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SMC (sheet molding compound) material and preparation method thereof

An absorbent and unsaturated technology, used in the field of medium SMC materials and their preparation, can solve the problems of poor surface gloss, large molding shrinkage, difficult product size control, etc., and achieve the effect of high weather resistance and low shrinkage.

Active Publication Date: 2016-08-31
刘良成
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it has disadvantages such as poor surface gloss, large molding shrinkage, and difficult control of product size.

Method used

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  • SMC (sheet molding compound) material and preparation method thereof
  • SMC (sheet molding compound) material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] An embodiment of the SMC material of the present invention, the SMC material includes the following components by weight: 80 parts of unsaturated resin, 90 parts of carbon fiber, 45 parts of low shrinkage agent, 180 parts of inorganic mineral filler, 2 parts of antioxidant 2 parts, 2 parts of UV absorber, 2 parts of curing agent, 3 parts of thickener, 4 parts of release agent, 1 part of wetting and dispersing agent and 2 parts of coupling agent.

[0023] The unsaturated resin is epoxy vinyl resin.

[0024] Described low-shrinkage agent is the mixture of polyvinyl acetate, polystyrene and polymethyl methacrylate, and the weight ratio of described polyvinyl acetate, polystyrene and polymethyl methacrylate is polyvinyl acetate: Polystyrene: polymethyl methacrylate = 1:2:1.

[0025] The inorganic mineral filler is a mixture of 1200-mesh aluminum hydroxide and 1500-mesh aluminum hydroxide at a weight ratio of 1:1.

[0026] The antioxidant is bis(2,4-di-tert-butylphenyl) pe...

Embodiment 2

[0036] An embodiment of the SMC material of the present invention, the SMC material includes the following components by weight: 75 parts of unsaturated resin, 85 parts of carbon fiber, 40 parts of low shrinkage agent, 160 parts of inorganic mineral filler, 2 parts of antioxidant 2 parts, 2 parts of UV absorber, 2 parts of curing agent, 2 parts of thickener, 2 parts of release agent, 1 part of wetting and dispersing agent and 2 parts of coupling agent.

[0037] The unsaturated resin is epoxy vinyl resin.

[0038] Described low-shrinkage agent is the mixture of polyvinyl acetate, polystyrene and polymethyl methacrylate, and the weight ratio of described polyvinyl acetate, polystyrene and polymethyl methacrylate is polyvinyl acetate: Polystyrene: polymethyl methacrylate = 1:2:1.

[0039] The inorganic mineral filler is a mixture of 1200-mesh aluminum hydroxide and 1500-mesh aluminum hydroxide at a weight ratio of 1:1.

[0040]The antioxidant is bis(2,4-di-tert-butylphenyl) pen...

Embodiment 3

[0050] An embodiment of the SMC material of the present invention, the SMC material includes the following components by weight: 85 parts of unsaturated resin, 95 parts of carbon fiber, 50 parts of low shrinkage agent, 200 parts of inorganic mineral filler, 3 parts of antioxidant 4 parts, 4 parts of UV absorber, 4 parts of curing agent, 4 parts of thickener, 5 parts of release agent, 2 parts of wetting and dispersing agent and 4 parts of coupling agent.

[0051] The unsaturated resin is epoxy vinyl resin.

[0052] Described low-shrinkage agent is the mixture of polyvinyl acetate, polystyrene and polymethyl methacrylate, and the weight ratio of described polyvinyl acetate, polystyrene and polymethyl methacrylate is polyvinyl acetate: Polystyrene: polymethyl methacrylate = 1:2:1.

[0053] The inorganic mineral filler is a mixture of 1200-mesh aluminum hydroxide and 1500-mesh aluminum hydroxide at a weight ratio of 1:1.

[0054] The antioxidant is bis(2,4-di-tert-butylphenyl) p...

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PUM

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Abstract

The invention provides an SMC (sheet molding compound) material. The SMC material is prepared from the following components in parts by weight: 65 to 95 parts of unsaturated polyester resin, 65 to 135 parts of carbon fibers, 35 to 50 parts of low shrinkage agent, 140 to 210 parts of inorganic mineral filler, 1 to 3 parts of antioxidant, 1 to 4 parts of UV (ultraviolet) adsorbent, 1 to 4 parts of curing agent, 1 to 4 parts of thickening agent, 2 to 10 parts of demolding agent, 1 to 4 parts of wetting and dispersing agent, and 1 to 4 parts of coupling agent. The SMC material has the advantage that by adopting particular components and component ratios, the several types of special low shrinkage agents and several types of special UV adsorbents are compounded, so that the weather-resistant property is higher, and the shrinkage rate is lower.

Description

technical field [0001] The invention relates to a material, in particular to a medium SMC material and a preparation method thereof. Background technique [0002] Plastic materials deteriorate over time when exposed to natural environmental conditions. Studying the aging and anti-aging of plastic materials is a very practical problem, and it is also a very complicated problem. During the processing, storage and use of plastic materials, due to the combined effects of internal and external factors, their performance gradually deteriorates, so that they lose their use value. This is an irreversible change, which is a common problem of polymer materials. However, it is possible to study the aging process of plastic materials and take appropriate anti-aging measures to improve the anti-aging performance of the material and delay the aging rate to achieve the purpose of prolonging the service life. A measure to prevent aging, a chemical modification of the polymer structure its...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/10C08L31/04C08L25/06C08L33/12C08K13/04C08K7/06C08K5/134C08K5/132C08K5/3475
CPCC08L63/10C08L2205/035C08L31/04C08L25/06C08L33/12C08K13/04C08K7/06C08K5/1345C08K5/132C08K5/3475
Inventor 刘良成
Owner 刘良成