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US 2014/0350148 A1Published application
Aromatic polycarbonate resin composition and optical molded article
AssigneeIdemitsu Kosan Co., Ltd.
InventorsMasami Takimoto, Yasunobu Yamazaki
Life of this patent
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Abstract
Provided are an aromatic polycarbonate resin composition, including, with respect to 100 parts by mass of an aromatic polycarbonate resin (A), 0.005 to 0.5 parts by mass of a diphosphite compound (B) represented by the following general formula (I) and 0.001 to 0.5 parts by mass of an alicyclic epoxy compound (C), and an optical molded article: in the formula (I), R1, R2, R4, R5, R7, R8, R10, and R11 each independently represent a hydrogen atom, an alkyl group, or the like, R3, R6, R9, and R12 each independently represent an alkyl group, an aryl group, an aralkyl group, or the like, and m each independently represent an integer of 0 to 3.
Claims9
1:
- An aromatic polycarbonate resin composition, comprising 100 parts by mass of an aromatic polycarbonate resin (A), 0.005 to 0.5 parts by mass of a diphosphite compound (B) represented by formula (I) and 0.001 to 0.5 parts by mass of an alicyclic epoxy compound (C):
- wherein in the formula (I),
- R1, R2, R4, R5, R7, R8, R10, and R11 each independently represent a hydrogen atom or an alkyl group having 1 to 4 carbon atoms that may have a substituent,
- R3, R6, R9, and R12 each independently represent a group selected from the group consisting of an alkyl group having 1 to 4 carbon atoms, an aryl group having 6 to 12 carbon atoms, and an aralkyl group having 7 to 12 carbon atoms, and
- each m independently represents an integer of 0 to 3.
2 more elements
2:
- The aromatic polycarbonate resin composition according to claim 1, wherein the aromatic polycarbonate resin (A) comprises 0 to 150 parts by mass of a polycarbonate copolymer having repeating units represented by formulae (a-1) and (a-2) with respect to 100 parts by mass of an aromatic polycarbonate resin:
- wherein
- in the formula (a-1),
- R13 and R14 each independently represent an alkyl group having 1 to 6 carbon atoms,
- X represents a single bond, an alkylene group having 1 to 8 carbon atoms, an alkylidene group having 2 to 8 carbon atoms, a cycloalkylene group having 5 to 15 carbon atoms, a cycloalkylidene group having 5 to 15 carbon atoms, —S—, —SO—, —SO2—, —O—, or —CO—, and
- a and b each independently represent an integer of from 0 to 4;
- and
- in the formula (a-2), R15 and R16 each independently represent an alkyl group having 1 to 3 carbon atoms,
- Y represents a linear or branched alkylene group having 2 to 15 carbon atoms,
- c and d each independently represent an integer of from 0 to 4, and
- n represents an integer of from 2 to 200.
8 more elements
3:
- The aromatic polycarbonate resin composition according to claim 1, wherein the diphosphite compound (B) is bis(2,4-dicumylphenyl)pentaerythritol diphosphite.
4:
- The aromatic polycarbonate resin composition according to claim 1, wherein a residual sodium content in the diphosphite compound (B) is 3 ppm by mass or less.
5:
- The aromatic polycarbonate resin composition according to claim 1, wherein the alicyclic epoxy compound (C) comprises 3,4-epoxycyclohexenylmethyl-3′,4′-epoxycyclohexenecarboxylate and/or a 1,2-epoxy-4-(2-oxiranyl)cyclohexane adduct of 2,2-bis(hydroxymethyl)-1-butanol.
6:
- The aromatic polycarbonate resin composition according to claim 1, further comprising 0.01 to 1 parts by mass of a modified silicone compound with respect to 100 parts by mass of the aromatic polycarbonate resin (A).
7:
- The aromatic polycarbonate resin composition according to claim 1, wherein per 100 g of a pellet obtained by melting and kneading the aromatic polycarbonate resin composition, a number of foreign matters each having a size of 50 μm or more is 5 or less, a number of foreign matters each having a size of 20 μm or more and less than 50 μm is 20 or less, and a number of foreign matters each having a size of 5 μm or more and less than 20 μm is 200 or less.
8:
- The aromatic polycarbonate resin composition according to claim 7, wherein the pellet has a viscosity-average molecular weight of 13,000 or less in terms of the aromatic polycarbonate resin.
9:
- An optical molded article, obtained by molding the aromatic polycarbonate resin composition according to claim 1.