Synthetic method of poly(succinimide) and poly(succinimide) copolymer

A polysuccinimide copolymer, the technology of polysuccinimide, is applied in the polymerization to synthesize polysuccinimide or polysuccinimide copolymer. It can solve the problems of dark product color, small molecular weight range and small output, and achieve the effect of improved product performance, fast heating speed and fast reaction speed.

Inactive Publication Date: 2009-01-21
李绍通
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are problems in this method: when the amount of catalyst added exceeds 0.3 (molar ratio), there will be agglomeration of reactants to hinder the normal operation of the reactor, the product color is dark, and the molecular weight range is small, etc.
[0017] Microwave chem...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035]Add a mixture of 100 g of L-aspartic acid and catalyst 85% phosphoric acid in a heat-resistant glass dish or a teflon plastic dish. The amount of 85% phosphoric acid added is 8% of that of L-aspartic acid. Put the mixture into a light wave microwave reactor, first heat the mixture with light wave for 1 minute, then heat and polymerize with 800W 2450MHz microwave for 6min, and obtain 74 grams of foamy light yellow fluffy solid polysuccinimide. The average number average molecular weight was 5500.

Embodiment 2

[0037] Put the light wave microwave reactor in a vacuum environment, turn on the light wave microwave heating, and then vacuumize.

[0038] Add a mixture of 200 grams of L-aspartic acid and catalyst 85% phosphoric acid in a heat-resistant glass dish or a teflon plastic dish. 85% phosphoric acid added is 35% of L-aspartic acid. Put the mixture into a light wave microwave reactor, first heat the mixture with light wave for 2 minutes, then set the 800W 2450MHz microwave heating time to 15min, then start vacuuming, the vacuum degree is -0.08MPa. Obtained 129 grams of foamy withered yellow fluffy solid polysuccinimide. The average number average molecular weight was 56,000.

Embodiment 3

[0040] Add the mixture of 200 grams of monoammonium maleate and catalyst potassium dihydrogen phosphate in a heat-resistant glass dish or a polytetrafluoroplastic dish. 85% phosphoric acid addition is 10% of maleic acid monoammonium. Put the mixture into a light wave microwave reactor, first heat the mixture with light wave for 2 minutes, and then heat it with 800W 2450MHz microwave for 8min to obtain 145 grams of foamy brownish red fluffy solid polysuccinimide. The average number average molecular weight was 8500.

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PUM

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Abstract

The invention discloses a synthesis method for a polysuccinimide and a polysuccinimide copolymer. The method takes a mixture of asparagic acid, and maleic acid ammonium salt or fumaric acid ammonium salt, or other amino acids as a raw material, and an acidic phosphoric acid compound as a catalyst. The raw material and the catalyst are put into a light wave microwave reactor to synthesize the polysuccinimide or the polysuccinimide copolymer through solid phase polymerization in a normal pressure or vacuum status. The method solves the problems of low reaction speed, low raw material yield and unstable performance of the product. The method has the advantages of simple process, high reaction speed, high yield, energy conservation, low pollution and high quality.

Description

(1) Technical field [0001] The present invention relates to the synthesizing method of polysuccinimide (also known as polysuccinimide) and polysuccinimide copolymer. Acid monoammonium salt, or other amino acids as raw materials, acidic phosphoric acid compound as a catalyst, together in a light wave microwave reactor, under normal pressure or vacuum state, heat solid phase polymerization to synthesize polysuccinimide or polysuccinimide copolymerization thing. The invention belongs to the technical fields of polymer chemical industry and microwave chemistry. (2) Background technology [0002] Polysuccinimide and polysuccinimide copolymers are intermediates for the production of polyaspartic acid and polyaspartic acid copolymers. The intermediate polysuccinimide is a key step in determining the molecular weight of the target product polyaspartic acid and its use characteristics. Polysuccinimide is hydrolyzed to produce polyaspartic acid and its salts. [0003] Polyaspartic...

Claims

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Application Information

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IPC IPC(8): C08G73/10
Inventor 李绍通
Owner 李绍通
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