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Insulating flame-retardant bulk molding compound and preparation method thereof

A bulk molding compound, flame-retardant technology, applied in the direction of insulators, organic insulators, plastic/resin/wax insulators, etc., can solve the problems of high-end automobiles and home appliance parts relying on imports and need to be improved, and achieve good modification effects , Improve the effect of insulation and flame retardancy

Pending Publication Date: 2019-04-05
镇江利德尔复合材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the conventional bulk molding compound can meet the basic performance requirements, its products still need to be improved in terms of high standards and high requirements, especially the requirements for high insulation, h

Method used

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  • Insulating flame-retardant bulk molding compound and preparation method thereof
  • Insulating flame-retardant bulk molding compound and preparation method thereof
  • Insulating flame-retardant bulk molding compound and preparation method thereof

Examples

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preparation example Construction

[0059] The present invention also provides a method for preparing an insulating and flame-retardant bulk molding compound, comprising the following steps:

[0060] Step 1: Preparation of unsaturated polyester,

[0061] It is formed by prepolymerization of polyether polyol and isocyanate, and co-curing and crosslinking with chain extender, catalyst, uncured unsaturated polyester and initiator to form unsaturated polyester interpenetrating network;

[0062] The polyether polyol is polytetrahydrofuran diol; the isocyanate is toluene diisocyanate or diphenylmethane diisocyanate; the chain extender is 1,4-butanediol; the catalyst is dibutyltin dilaurate; the initiator is peroxide Dibenzoyl;

[0063] The prepared unsaturated polyester is one or a composite of m-phenylene unsaturated resin, o-phthalic unsaturated resin, epoxy resin and vinyl unsaturated resin.

[0064] Step 2: Prepare modified inorganic flame retardant filler,

[0065] Add organosilane coupling agent or titanate c...

Embodiment 1

[0078] Step 1: Preparation of Unsaturated Polyester

[0079] Prepolymerize polytetrahydrofuran diol with toluene diisocyanate, then co-cure with 1,4-butanediol, dibutyltin dilaurate, and uncured unsaturated polyester and dibenzoyl peroxide to form unsaturated Polyester interpenetrating network.

[0080] Step 2: Prepare modified inorganic flame retardant filler,

[0081] Add organosilane coupling agent or titanate coupling agent containing pyrophosphate group to the mixture of hollow glass microspheres, nano-aluminum hydroxide and nano-magnesium hydroxide, control the stirring speed to 26r / s, and the stirring temperature is 40°C, and the stirring time satisfies:

[0082]

[0083] Step 3: After stirring and mixing 30 parts of unsaturated polyester, 2 parts of thickener, 2 parts of auxiliary agent and 6 parts of internal mold release agent, slowly add 25 parts of modified inorganic flame retardant filler, 15 parts of silicone flame retardant 1 part and 20 parts of reinforci...

Embodiment 2

[0092] Step 1: Preparation of Unsaturated Polyester

[0093] Prepolymerize polytetrahydrofuran diol with toluene diisocyanate, then co-cure with 1,4-butanediol, dibutyltin dilaurate, and uncured unsaturated polyester and dibenzoyl peroxide to form unsaturated Polyester interpenetrating network.

[0094] Step 2: Prepare modified inorganic flame retardant filler,

[0095] Add organosilane coupling agent or titanate coupling agent containing pyrophosphate group to the mixture of hollow glass microspheres, nano-aluminum hydroxide and nano-magnesium hydroxide, control the stirring speed to 30r / s, and the stirring temperature is 45°C, and the stirring time satisfies:

[0096]

[0097] Step 3: After stirring and mixing 50 parts of unsaturated polyester, 1 part of thickener, 1 part of auxiliary agent and 3 parts of internal release agent, slowly add 25 parts of modified inorganic flame retardant filler, 10 parts of silicone flame retardant 10 parts and 10 parts of reinforcing fi...

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Abstract

The invention discloses an insulating flame-retardant bulk molding compound which comprises, by mass, 25-50 parts of unsaturated polyester, 25-50 parts of modified inorganic flame-retardant fillers, 10-25 parts of organic silicon flame retardant, 10-20 parts of reinforced fiber, 0.8-2 parts of thickeners, 1-2 parts of additives, and 3-6 parts of internal releasing agents. With adding of the modified inorganic flame-retardant fillers and the reinforced fiber, insulativity and flame retardance of the bulk molding compound are improved on the basis of not changing its mechanical performance. Theinvention further provides a preparation method of the insulating flame-retardant bulk molding compound. According to the preparation method, the stirring speed after slowing adding of the modified inorganic flame-retardant fillers, the organic silicon flame retardant and the reinforced fiber and the mold closing pressure are controlled precisely, so that mixing uniformity of the modified inorganic flame-retardant fillers and the reinforced fiber is improved, and insulativity and flame retardance of the bulk molding compound are improved.

Description

technical field [0001] The invention relates to the technical field of bulk molding compound, more specifically, the invention relates to an insulating and flame-retardant bulk molding compound and a preparation method thereof. Background technique [0002] With the growth and popularization of new material products, the corresponding new composite material products are more and more popular among the public. Among them, bulk molding compound (BMC) has excellent electrical properties, mechanical properties, heat resistance, and chemical corrosion resistance. , not only adapt to various molding processes, but also meet the performance requirements of various products, so it can be widely used in aerospace, automobile industry, transportation, electronic equipment, electrical appliances, machinery manufacturing, construction and other fields. [0003] BMC is the acronym for Bulk Molding Compound in English, and the Chinese name is Bulk Molding Compound. BMC is a molded interm...

Claims

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Application Information

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IPC IPC(8): C08L67/06C08L83/08C08L91/06C08L71/02C08K13/06C08K9/06C08K9/04C08K7/28C08K3/22C08K7/06C08K7/14C08K7/10C08K3/32C08K5/098C08G18/48C08G18/42C08G18/32C08G18/66C08G18/58H01B3/42
CPCC08G18/3206C08G18/4045C08G18/4208C08G18/4854C08G18/58C08G18/6607C08G18/7614C08G18/7671C08K2003/2224C08K2003/2227C08K2003/323C08K2201/011C08K2201/014C08L67/06C08L2201/02C08L2205/035H01B3/421C08L83/08C08L91/06C08L71/02C08K13/06C08K9/06C08K9/04C08K7/28C08K3/22C08K7/06C08K7/14C08K7/10C08K3/32C08K5/098
Inventor 谢富平邱丰曹俊
Owner 镇江利德尔复合材料有限公司
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