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High-fluidity PA10T polyamide resin and polyamide composition comprising same

A technology of polyamide composition and polyamide resin, which is applied in the field of polymer materials, can solve the problems of resin degradation and limited application, and achieve the effect of high fluidity

Inactive Publication Date: 2013-10-02
KINGFA SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned operation methods inevitably bring about the problem of resin degradation, which limits the application of PA10T polyamide resin in many fields

Method used

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  • High-fluidity PA10T polyamide resin and polyamide composition comprising same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment A1~A4

[0042] Embodiment A1~A4: Preparation of PA10T polyamide resin A

[0043] 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 Table 1, then add benzoic acid, sodium hypophosphite and deionized water; sodium hypophosphite weight 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 nitrogen as a protective gas, and heat up to 220 within 2 hours under stirring. o C, the reaction mixture was heated at 220 oC 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, the prepolymer was discharge...

Embodiment B1~B4

[0046] Embodiment B1~B4: Preparation of PA10T polyamide resin B

[0047] 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 Table 2, then add benzoic acid, sodium hypophosphite and deionized water; sodium hypophosphite weight 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 nitrogen as a protective gas, and heat up to 220 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, the prepolymer was discha...

Embodiment C1~C8 and comparative example 1~3

[0050] Embodiment C1~C8 and comparative example 1~3: Preparation of polyamide composition

[0051] Mix PA10T polyamide resin A, B, titanium dioxide, talcum powder, and other additives uniformly in the high-mixer according to the formula in Table 3-4, and then feed them into the twin-screw extruder through the main feeding port, and the reinforcing filler passes through Side feeding by side feeding scale, extrusion, water cooling, granulation and drying to obtain the polyamide composition; wherein, the extrusion temperature is 330 o c.

[0052] table 3

[0053]

[0054] Table 4

[0055] Comparative example 1 Comparative example 2 Comparative example 3 PA10T polyamide A / wt% 0 40 0 PA10T polyamide B / wt% 60 50 0 Polyamide 6T / 66 / wt% 0 0 60 Titanium dioxide / wt% 30 9 30 Talc powder / wt% 9.8 0.8 9.8 Antioxidant 1098 / wt% 0.1 0.1 0.1 Licowax OP / wt% 0.1 0.1 0.1 Apparent viscosity / Pa·s 180 20 105 S...

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Abstract

The invention discloses a high-fluidity PA10T polyamide resin A. The relative viscosity of the PA10T polyamide resin A is 1.2-1.8 in 98% concentrated sulfuric acid at the temperature of 25 DEG C; the amino end group value of the PA10T polyamide resin A is 20-60mol / t and the carboxyl end group value is 70-130mol / t; and benzoic acid accounts for 2-20mol% of repetitive units in the PA10T polyamide resin A. A polyamide composition comprises the following components in percentage by weight: 5-29.8wt% of the PA10T polyamide resin A, 50-94wt% of PA10T polyamide resin B, 0.8-40wt% of mineral filler and 0.2-1wt% of other auxiliaries. The PA10T polyamide resin A disclosed by the invention has the advantages that the apparent viscosity is low and the fluidity is high under the melting condition; and when a certain proportion of the PA10T polyamide resin A is added in semi-aromatic polyamide, the obtained polyamide composition has high fluidity and basically-equal mechanical property and can be applied to occasions with high dimensional requirement on injection molding products.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a high-fluidity PA10T 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 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] PA10T polyamide resin, which is polymerized from decanedidiamine and terephthalic acid, has low water absorption and high melting point, and is currently developing rapidly. However, compared to PA6T polyamide resin, the melt viscosity of PA10T p...

Claims

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Application Information

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IPC IPC(8): C08G69/26C08L77/06C08K13/02C08K3/22C08K3/34
CPCC08G69/26C08K3/22C08K3/34C08K2003/2241C08L77/06C08L2205/025
Inventor 张传辉袁志敏蔡彤旻吉继亮曾祥斌曹民夏世勇叶南飚陈大华殷年伟
Owner KINGFA SCI & TECH CO LTD
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