Scratch-resistant polybutylene terephthalate composition and preparation method thereof

A technology of polybutylene terephthalate and composition, which is applied in the field of scratch-resistant polybutylene terephthalate composition and its preparation, and can solve the problems of unsuitable preparation of precision parts, poor dimensional stability, etc. problems, to achieve the effect of no glass fiber exposure, excellent scratch resistance, and no warping deformation

Inactive Publication Date: 2012-05-23
HEFEI GENIUS NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Polybutylene terephthalate is a new type of engineering plastic developed and industrialized by Celanese Company of the United States in the 1970s. It is one of the five commonly used engineering plastics and has good mechanical properties, electrical properties and good durability. Grinding performance, rapid crystallization leads to poor dimensional stability, not suitable for the preparation of precision parts

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] First, SiC whiskers with 8 parts by weight, nucleating agent 1 with 1 part by weight, lubricant 1 with 0.05 parts by weight and tetrakis[methyl-β-(3,5-di-tert-butyl) with 0.5 parts by weight Base-4-hydroxyphenyl)propionate]pentaerythritol ester and tris(2,4-di-tert-butylphenyl)phosphite in a 1:1 mixture. Place in a temperature-controlled high-speed blender. Stir at high speed at 90°C for 2 minutes, then add 65 parts by weight of polybutylene terephthalate pellets and 8 parts by weight of elastomer 1 at room temperature and stir for 2 minutes, and finally put the mixed components into the extruder In the process of extrusion, 18 parts by weight of glass fiber is added from the glass fiber port, mixed at 255-270 ° C to obtain a polymer, and the obtained polymer is extruded in strips, and then cut into segments to form 2- 5mm particles. The obtained pellets were injection molded into corresponding specimens according to the ISO test standard, and then placed in an enviro...

Embodiment 2

[0059] Firstly, magnesium salt whiskers with 5 parts by weight and nucleating agent 1 with 2 parts by weight, lubricant 2 with 2 parts by weight and CAS No. 38613-77-3 with 0.4 parts by weight are organic phosphites The heat stabilizer is placed in a temperature-controllable high-speed mixer, and stirred at a high speed at 120°C for 10 minutes, and then 73 parts by weight of polybutylene terephthalate pellets and 2 parts by weight of elastomer are added at room temperature 2. Stir for 6 minutes, and finally put the mixed components into the extruder. During the extrusion process, add 16 parts by weight of glass fiber from the glass fiber port, enough to keep the polybutylene terephthalate resin in a molten state. Mix at a temperature of 230-280° C. to obtain a polymer, extrude the obtained polymer in a strip, and then cut it into segments to form 2-5 mm particles. The obtained pellets were injection molded into corresponding specimens according to the ISO test standard, and th...

Embodiment 3

[0061] First, the potassium titanate whiskers of 20 parts by weight, the nucleating agent 2 of 0.01 parts by weight, the lubricant 2 of 1 part by weight and the tetrakis[methyl-β-(3,5-di-tert-butyl) of 0.4 parts by weight CAS number 38613-77- 3 is an organic phosphite heat stabilizer. Place in a temperature-controllable high-speed mixer, stir at 100°C for 5 minutes at high speed, then add 40 parts by weight of polybutylene terephthalate pellets and 10 parts by weight of elastomer 1 at room temperature and stir for 3 minutes, and finally Component after mixing is put into extruder, adds the glass fiber of weight portion 20 from glass fiber port during extruding, under the temperature (240 ~ 290° C.) to obtain a polymer, which is extruded in a strip and then cut into segments to form 2 ~ 5 mm pellets. The obtained pellets were injection molded into corresponding specimens according to the ISO test standard, and then placed in an environment of 23±2° C. and 50±5% relative humid...

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Abstract

The invention belongs to the field of high molecular materials and forming and processing thereof and relates to a scratch-resistant polybutylene terephthalate composition and a preparation method thereof. The composition comprises the following components in parts by weight: 40-84 parts of polybutylene terephthalate, 10-45 parts of glass fiber, 5-40 parts of crystal whiskers, 2-10 parts of elastomer, 0.01-2 parts of nucleating agent, 0.01-2 parts of lubricant and 0.01-2 parts of other assistants. Compared with the prior art, the composition provided by the invention has the advantages of smooth product surface, no exposed and warped glass fiber and excellent scratch resistance after being formed.

Description

technical field [0001] The invention belongs to the field of polymer materials and their molding processing, and relates to a scratch-resistant polybutylene terephthalate composition and a preparation method thereof. Background technique [0002] Plastic surfaces can be visibly damaged in several ways, including scratches from sharp objects, wear from abrasive friction, surface damage that alters surface properties or gloss, or light scratches from dull objects. Scratching is one of the damage methods on the surface of materials. It is the material yielding under the action of pressing force and sliding force or lateral force or lateral force, resulting in ductile or brittle damage and scratches. Its types and mechanisms are quite complicated. , there are many influencing factors. The molecular structure of the polymer, fillers, additives, lubricants and impact modifiers all affect the scratch resistance of the polymer. [0003] Scratch-resistant parts must first meet the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08K13/04C08K7/14C08K7/10C08K7/04C08K7/08C08K3/36
Inventor 吕励耘付常俊杨桂生
Owner HEFEI GENIUS NEW MATERIALS
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