Thermoplastic polycarbonate resin composition and molded product formed therefrom

Patent metadata

Field	Value
Publication number	US-11732128-B2
Application number	US-201816764097-A
Country	US
Kind code	B2
Filing date	Dec 28, 2018
Priority date	Dec 29, 2017
Publication date	Aug 22, 2023
Grant date	Aug 22, 2023

Abstract

A thermoplastic resin composition of the present invention comprises: approximately 100 parts by weight of a polycarbonate resin; approximately 1-10 parts by weight of a first rubber-modified vinyl-based graft copolymer in which a monomer mixture comprising an aromatic vinyl-based monomer and a cyanovinyl-based monomer is graft-polymerized onto a rubbery polymer; approximately 1-10 parts by weight of a second rubber-modified vinyl-based graft copolymer in which an alkyl (meth)acrylate-based monomer is graft-polymerized onto a rubbery polymer; approximately 1-30 parts by weight of a phosphorus flame retardant; and approximately 0.1-5 parts by weight of an encapsulated fluoropolymer. The thermoplastic resin composition has excellent impact resistance, thin film flame retardancy, heat resistance, flowability and the like.

First claim

The invention claimed is:

1. A thermoplastic resin composition comprising:
about 100 parts by weight of a polycarbonate resin;
about 1 part by weight to about 10 parts by weight of a first rubber-modified vinyl graft copolymer obtained through graft polymerization of a monomer mixture comprising an aromatic vinyl monomer and a vinyl cyanide monomer to a rubber polymer, wherein the rubber polymer of the first rubber-modified vinyl graft copolymer is present in an amount of 20 wt % to 60 wt % based on 100 wt % of the first rubber-modified vinyl graft copolymer, wherein the first rubber-modified vinyl graft copolymer is a g-ABS copolymer obtained by grafting styrene and acrylonitrile to a butadiene rubber polymer and has a butadiene rubber polymer core-styrene-acrylonitrile copolymer shell, wherein the first rubber-modified vinyl graft copolymer is obtained through emulsion polymerization;
about 1 part by weight to about 10 parts by weight of a second rubber-modified vinyl graft copolymer obtained through graft polymerization of an alkyl (meth)acrylate monomer to a rubber polymer;
about 1 part by weight to about 30 parts by weight of a phosphorus flame retardant, wherein the phosphorus flame retardant is hydroquinone bis(diphenyl phosphate); and
about 0.1 parts by weight to about 5 parts by weight of a capsulated fluorine polymer,
wherein the first rubber-modified vinyl graft copolymer and the second rubber-modified vinyl graft copolymer are present in a weight ratio of 1:1.5 to 1:2.5, and
wherein the thermoplastic resin composition has a notched Izod impact strength of 55 kgf·cm/cm to about 80 kgf·cm/cm, as measured on a ⅛″ thick specimen in accordance with ASTM D256; a flame retardancy of V-0 or higher, as measured on a 1.2 mm thick specimen by a UL-94 vertical test method; a flame retardancy of 5VA, as measured on a 2.5 mm thick specimen by a UL-94 vertical test method; a Vicat softening temperature of about 90° C. to about 120° C., as measured under conditions of a load of 5 kg and 50° C./hr in accordance with ISO R306, and a melt-flow index (MI) of about 20 g/10 min to about 50 g/10 min, as measured under conditions of 220° C. and 10 kgf in accordance with ASTM D1238.

2. The thermoplastic resin composition according to claim 1 , wherein the second rubber-modified vinyl graft copolymer is obtained through graft polymerization of a monomer mixture comprising the alkyl (meth)acrylate monomer and an aromatic vinyl monomer to the rubber polymer.

3. The thermoplastic resin composition according to claim 1 , wherein the capsulated fluorine polymer is polytetrafluoroethylene capsulated with a polymer of styrene and acrylonitrile.

4. A molded product formed of the thermoplastic resin composition according to claim 1 .

5. The thermoplastic resin composition according to claim 1 , comprising about 1 part by weight to 7.5 parts by weight of the second rubber-modified vinyl graft copolymer obtained through graft polymerization of an alkyl (meth)acrylate monomer to a rubber polymer.

Assignees

• Lotte Chemical Corp

Inventors

• Kim Myeong Hwan

Classifications

• C08L69/00 Primary

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

• C08L51/04

  grafted on to rubbers · CPC title

• C08L55/02

  ABS [Acrylonitrile-Butadiene-Styrene] polymers · CPC title

• C08L2201/02

  Flame or fire retardant/resistant · CPC title

• C08L2205/025

  containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure · CPC title