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Toluene diisocyanate (TDI)-thickening-modified BMC (Bulk Molding Compound) material and preparation method thereof

A technology of toluene diisocyanate and toluene diisocyanate is applied in the field of toluene diisocyanate thickening and modified BMC material and its preparation, which can solve the problems of high shrinkage rate, poor impact resistance, large UP brittleness, etc. The effect of low rate, high toughness and high impact strength

Inactive Publication Date: 2014-02-05
JIANGSU ZHAOJUN NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, ordinary UP is brittle, resulting in poor impact resistance and high shrinkage of BMC products. These defects greatly limit the application of BMC.

Method used

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  • Toluene diisocyanate (TDI)-thickening-modified BMC (Bulk Molding Compound) material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] unsaturated polyester 60-100 glass fiber 5 polystyrene 30 calcium carbonate 200 Toluene diisocyanate (TDI) 4 TBPB 1 TBPO 0.5 Calcium stearate 4

[0018] Including two processes of resin paste preparation and kneading

[0019] 1) Pour the unsaturated polyester and polystyrene low-shrinkage agents into stainless steel containers respectively, turn on the high-speed disperser and set the speed to 1200 rpm, and stir for two minutes; add several parts of TBPB and TBPO, Rotate at 1 / min for 8 minutes, then add toluene diisocyanate (TDI) and continue stirring for 1 minute.

[0020] 2) 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 I., and knead for 6 minutes at a fast speed , and then add glass fiber, kneader speed to slow, kneading for 9 minutes. Divided into nylon bags in the form of 2...

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Abstract

The invention discloses a toluene diisocyanate (TDI)-thickening-modified BMC (Bulk Molding Compound) material and a preparation method thereof. The BMC material is prepared from vinyl resin, reinforcing fibers, a low-shrink agent, inorganic mineral filler, a curing agent, a thickener, a demolding agent and the like. The thickener is TDI which is commonly-used polyisocyanate, is white liquid, is easy to disperse and can be excellently blended with unsaturated polyester resin, the viscosity of resin paste can be lowered effectively, and then, the immersion of glass fibers is facilitated. The method comprises preparing the resin paste and kneading, and the prepared BMC material has the characteristics of low shrinkage, high impact strength and high toughness and can be applied to the fields of automobiles, buildings, electronics, electrical appliances and the like.

Description

technical field [0001] The invention belongs to the field of bulk molding compound materials, in particular to a tough material with low shrinkage rate and high impact strength, specifically a toluene diisocyanate thickened modified BMC material and a preparation method thereof. Background technique [0002] The abbreviation of BMC material Bulk molding compounds, that is, bulk molding compound. It is often called unsaturated polyester bulk molding compound in China. Its main raw materials are GF (chopped glass fiber), UP (unsaturated resin), MD (filler) and various additives that are fully mixed into a dough-like prepreg. BMC materials were first applied in the former West Germany and the United Kingdom in the 1960s, and then developed in the United States and Japan in the 1970s and 1980s. Because BMC bulk molding compound has excellent electrical properties, mechanical properties, heat resistance, chemical corrosion resistance, and adapts to various molding processes, ...

Claims

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Application Information

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IPC IPC(8): C08G18/68C08G18/76C08L75/14C08L31/04C08L25/06C08K13/04C08K7/14C08K7/06C08K7/12C08K3/04C08K3/08C08K3/26C08K3/34C08K3/22C08K5/098
CPCC08G18/68C08G18/7614C08G2270/00C08L75/14C08L2205/04
Inventor 鲁平才魏涛赵钎
Owner JIANGSU ZHAOJUN NEW MATERIAL CO LTD
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