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Thermoplastic resin composition and molded article produced by molding the same

a technology of thermoplastic resin and composition, which is applied in the direction of coatings, etc., can solve the problems of increasing environmental loads, complex process, and poor thermoplastic resin composition properties, and achieves good weather resistance, impact resistance, and color forming properties. good

Active Publication Date: 2022-11-03
TECHNO UMG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides a thermoplastic resin composition that can be used to produce molded articles with excellent color forming properties, weather resistance, and impact resistance. These molded articles can be used as vehicle exterior parts and maintain a suitable appearance over a long period of time without painting.

Problems solved by technology

However, the production methods including painting increase environmental loads, the complexity of the process, and the rejection rate.
Since the resin components of the thermoplastic resin compositions known in the related art do not have sufficiently high transparency or sufficiently high weather-resistant transparency, the thermoplastic resin compositions were poor in terms of property of forming colors with dyes, that is, in particular, property of forming jet black, and weather-resistant color forming property.
Thus, the jet black-tinted appearance may become degraded with time.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

examples

[0151]The present invention is described below further specifically with reference to Examples and Comparative examples below. The present invention is not limited to Examples below without departing from the scope of the present invention.

[0152]Hereinafter, the expression “part” means “part by mass”, and the expression “%” means “% by mass”.

[0153]The measurement and evaluation methods used in Examples and Comparative examples below are as follows.

[0154]The volume-average particle sizes (X) of the copolymers (A-1) to (A-12) and the graft copolymers (B-1) to (B-11) prepared in Examples and Comparative examples were measured using Nanotrac UPA-EX150 produced by Nikkiso Co., Ltd. by dynamic light scattering.

[0155]The particle size distribution of each of the copolymers (A-1) to (A-12) was determined by the same method as described above. Specifically, the particle size that corresponded to the frequency upper limit 10% was defined as frequency upper limit 10%-volume particle size (Y), ...

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Abstract

A thermoplastic resin composition including a graft copolymer (B) produced by graft polymerization of a vinyl monomer mixture (m1) including an alkyl (meth)acrylate ester, a vinyl cyanide compound, and an aromatic vinyl compound onto a copolymer (A) produced by copolymerizing an alkyl (meth)acrylate ester (a) and a (meth)acrylate ester (b) including an aromatic hydrocarbon group at a specific ratio and a copolymer (C) that is a product of a polymerization reaction of a vinyl monomer mixture (m2) including an alkyl (meth)acrylate ester. The graft copolymer (B) includes at least a graft copolymer (B) having a specific volume-average particle size. The copolymer (A) has a specific volume-average particle size and a specific particle size distribution.

Description

TECHNICAL FIELD[0001]The present invention relates to a thermoplastic resin composition with which a molded article that is excellent in terms of color forming property, weather resistance, and impact resistance and is particularly excellent in terms of weather-resistant color forming property can be produced and a molded article produced by molding the thermoplastic resin composition.BACKGROUND ART[0002]Vehicle exterior parts, such as door mirrors, pillars, garnishes, molding, fenders, bumpers, front grilles, and cowls, are required to have not only excellent impact resistance and excellent weather resistance but also high appearance quality appropriate to the graphical design function of quality products. Specifically, the vehicle exterior parts are required to have high color forming property, that is, in particular, a property of forming jet black.[0003]In the production of vehicle exterior parts and the like, molded articles have been coated with a paint in order to enhance app...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C08L33/12
CPCC08L33/12C08L2205/03C08L2205/025C08L2203/30C09D151/06C08L51/06C08F220/14C08F265/04C08L51/003C09D151/003C08F279/02C08F285/00C08L51/04C09D151/04C08F212/08C08F220/44C08F220/1804C08F220/301C08F220/40C08F222/102C08F222/02C08L25/18
Inventor TAGUCHI, YUUKINAITOH, YOSHITAKA
Owner TECHNO UMG CO LTD
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