Thermoplastic resin composition for vehicular lamp housing

A technology of thermoplastic resin and composition, applied in the direction of headlights, vehicle parts, vehicle lighting systems, etc., can solve the problem of damaging the appearance of vehicle lamp molded products, and achieve the effect of improving stringiness and excellent balance of physical properties

Active Publication Date: 2011-08-10
NIPPON A & L INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

) and adhere to the surface of the vehicle lampshade molded product, resulting in defects that impair the appearance of the vehicle lamp molded product
[0005] In the vibration welding method, the resin of the vehicle lamp cover melted at the welded part of the lamp cover and other parts overflows, causing so-called flashing, and similar to the hot plate welding method, there is a problem that the appearance of the molded product of the vehicle lamp is damaged.

Method used

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  • Thermoplastic resin composition for vehicular lamp housing
  • Thermoplastic resin composition for vehicular lamp housing
  • Thermoplastic resin composition for vehicular lamp housing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～4、10～14

[0183] Examples 1-4, 10-14, Comparative Examples 1-9

[0184] After mixing the components shown in Tables 4 to 6 at the ratios shown in Tables 4 to 6, each mixture was melt-kneaded at 240° C. using a 40 mm twin-screw extruder, and pelletized. Using the obtained pellets, according to ISO test method 294, various test pieces of Examples 1-4, 10-14, and Comparative Examples 1-9 were molded and produced, and (1) impact resistance and (2) fluidity were evaluated. .

[0185] (1) Impact resistance

[0186] The impact resistance of the test piece was based on ISO179, and the notched Charpy impact value was measured and evaluated at a thickness of 4 mm. Unit: kJ / m 2

[0187] (2) Liquidity

[0188] The fluidity of the test piece was based on ISO1133, and the melt volume flow rate was measured and evaluated. Unit: cm 3 / 10 minutes

[0189] After mixing the components shown in Tables 4 to 6 in the ratios shown in Tables 4 to 6, 1.0 parts by weight of carbon#45B (Mitsubishi Chemica...

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Abstract

A thermoplastic resin composition for vehicular lamp housings is provided which gives a vehicular lamp housing that shows improved hot-plate weldability, vibration weldability, or laser weldability when welded to other members, and which has an excellent balance among material properties including impact resistance and flowability. The thermoplastic resin composition for vehicular lamp housings comprises: a graft copolymer (A) obtained by graft-polymerizing, through emulsion polymerization, one or more members selected from aromatic vinyl monomers, vinyl cyanide monomers, (meth)acrylic ester monomers, and maleimide monomers with a rubbery acrylic ester polymer with a weight-average particle diameter of 70-250 nm obtained by emulsion-polymerizing 60-95 wt.% acrylic ester monomer in the presence of 5-40 wt.% aromatic vinyl polymer having a weight-average particle diameter of 10-150 nm; and a (co)polymer (C) obtained by polymerizing one or more members selected from aromatic vinyl monomers, vinyl cyanide monomers, (meth)acrylic ester monomers, and maleimide monomers.

Description

technical field [0001] The present invention relates to a thermoplastic resin composition for vehicle lampshades. Specifically, it relates to a method for improving stringiness when using the hot plate welding method and suppressing flashing when using the vibration welding method when welding other parts such as vehicle lamp covers and resin lenses manufactured using the resin composition. A thermoplastic resin composition for a vehicle lamp cover which is excellent in weldability when produced and when a laser welding method is used, and also excellent in balance of physical properties such as impact resistance, fluidity, gloss, and color rendering. Background technique [0002] Generally, a hot plate welding method, a vibration welding method, or a laser welding method is used to bond a vehicle lamp cover and a resin lens. [0003] In these welding methods, vibration is applied to the bonding surface of the vehicle cover, the vehicle cover is pressed against a hot mold, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L57/00C08F285/00C08L51/00
CPCB29C65/20B29C66/71B29C65/1635B29C65/06C08L35/06F21S48/1208C08F285/00F21S48/1394C08L25/12C08L35/00C08L51/04C08L51/003B29C65/1677C08F265/04B60Q1/00B29L2031/747C08L25/16B29C65/1616B29C65/1654B29C66/73921B29C66/919B29C66/939B29K2096/02F21S41/29F21S41/37C08L2666/02
Inventor 富田一龙田笃夫山本哲矢玉井清二
Owner NIPPON A & L INC
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