Flameproof thermoplastic resin composition
A flameproof thermoplastic resin composition can include (A) about 5 to about 40% by weight of an epoxy group-containing rubber modified aromatic vinyl copolymer resin, (B) about 30 to about 90% by weight of a polycarbonate resin, (C) about 1 to about 50% by weight of a polyester resin and (D) about 5 to about 30 parts by weight of a phosphorus-containing flame retardant, per 100 parts by weight of a base resin comprising (A), (B) and (C).
1. A flameproof thermoplastic resin composition comprising:
(A) about 5 to about 40% by weight of an epoxy group-containing rubber modified aromatic vinyl copolymer resin comprising (a 1 ) about 0.5 to about 95% by weight of an aromatic vinyl graft copolymer resin and (a 2 ) about 5 to about 99.5% by weight of an epoxy group-containing vinyl copolymer resin, wherein said epoxy group-containing vinyl copolymer resin (a 2 ) is a copolymer comprising (a 21 ) about 0.001 to about 5 mol% of an epoxy group-containing unsaturated epoxy compound and (a 22 ) about 95 to about 99.999 mol% of a vinyl compound, wherein said (a 22 ) vinyl compound comprises about 40 to about 90% by weight of an aromatic vinyl monomer and about 10 to about 60% by weight of a monomer copolymerizable with the aromatic vinyl monomer;
(B) about 30 to about 90% by weight of a polycarbonate resin;
(C) about 1 to about 50% by weight of a polyester resin; and
(D) about 5 to about 30 parts by weight of a phosphorus-containing flame retardant, per 100 parts by weight of a base resin comprising (A), (B) and (C) wherein said epoxy group-containing vinyl copolymer resin (a 1 ) is a copolymer consisting of (a 11 ) about 0.001 to about 5 mol % of an epoxy group-containing unsaturated epoxy compound and (a 22 ) about 95 to about 99.999 mol % of a vinyl compound, wherein said (a 22 )vinyl compound consists of about 40 to about 90% by weight of an aromatic vinyl monomer selected from the group consisting of styrene, α-methyl styrene, β-methyl styrene, p-methyl styrene, p-t-butyl styrene, ethyl styrene, vinyl xylene, monochlorostyrene, dichlorostyrene, dibromosstrene, vinyl naphthalene, and combinations thereof, about 10 to about 60% by weight of monomer copolymerizable with the aromatic vinyl monomer selected from the group consisting of acrylonitrile, methacrylonitrile athacrylonitrile, and combinations thereof, and optionally about 0 to about 30% by weight of a monomer imparting processabilty and heat resistance selected from the group consisting of acrylic acid,methacrylic, maleic amhydride, C 1 -C 4 alkyl methacrylate, phenyl acrylate, phenyl methacrylate, benzyl acrylate, benzyl methacrylate, 2-phenylethyl acrylate, 2-phenylethyl methacrylate, 2-phenoxyethyl acrylate, 2-phenoxyethyl methacrylate; N-substituted maleimide; maleic acid, fumaric acid, itaconic acid anhydrides thereof; dimethyl aminoethyl acrylate, diethyl aminoethyl acrylate, vinyl imadazole, vinyl pyrrolidone, vinyl caprolactam, vinylcarbazole, vinylaniline, acrylamide, methacrylamide; and combinations thereof.
2. The flameproof thermoplastic resin composition of claim 1 , wherein said (a 21 ) epoxy group-containing unsaturated epoxy compound is represented by the following chemical formula 1:
wherein:
R 1 , R 2 , R 3 , R 6 , R 7 and R 8 are each independently hydrogen, saturated or unsaturated C 1 -C 12 alkyl, C 6 -C 14 aryl, alkyl-substituted aryl or unsaturated alkyl-substituted aryl; and
Y is an ether group (—O—), carboxyl group (—O—[C═O]—,—[O═C]—O—), C 1 -C 12 alkylene, C 6 -C 14 arylene, or alkyl-substituted arylene;
with the proviso that when Y is an ether group (—O—) or carboxyl group (—O—[C═0]—, —[O═C]—O—), R 4 and R 5 are each independently C 1 -C 12 alkylene, C 6 -C 14 arylene or alkyl-substituted arylene; and when Y is C 1 -C 12 alkylene, C 6 -C 14 arylene or alkyl-substituted arylene, Y represents a (R4-Y-R5) structure.
