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Halogen-free flame-proof unsaturated polyester molding compound

An unsaturated, molding compound technology, applied in the field of thermosetting molding compounds, can solve the problems of partial shrinkage, bending strength and impact strength, insufficient flame retardant grade, difficult to achieve, etc., to achieve low shrinkage, good flame retardant effect, electrical Excellent performance

Active Publication Date: 2009-01-14
常熟东南塑料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As disclosed in the patent CN1865348, by adding a phosphonate flame retardant when synthesizing the resin matrix, the insulating impregnating resin has flame retardancy, a halogen-free flame-retardant insulating impregnating resin, but this resin only focuses on burning or No poisonous gas and dense smoke are produced in the pyrolysis process, that is, only focusing on higher flame retardant efficiency and small smoke volume, so some aspects such as shrinkage, bending strength and impact strength are neglected, especially in practical applications. The embarrassment that the flame retardant level is not enough, for example, it is difficult to meet the requirements of UL-94-V-O

Method used

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  • Halogen-free flame-proof unsaturated polyester molding compound

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 18.5 parts of o-phthalic unsaturated polyester resin;

[0027] 11.5 parts of polyvinyl acetate (PVAc);

[0028] 0.32 parts of tert-butyl peroxybenzoate;

[0029] 0.003 parts of p-benzoquinone;

[0030] 0.23 parts of magnesium oxide;

[0031] 68 parts of aluminum hydroxide;

[0032] 10.5 parts of melamine cyanurate;

[0033] 4.5 parts of zinc borate;

[0034] 1.4 parts of calcium stearate;

[0035] Glass fiber 15.2 parts.

[0036] During specific implementation, at first the ortho-phthalic unsaturated polyester resin of the above ratio and PVAc namely polyvinyl acetate (also known as polyvinyl acetate) are added in the beater, stirred rapidly for 5 minutes, then added the p-benzoquinone of the above ratio , magnesium oxide and tert-butyl peroxybenzoate continue to stir for 25 minutes to obtain a uniform slurry, then move the evenly stirred slurry into a kneader and knead for 5 minutes, then add the melamine cyanurate in the above ratio in turn , zinc borate, calc...

Embodiment 2

[0038] 18.8 parts of isophthalic unsaturated polyester resin;

[0039] 13 parts of polymethyl methacrylate (PMMA);

[0040] 0.4 parts of tert-butyl peroxybenzoate;

[0041] 0.005 parts of p-phenol;

[0042] 0.12 parts of magnesium oxide;

[0043] 70 parts of calcium carbonate;

[0044] 12 parts of melamine phosphate;

[0045] 4.3 parts of antimony trioxide;

[0046] Zinc stearate 1.5 parts;

[0047] Glass fiber 17.5 parts.

[0048] During specific implementation, at first the m-benzene type unsaturated polyester resin of the above-mentioned ratio and PMMA namely polymethyl methacrylate are added in the beater, stirred for 5 minutes, then added p-phenol, magnesium oxide and benzoic acid peroxide of the above-mentioned ratio Continue to stir tert-butyl ester for 25 minutes to obtain a uniform slurry. Then, move the uniformly stirred slurry into a kneader and knead for 5 minutes, and then add the above-mentioned proportions of melamine phosphate, antimony trioxide, and zin...

Embodiment 3

[0050] 19.4 parts of bisphenol A type unsaturated polyester resin;

[0051] 12.3 parts of polyvinyl acetate (PVAc);

[0052] 0.45 parts of tert-butyl peroxybenzoate;

[0053] 0.004 parts of p-benzoquinone;

[0054] 0.15 parts of magnesium oxide;

[0055] 75 parts of aluminum hydroxide;

[0056] 11 parts of ammonium polyphosphate;

[0057] 2.5 parts of melamine cyanurate;

[0058] 3.8 parts of antimony trioxide;

[0059] 1.7 parts of magnesium stearate;

[0060] Glass fiber 17 parts.

[0061] During specific implementation, at first the bisphenol A type unsaturated polyester resin of the above-mentioned proportion and PVA c namely polyvinyl acetate are added in the beater, stirred for 5 minutes, then added p-benzoquinone, magnesium oxide and peroxide of the above-mentioned proportion The tert-butyl benzoate continued to stir for 25 minutes to obtain a uniform slurry. Then, the uniformly stirred slurry was moved into a kneader and kneaded for 5 minutes, and then the ammo...

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Abstract

The invention relates to halogen-free flame retardant unsaturated polyester molding compound, which is made of the raw materials according to the part by weight: unsaturated polyester resin accounting for 18.2 parts to 20.5 parts; additive agent accounting for 11.2 parts to 13.3 parts; initiating agent accounting for 0.3 part to 0.55 part; polymerization inhibitor accounting for 0.003 part to 0.005 part; thickening agent accounting for 0.1 part to 0.25 part; filling material accounting for 68 parts to 75 parts; phosphate accounting for 10.2 parts to 14.8 parts; metal oxide accounting for 2.7 parts to 4.6 parts; mould release agent accounting for 1.4 parts to 1.7 parts and reinforced fibers accounting for 15 parts to18 parts. The halogen-free flame retardant unsaturated polyester molding compound has the advantages that the flame retardant effect is good, the intensity is high, the shrinkage is low, the electrical property is excellent, and the halogen-free flame retardant unsaturated polyester molding compound is safe to human body and is environmental friendly due to the flame retardant and halogen-free properties and can be applied to switches, the casing bodies of daily electric appliances and other fabricated parts.

Description

technical field [0001] The invention belongs to the technical field of thermosetting molding compounds, in particular to a halogen-free flame-retardant unsaturated polyester molding compound. technical background [0002] Unsaturated polyester molding compound has the advantages of high specific strength, good electrical properties and easy molding and processing, and is widely used by people. With the continuous application of unsaturated polyester molding compounds in household appliances, the requirements for flame retardancy of molding compounds are getting higher and higher. The traditional way to obtain the flame retardancy of the molding compound is to add a certain amount of halogen flame retardant to meet the application requirements. With the restrictions on halogenated flame retardants and the requirements for environmental protection, more and more molding materials have reduced the use of such halogenated flame retardants. As disclosed in the patent CN1865348,...

Claims

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Application Information

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IPC IPC(8): C08L67/06C08K13/04C08K3/32C08K5/3492C08K5/52C08K3/22C08K3/38C08J5/04
Inventor 张文军王康建孙理玉须志英魏卫王可强
Owner 常熟东南塑料有限公司
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