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Polyamide resin and polyamide composition composed of polyamide resin

A technology of polyamide composition and polyamide resin, which is applied in the field of polyamide composition, can solve the problems of high water absorption, insufficient copolymer toughness, and obstacles to the expansion of application fields, and achieve low saturated water absorption, strong heat resistance, The effect of high heat resistance

Inactive Publication Date: 2014-07-23
KINGFA SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, similar to PA66, due to the high concentration of amide bonds in PA6T, its water absorption rate is high, which leads to a series of restrictions on use.
At the same time, PA6T-related copolymers also have the problem of insufficient toughness, which needs to be improved urgently.
In addition, the problem of floating fibers on the surface of injection molded products also seriously affects the surface morphology of products, which becomes an obstacle to the expansion of application fields

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1~11 and comparative example 1~8

[0062] In the autoclave equipped with magnetic coupling stirring, condenser, gas phase port, feed port, pressure explosion-proof port, add the reaction raw materials according to the ratio in the table; add benzoic acid, sodium hypophosphite and deionized water; the amount of benzoic acid It is 2.5% of the total amount of diamine, diacid, lactam and amino acid, the weight of sodium hypophosphite is 0.1% of the weight of other feeding materials except deionized water, and the weight of deionized water is 30% of the total weight of feeding; Enter high-purity nitrogen as a protective gas, and heat up to 220°C within 2 hours under stirring. o C, the reaction mixture was heated at 220 o C was stirred for 1 hour, and then the temperature of the reactant was raised to 230 o C; response at 230 o The constant temperature of C and the constant pressure of 2.2MPa continued for 2 hours, and the pressure was kept constant by removing the formed water. After the reaction was completed, th...

Embodiment 12-17 and comparative example 9~13

[0069] Mix the polyamide resin, flame retardant and other additives uniformly in the high mixer according to the formula in Table 2, then feed them into the twin-screw extruder through the main feeding port, feed the reinforcing filler through the side feeding scale, and extrude out, cooled with water, granulated and dried to obtain the polyamide composition. Among them, the extrusion temperature is 330 o c.

[0070] In table 2, the formulations in the following table are parts by weight

[0071] Example 12 Example 13 Example 14 Example 15 Example 16 Example 17 Comparative example 9 Comparative example 10 Comparative example 11 Comparative example 12 Comparative example 13 polyamide resin Example 2 Example 2 Example 4 Example 7 Example 2 Example 2 Comparative example 1 Comparative example 1 Comparative example 5 Comparative example 5 Comparative example 1 resin content 70 50 70 50 30 99.9 70 50 70 50 ...

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PUM

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Abstract

The invention discloses a polyamide resin. The polyamide resin is composed of following repeat unit ingredients: 80 to 99mol% of an ingredient A, which is 10T unit composed of decamethylene diamine and terephthalic acid; and 1 to 20mol% of an ingredient B, which is 1010 unit composed of decamethylene diamine and decanedioic acid; wherein decanedioic acid is substituted by isophthalic acid or other aliphatic dicarboxylic acids with 2 to 14 carbon atoms. The invention also discloses a polyamide composition containing the polyamide resin. The polyamide composition comprises, by weight, 30 to 99.9% of the polyamide resin, 0 to 60% of a reinforcing filler, 0 to 50% of a flame retardant, and 0.1 to 10% of other auxiliary agents. Saturated water absorptivity of the polyamide resin and the polyamide composition is less than 0.8wt%, so that the polyamide resin and the polyamide composition can be used for components, such as engine oil tubes, with relatively high requirements on saturated water absorptivity; melting point is higher than 260 DEG C, and heat resistance is high, so that the polyamide resin and the polyamide composition can be used for environments with a reflow soldering temperature more than 260 DEG C, and the like; elongation at break ranges from 14 to 45%; notch impact strength ranges from 6.9 to 12.0kJ / m<2> (23 DEG C); toughness is high, so that the polyamide resin and the polyamide composition can be used for components, such as engine oil tubes, with relatively high requirements on toughness.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a polyamide resin and a polyamide composition composed of it. 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 with glass fiber and other fillers to enhance modification, 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] Semi-aromatic high-temperature resistant polyamide PA6T copolymers have long been known for their high fluidity and high temperature resistance. However, similar to PA66, due to the high concentration of amide bonds in PA6T, its water absorption rate is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G69/26C08L77/06C08L23/20C08K13/06C08K9/06C08K7/14C08K5/5313C08K3/38
CPCC08L77/06C08G69/265C08K5/51C08K7/14C08L25/18
Inventor 张传辉蔡彤旻吉继亮曾祥斌曹民夏世勇叶南飚陈大华
Owner KINGFA SCI & TECH CO LTD
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