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Styrene-based thermoplastic resin composition excellent in vacuum-formability

A technology of styrene resin and composition, applied in the field of thermoplastic resin composition, can solve the problems of difficult mass production and high production cost

Inactive Publication Date: 2005-07-13
CHEIL IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disadvantage of the above method is that since the resin composition is prepared by solution polymerization, it results in high production cost and is difficult to produce on a large scale

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0028] Each component of (A), (B) and (C) used in Examples 1-3 and Comparative Examples 1-3 was prepared as follows:

[0029] (A) graft copolymer

[0030] In the reactor, the average rubber particle size of 50 parts by weight is the polybutadiene latex of 0.3 μm, then add 150 parts of deionized water, 0.9 part of turpentine soap, 0.3 part of cumene hydroperoxide, 0.2 part of mercaptan-containing chain transfer agent and 0.3 parts of glucose. The temperature was maintained at 70°C. To this mixture, 35 parts of styrene and 15 parts of acrylonitrile were added dropwise over 3 hours, and polymerization was initiated with a redox initiator to obtain a styrene-acrylonitrile-butadiene graft copolymer latex. Add 1.5% magnesium sulfate aqueous solution to the obtained product to make it coagulate, and produce styrene-acrylonitrile-butadiene graft copolymer resin powder after drying.

[0031] (B) SAN copolymer

[0032] The SAN copolymer used was a product manufactured by Cheil Indus...

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PUM

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Abstract

The thermoplastic resin composition of the present invention contains: (A) 20-50wt% graft copolymer, which is grafted to 30-70wt% by 70-30wt% monomer mixture containing vinyl cyanide compound and vinyl aromatic compound % butadiene rubber; (B) 40-60 wt% styrene-acrylonitrile copolymer prepared by polymerizing 50-90 wt% vinyl aromatic compounds and 50-10 wt% vinyl cyanide compounds and (C) 0.1-30 wt% of an ultrahigh molecular weight copolymer having a weight average molecular weight of 1000,000-5000,000 polymerized by 50-90 wt% of a vinyl aromatic compound and 10-50 wt% of a vinyl cyanide compound while preparing.

Description

field of invention [0001] The present invention relates to a styrene thermoplastic resin composition having good vacuum forming properties. More specifically, the present invention relates to a thermoplastic resin composition that utilizes ultra-high molecular weight styrene-acrylonitrile copolymer (SAN) to improve its tensile properties so as to have excellent vacuum formability. Background of the invention [0002] Vacuum forming is a method of plastic molding. In this method, a resin composition is usually extruded into a sheet, the sheet is heated in a vacuum forming machine to become soft, and then the soft sheet is tightly pasted on a mold to obtain a desired shape. In general, vacuum forming utilizes a stretching property of the resin. The term "tensile properties" as used herein refers to the resistance of a resin to elongation or expansion by an external force at high temperature to become a flowable resin. If the resin has good tensile properties, the wall thick...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F279/04C08L25/12C08L55/02
CPCC08F279/04C08L25/12C08L55/02C08L2666/02C08L2666/04
Inventor 郑宗勋金星国崔真丸李庚南
Owner CHEIL IND INC