Unsaturated polyester resin composition, lamp reflector and method for producing same
A polyester resin, unsaturated technology, applied in the direction of reflectors, headlights, electric light sources, etc., can solve the problems of reduced manufacturing efficiency of light reflectors, uneven surface coating of primers, and inability to coat primers, etc. , to achieve excellent mold release and anti-fog performance, excellent dimensional accuracy and mechanical properties, and improve productivity
Inactive Publication Date: 2017-05-31
SHOWA DENKO KK
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Problems solved by technology
Although the release agent can easily release the molded body by bleed on the surface of the molded body, it will become a "surface coating" in which the primer is applied to the surface of the molded body. Uneven” causes the problem that the primer cannot be evenly coated on the surface of the molded body
[0005] As a means to solve this problem, there are known methods of removing the mold release agent overflowing the surface of the molded body by cleaning treatment, heat treatment, flame treatment, etc., but such removal of the mold release agent involves damage to the light reflector. Reduced manufacturing efficiency and increased manufacturing costs
Method used
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[0089] Each component was added in the addition composition shown in Table 1, and it kneaded using the twin-arm kneader, and the unsaturated polyester resin composition was obtained. In addition, (a) unsaturated polyester resin shown in Table 1 and 2 contained 30 mass % of styrene monomers.
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Abstract
This unsaturated polyester resin composition contains (a) an unsaturated polyester resin, (b) a metal soap, (c) a carboxylic acid, (d) an inorganic filler, (e) a shrinkage reducing agent, (f) a fiber reinforcing material and (g) a curing agent. In this unsaturated polyester resin composition, 1-3 parts by mass of the component (b), 5-15 parts by mass of the component (c), 350-550 parts by mass of the component (d), 10-30 parts by mass of the component (e) and 70-120 parts by mass of the component (f) are contained per 100 parts by mass of the component (a). An unsaturated polyester resin composition having the above-described composition is capable of providing a molded body which exhibits excellent coatability of an undercoating agent, mold releasability and fogging properties without performing a removal process of a mold release agent, while having excellent dimensional accuracy and mechanical characteristics.
Description
technical field [0001] The invention relates to an unsaturated polyester resin composition, a light reflector and a manufacturing method thereof. Specifically, the present invention relates to an unsaturated polyester resin composition, a lamp reflector, and a method for producing the lamp reflector used in automobile headlamps and the like. Background technique [0002] The unsaturated polyester resin composition obtained by adding fiber reinforcement and inorganic filler to the unsaturated polyester resin has good moldability, and can provide curing with excellent surface smoothness, dimensional accuracy, heat resistance and mechanical strength. Therefore, it is widely used in the manufacture of OA (office automation) equipment, racks of office equipment, light reflectors of automobile headlights, etc. [0003] Among them, in the manufacture of light reflectors, after the primer layer is formed by applying and curing a primer on the surface of a molded body (substrate) ob...
Claims
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IPC IPC(8): C08F283/01F21S8/10F21V7/00F21V7/22
CPCC08F283/01F21V7/00F21V7/28F21S41/321F21S41/37
Inventor 田村审史三木俊直山内慎太郎
Owner SHOWA DENKO KK