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High-weather-proof bulk molding compound

A technology of bulk molding compound and high weather resistance, which is applied in the field of materials and can solve problems such as cracking, brittleness, and easy yellowing, and achieve high weather resistance

Inactive Publication Date: 2015-09-23
JIANGSU ZHAOJUN NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a high-weather-resistant bulk molding compound to solve the problems of existing products such as easy yellowing, brittleness, cracking and performance degradation.

Method used

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  • High-weather-proof bulk molding compound

Examples

Experimental program
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Embodiment 1

[0020] A high-weather-resistant bulk molding compound (BMC), which is obtained by polymerization of the following raw materials in parts by weight, wherein:

[0021]

[0022]

[0023] The preparation steps are as follows:

[0024] 1. Preparation of resin paste:

[0025] Pour 1,4-cyclohexanedicarboxylic acid-type unsaturated polyester and PVAc into stainless steel containers respectively, turn on the high-speed disperser and set the speed to 1200 rpm, and stir for 2 minutes; add TBPB, at 1200 rpm Speed ​​to medium for 8 minutes.

[0026] 2. Kneading:

[0027] Add calcium carbonate and zinc stearate into the kneader, close the kneader cover, beat the kneading rollers at a fast speed, knead for 5 minutes, pour the resin paste mixed in step 2, knead for 6 minutes at a fast speed, and then add Glass fiber, kneader speed to slow, kneading for 9 minutes. Just pack it out.

[0028] 3. Press standard mechanical property test strips. Use the ultraviolet weathering accelerate...

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PUM

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Abstract

The invention discloses a high-weather-proof bulk molding compound. The high-weather-proof bulk molding compound comprises, by weight, 50-90 parts of hexahydrophthalic acid type unsaturated resin, 10-50 parts of low-shrinkage agents, 1-2 parts of curing agents, 2-6 parts of release agents, 2-6 parts of cross-linking agents, 80-250 parts of inorganic filler, and 40-150 parts of fiberglass. Compared with the prior art, the high-weather-proof bulk molding compound has the advantages that weather resistance is quite high, mechanical property, physical property and chemical property can be maintained for a long time in any environments, and yellowing, embrittlement, cracking and performance reduction are avoided.

Description

technical field [0001] The invention belongs to the field of materials, and in particular relates to a high weather resistance bulk molding compound. Background technique [0002] After the unsaturated polyester resin (UPR) is cured, aging phenomena such as yellowing, surface tarnishing, brittleness and even cracking will occur during use, and its mechanical properties and other physical and chemical properties will also decline. There are many factors that cause material aging, among which the most important external factors are ultraviolet rays, humid environment, and temperature changes, and the benzene ring in the general UPR molecular structure is an important internal factor that ultraviolet rays can promote its aging. This is because its molecular chain contains a phenyl functional group structure, which is easy to absorb light quantum excitation, which causes the molecular chain to undergo reactions such as bond breaking and cross-linking. The cycloadipic acid type ...

Claims

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Application Information

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IPC IPC(8): C08F283/01C08K13/04C08K5/098C08K3/22C08K3/26C08K7/14C08L67/06C08L31/04C08L25/06C08L33/12C08L23/06C08L27/06
Inventor 鲁平才赵腾飞赵钎
Owner JIANGSU ZHAOJUN NEW MATERIAL CO LTD
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