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Method for degrading gelled resin

A gelled resin and resin technology, applied in the field of degraded gelled resin, can solve the problems of narrow application range, etc., and achieve the effect of low equipment requirements, simple process, and easy-to-obtain raw materials

Active Publication Date: 2016-05-18
CHENGDU SUPPON CHEM IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this invention is only applicable to slightly gelatinized alkyd resins with good flow, and the scope of application is relatively narrow

Method used

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Examples

Experimental program
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Embodiment 1

[0023] A method for degrading gelatinized resin, comprising the steps of:

[0024] (1) drop into 4.4mol of trimethylolpropane, 0.3 gram of zinc acetate, 1.5 gram of hypophosphorous acid in the reactor, then mix well, heat up to 120°C, and wait for it to completely dissolve;

[0025] (2) the gelled alkyd resin (the vegetable oleic acid that contains 1.04mol, the phthalic anhydride of 2.70mol, the glycerin of 2.27mol in this gelled alkyd resin) is slowly added to the reaction kettle, and with step (1) Mix the solution evenly, then raise the temperature to 240°C, keep it warm, and the reaction time of transesterification degradation is 8 hours. At this time, the kettle liquid is a relatively uniform liquid without obvious lumps or lumps, and the viscosity has no obvious change. Finally, the temperature is lowered to 180°C. ℃;

[0026] (3) Add the vegetable oleic acid of 1.43mol and the phthalic anhydride of 2.84mol in the degradation material that step (2) obtains, be warming up...

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Abstract

The invention discloses a method for degrading gelled resin. The method comprises steps as follows: (1) polyalcohol with the boiling point higher than 190 DEG C, a catalyst and an antioxidant are added to a reaction kettle and heated until the mixture is completely dissolved; (2) the gelled resin is added to the reaction kettle and heated to 190 DEG C to 280 DEG C and has a reaction under the condition of thermal insulation until a uniform solution is obtained; (3) a degradation solution is used for resin synthesis with a conventional process, and qualified resin is prepared. According to the ester exchange principle, gelled polyester or alkyd resin is degraded by adding more polyalcohol, a degradation product is used for synthesis of polyester or alkyd resin, the purpose of waste utilization is achieved, and the qualified polyester or alkyd resin is prepared. The gelled alkyd resin, the gelled and saturated polyester or the gelled, low-activity and unsaturated polyester is taken as a raw material, and the gelling substance state is suitable for the high-viscosity liquid state, an elastomer, a solid state and a layering state.

Description

technical field [0001] The invention belongs to the field of chemical raw materials, and in particular relates to a method for degrading gelled resin. Background technique [0002] Polyester refers to a polymer oligomer synthesized by polyesterification reaction of polyol and polyacid. According to the saturation of its structure, polyester can be divided into saturated polyester and unsaturated polyester. Unsaturated polyester refers to the polyester with unsaturated double bonds in the main chain, and the polyester without unsaturated double bonds in the main chain is called saturated polyester. Polyester can be widely used as a kind of packaging material. Taking polyester bottle as an example, because the bottle made of this polymer has the advantages of light weight, unbreakable, good odor preservation and good transparency, it has been widely used. Used to pack fruit juice, tea, edible oil, medicine, cosmetics and other items. [0003] Modification of polyesters with...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J11/24C08G63/49C08L67/08
CPCC08G63/48C08J11/24C08J2367/08Y02W30/62
Inventor 袁春雷陆小辉
Owner CHENGDU SUPPON CHEM IND CO LTD
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