Flame-retardant thermoplastic resin composition and a molded product thereof

Patent metadata

Field	Value
Publication number	US-9556334-B2
Application number	US-201514706279-A
Country	US
Kind code	B2
Filing date	May 7, 2015
Priority date	May 7, 2014
Publication date	Jan 31, 2017
Grant date	Jan 31, 2017

Abstract

Provided herein is a flame-retardant thermoplastic resin composition and a molded product thereof, the composition including polycarbonate resin, rubber modified aromatic vinyl copolymer, aromatic phosphate ester compound, glass fiber, and carbon fiber, wherein the composition includes a weight ratio of the glass fiber to the carbon fiber of about 1:0.3 to about 1:2.

First claim

What is claimed is:

1. A flame-retardant thermoplastic resin composition comprising:
polycarbonate resin,
about 5 to about 30 parts by weight of rubber modified aromatic vinyl copolymer,
about 10 to about 30 parts by weight of aromatic phosphate ester compound,
about 1 to about 50 parts by weight of glass fiber, wherein the glass fiber has a diameter of about 5 to about 20 μm and a length of about 1.5 to about 8 mm and wherein in a cross-section of the glass fiber, an average ratio of a major axis to minor axis is about 1:1 to about 2:1, and
about 1 to about 50 parts by weight of carbon fiber, wherein the carbon fiber has a diameter of about 3 to about 20 μm and a length of about 1.5 to about 12 mm, each based on about 100 parts by weight of the polycarbonate resin,
wherein the weight ratio of the glass fiber to the carbon fiber is about 1:0.3 to about 1:2.

2. The composition according to claim 1 , wherein the glass fiber has an average ratio of diameter to length of about 1:75 to about 1:1600.

3. The composition according to claim 1 , wherein the carbon fiber has an average ratio of diameter to length of about 1:75 to about 1:4000.

4. The composition according to claim 1 , wherein the rubber modified aromatic vinyl copolymer comprises about 20 to 100 weight % of aromatic vinyl graft copolymer resin and 0 to about 80 weight % of aromatic vinyl copolymer resin.

5. The composition according to claim 1 , wherein the aromatic phosphate ester compound is represented by Chemical Formula 2:

wherein R4, R5, and R6 are the same or different and each are independently hydrogen or C1 to C4 alkyl; each X is independently C6 to C20 aryl or C1 to C10 alkyl-substituted C6 to C20 aryl; and i is 0 to 4.

6. The composition according to claim 1 , wherein the glass fiber is not surface treated and/or is surface treated with a glass fiber treatment agent consisting of a lubricant, coupling agent and/or surfactant.

7. The composition according to claim 1 , wherein a molded product produced from the composition has a flame-retardancy of V-0 measured in accordance with UL-94, an Izod impact strength measured according to ASTM D256 of about 5 to about 7 kgfcm/cm, and a flexural modulus measured according to ASTM D790 of about 55,000 to about 75,000 kgf/cm 2 .

8. The composition according to claim 7 , wherein a molded product produced from the composition has a coefficient of linear thermal expansion (CTE) of less than about 30 μm/(m·° C.).

9. The composition according to claim 8 , wherein a molded product produced from the composition has a coefficient of linear thermal expansion (CTE) of 24 μm/(m·° C.) or less.

10. A molded product produced from the composition according to claim 1 .

11. The molded product according claim 10 , wherein the molded product has a coefficient of linear thermal expansion (CTE) of less than about 30 μm/(m·° C.).

12. The molded product according claim 10 , wherein the molded product has a flame-retardancy of V-0 measured in accordance with UL-94, an Izod impact strength measured according to ASTM D256 of about 5 to about 7 kgfcm/cm, and a flexural modulus measured according to ASTM D790 of about 55,000 to about 75,000 kgf/cm 2 .

Assignees

• Samsung Sdi Co Ltd

Inventors

• Chin Kyoungsik
• Kim Suji
• Shin Seungshik
• Kim Pilho

Classifications

• C08K5/523

  with hydroxyaryl compounds · CPC title

• C08L69/00 Primary

  Compositions of polycarbonates; Compositions of derivatives of polycarbonates · CPC title

• C08K7/14

  Glass · CPC title

• C08L25/12

  with unsaturated nitriles · CPC title

• C08K7/06

  Elements · CPC title