed, the rubber core comprising alkyl acrylate and a polyalkylene glycol-based cross-linking agent; and
(C) a graft shell surrounding the rubber core, the graft shell comprising at least one selected from the group consisting of an aromatic vinyl compound and a vinyl cyanide compound,
wherein the polyalkylene glycol-based cross-linking agent comprises at least one selected from the group consisting of polyethylene glycol diacrylate, polyethylene glycol dimethacrylate, polypropylene glycol diacrylate and polypropylene glycol dimethacrylate, and
wherein the polyalkylene glycol-based cross-linking agent has a number average molecular weight of 575 to 1,000 g/mol.

10. A polycarbonate resin composition comprising:
1 to 20% by weight of Ma an alkyl acrylate-aromatic vinyl compound-vinyl cyanide compound copolymer;
62 to 97% by weight of a polycarbonate resin; and
1 to 20% by weight of an acrylonitrile-styrene copolymer,
wherein the alkyl acrylate-aromatic vinyl compound-vinyl cyanide compound copolymer comprises:
(A) a seed comprising at least one selected from the group consisting of an aromatic vinyl compound, a vinyl cyanide compound and alkyl acrylate;
(B) a rubber core surrounding the seed, the rubber core comprising alkyl acrylate and a polyalkylene glycol-based cross-linking agent; and
(C) a graft shell surrounding the rubber core, the graft shell comprising at least one selected from the group consisting of an aromatic vinyl compound and a vinyl cyanide compound,
wherein the polyalkylene glycol-based cross-linking agent comprises at least one selected from the group consisting of polyethylene glycol diacrylate, polyethylene glycol dimethacrylate, polypropylene glycol diacrylate and polypropylene glycol dimethacrylate, and
wherein the polyalkylene glycol-based cross-linking agent has a number average molecular weight of 575 to 1,000 g/mol.

11. An exterior material comprising the polycarbonate resin composition according to claim 10 .

12. The exterior material according to claim 11 , wherein the exterior material comprises a vehicle exterior material or a cellular phone exterior material.

Assignees

• Lg Chemical Ltd

Inventors

• Han Hye Kyung
• Hwang Yong Yeon
• Kim Min Jung
• Park Chun Ho
• Lee Sang Mi

Classifications

• C08F212/08

  Styrene · CPC title

• C08F265/04 Primary

  on to polymers of esters · CPC title

• C08L69/00

  Compositions of polycarbonates; Compositions of derivatives of polycarbonates · CPC title

• C08L51/04

  grafted on to rubbers · CPC title

• C08F220/44

  Acrylonitrile · CPC title