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A polyamide molding composition

A polyamide molding and composition technology, applied in the field of polyamide molding compositions, can solve the problems of huge difference in pH value and difference in polymer properties, etc.

Active Publication Date: 2018-03-30
ZHUHAI WANTONG SPECIAL ENG PLASTICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Even for polyamides with the same composition and monomer ratio, due to the combined effect of the above factors, their pH values ​​may vary greatly, resulting in differences in polymer properties.

Method used

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  • A polyamide molding composition
  • A polyamide molding composition

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Experimental program
Comparison scheme
Effect test

Embodiment 1-8 and comparative example 1-5

[0122] Examples 1-8 and Comparative Examples 1-5: Preparation of Polyamide Molding Compositions

[0123] Mix the polyamide resin, flame retardant and other additives uniformly in the high mixer according to the formula in Table 2-3, then feed them into the twin-screw extruder through the main feeding port, and feed the reinforcing filler through the side feeding scale , extruded, water cooled, granulated and dried to obtain the polyamide molding composition.

[0124] In table 2, the formulations in the following table are parts by weight

[0125]

[0126] In table 3, the formulas in the following table are parts by weight

[0127]

[0128] It can be seen from Table 2-3 that due to the use of a polyamide resin with a specific molar content of bio-based carbon and a polyamide resin with a pH value of less than 7 in phenol, the melt weight loss rate of the polyamide molding composition prepared therefrom τ Lower, which means that it releases less gas, and t...

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Abstract

The invention discloses polyamide molding composition. The composition comprises components as follows: a, 30wt%-99.9wt% of polyamide resin with the pH value smaller than 7 in phenol; b, 0-70wt% of reinforcing filler; c, 0-70wt% of an additive and / or other polymers, wherein the sum of weight percentages of the three components a, b and c is 100wt%; in the polyamide resin with the pH value smaller than 7 in the phenol, the molar content of bio-based carbon is higher than 40mol% on the basis of molar content of all carbon atoms in the polyamide resin. The melting weight loss ratio phi of the polyamide molding composition prepared from the polyamide resin with the bio-based carbon with the specific molar content and the pH value smaller than 7 in the phenol is lower, that is, the composition releases less gas, and surfaces of products are good when the composition is applied to injection molding. Meanwhile, the products are higher in Ganz whiteness W and better in color.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a polyamide molding composition. Background technique [0002] Polyamide is widely used for its good comprehensive properties, including mechanical properties, heat resistance, wear resistance, chemical resistance and self-lubricating properties, low coefficient of friction, and certain flame retardancy. Glass fiber and other fillers are filled to enhance and modify, improve performance and expand application range, etc. In recent years, semi-aromatic polyamides have been focused on development due to their better heat resistance and mechanical properties. [0003] However, the existing polyamide resins mainly use raw materials from petroleum cracking products in the synthesis process. Petroleum is non-renewable, and the synthesis of these raw materials requires a complex chemical process, which consumes a lot of energy and produces many by-products that cause environmental pol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L77/06C08L77/00C08L23/20C08L23/06C08K13/04C08K7/14C08K5/5313C08K5/06C08K3/38
CPCC08L77/00C08L77/06C08L2201/02C08L2205/03C08L23/06C08K7/14C08L23/20C08K13/04C08K5/5313C08K5/06C08K2003/387
Inventor 张传辉谢湘王鹏蔡彤旻曾祥斌曹民夏世勇叶南飚陈大华杨纯尔
Owner ZHUHAI WANTONG SPECIAL ENG PLASTICS CO LTD