Polyarylene sulfide thermoplastic resin composition

1. A composition comprising in a mixture:

a polyarylene sulfide resin;

an olefinic graft copolymer comprising 40˜90 parts by weight of an olefin/vinyl copolymer moiety and 10˜60 parts by weight of a vinyl polymer moiety grafted on the olefin/vinyl copolymer moiety wherein the olefin/vinyl copolymer comprises 60˜100% by weight of an olefin monomer and up to 40% by weight of a vinyl monomer;

a fluorinated polyolefin resin, and

a cycloaliphatic epoxy compound represented by the following formula (II):

wherein R1 and R2 are independently C6-C8 aryl; and n is 0 or 1,

wherein the polyarylene sulfide resin present in an amount of from about 20 to about 99.4 parts by weight based on total 100 parts by weight of the composition, the olefinic graft copolymer resin in an amount of from about 0.5 to about 10 parts by weight based on total 100 parts by weight of the composition, the fluorinated polyolefin resin is present in an amount of from about 0.1 to about 10 parts by weight based on total 100 parts by weight of the composition and the composition comprises up to about 3 parts by weight of the cycloaliphatic epoxy compound based on total 100 parts by weight of the composition.

2. The composition of claim 1 , wherein the olefin monomer is one or more selected from the group consisting of ethylene, propylene, and butylene.

3. The composition of claim 1 , wherein the vinyl monomer is one or more selected from the group consisting of vinyl acetate, glycidyl methacrylate, glycidyl acrylate, glycidyl ethacrylate, methyl (meth)acrylate, ethyl (meth)acrylate, butyl (meth)acrylate, and mixtures of one or more of methyl (meth)acrylate, ethyl (meth)acrylate, and butyl (meth)acrylate with maleic anhydride.

4. The composition of claim 1 , wherein the vinyl polymer moiety comprises one or more selected from the group consisting of polymethyl methacrylate, polystyrene, and copolymer of styrene and a vinyl cyanide monomer.

5. The composition of claim 1 , wherein the olefinic graft copolymer comprises poly(ethylene-glycidyl methacrylate)/poly(styrene-acrylonitrile).

6. The composition of claim 1 , wherein the fluorinated polyolefin resin comprises polytetrafluoroethylene.

7. The composition of claim 1 , wherein the polyarylene sulfide resin comprises at least about 70 molar % of a recurring unit represented by the following formula (I):

wherein the polyarylene sulfide resin has a melt index of about 10 to about 300 g/10 min under 2.16 kg load at 316° C.

8. The composition of claim 1 , wherein the polyarylene sulfide resin comprises less than about 50 molar % of one or more recurring units represented by the following formulas:

9. The composition of claim 1 , wherein the epoxy compound comprises at least one selected from the group consisting of polyglycidyl ether compounds, polyglycidyl amine epoxy compounds, bisphenol A type epoxy compounds, bisphenol F epoxy type compounds, resorcinol type epoxy compounds, tetrahydroxy bisphenol F type epoxy compounds, cresol novolak type epoxy compounds, phenol novolak type epoxy compounds, and cycloaliphatic epoxy compounds.

10. The composition of claim 1 , further comprising up to about 70 parts by weight of a filler.

11. The composition of claim 10 , wherein the filler comprises one or more selected from the group consisting of fibrous fillers and powdery fillers.

12. The composition of claim 1 , wherein the composition has flame retardancy of V-0 when a specimen of the composition is tested according to UL-94 VB flame retardant standards for a specimen thickness of 0.8 mm.

13. A molded article formed from the composition of claim 1 .

14. An electronic part, comprising the composition of claim 1 .

15. The composition of claim 1 wherein the amount of olefin grail copolymer is from about 5 to about 10 parts by weight based on total 100 parts by weight of the composition.