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Chopped glass fiber sizing agent for bulk molding compounds (BMC) for reinforcing thermosetting resin

A chopped glass fiber and sizing technology, which is applied in the field of chopped glass fiber sizing for BMC that reinforces thermosetting resins, can solve the problems of high mechanical strength of BMC products, and achieve high strength, good appearance, and good compatibility.

Active Publication Date: 2013-03-20
JUSHI GRP CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the fact that the existing sizing agent cannot effectively solve the conflicting problems among chopped glass fiber fluidity, hairiness, product appearance, and product strength, the invention provides a chopped glass fiber sizing agent for BMC that reinforces thermosetting resins. The sizing agent The produced glass fiber yarn has good bundleability, easy chopping, good compatibility with thermosetting resin, high mechanical strength of BMC products, good molding fluidity, smooth appearance of products, and no glass fiber exposure

Method used

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Embodiment Construction

[0045] The technical scheme of the present invention will be further described below with specific examples, but protection scope of the present invention is not limited to this:

[0046] See Table 1. In these examples, in order to meet the requirements of the bunching of chopped glass fibers, improve the chopping properties, improve the fluidity and uniformity of BMC dough, and improve the yield, we choose Jushi Chemical Branch to produce self-crosslinking polyurethane Emulsion TX-826 (referred to as emulsion binder A) and medium and high molecular weight epoxy emulsion TX-208 (referred to as emulsion binder B) produced by Jushi Chemical Branch Plant are mixed as a binder. Emulsion binder A is a self-crosslinking polyurethane emulsion, the emulsion particle size is between 0.3 and 2.5 microns, the acetone dissolution rate is 25-40%, the Tg is between -44 and -10°C, and the solid content is 40%. Emulsion binder B is a medium-high molecular weight epoxy emulsion, preferably a f...

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PUM

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Abstract

The invention discloses a chopped glass fiber sizing agent for reinforcing thermosetting resin, which is prepared by the components by weight percent: (1) 0.2-1.5% of coupling agent; (2) 3.0-20.0% of binding agent that is cross-linked polyurethane emulsion or the mixture of the cross-linked polyurethane emulsion and medium and high molecular weight epoxy emulsion, wherein the contents of the cross-linked polyurethane emulsion and the medium and high molecular weight elastic epoxy ester emulsion are based on the respective solid content; (3) 0.0-1.2% of lubricating agent; (4) 0.05-0.8% of antistatic agent; (5) 0.1-2% of pH value conditioning agent; and (6) the balance of deionized water, wherein the total weight of all the components is 100%. The chopped glass fiber sizing agent improves the bundling property of chopped glass fiber, reduces the broken filament, improves the mixing uniformity and the fluidity of the glass fiber and the BMC resin paste, and improves the mechanical strength and the appearance performance of BMC products.

Description

(1) Technical field [0001] A chopped glass fiber sizing for BMC that reinforces thermosetting resins, such as unsaturated polyester resins, epoxy resins, phenolic resins, polyurethanes, etc. (2) Background technology [0002] BMC Bulk molding compound is the abbreviation of Bulk molding compounds, that is, bulk molding compound, which is often called glass fiber reinforced resin bulk molding compound in China. Glass fiber reinforced BMC bulk molding compound has excellent electrical properties, heat resistance, chemical corrosion resistance, and is suitable for various molding processes, which can meet the performance requirements of various products, so it is more and more popular among users . BMC bulk molding compound is made of unsaturated polyester or phenolic resin, glass fiber, filler, pigment, additives and other main and auxiliary materials, which are mixed and processed by special equipment and specific technology. This product has excellent electrical insulation...

Claims

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Application Information

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IPC IPC(8): C03C25/32
Inventor 叶凤林张志坚李焕兴章建忠曹国荣
Owner JUSHI GRP CO
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