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Polyester molding plastic and preparation method thereof

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

Inactive Publication Date: 2014-04-16
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 plastic and preparation method thereof
  • Polyester molding plastic and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Weigh according to the formula measurement components: 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 parts are parts by weight.

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

[0024] Table 1 below shows the effect of different low-shrinkage additives on yellowing after 7 days at 160 degrees Celsius under the condition that the dosages of other components remain unchanged:

[0025] Table 1

[0026]

[...

Embodiment 2

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

[0030] According to the above formula, first pour the unsaturated polyester resin, low shrinkage additives, initiator, internal release agent into the kneader and mix for 5 minutes; then add inorganic mineral fillers, white pigments and calcium hydroxide powder and mix for 30 minutes; Finally, add glass fiber and mix for 7 minutes to obtain the polyester molding compound of the present invention

[0031] With the other components unchanged, test the effect of different initiator types on yellowing after 7 days at 160 degrees Celsius:

[0032] The results are shown in Table 2:

[0033] Table 2

[0034]

[0035] It can be seen from the data shown in the above...

Embodiment 3

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

[0038] According to the above formula, first pour the unsaturated polyester resin, low shrinkage additives, initiator, internal release agent into the kneader and mix for 3 minutes; then add inorganic mineral fillers, white pigments and calcium hydroxide powder and mix for 35 minutes; Finally, add glass fiber and mix for 5 minutes to obtain the polyester molding compound of the present invention

[0039] The dosage of other components remains unchanged, and the effect of different internal mold release agents on yellowing is tested after 7 days at 160 degrees Celsius:

[0040] The...

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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, good weather resistance, etc., polyester molding compounds have been widely used in transportation and electrical fields since their birth to replace and replace easily rusty steel parts. , And thermoplastic parts with flammability and low strength. [0003] At the same time, because polyester molding compound has specific characteristics such as corrosion resistance, good stain resistance, non-toxic and harmless, etc., it is also widely used in the field of civilian products such as bathroom, tableware, and home appliances. [0004] For example, the shell of an electric iron, the door of a microwave / oven, kitchen utensils, and some parts that are exposed to high temperature environments. The common point of these parts is ...

Claims

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Application Information

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Patent Type & Authority Patents(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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