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High hydrolysis resistance anti-flaming enhanced polybutylene terephthalate composition and preparation method thereof

A polybutylene terephthalate, hydrolyzable technology is applied in the field of high hydrolysis resistance flame retardant reinforced polybutylene terephthalate composite and its preparation field, and can solve the problem of hydrolysis resistance modification of PBT materials The effect is limited and other problems, to achieve the effect of stable product quality, simple process and high production efficiency

Inactive Publication Date: 2012-10-10
SHANGHAI KINGFA SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Conventional methods, such as reducing the carboxyl group content of PBT resins, increasing the viscosity and increasing the molecular weight, have very limited effects on the anti-hydrolysis modification of PBT materials.

Method used

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  • High hydrolysis resistance anti-flaming enhanced polybutylene terephthalate composition and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Mixer: rotating speed is 650 rpm, twin-screw extruder: screw rotating speed is 350 rpm, average barrel temperature is 230°C, and the length-to-diameter ratio of the twin-screw extruder is 36:1.

[0039] Formula is as follows (parts by weight):

[0040] 100 parts of polybutylene terephthalate with a molecular weight of 25000-30000, 8 parts of ethylene-octene copolymer, 8 parts of acrylate polymer, 18 parts of brominated aromatic flame retardant, 7 parts of antimony trioxide 1 part of lubricant N, N'-ethylene bis stearic acid amide, 2 parts of coupling agent γ-(2,3 glycidoxy) propyltrimethoxysilane; Taishan glass fiber ERS200-T635C 15 parts .

[0041] The preparation method comprises the following steps:

[0042] Polybutylene terephthalate, ethylene-octene copolymer, acrylic polymer, lubricant N, N'-ethylene bisstearic acid amide and coupling agent γ-(2,3 epoxypropylene Oxygen)propyltrimethoxysilane is stirred and mixed, and sent to a twin-screw extruder, and then brom...

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Abstract

The reinforced fireproof polybutylene terephthalate (PBT) composition with high hydrolysis resistance is prepared with PBT 100 weight portions, modifier 5-20 weight portions, main fire retardant 10-30 weight portions, synergistic fire retardant 8-10 weight portions, glass fiber 10-60 weight portions, and machining aid 0.5-5 weight portions. Detection shows that the reinforced fireproof PBT composition after being boiled at 2 atm for 72 hr may have its over 80 % tensile strength and 90 % over dielectric strength maintained, and dielectric strength greater than 22 KV / mm, so that it may be well applied in making high end electric appliance casing for use in humid environment.

Description

technical field [0001] The invention relates to a highly hydrolysis-resistant flame-retardant reinforced polybutylene terephthalate compound and a preparation method thereof. Background technique [0002] Polybutylene terephthalate, referred to as PBT, is polymerized by polycondensation reaction of terephthalic acid and butanediol. Its melting point is 225-235°C, and it is a crystalline material. The mechanical properties of unreinforced PBT are only at the general level, but the various strengths and heat-resistant temperatures are greatly improved after being reinforced with glass fiber. As an engineering plastic, PBT uses glass fiber reinforced products in most cases. [0003] Due to the excellent electrical properties of PBT materials, flame-retardant reinforced PBT materials are widely used in electrical appliances, such as electrical casings, coil bobbins, electrical connectors, and so on. [0004] However, in some special occasions, such as ships, warships or some o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/03C08K9/00B29C47/40C08L23/08C08K7/14
CPCB29C2947/92704B29C2947/9259B29C2948/9259B29C2948/92704
Inventor 陈伟李翰卿苏妤姜苏俊陈大华刘志力
Owner SHANGHAI KINGFA SCI & TECH