Organosilicone copolyester

A technology of silicone oligomer and copolyester, applied in the direction of one-component polyester rayon filament, etc., can solve the problem of restricting the performance of copolyester and its reproducibility, unfavorable silicone copolyester, heat resistance, etc. , poor water resistance and other problems, to achieve the effects of excellent thermal stability, uniform and stable reaction, and low water resistance

Active Publication Date: 2013-09-18
CHINESE TEXTILE ACAD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Polyester resin has good physical and mechanical properties and chemical corrosion resistance, and has been widely used in many industries, but its heat resistance and water resistance are poor, which limits its application; while silicone resin has excellent heat resistance , weather resistance, water resistance and low surface tension, but its solvent resistance is not good
[0003] For organosilicon monomers or oligomers, their compatibility with polyester systems is poor, and it is easy to cause heterogeneous reactions and non-repetitive reactions during the polymerization process, which seriously restricts the performance of copolyesters. Performance and reproducibility are not conducive to obtaining higher molecular weight organosilicon copolyesters, so the current organosilicon copolyesters are mainly used in the coating industry that does not require high molecular weight. Synthesis and application research are also mainly concentrated here

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Terephthalic acid and ethylene glycol with a molar ratio of 1:1.15, as well as catalyst antimony acetate and stabilizer triphenyl phosphite are added to the mixing device, and the amount of catalyst is 0.01% of the total mass of organosilicon copolyester. The dosage of the stabilizer is 0.005% of the total mass of the silicone copolyester. After mixing, add it to the esterification reactor for esterification reaction. The temperature of the esterification reaction is 240°C; after the esterification rate reaches more than 90%, add the silicone oligomer to the reaction system. The structure of the silicone oligomer The short formula is:

[0038]

[0039] Wherein R "is hydroxyl, n value is 25, R 1 , R 2 is methylene, R and R' are methyl, and the amount of silicone oligomer added is 1% of the total mass of silicone copolyester. After mixing evenly, the temperature was raised to 255°C at the same time to carry out pre-condensation reaction, the pressure was 0.9KPa, and...

Embodiment 2

[0042] Terephthalic acid and ethylene glycol with a molar ratio of 1:1.15, catalyst antimony acetate and stabilizer triphenyl phosphite are added to the mixing device, and the amount of catalyst is 0.1% of the total mass of organosilicon copolyester. The dosage of the stabilizer is 0.1% of the total mass of the silicone copolyester. After mixing, add it to the esterification reactor for esterification reaction. The temperature of the esterification reaction is 265°C; after the esterification rate reaches more than 90%, add the silicone oligomer to the reaction system for further esterification reaction, and the silicone oligomer The structure of the substance is simplified as:

[0043]

[0044] Wherein Rf is carboxyl, n value is 22, R 3 , R 4 It is methylene, and the amount of silicone oligomer added is 2% of the total mass of silicone copolyester. After mixing evenly, the temperature was raised to 255°C at the same time to carry out pre-condensation reaction, the pressu...

Embodiment 3

[0047] Terephthalic acid and ethylene glycol with a molar ratio of 1:1.15, catalyst antimony acetate and stabilizer triphenyl phosphite are added to the mixing device, and the amount of catalyst is 0.05% of the total mass of silicone copolyester. The dosage of the stabilizer is 0.05% of the total mass of the silicone copolyester. After mixing, it is added to the esterification reactor for esterification reaction. The temperature of the esterification reaction is 250°C; Silicon oligomers are added to the reaction system, and the structural formula of silicone oligomers is:

[0048]

[0049] Wherein R " is hydroxyl, n value is 24, R 1 , R 2 for C 10 Alkyl group, R, R' is C 10 The alkyl group, the amount of silicone oligomer added is 5% of the total mass of silicone copolyester. After mixing evenly, the temperature was raised to 255°C at the same time to carry out pre-condensation reaction, the pressure was 0.9KPa, and the reaction time was 45min. After the pre-condensati...

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Abstract

The invention belongs to the field of high polymer materials and particularly relates to anorganosilicone copolyester. The organosilicone copolyester is formed by copolymerizing aromatic dicarboxylic acid, aliphatics dihydric alcohol and organosilicone oligomer, the condensed structural formula of the organosilicone oligomer is as shown in the specifcation, wherein in the formula, R1, R2, R3, R4, R and R' are respectively alkyl of C1-C10 or alkoxyl of C2-C10; R'' is hydroxyl, carboxyl or amino, preferably hydroxyl; Rf is hydroxyl; and the value of n ranges from 1 to 106. The organosilicone copolyester is higher in molecular weight, has excellent thermal stability, mechanical property and organic solvent resistance, and is beneficial to the forming of fibers.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to a silicone copolyester polymer material. Background technique [0002] Polyester resin has good physical and mechanical properties and chemical corrosion resistance, and has been widely used in many industries, but its heat resistance and water resistance are poor, which limits its application; while silicone resin has excellent heat resistance , weather resistance, water resistance and low surface tension, but its solvent resistance is not good. [0003] For organosilicon monomers or oligomers, their compatibility with polyester systems is poor, and it is easy to cause heterogeneous reactions and non-repetitive reactions during the polymerization process, which seriously restricts the performance of copolyesters. Performance and reproducibility are not conducive to obtaining higher molecular weight organosilicon copolyesters, so the current organosilicon copolyester...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/695C08G77/445D01F6/92
Inventor 李志勇杨喆钟淑芳陈伟
Owner CHINESE TEXTILE ACAD
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