Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of high flow random copolymerized semi-aromatic nylon and its preparation method

A semi-aromatic nylon technology, applied in the field of semi-aromatic nylon, can solve the problems of affecting resin crystallization, high melt viscosity and poor fluidity of semi-aromatic nylon, and achieve long-term performance maintenance, easy industrial production, and improved melt fluidity. Effect

Active Publication Date: 2021-12-21
珠海派锐尔新材料有限公司
View PDF12 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the melt viscosity is too high and the fluidity is too poor, the modified material will be unevenly dispersed in the semi-aromatic nylon matrix, or it will be difficult to increase the amount of modified material added
[0003] Aiming at the problem of high melt viscosity of semi-aromatic nylon, Chinese patent CN102276980 improves the overall fluidity of semi-aromatic nylon resin by adding liquid crystal polymer (LCP) with high fluidity, which may cause the phase between semi-aromatic nylon and LCP. Capacitance problems, such as the generation of material flowers, the increase of fluidity and the maintenance of other properties are difficult to achieve the desired effect
CN103342811 improves the fluidity of the same product by adding semi-aromatic nylon oligomers, which can reduce the overall viscosity of the system to a certain extent without much change in performance, and there will be no compatibility between the two substances. problem, but the addition of low molecular weight substances will affect the long-term performance of the material
CN104497305 improves the fluidity of the entire resin by adding polyamines during polymerization, so that the polyamines enter the molecular chain, but branching will affect the crystallization of the resin and reduce the strength

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of high flow random copolymerized semi-aromatic nylon and its preparation method
  • A kind of high flow random copolymerized semi-aromatic nylon and its preparation method
  • A kind of high flow random copolymerized semi-aromatic nylon and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0105] Add the following materials into the autoclave: 8.3kg terephthalic acid, 7.8kg dodecanediamine, 6.9kg bisphenol S-type diphenyl ether diamine, 25kg deionized water, 61g end-capping agent benzoic acid, catalyst Sodium hypophosphite 60g, seal the reactor, replace the air in the kettle with nitrogen for 5 times, fill the kettle with 0.1MPa after the ventilation is completed, control the heating rate to raise the temperature to 180°C in about 2h, and the pressure is stable at 1.1MPa, the reaction 2h, then raise the temperature to 230°C within 1h, and stabilize the pressure at 2.8MPa. After reacting for 2h, release the pressure to normal pressure within 1.5h, then continue to react at normal pressure for 2h before discharging, and the product is dried, smash.

[0106] Add 15kg of dried polymerization reaction product into the drum, seal the drum, vacuum the drum to -0.099MPa, open the drum, set the temperature at 240°C, and discharge the material after 18 hours of reaction t...

Embodiment 2

[0108] Add the following materials into the autoclave: 8.3kg of terephthalic acid, 7.1kg of decyl diamine, 4.8kg of bisphenol A diphenyl ether diamine, 21kg of deionized water, 61g of end-capping agent benzoic acid, catalyst Sodium phosphate 85g, seal the reaction kettle, replace the air in the kettle with nitrogen for 5 times, fill the kettle with 0.1MPa after the ventilation is completed, control the heating rate to rise to 160°C in about 1.5h, keep the pressure stable at 0.6MPa, and react for 2h , then raise the temperature to 240°C within 1 hour, stabilize the pressure at 3.3 MPa, and after 2 hours of reaction, release the pressure to normal pressure within 2 hours, then continue the reaction under normal pressure for 2 hours, then discharge the product, and then dry and pulverize the product.

[0109] Add 15kg of dried polymerization reaction product into the drum, close the drum, vacuum the drum to -0.099MPa, open the drum, set the temperature at 250°C, and discharge the ...

Embodiment 3

[0111] Add the following materials into the autoclave: 8.3kg terephthalic acid, 6.8kg nonanediamine, 2.9kg biphenyl diphenol type diphenyl ether diamine, 36kg deionized water, 30g end-capping agent benzoic acid, catalyst times Sodium phosphite 75g, seal the reaction kettle, replace the air in the kettle with nitrogen for 5 times, fill the kettle with 0.05MPa after the ventilation is completed, control the heating rate to rise to 160°C in about 1.5h, and the pressure is stable at 0.6MPa, the reaction 2h, then raise the temperature to 240°C within 1.5h, and stabilize the pressure to 3.3MPa. After reacting for 2h, release the pressure to normal pressure within 2h, then continue to react under normal pressure for 2h, then discharge the material, and dry the product. smash.

[0112] Add 15kg of dried polymerization reaction product into the drum, close the drum, vacuum the drum to -0.099MPa, open the drum, set the temperature at 255°C, and discharge the material after 16 hours of r...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a semi-aromatic nylon, which comprises the following components in terms of mole percentage: 34.5%-50% of dibasic acid; 36.5%-52.5% of diamine; aromatic diphenyl ether dicarboxylic acid or aromatic diphenyl ether Diamine 2.5%-15.5%; said dibasic acid and dibasic amine do not contain benzene ring at the same time, nor are aliphatic dibasic acid and aliphatic dibasic amine at the same time. The invention introduces aromatic diphenyl ether dicarboxylic acid or aromatic diphenyl ether diamine as a modifier, which improves fluidity and maintains good mechanical properties.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a semi-aromatic nylon. Background technique [0002] Nylon is a polymer formed by polycondensation reaction of dibasic acid and diamine plus end-capping agent and other additives. It has very excellent properties, such as excellent mechanical properties, heat resistance, solvent resistance, self-lubrication Wait. Semi-aromatic nylon refers to a type of nylon that introduces benzene rings into the nylon molecular chain, so that it is formed by polycondensation of aliphatic diamines and aromatic dibasic acids or aromatic diamines and aliphatic dibasic acids. nylon polymer. Because benzene rings are added to the molecular chain, it has higher heat resistance temperature, better mechanical properties, lower water absorption, and lower dimensional stability than ordinary nylon. Although semi-aromatic nylon has excellent performance, due to the effect of the benzene ring in the mole...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C08G69/42C08G69/26C08G69/28
CPCC08G69/42C08G69/265C08G69/28
Inventor 王贤文胡三友谭麟饶先花黄文刚龚维
Owner 珠海派锐尔新材料有限公司