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Semi-aromatic polyamide and polyamide molding composition composed of same

A semi-aromatic, polyamide technology, applied in the field of new polymer materials, can solve the problems of improving color, polyamide can not get good color polyamide products, etc.

Active Publication Date: 2020-02-14
KINGFA SCI & TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this can only improve the color rendering by improving the Ganz whiteness of the resin itself, not from the combination degree of the polyamide resin matrix and the pigment to improve the color performance
At the same time, it is impossible to obtain polyamide products with good color only by improving the whiteness and yellowing resistance of polyamide.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0049] The preparation method of embodiment and comparative example semi-aromatic polyamide:

[0050] In the autoclave equipped with magnetic coupling stirring, condensing tube, gas phase port, feeding port, and pressure explosion-proof port, add the reaction raw materials according to the ratio of Table 1, then add sodium hypophosphite, antioxidant and deionized water, and the weight of sodium hypophosphite In order to remove 0.1% of the weight of other feeds except deionized water, the weight of deionized water is 30% of the total weight of feed; vacuumize and fill with high-purity argon as a protective gas to start the reaction. Heat the reaction mixture to 190-210°C and stir for 3-5 hours, then open the valve to slowly release the pressure and drain water while keeping the temperature and pressure constant. Drain until the drainage volume reaches 70% of the input deionized water volume. At this time, the temperature starts to rise, and the temperature is raised to 220~240...

Embodiment 5

[0067] The proportion and preparation method of each component of the molding composition composed of polyamide resin in Example 5 and Comparative Example 1 / 4 / 6 / 7 are as follows: 100 parts of polyamide resin; 30 parts of talc; 15 parts of nitrile rubber.

[0068] The preparation method of polyamide molding composition: mix polyamide resin, talc, and nitrile rubber in a high-speed mixer according to the above formula, and then add them to the twin-screw extruder through the main feeding port, and the reinforcing filler passes through the side The polyamide molding composition was obtained by side-feeding from a feeding scale, extrusion, water cooling, granulation and drying.

[0069] Table 3: Distribution ratio of each component of polyamide molding composition

[0070] Polyamide Resin Sources Example 5 Comparative example 1 Comparative example 4 Comparative example 6 Comparative example 7 Relative tinting strength, % 128 104 105 107 99

[007...

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PUM

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Abstract

The invention discloses semi-aromatic polyamide which comprises the following repetitive units based on the molar content of all repetitive units of a chain segment: (a) 53 mol / % to 71 mol / % of a 10Tunit derived from 1,10-decamethylene diamine and terephthalic acid; and (b) 29 mol / % to 47 mol / % of a 10X unit derived from at least one of 1,10-decanediamine and isophthalic acid, 1,4-cyclohexanedicarboxylic acid, adipic acid, octanedioic acid, 1,10-decanedioic acid, 1,12-dodecanedioic acid, and pentadecanedioic acid; in the semi-aromatic polyamide, the molar content of bio-based carbon is 39 mol%-100 mol%; in the semi-aromatic polyamide, the amino content is 30-100 mol / ton, and the carboxyl content is 30-200 mol / ton. The semi-aromatic polyamide with excellent colorability is obtained by controlling the content of bio-based carbon, the content of amino and the content of carboxyl and matching the content of all the repetitive units with monomers.

Description

technical field [0001] The invention relates to the technical field of new polymer materials, in particular to a semi-aromatic polyamide and its molding composition. Background technique [0002] Polyamide is widely used because of its good comprehensive properties, including mechanical properties, heat resistance, wear resistance, chemical resistance and self-lubrication, low coefficient of friction, certain flame retardancy, and easy processing. It is suitable for filling and modifying with glass fiber and other fillers to improve performance and expand application range. In recent years, semi-aromatic polyamides have been focused on development due to their better heat resistance and mechanical properties. [0003] However, the raw materials for the synthesis of existing polyamide resins are mainly derived from petroleum cracking products. This petroleum-based polyamide contains some chemically unstable substances. During the production process, it is prone to chemical ...

Claims

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Application Information

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IPC IPC(8): C08G69/26C08G69/28C08L77/06C08L9/02C08K3/34
CPCC08G69/265C08G69/28C08L77/06C08L9/02C08K3/34
Inventor 周竹欣张传辉黄险波
Owner KINGFA SCI & TECH CO LTD
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