Low-density foaming BMC material and preparation method thereof

A low-density, foaming agent technology, applied in the field of low-density foamed BMC materials and its preparation, can solve the problems of reducing BMC, expensive, difficult to disperse fillers, etc., and achieve the goal of reducing density, reducing material costs, and reducing material costs Effect

Pending Publication Date: 2020-11-17
广东百汇达新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, most BMC materials use hollow glass microspheres, carbon fibers and other lightweight fillers to reduce the BMC density. These two methods have the following disadvantages: (1) The price of lightweight fillers such as hollow glass microspheres is relatively expensive, and the BMC produced The material cost is high, which limits the scope of use of the material; (2) lightweight fillers such as hollow glass microspheres have poor compatibility with unsaturated polyester resins, and these fillers are difficult to disperse in unsaturated resins, which is difficult for BMC production operations bring inconvenience

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A low-density foamed BMC material, the raw material components by weight are as follows: 70 parts of unsaturated resin LY-S29802, 1 part of thermal expansion microspheres, 0.2 parts of AC foaming agent, 0.2 parts of OBSH foaming agent, 30 parts of low shrinkage additives , 0.85 parts of polymerization inhibitor, 1.2 parts of wetting and dispersing agent, 4.5 parts of color paste, 1.5 parts of thickener, 1.1 parts of curing agent, 4.5 parts of release agent, 100 parts of aluminum hydroxide, 50 parts of calcium bicarbonate, 60 parts 6mm non-alkali glass fiber.

[0044] The preparation steps of the above-mentioned low-density foamed BMC material are as follows:

[0045] (1) Add the heat-expandable microspheres and foaming agent into the mixing tank equipped with unsaturated resin according to the formula ratio, fully stir in the high-speed shear mixer, control the rotating speed at 1000rpm, and stir for 8 minutes;

[0046] (2) Add low-shrinkage additives, polymerization i...

Embodiment 2

[0054]A low-density foamed BMC material, the raw material components by weight are as follows: 65 parts of unsaturated resin LY-S29802, 1.5 parts of thermal expansion microspheres, 0.25 parts of AC foaming agent, 0.25 parts of OBSH foaming agent, 35 parts of low shrinkage additives , 0.7 parts of polymerization inhibitor, 1.5 parts of wetting and dispersing agent, 4 parts of color paste, 1.5 parts of thickener, 1 part of curing agent, 4 parts of release agent, 120 parts of aluminum hydroxide, 70 parts of calcium bicarbonate, 55 parts 6mm non-alkali glass fiber.

[0055] The preparation steps of the above-mentioned low-density foamed BMC material are as follows:

[0056] (1) Add the pre-treated heat-expandable microspheres and foaming agent according to the formula ratio into the mixing tank equipped with unsaturated resin, fully stir in the high-speed shear mixer, control the rotating speed at 1000rpm, and stir for 5 minutes;

[0057] (2) Add low-shrinkage additives, polymeri...

Embodiment 3

[0065] A low-density foamed BMC material, the raw material components by weight are as follows: 70 parts of unsaturated resin LY-S29802, 1.5 parts of thermal expansion microspheres, 0.35 parts of AC foaming agent, 0.35 parts of OBSH foaming agent, 30 parts of low shrinkage additives , 0.9 parts of polymerization inhibitor, 1 part of wetting and dispersing agent, 4.5 parts of color paste, 1 part of thickener, 1.1 parts of curing agent, 4.5 parts of release agent, 120 parts of aluminum hydroxide, 50 parts of calcium bicarbonate, 20 parts 6mm non-alkali glass fiber.

[0066] The preparation steps of the above-mentioned low-density foamed BMC material are as follows:

[0067] (1) Add the heat-expandable microspheres and foaming agent into the mixing tank equipped with unsaturated resin according to the formula ratio, fully stir in the high-speed shear mixer, control the rotating speed at 1000rpm, and stir for 8 minutes;

[0068] (2) Add low-shrinkage additives, polymerization inh...

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Abstract

The invention discloses a low-density foaming BMC material. The material comprises the following components in parts by weight: 60-70 parts of unsaturated resin, 1-2 parts of thermal expansion microspheres, 0.5-1 part of a foaming agent, 30-40 parts of a low-shrinkage additive, 0.7-1 part of a polymerization inhibitor, 1-2 parts of a wetting dispersant, 3-4.5 parts of color paste, 1-1.5 parts of athickening agent, 1-1.2 parts of a curing agent, 4-5 parts of a release agent, 100-120 parts of aluminum hydroxide, 50-80 parts of calcium bicarbonate and 20-60 parts of glass fibers. According to the invention, the density of the BMC product is effectively reduced, the material cost is greatly reduced, and the obtained BMC material has good mechanical properties and meets the expected low-density requirement.

Description

technical field [0001] The invention belongs to the field of chemical composite materials, and in particular relates to BMC molding compounds, in particular to a low-density foamed BMC material and a preparation method thereof. Background technique [0002] Bulk Molding Compound (BMC) is a thermosetting composite material mixed with saturated polyester resin, organic additives, curing agent, powder filler, thickener and chopped glass fiber. Its molding pressure and molding temperature are both low, which can reduce the investment cost of equipment and molds, and is suitable for processing large-scale components with complex configurations. Because of its excellent electrical properties, mechanical properties, heat resistance, and chemical corrosion resistance, it can meet the performance requirements of various products and has a wide range of applications. [0003] At present, most BMC materials use hollow glass microspheres, carbon fibers and other lightweight fillers to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/06C08K13/04C08K7/14C08K3/22C08K3/26C08J9/32C08J9/10
CPCC08J9/32C08J9/103C08J9/105C08J9/0061C08J9/0085C08J9/0095C08J9/0066C08J2203/04C08J2203/20C08J2203/22C08J2367/06
Inventor 彭新龙周立新陆志华江林鹤梁卓恩
Owner 广东百汇达新材料有限公司
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