Global mold plastic, preparing method and uses thereof

A technology of mass molding compound and inorganic filler, which is applied in the field of materials to achieve the effect of compact products and high mechanical strength

A technology of mass molding compound and inorganic filler, which is applied in the field of materials to achieve the effect of compact products and high mechanical strength

CN101270216AInactive Publication Date: 2008-09-24HASCO VISION TECHNOLOGY CO LTD
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 13.5 parts of ortho-phthalic unsaturated polyester (P17) produced by Jinling DSM Resin Co., Ltd., 9.1 parts of anti-shrinkage agent (H892) produced by Jinling DSM Resin Co., Ltd., 0.3 parts of tert-butyl peroxybenzoate , 0.18 parts of 1,1-bis(tert-butylperoxy)-3,3,5-trimethylcyclohexane, and 0.04 parts of magnesium oxide were uniformly mixed in a high-speed mixer to obtain a resin paste. In addition, 57 parts of calcium carbonate with a median particle size of 1.5 μm, 6.3 parts of calcium carbonate with a median diameter of 10 μm, 0.25 parts of calcium stearate, and 0.45 parts of zinc stearate were mixed uniformly in a kneader, and the previously prepared resin was added. paste, after mixing, add 14.1 parts of chopped glass fibers with a length of 6 mm, and knead for 8 minutes to obtain a BMC bulk molding compound. The BMC material prepared in this way is used to inject the vehicle light reflector substrate on the injection molding machine, the mold is heated by steam, ...

Embodiment 2

[0028] Change the median particle size of two kinds of calcium carbonate into 3 μm and 9 μm, all the other are all the same as embodiment 1. As a result, the heat distortion temperature is greater than 210°C, the bending strength is 74Mpa, and the impact strength is 14KJ / m 2 .

Embodiment 3

[0030] 12.6 parts of ortho-phthalic unsaturated polyester (P17) produced by Jinling DSM Resin Co., Ltd., 9.3 parts of anti-shrinkage agent (H892) produced by Jinling DSM Resin Co., Ltd., 0.2 part of tert-butyl peroxybenzoate , 0.20 parts of 1,1-bis(tert-butylperoxy)-3,3,5-trimethylcyclohexane, 0.08 parts of magnesium oxide, and 0.6 parts of styrene were mixed uniformly in a high-speed mixer to obtain a resin paste . In addition, 43 parts of calcium carbonate with a median particle size of 2.5 μm, 21 parts of calcium carbonate with a median diameter of 11 μm, 0.25 parts of calcium stearate, and 0.6 parts of zinc stearate were mixed uniformly in a kneader, and the previously prepared resin was added. paste, after mixing, add 13.5 parts of chopped glass fibers with a length of 6 mm, and knead for 8 minutes to obtain a BMC bulk molding compound. The BMC material prepared in this way is used to inject the car light reflector substrate on the injection molding machine, the mold is ...

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PUM

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Abstract

The invention provides a bulk moulding compound (BMC) and a preparation method thereof. The material is solidified at certain speed in an injection mould, prevents surface deficiencies, such as ripples, pinholes, pockmarks, scorching, etc., does not reduce the production capability because of too long solidifying time, so the obtained BMC material can be adaptive to all kinds of injection moulds. The invention also provides an automobile lamp reflector substrate processed by such bulk moulding compound and a processing method thereof. The obtained reflector substrate not only has excellent heat resistance and mechanical strength, but also can form a neat and smooth reflective mirror without ripples and other surface deficiencies on the surface through aluminum evaporation plating. Even if the temperature of the mould is as low as 150 DEG C to 160 DEG C, satisfying effect can still be obtained.

Description

technical field [0001] The invention relates to the technical field of materials, and more specifically, the invention relates to a bulk molding compound (BMC) for injection molding of vehicle lamps, a preparation method and an application thereof. Background technique [0002] The reflectors of headlamps (headlamps) and fog lamps for vehicles were manufactured by stamping metal plates in the early days, which required multiple processes, and complex reflective surfaces could not be processed. With the continuous development of automobile technology, modern car light reflectors are made of polymer materials through molds, so that precise reflective surfaces can be obtained. However, due to the severe heat generated by the light source of the car light, it is required that the base material of the reflector has good heat resistance and will not be deformed when heated. Common thermoplastic polymer materials, such as polycarbonate and other engineering plastics, cannot meet t...

Claims

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Application Information

Patent Timeline
24 Sep 2008
Publication
CN101270216A
IPC
C08L51/08; C08K7/14; B29C45/76; B29C45/73; F21V7/22; C08K3/26
Inventors
杜强国; 潘宝荣