3. The flameproof thermoplastic resin composition of claim 1 , wherein said unsaturated epoxy compound (a 21 ) is selected from the group consisting of epoxy alkyl acrylate, allyl glycidyl ester, aryl glycidyl ester, glycidyl methacrylate, glycidyl acrylate, butadiene monooxide, vinyl glycidyl ether, glycidyl itaconate and combinations thereof.
4. The flameproof thermoplastic resin composition of claim 1 , further comprising at least one additive selected from the group consisting of lubricants, releasing agents, antistatic agents, anti-dripping agents, impact modifiers, anti-oxidants, plasticizers, heat stabilizers, light stabilizers, compatibilizers, pigments, dyes, inorganic fillers and combinations thereof.
5. The flameproof thermoplastic resin composition of claim 1 , wherein said (a 22 ) vinyl compound consists of about 50 to about 90% by weight of said aromatic vinyl monomer and about 10 to about 60% by weight of said monomer copolymerizable with the aromatic vinyl monomer vinyl compound.
6. The flameproof thermoplastic resin composition of claim 1 , wherein said monomer copolymerizable with the aromatic vinyl monomer is an unsaturated nitrile monomer.
7. The flameproof thermoplastic resin composition of claim 6 , wherein said vinyl compound (a 22 ) is a copolymer of about 40 to about 90% by weight of an aromatic vinyl monomer selected from the group consisting of styrene, α-methyl styrene, β-methyl styrene, p-methyl styrene, p-t-butyl styrene, ethyl styrene, vinyl xylene, monochlorostyrene, dichlorostyrene, dibromostyrene, vinyl naphthalene, and combinations thereof and about 10 to about 60% by weight of the unsaturated nitrile monomer.
8. The flameproof thermoplastic resin composition of claim 1 , wherein said phosphorus-containing flame retardant (D) is selected from the group consisting of phosphate, phosphonate, phosphinate, phosphine oxide, phosphazene, and metal salts thereof.
9. The flameproof thermoplastic resin composition of claim 8 , wherein said phosphate is an aromatic phosphoric acid ester compound represented by the following chemical formula 3:
wherein R 1 , R 2 , R 4 , and R 5 independently of one another are C 6 -C 20 aryl group or alkyl-substituted C 6-20 aryl group, R 3 is a derivative of resorcinol, hydroquinol, bisphenol-A, or bisphenol-S, and n is 0 to 5.
10. The flameproof thermoplastic resin composition of claim 1 , wherein said aromatic vinyl graft copolymer resin (a 1 ) comprises (a 11 ) about 20 to about 100% by weight of a graft copolymer resin and (a 12 ) about 0 to about 80% by weight of a copolymer resin.
11. The flameproof thermoplastic resin composition of claim 10 , wherein said graft copolymer resin (a 11 ) is a graft copolymer of about 5 to about 60% by weight of a rubbery polymer, about 20 to about 80% by weight of an aromatic vinyl monomer and about 5 to about 45% by weight of a monomer copolymerizable with the aromatic vinyl monomer; and said copolymer resin (a 12 ) is a copolymer of about 50 to about 95% by weight of an aromatic vinyl monomer and about 5 to about 50% by weight of an unsaturated nitrile monomer.
12. The flameproof thermoplastic resin composition of claim 11 , wherein said monomer copolymerizable with the aromatic vinyl monomer is selected from the group consisting of acrylonitrile, methacrylonitrile, methyl(meth)acrylate, ethyl(meth)acrylate, propyl(meth)acrylate, butyl(meth)acrylate, N-substituted maleimide, maleic anhydride and combinations thereof.
13. A molded article produced from the flameproof thermoplastic resin composition as defined by claim 1 .
14. The molded article of claim 13 , wherein said molded article has an Izod notch impact strength of about 40 kgf·cm/cm or more measured in accordance with ASTM D-256 using a ⅛″ thick test sample and a flame retardancy of V0 according to UL 94 VB at a sample thickness of 2.5 mm.