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Block type high-temperature-resistant copolyamide and preparation method thereof

A technology of copolyamide and block copolymer, which is applied in the field of block-type high-temperature-resistant copolyamide and its preparation, can solve the problems that the degree of reaction cannot be further improved, it is not suitable for industrial production, and the scope of application is limited, so as to facilitate mass production and broaden the scope of application. The effect of convenient application and aggregation operation

Active Publication Date: 2012-09-05
JUNMA TIRE CORD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Block polyamide mainly adjusts the performance of the product by adjusting the composition and length of each chain segment, but its biggest defect is that when a certain amount of block copolymer is produced, the degree of reaction cannot be improved.
[0003] Chinese patent CN200780019993.5 prepared a polyamide block copolymer by sequential monomer addition, but its melting point is relatively low; Chinese patent CN200510012842[1].X introduced a copolyamide and its preparation method, but its preparation The prepolymer is limited to polyamide with linear structure, which limits its application scope; Chinese patent CN200710173610.1 introduces semi-aromatic and aliphatic polyamide block copolymer and its synthesis process, but uses organic solvent as solvent , the cost is higher, and it is not suitable for industrialized production; although the preparation method of the present invention partly draws on their method, it involves the method of block copolymerization of wholly aromatic polyamide and aliphatic polyamide that they do not involve, and has not yet There are reports of this

Method used

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  • Block type high-temperature-resistant copolyamide and preparation method thereof
  • Block type high-temperature-resistant copolyamide and preparation method thereof
  • Block type high-temperature-resistant copolyamide and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Raw materials: p-phenylenediamine, terephthalic acid, caprolactam, deionized water

[0020] a. Preparation of poly-p-phenylene terephthalamide prepolymer:

[0021] Add p-phenylenediamine and terephthalic acid with a molar percentage of 1:1, and deionized water of 0.5 to 5 times the total mass of the raw materials together into the high-pressure polymerization kettle, pass nitrogen to remove the air, and heat to 200~250℃, keep the pressure at 1~2MPa, keep it for 1~4h, vacuumize for 1~2h, and discharge under nitrogen protection to obtain poly-p-phenylene terephthalamide prepolymer;

[0022] b. Preparation of PA6 prepolymer:

[0023] Add caprolactam and 0.5 to 5 times the mass of deionized water together into the high-pressure polymerization kettle, blow nitrogen to remove the air, heat to 150-200°C, keep the pressure at 1-2MPa, keep it for 1-4h, and vacuum for 1 ~2h, discharge under nitrogen protection to obtain PA6 prepolymer;

[0024] Add 800g (mass ratio 5:5) and 16...

Embodiment 2

[0027] Prepare two kinds of prepolymers according to the step of implementation example 1, by the removal of 1200g poly-p-phenylene terephthalamide prepolymer and 800gPA6 prepolymer (mass ratio 6: 4) and 0.5 times of prepolymer gross mass Add ionized water into the autoclave, seal it, heat it to 220°C, keep the pressure at 1.4MPa, then continue to heat up to 280°C, control the pressure at 2.5MPa, keep it for 4h, vacuumize it for 1h, discharge under nitrogen protection, and get the final product , denoted as P-2.

Embodiment 3

[0029] Prepare two kinds of prepolymers according to the step of embodiment example 1, by the removal of 2100g poly-p-phenylene terephthalamide prepolymer and 900gPA6 prepolymer (mass ratio 7: 3) and 0.5 times of prepolymer gross mass Add ionized water into the autoclave, seal it, heat it to 220°C, keep the pressure at 1.4MPa, then continue to heat up to 280°C, control the pressure at 2.5MPa, keep it for 4h, vacuumize it for 1h, discharge under nitrogen protection, and get the final product , recorded as P-3.

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Abstract

The invention relates to a block type high-temperature-resistant copolyamide and a preparation method thereof. An aromatic polyamide prepolymer has the structure shown in the specification, wherein A is -(CH2)x1-, B is -(CH2)x2-, x1 and x2 can be 0, 1, 2, 3 and 4, and x1+x2 is less than or equal to 4. An aliphatic prepolymer has the structure shown in the specification, wherein D is -(CH2)x3-, and x3 can be 2, 4, 6, 8, 9, 10 or 11. The block copolyamide has the structure shown in the specification, wherein m1, m2 and m3 can be 0-80, and y1, y2 and y3 can be any integer greater than 1. The substance containing benzene ring has a para-position structure or meta-position structure, and the preparation method of the substance comprises preparation of the prepolymers and the block copolymer. The prepared block type high-temperature-resistant polyamide and the preparation method thereof enable the compatibility of polyamide to be good and products to be diversified, improve the performance,and are more practical.

Description

technical field [0001] The invention relates to a copolyamide and a preparation method thereof, in particular to a block type high temperature resistant copolyamide and a preparation method thereof. Background technique [0002] Amide, commonly known as nylon, is a class with excellent physical and mechanical properties. With the rapid development of modern industry, especially in the development of the automobile industry and the electrical and electronic industry, many new requirements have been put forward for the performance of polyamide. Block polyamide mainly adjusts the performance of the product by adjusting the composition and length of each chain segment, but its biggest defect is that after a certain amount of block copolymer is formed, the degree of reaction cannot be increased. [0003] Chinese patent CN200780019993.5 prepared a polyamide block copolymer by sequential monomer addition, but its melting point is relatively low; Chinese patent CN200510012842[1].X ...

Claims

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Application Information

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IPC IPC(8): C08G81/00C08G69/32C08G69/14
Inventor 韩冰李红尽方乃照
Owner JUNMA TIRE CORD
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