Polycarbonate resin composition and molded article
View Patent ↗Provided a polycarbonate resin composition excellent in flame resistance, impact resistance, and color fastness. A polycarbonate resin composition containing, per 100 parts by mass of polycarbonate resin (A), 0.001 to 30 parts by mass of flame retardant (B), 0.001 to 1 part by mass of fluoropolymer (C), and 0.5 to 10 parts by mass of graft copolymer (D) obtainable by graft-copolymerizing a diene-based rubber with a (meth)acrylate ester compound, the graft copolymer (D) having (i) a sulfur content of 100 to 1500 ppm, and (ii) an average particle size of 70 to 240 nm.
1. A polycarbonate resin composition containing, per 100 parts by mass of polycarbonate resin (A), 0.001 to 30 parts by mass of flame retardant (B), 0.001 to 1 part by mass of fluoropolymer (C), and 0.5 to 10 parts by mass of graft copolymer (D) obtainable by graft-copolymerizing a diene-based rubber with a (meth)acrylate ester compound,
the graft copolymer (D) having (i) a sulfur content of 100 to 1500 ppm, and (ii) an average particle size of 70 to 240 nm.
2. The polycarbonate resin composition of claim 1 ,
wherein, in the graft copolymer (D), content of a butadiene-derived component in the diene-based rubber is 80% by mass or more.
3. The polycarbonate resin composition of claim 1 ,
wherein 1 to 10 parts by mass of the graft copolymer (D) is contained per 100 parts by mass of polycarbonate resin.
4. The polycarbonate resin composition of claim 1 ,
wherein sulfur content of the graft copolymer (D) is 300 to 800 ppm.
5. The polycarbonate resin composition of claim 1 ,
containing 3 to 30 parts by mass of phosphorus-containing flame retardant (B-1) as the flame retardant, per 100 parts by mass of polycarbonate resin (A).
6. The polycarbonate resin composition of claim 5 ,
wherein the phosphorus-containing flame retardant (B-1) is represented by the formula (1) below:
[in the formula (1), each of R 1 , R 2 , R 3 and R 4 independently represents a C 1-6 alkyl group or a C 6-20 aryl group which may be substituted by an alkyl group, each of p, q, r and s independently represents 0 or 1, k is an integer of 1 to 5, and X 1 represents an arylene group.]
7. The polycarbonate resin composition of claim 5 ,
wherein the phosphorus-containing flame retardant (B-1) is a phosphazene compound represented by the formulae (2) and/or (3) below:
[in the formula (2), t is an integer of 3 to 25, R 5 and R 6 may be same or different, and each of which represents an aryl group or alkylaryl group],
[in the formula (3), u is an integer of 3 to 10,000, R 9 represents at least one species selected from —N═P(OR 7 ) 3 group, —N═P(OR 8 ) 3 group, —N═P(O)OR 7 group and —N═P(O)OR 8 group, and R 10 represents at least one species selected from —P(OR 7 ) 4 group, —P(OR 8 ) 4 group, —P(O)(OR 7 ) 2 group and —P(O)(OR 8 ) 2 group, R 7 and R 8 may be same or different, and each of which represents an aryl group or alkylaryl group.]
8. The polycarbonate resin composition of claim 1 ,
containing 0.001 to 1 part by mass of metal organosulfonate (B-2) as the flame retardant, per 100 parts by mass of polycarbonate resin (A).
9. The polycarbonate resin composition of claim 8 ,
wherein the metal organosulfonate (B-2) is an alkali metal salt of fluorine-containing aliphatic sulfonic acid.
10. The polycarbonate resin composition of claim 8 ,
wherein the metal organosulfonate (B-2) is an alkali metal salt of perfluoroalkanesulfonic acid.
11. The polycarbonate resin composition of claim 1 ,
wherein average particle size of the graft copolymer (D) is 100 to 180 nm.
12. The polycarbonate resin composition of claim 1 ,
wherein graft copolymer (D) is obtainable by graft-copolymerizing a diene-based rubber with at least methyl methacrylate.
13. A molded article obtainable by molding the polycarbonate resin composition described in claim 1 .
14. The molded article of claim 13 , being a battery pack container.
15. The polycarbonate resin composition of claim 2 ,
wherein 1 to 10 parts by mass of the graft copolymer (D) is contained per 100 parts by mass of polycarbonate resin.
16. The polycarbonate resin composition of claim 2 ,
wherein sulfur content of the graft copolymer (D) is 300 to 800 ppm.
17. The polycarbonate resin composition of claim 3 ,
wherein sulfur content of the graft copolymer (D) is 300 to 800 ppm.
18. The polycarbonate resin composition of claim 2 ,
containing 3 to 30 parts by mass of phosphorus-containing flame retardant (B-1) as the flame retardant, per 100 parts by mass of polycarbonate resin (A).
19. The polycarbonate resin composition of claim 3 ,
containing 3 to 30 parts by mass of phosphorus-containing flame retardant (B-1) as the flame retardant, per 100 parts by mass of polycarbonate resin (A).
20. The polycarbonate resin composition of claim 4 ,
containing 3 to 30 parts by mass of phosphorus-containing flame retardant (B-1) as the flame retardant, per 100 parts by mass of polycarbonate resin (A).