# US 8,785,528 B2 · Polycarbonate resin composition and formed product thereof

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 8,785,528 B2
- Document ID: US8785528B2
- Status: Granted
- Kind: B2
- Application number: 13/840,596
- Filed: 2013-03-15
- Published: 2013-08-08
- Granted: 2014-07-22
- Earliest claimed: 2009-02-09
- Assignees: Mitsubishi Engineering-Plastics Corporation
- Applicants: Mitsubishi Engineering-Plastics Corporation
- Inventors: Toshiki Monden
- Web page: https://patentgrep.com/patent/US8785528B2

## CPC

- C08K 5/549: containing silicon in a ring
- C08K 5/42: Sulfonic acids; Derivatives thereof
- C08K 5/5419: containing at least one Si—C bond
- C08L 69/00: Compositions of polycarbonates; Compositions of derivatives of polycarbonates
- C08G 77/60: in which all the silicon atoms are connected by linkages other than oxygen atoms
- C08L 27/12: containing fluorine atoms
- C08L 83/16: in which all the silicon atoms are connected by linkages other than oxygen atoms
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS

## Abstract

In a polycarbonate resin composition containing a polycarbonate resin and a polycarbosilane compound, the use of the polycarbosilane compound modifies the surface properties of the polycarbonate resin composition without adversely affecting the intrinsic characteristics of the polycarbonate resin, such as transparency, heat resistance, and mechanical properties, e.g., impact resistance. A polycarbonate resin composition containing 100 parts by mass of a polycarbonate resin, 0.001 to 1 part by mass of a metal salt compound, and 0.005 to 5 parts by mass of a polycarbosilane compound has significantly improved flame resistance and high transparency and causes markedly reduced outgassing and mold fouling, without losing impact resistance and heat resistance.

## Claims

### Claim 1

A polycarbonate resin composition, comprising:
0.001 to 1 part by mass of a metal salt compound,
0.001 to 1 part by mass of a fluoropolymer; and
0.01 to 2 parts by mass of a polysilane,
relative to 100 parts by mass of a polycarbonate resin,
wherein the polysilane is a linear polysilane represented by the following formula (4A):
in the formula (4A), a and b independently represent 0 or 1; R1 and R2 are each methyl; R31 and R32 each independently represent a monovalent hydrocarbon group, a hydrogen atom, or a silyl group; s and t each independently represent 0 or 1; and w represents an integer of 3 or more.

### Claim 2 (depends on 1)

The polycarbonate resin composition according to claim 1, wherein the metal salt compound is an organic sulfonic acid alkali metal salt.

### Claim 3 (depends on 2)

The polycarbonate resin composition according to claim 2, wherein the organic sulfonic acid alkali metal salt is at least one selected from a fluorine-containing aliphatic sulfonic acid alkali metal salt and an aromatic sulfonic acid alkali metal salt.

### Claim 4 (depends on 3)

The polycarbonate resin composition according to claim 3, wherein the fluorine-containing aliphatic sulfonic acid alkali metal salt is present and is a perfluoroalkane sulfonic acid alkali metal salt.

### Claim 5 (depends on 1)

A polycarbonate resin formed product manufactured by shaping the polycarbonate resin composition according to any one of claim 1, or 2 to 4.

### Claim 6 (depends on 1)

The polycarbonate resin composition according to claim 1, wherein
the metal salt compound is present in an amount of 0.05 to 0.3 parts by mass,
the fluoropolymer is present in an amount of 0.05 to 0.5 part by mass; and
the polysilane is present in an amount of 0.02 to 1 part by mass,
relative to 100 parts by mass of the polycarbonate resin.