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Biological based long-carbon-chain semi-alicyclic polyamidoimide copolymer and synthetic method of copolymer

A polyamide-imide copolymer and a synthesis method technology are applied in the field of bio-based long-carbon chain semi-alicyclic polyamide-imide copolymer and its synthesis, and can solve the problems of human body and environmental hazards, toxicity, and unsafe conditions. There are related reports and other problems, to achieve the effect of low dimensional stability, convenient operation and simple process

Active Publication Date: 2014-04-02
深圳市中塑新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Organic solvents have major disadvantages during use. On the one hand, additional steps are required for solvent recovery after polymer synthesis, and the precipitation of polymers in non-good solvents and the recovery of organic solvents used in polymer washing also require additional steps. steps; on the other hand, some solvents are toxic and therefore dangerous to humans and the environment
There is no relevant report on the method of synthesizing polyamide-imide copolymer by melt polymerization mechanism

Method used

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  • Biological based long-carbon-chain semi-alicyclic polyamidoimide copolymer and synthetic method of copolymer
  • Biological based long-carbon-chain semi-alicyclic polyamidoimide copolymer and synthetic method of copolymer
  • Biological based long-carbon-chain semi-alicyclic polyamidoimide copolymer and synthetic method of copolymer

Examples

Experimental program
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Effect test

preparation example Construction

[0027] (1) preparation of maleopimaric dianhydride

[0028] Gum rosin is a renewable natural chemical raw material, which contains about 90% resin acid and about 10% ester and non-saponifiable substances. The main component of resin acid is abietic acid with conjugated double bonds, and the conjugated double bonds in the molecular structure of abietic acid are not in the same alicyclic ring, so it cannot carry out Diels-Alder reaction with double bond compounds such as maleic anhydride. At high temperature, abietic acid can be converted into pimaric acid through isomerization equilibrium reaction. Maleic anhydride is obtained by diels-Alder reaction of pimaric acid with maleic anhydride. The last 2 mol of maleopimaric anhydride can prepare 1 mol of maleopimaric dianhydride under the catalysis of p-toluenesulfonic acid.

[0029] Gum rosin was purchased from Guangzhou Lvjin Resin Co., Ltd.

[0030] ①Gum rosin purifies abietic acid:

[0031] Add 210 parts by weight of gasolin...

Embodiment 1

[0051] Embodiment 1 A kind of synthetic method of bio-based long carbon chain semi-alicyclic polyamide-imide copolymer

[0052] Include the following steps:

[0053] (1) take gum rosin and castor oil as raw materials, prepare maleopimaric dianhydride and 1,10-decanediamine, 11-aminoundecanoic acid respectively, vacuum-drying;

[0054] (2) The molar ratio of dried maleopimaric dianhydride, 1,10-decanediamine and 11-aminoundecanoic acid is 1:0.9:0.5 (mass ratio is 7.390kg:1.548kg:1.005kg) Put it into the stirring type polymerization reactor, vacuumize it for 1min, and then pass helium gas for 30min, and circulate it for 20 times, so that the reactant exists in the environment under the protection of helium gas, and the system pressure in the reactor is controlled to be 0.3MPa;

[0055] (3) The reactor is sealed and heated to 110°C, the system pressure in the reactor is controlled to be 1.3MPa, the reactant is kept under pressure for 24 hours, and the gas is slowly released to n...

Embodiment 2

[0058] Embodiment 2 A kind of synthetic method of bio-based long carbon chain semi-alicyclic polyamide-imide copolymer

[0059] Include the following steps:

[0060] (1) take gum rosin and castor oil as raw materials, prepare maleopimaric dianhydride and 1,10-decanediamine, 11-aminoundecanoic acid respectively, vacuum-drying;

[0061] (2) The molar ratio of dried maleopimaric dianhydride, 1,10-decanediamine and 11-aminoundecanoic acid is 1:1:0.3 (mass ratio is 7.390kg:1.720kg:0.603kg) Put it into the stirring polymerization reactor, vacuumize it for 30 minutes, and then pass nitrogen for 1 minute. This cycle is performed once, so that the reactant exists in the environment under nitrogen protection, and the system pressure in the reactor is controlled to be 0.1 MPa;

[0062] (3) The reactor is sealed and heated to 140°C, and the stirring speed of the polymerization reactor is adjusted to 500 r / min. pressure;

[0063] (4) Continue to heat the polymerization reactor to 260° C...

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Abstract

The invention discloses a biological based long-carbon-chain semi-alicyclic polyamidoimide copolymer and a synthetic method of the copolymer. Gum rosin and castor oil are used as raw materials, maleopimaric acid anhydride, 1,10-decamethylene diamine and 11-aminoundecanoic acid are respectively prepared and are added into a stirring type polymerization reactor, and inert gas is introduced after vacuum pumping; the polymerization reactor is sealed for heating, the stirring speed of the polymerization reactor is regulated, reactants are subjected to heat insulation and pressure maintaining, and the air is released to normal pressure; and then, the polymerization reactor is heated, the stirring speed of the polymerization reactor is regulated, and the continuous vacuum pumping is carried out after the temperature is constant, and the copolymer is obtained after the reaction completion. The synthetic method disclosed by the invention is based on the melt polymerization principle, any organic solvent is not needed in the whole synthetic process, so additional steps for recovering the organic solvents are not needed, and in addition, no toxicity is generated on human bodies and environment. The synthetic polyamidoimide copolymer has good heat resistance performance, high-temperature rigidity, dimension stability and low water absorption rate and can be used for engineering plastics or film materials and the like.

Description

technical field [0001] The invention relates to a bio-based long carbon chain semi-alicyclic polyamide-imide copolymer and a synthesis method thereof. Background technique [0002] China is a big producer of gum rosin. Gum rosin is a renewable natural chemical raw material, which contains about 90% resin acid and about 10% ester and non-saponifiable substances. The main component of resin acid is abietic acid with conjugated double bonds, and the conjugated double bonds in the molecular structure of abietic acid are not in the same alicyclic ring, so it cannot carry out Diels-Alder reaction with double bond compounds such as maleic anhydride. At high temperature, abietic acid can be converted into pimaric acid through isomerization equilibrium reaction. Maleic anhydride is obtained by Diels-Alder reaction between pimaric acid and maleic anhydride. The last 2 mol of maleopimaric anhydride can prepare 1 mol of maleopimaric dianhydride under the catalysis of p-toluenesulfonic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G73/14
Inventor 朱怀才王忠强
Owner 深圳市中塑新材料有限公司
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