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Semi-aromatic copolyamide resin and copolyamide molded composition consisting of same

A technology of polyamide molding and copolyamide, which is applied in the field of engineering plastics and can solve the problems of semi-aromatic polyamides being rare in the public domain

Active Publication Date: 2016-11-16
ZHUHAI WANTONG SPECIAL ENG PLASTICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The industry has a long history of research on semi-aromatic polyamides related to long carbon chain diamines, but most of them are based on nonanediamine, decanediamine and dodecanediamine. For semi-aromatic polyamides based on undecanediamine public is rare

Method used

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  • Semi-aromatic copolyamide resin and copolyamide molded composition consisting of same
  • Semi-aromatic copolyamide resin and copolyamide molded composition consisting of same
  • Semi-aromatic copolyamide resin and copolyamide molded composition consisting of same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-4 and comparative example 1-7

[0130] Examples 1-4 and Comparative Examples 1-7: Preparation of polyamide molding compositions

[0131] According to the formula in Table 2, the semi-aromatic copolyamide resin, additives and / or other polymers are mixed uniformly in the high-speed mixer, and then fed into the twin-screw extruder through the main feeding port, and the reinforcing filler is fed through the side of the side feeding scale. Feed; extrusion, water cooling, granulation and drying to obtain a polyamide molding composition. Here, the extrusion temperature was set to be 20°C or higher than the melting point.

[0132] Table 2 Each component in the following table is a weight percentage (%)

[0133]

[0134] As can be seen from Table 2, the polyamide molding composition prepared from the semi-aromatic copolyamide resin prepared in the present application has significantly improved color properties, low water absorption and good dimensional stability.

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Abstract

The invention discloses semi-aromatic copolyamide resin. The semi-aromatic copolyamide resin comprises a repetitive unit derived from the following components: (A) diamine, including 30mol%-100mol% of 1,11-undecane diamine and 0-70mol% of other C4-C36 diamine based on the amount of diamine; and (B) diacid, including 30mol%-100mol% of terephthalic acid and 0-70mol% of other C6-C36 diacid based on the amount of diacid, wherein the semi-aromatic copolyamide resin contains three or more monomers, and the monomers do not contain lactam or amino acid monomers. According to the semi-aromatic copolyamide resin, C11 diamine is taken as a copolymerization component, and the proportion of diamine to diacid is controlled to met specific requirements, so that the semi-aromatic copolyamide resin with improved color performance, low water absorption rate and good dimensional stability, and a copolyamide molded composition consisting of the semi-aromatic copolyamide resin also has improved color performance, low water absorption rate and good dimensional stability.

Description

technical field [0001] The invention relates to the technical field of engineering plastics, in particular to a semi-aromatic copolyamide resin and a polyamide molding composition composed thereof. Background technique [0002] Polyamide resins are widely used because of their good comprehensive properties, including mechanical properties, heat resistance, wear resistance, chemical resistance and self-lubrication, low friction coefficient, and certain flame retardancy. Filled with glass fiber and other fillers to enhance and modify, improve performance and expand the scope of applications. In recent years, semi-aromatic polyamides have been mainly developed due to their better heat resistance and mechanical properties. [0003] However, PA6T semi-aromatic polyamides generally have higher water absorption and poorer color. Higher water absorption can easily lead to blistering in the reflow soldering process, while poor color can prevent the production of light-colored parts...

Claims

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Application Information

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IPC IPC(8): C08G69/26C08L77/06C08L23/20C08K7/14C08K5/5313C08K3/34
CPCC08G69/265C08K2201/004C08K2201/016C08L77/06C08L23/20C08K7/14C08K3/34C08K5/5313
Inventor 张传辉曹民姜苏俊曾祥斌刘奇祥孙华伟高红军
Owner ZHUHAI WANTONG SPECIAL ENG PLASTICS CO LTD
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