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Polyester molding compound and preparation method thereof

A molding compound and polyester technology, which is applied in the field of polyester molding compound and its preparation, can solve the problems of surface yellowing, unsatisfactory use, and affecting the use effect of parts, and achieve the effect of reducing the content

Inactive Publication Date: 2013-01-09
宁波华缘复合新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For example, the shell of an electric iron, the door of a microwave oven / oven, kitchen utensils, and some parts exposed to high-temperature environments. The surface of ester molding plastics will turn yellow under long-term high temperature, which will affect the use effect of parts and make them unsatisfactory in the use of some parts

Method used

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  • Polyester molding compound and preparation method thereof
  • Polyester molding compound and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Weigh the components according to the formula: 70 parts of unsaturated polyester resin, 30 parts of Palapreg H 870-901, 200 parts of aluminum hydroxide powder, 6 parts of HD-S, 1 part of Luperox TBICM75, 1 part of calcium hydroxide powder, BYK- 6 parts of P9080, 60 parts of 6mm glass fiber, the above-mentioned parts are parts by weight.

[0023] According to the above formula, pour the unsaturated polyester resin, low shrinkage additive, initiator, and internal release agent into the kneader and knead for 2 minutes; then add inorganic mineral fillers, white pigments and calcium hydroxide micropowder and knead for 40 minutes; Finally, glass fiber is added, and the polyester molding compound of the present invention can be obtained after kneading for 10 minutes.

[0024] The following table 1 shows the effect of different low shrinkage additives on yellowing after 7 days of testing at 160 degrees Celsius under the condition that the dosage of other components remains unch...

Embodiment 2

[0029] Weigh the components according to the formula: 60 parts of unsaturated polyester resin, 40 parts of Palapreg H 851-02, 250 parts of calcium carbonate micropowder, 2 parts of HD-S, 2 parts of Luperox 256, 0.6 part of calcium hydroxide micropowder, BYK-P90652 Parts, 50 parts of 3mm glass fibers, the above-mentioned parts are parts by weight.

[0030] According to the above formula, first pour the unsaturated polyester resin, low shrinkage additive, initiator, and internal release agent into the kneader and knead for 5 minutes; then add inorganic mineral fillers, white pigments and calcium hydroxide micropowder and knead for 30 minutes; Add glass fiber at last, after mixing for 7 minutes, the polyester molding compound of the present invention can be obtained

[0031] Under the condition that other components are constant, test the influence of different initiator types on yellowing after 7 days at 160 degrees Celsius:

[0032] The results are shown in Table 2:

[0033] ...

Embodiment 3

[0037] Weigh the components according to the formula: 65 parts of unsaturated polyester resin, 35 parts of Palapreg H 2073 calcium carbonate micropowder 120 parts, aluminum hydroxide micropowder 100 parts, HD-S 4 parts, Luperox TBEC 1.5 parts, calcium hydroxide micropowder 0.8 Parts, 4 parts of BYK-P9050, 35 parts of 12mm glass fiber, 10 parts of 3mm glass fiber, the above-mentioned parts are parts by weight.

[0038] According to the above formula, first pour the unsaturated polyester resin, low shrinkage additive, initiator, and internal mold release agent into the kneader and knead for 3 minutes; then add inorganic mineral fillers, white pigments and calcium hydroxide micropowder and knead for 35 minutes; Add glass fiber at last, after kneading for 5 minutes, the polyester molding compound of the present invention can be obtained

[0039] The dosage of other components remains unchanged, and the influence of different internal mold release agents on yellowing after 7 days a...

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Abstract

The invention discloses a polyester molding compound which is characterized by comprising the following components in parts by weight: 60-70 parts of unsaturated polyester resin, 30-40 parts of low-shrinkage additive, 200-250 parts of inorganic mineral filler, 2-6 parts of white pigment, 1-2 parts of initiator, 0.6-1 part of calcium hydroxide micropowder, 2-6 parts of internal releasing agent and 45-60 parts of glass fiber. The invention also discloses a preparation method of the polyester molding compound. The polyester molding compound disclosed by the invention has better yellowing resistance than the common polyester molding compound.

Description

technical field [0001] The invention relates to a polyester molding compound and a preparation method thereof. Background technique [0002] Due to its high production efficiency, excellent insulation performance, low density, high strength, corrosion resistance, and good weather resistance, polyester molding compounds have been widely used in transportation and electrical fields since their birth to replace steel parts that are prone to corrosion , and thermoplastic parts with low flammable strength. [0003] At the same time, because polyester molding compound has certain characteristics such as corrosion resistance, good stain resistance, non-toxic and harmless, it is also widely used in the field of civilian products such as sanitary ware, tableware, and home appliances. [0004] For example, the shell of an electric iron, the door of a microwave oven / oven, kitchen utensils, and some parts exposed to high-temperature environments. The surface of ester molding plastics ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/06C08K13/04C08K3/22C08K3/26C08K3/30C08K7/14
Inventor 俞碧波张文武张宵华
Owner 宁波华缘复合新材料有限公司
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