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Environment-friendly bulk molding compound and preparation method thereof

An environmentally friendly technology for bulk molding compounds, applied in the field of bulk molding compounds, which can solve problems such as environmental pollution, high vapor pressure, and high toxicity

Inactive Publication Date: 2019-03-08
WUXI XINHONGTAI ELECTRIC TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Styrene, as a solvent and cross-linking monomer for the preparation of bulk molding compounds, has the advantages of good dilution, high reactivity, and low price, but it also has disadvantages such as high vapor pressure, volatile, and high toxicity, which will harm operators. damage to health and also pollute the environment

Method used

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  • Environment-friendly bulk molding compound and preparation method thereof
  • Environment-friendly bulk molding compound and preparation method thereof
  • Environment-friendly bulk molding compound and preparation method thereof

Examples

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Effect test

Embodiment 1

[0051] This embodiment provides an environment-friendly bulk molding compound, which includes the following raw material components in parts by weight:

[0052]

[0053]

[0054] Wherein, the unsaturated polyester resin liquid is composed of ethylene glycol phthalate and cyclohexyl methacrylate in a mass ratio of 70:30, and the low shrinkage agent is composed of polystyrene and methyl methacrylate in a mass ratio of 45: 55 components, the length of the alkali-free glass fiber is 12mm.

[0055] The preparation method of the above-mentioned environment-friendly bulk molding compound is as follows:

[0056] (1) Add polystyrene powder and methyl methacrylate into a high-speed disperser, mix at a speed of 500r / min for 60min, and stand at 20°C for 24h to obtain a low-shrinkage agent;

[0057] (2) Add the unsaturated polyester resin liquid, the low-shrinkage agent and the initiator obtained in step (1) into a high-speed disperser, and mix for 4 minutes at a rotating speed of 9...

Embodiment 2

[0060] This embodiment provides an environment-friendly bulk molding compound, which includes the following raw material components in parts by weight:

[0061]

[0062]

[0063] Among them, the unsaturated polyester resin liquid is composed of propylene glycol isophthalate and methylcyclohexyl methacrylate in a mass ratio of 60:40, and the low shrinkage agent is composed of polystyrene and methyl acrylate in a mass ratio of 40:60 , the length of the alkali-free glass fiber is 6 mm, and the mesh number of the zinc stearate powder is 200 mesh.

[0064] The preparation method of the above-mentioned environment-friendly bulk molding compound is as follows:

[0065] (1) Add polystyrene powder and methyl acrylate into a high-speed disperser, mix at a speed of 800r / min for 30min, and stand at 30°C for 12h to obtain a low-shrinkage agent;

[0066] (2) Add the unsaturated polyester resin liquid, the low-shrinkage agent, initiator and sizing agent obtained in step (1) into a hig...

Embodiment 3

[0069] This embodiment provides an environment-friendly bulk molding compound, which includes the following raw material components in parts by weight:

[0070]

[0071] Among them, the unsaturated polyester resin liquid is composed of neopentyl glycol isophthalate and cyclohexyl methacrylate in a mass ratio of 65:35, and the low shrinkage agent is composed of polystyrene and ethyl methacrylate in a mass ratio of 42 : 58 composition, the length of alkali-free glass fiber is 10mm, and the order number of zinc stearate powder is 500 orders.

[0072] The preparation method of the above-mentioned environment-friendly bulk molding compound is as follows:

[0073] (1) Add polystyrene powder and ethyl methacrylate to a high-speed disperser, mix at a speed of 600r / min for 45min, and stand at 25°C for 18h to obtain a low-shrinkage agent;

[0074] (2) Add the unsaturated polyester resin liquid, the low-shrinkage agent obtained in step (1), the initiator and the sizing agent into the...

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Abstract

The invention provides an environment-friendly bulk molding compound and a preparation method thereof. The bulk molding compound comprises raw material components in parts by weight as follows: 60-70parts of an unsaturated polyester resin solution, 30-40 parts of a low-shrinkage agent, 110-130 parts of packing, 60-70 parts of reinforced fibers, 0.5-1 part of a thickening agent and 1-1.5 parts ofan initiator; the unsaturated polyester resin solution is prepared from unsaturated polyester resin and alicyclic acrylate, and the low-shrinkage agent is prepared from polystyrene and (methyl) acrylate. The bulk molding compound is prepared by steps as follows: the unsaturated polyester resin solution, the low-shrinkage agent and the initiator are firstly mixed, resin paste is formed, then the resin paste, the packing, the thickening agent and the reinforced fibers are added to a kneading machine and kneaded, and the bulk molding compound is obtained. The bulk molding compound is more environmentally friendly without adoption of a styrene raw material, and shrinking percentage, impact strength and electric strength are comparable with those of a bulk molding compound adopting styrene as across-linking monomer.

Description

technical field [0001] The invention belongs to the technical field of bulk molding compound, and in particular relates to an environment-friendly bulk molding compound and a preparation method thereof. Background technique [0002] Bulk molding compound (BMC for short) is a semi-dry method for manufacturing glass fiber reinforced thermosetting products. It is usually made of unsaturated polyester resin, low shrinkage / low profile additives, initiators, internal mold release agents, mineral fillers etc. are pre-mixed into a paste, then add thickeners, colorants, etc., and mix with glass fibers of different lengths in a special material kettle to thicken, and finally form a doughy intermediate material that can be used for molding and injection molding. According to different end application fields, the formulated composite materials can be precisely controlled in size, have good flame retardancy and tracking resistance, high dielectric strength, corrosion resistance and stai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/06C08L25/06C08K3/26C08K7/14C08K3/22C08K13/02C08F291/06C08F291/00
CPCC08F257/02C08F283/01C08K2003/2224C08K2003/265C08L67/06C08L25/06C08K3/26C08K7/14C08K3/22C08K13/02
Inventor 张颂夏宏伟冯伟祖陈佩娟季玲
Owner WUXI XINHONGTAI ELECTRIC TECH CO LTD
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