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Hydrolysis resistance polybutylene terephthalate

A technology of butylene phthalate and hydrolysis-resistant agent, which is applied in the field of hydrolysis-resistant polybutylene terephthalate, can solve the problems of decline, material mechanical properties decline, molecular chain breaking molecular weight, etc., and achieves expanded application range, improved material properties, improved mechanical strength

Inactive Publication Date: 2015-08-19
QINGDAO WANLI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

However, due to the carboxyl group contained in the PBT molecule, it will be hydrolyzed in a hot and humid environment, which will lead to molecular chain breakage and a decrease in molecular weight, which will reduce the mechanical properties of the material and affect the use.

Method used

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Embodiment Construction

[0015] The technical solutions of the present invention will be further described below in conjunction with specific embodiments.

[0016] A kind of hydrolysis-resistant polybutylene terephthalate, its components by mass percentage ratio are: PBT 73%, glass fiber 15%, MBS 8%, carbodiimide 2%, pyromellitic anhydride 0.8 %, modified ethylene bis fatty acid amide 1%, antioxidant 0.2%. Wherein, the PBT is polybutylene terephthalate resin; the glass fiber is an alkali-free chopped glass fiber with a diameter of 8-15 μm and the surface is treated with a silane coupling agent KH550; the MBS is A methacrylate-butadiene-styrene copolymer with a core-shell structure; the antioxidant is a compound of hindered phenolic antioxidant 1010 and phosphite antioxidant 168 at a mass ratio of 1:1 things.

[0017] The preparation method is as follows: (1) Dry PBT at 120°C-140°C for 4-6 hours, so that the moisture content is controlled below 0.03%, and it is ready for use; (2) Weigh the dried PBT ...

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Abstract

The present invention discloses a hydrolysis resistance polybutylene terephthalate, which comprises, by mass, 70-90% of PBT, 5-15% of glass fibers, 3-8% of MBS, 0.5-2% of a hydrolysis resistance agent, 0.1-1% of pyromellitic dianhydride, 0.5-1% of modified ethylene bis fatty acid amide, and 0.1-0.5% of an antioxidant, wherein the hydrolysis resistance agent is one selected from phenyl glycidyl ether, bisphenol A diglycidyl ether, carbodiimide, and 2-oxazoline. The hydrolysis resistance polybutylene terephthalate of the present invention has the beneficial effects that: with the glass fiber reinforcing and the proper addition of the MBS, the hydrolysis resistance agent, the pyromellitic dianhydride and other auxiliary agents, the mechanical strength, the impact toughness and the hydrolysis resistance of the polybutylene terephthalate are substantially improved, the material performance is well improved, and the application range is expanded.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a hydrolysis-resistant polybutylene terephthalate. Background technique [0002] Polybutylene terephthalate (PBT) is widely used in automobiles, mechanical equipment, and electrical and electronic manufacturing for its excellent heat resistance, fatigue resistance, weather resistance, toughness, and low friction coefficient. It has become an important member of the five major engineering plastics. However, due to the carboxyl group contained in the PBT molecule, it will be hydrolyzed in a hot and humid environment, which will lead to molecular chain breakage and a decrease in molecular weight, resulting in a decrease in the mechanical properties of the material and affecting its use. Contents of the invention [0003] The object of the present invention is to provide a kind of hydrolysis-resistant polybutylene terephthalate. [0004] The technical scheme adopted by ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L51/04C08K13/06C08K7/14C08K5/20
Inventor 不公告发明人
Owner QINGDAO WANLI TECH
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