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

Highly heat-resistant alternating copolyamide resin and preparation method thereof

A technology of copolyamide and high heat resistance, which is applied in the manufacture of intermediate products of copolyamide, copolyamide, high heat resistance alternating copolyamide resin PAXY/ZY and its preparation, and the field of YXY diester, which can solve the problems that cannot be achieved by injection molding , high melting point, application limitations and other issues, to achieve the effect of easy processing, good toughness and good dimensional stability

Active Publication Date: 2019-01-08
DONGHUA UNIV
View PDF3 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Homopolymerized PA6T has excellent heat resistance and dimensional stability, but its application is limited due to its high melting point, which prevents it from being injection molded

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A kind of preparation method of YXY diester:

[0028] 203g of dibutyl oxalate and 1000mL of toluene were added to a 2L three-necked flask, and 19g of 1,3-propylenediamine was added dropwise with a constant pressure funnel under mechanical stirring and nitrogen flow, followed by reflux for three hours; the resulting mixture was precipitated and filtered And after washing with acetone, white powder is obtained; subsequently, it is recrystallized with butyl acetate, and is washed twice with acetone, and after drying, the pure 232 diester solid of butyl end-capping is obtained; the output of 232 diester after recrystallization is 37g.

Embodiment 2

[0030] A kind of preparation method of YXY diester:

[0031] 175g of diethyl oxalate and 1000mL of toluene were added to a 2L three-necked flask, and 26g of 1,4-butylene diamine was added dropwise with a constant pressure funnel under mechanical stirring and nitrogen flow, followed by reflux for three hours; the resulting mixture was precipitated and filtered And after washing with acetone, white powder is obtained; subsequently, it is recrystallized with butyl acetate, and is washed twice with acetone, and after drying, the pure 242 diester solid of ethyl ester end-capping is obtained; the output of 242 diester after recrystallization is 41g.

Embodiment 3

[0033] A kind of preparation method of YXY diester:

[0034] 242g of dibutyl oxalate and 1000mL of toluene were added to a 2L three-necked flask, and 1,6-hexamethylenediamine 35g was added dropwise with a constant pressure funnel under mechanical stirring and nitrogen flow, followed by reflux for three hours; the resulting mixture was precipitated, After filtering and washing with acetone, a white powder was obtained; subsequently, it was recrystallized with butyl acetate, washed twice with acetone, and dried to obtain a pure 262 diester solid terminated by butyl ester; the yield of 262 diester after recrystallization It is 49g.

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

PropertyMeasurementUnit
Melting pointaaaaaaaaaa
Melting pointaaaaaaaaaa
Melting pointaaaaaaaaaa
Login to View More

Abstract

The invention discloses a highly heat-resistant alternating copolyamide resin and a preparation method thereof. The preparation method comprises the following steps: reacting diamine X with dicarboxylic ester Y to prepare YXY diester; and polycondensing the YXY diester with diamine Z to obtain alternating copolyamide resin PAXY / ZY. The highly heat-resistant alternating copolyamide resin has a melting point of 250-400 DEG C, which is 20-150 DEG C higher than the melting point of a random copolymer with the same composition. The highly heat-resistant alternating copolyamide resin provided by theinvention has excellent characteristics of good dimensional stability, high strength, good toughness, easy processing, high temperature resistance and the like, and has a high application prospect.

Description

technical field [0001] The invention belongs to the field of polymer material synthesis, and relates to a high heat-resistant alternating copolyamide resin PAXY / ZY and a preparation method thereof, more specifically a method of copolyamide with alternating XY units and ZY units and a production method thereof. Furthermore, the invention relates to YXY diesters, which are intermediates in the manufacture of said copolyamides. Background technique [0002] Polyamide (PA) refers to a class of polymers containing amide groups (-CONH-) on the main molecular chain. It can be prepared from diamines and dibasic acids, and can also be synthesized from omega amino acids or cyclic lactams. Polyamide is widely used to replace metals because of its high strength, good toughness, and wear resistance, and is processed into wear-resistant and high-strength parts, such as turbines, gears, bearings, etc. With the great increase in its demand, PA6, PA66, PA11, PA12, PA610, PA612, MXD6 and oth...

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): C08G69/26
CPCC08G69/265
Inventor 高远博何勇杨婷婷
Owner DONGHUA UNIV