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Catalyst for synthesis of alkyd resin and its use method

An alkyd resin and catalyst technology, which is applied in the field of catalysts for alkyd resin synthesis, can solve the problems of non-recovery of catalysts, long reaction time, limitation of huangdan, etc., and achieve the effects of shortening reaction practice, shortening reaction time, and short reaction time.

Inactive Publication Date: 2009-02-18
吴为亚
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, during the synthesis of alkyd resins, the catalysts used in the alcoholysis stage mainly include basic catalysts CaO, LiOH, lithium ricinoleate, isopropyl titanate and Huangdan, but Huangdan is limited and generally no longer used
However, the amount of the above-mentioned catalyst is relatively large, the reaction time is long, and the catalyst is usually not recycled, which seriously affects the environment and easily causes environmental pollution.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] a) Alcoholysis process: mix polyester, catalpa oil, rosin, ethylene glycol, and pentaerythritol, heat the mixture to 120°C, add indium trichloride tetrahydrate, and continue to heat the material to 240°C; carry out alcoholysis under stirring , react until the tolerance of vegetable oil is qualified, (the reaction product is dissolved in the ethanol of 95% weight concentration of 5 times of volume, the color of solution is transparent), polyester, catalpa oil, ethylene glycol, pentaerythritol, rosin, trihydrate tetrahydrate The weight ratio of indium chloride is 14:40:6:14:3:0.015;

[0026] b) Esterification and polycondensation process: When the alcoholysis qualified mixture is cooled to 200°C, install an oil-water separator containing an appropriate amount of xylene as the bottom solvent to collect the water generated by the reaction, and then add phthalic anhydride , and then add the reaction solvent xylene, react at 220 ° C until the acid value is 12, stop the reacti...

Embodiment 2

[0030] a) Alcoholysis process: mix polyester, soybean oil, rosin, ethylene glycol, and pentaerythritol, heat the mixture to 140°C, add indium trichloride tetrahydrate, and continue to heat the material to 240°C; carry out alcoholysis under stirring, React until the tolerance of vegetable oil is qualified, and the weight ratio of polyester, soybean oil, ethylene glycol, pentaerythritol, rosin, and indium trichloride tetrahydrate is 20:40:4:16:3:0.0075;

[0031] b) Esterification and polycondensation process: when the qualified alcoholysis mixture is cooled to 200°C, install an oil-water separator containing an appropriate amount of xylene as the bottom solvent to collect the water generated by the reaction, and then add isophthalic acid, Then add the reaction solvent xylene, react at 220°C until the acid value is 12, stop the reaction; the weight ratio of isophthalic acid and polyester is 15:20; the addition weight of the reaction solvent xylene accounts for 3% of the total weig...

Embodiment 3

[0035] a) Alcoholysis process: mix polyester, linseed oil, rosin, glycerin, and pentaerythritol, heat the mixture to 140°C, add indium trichloride tetrahydrate, and continue to heat the material to 240°C; carry out alcoholysis under stirring, and react Until the vegetable oil tolerance is qualified, the weight ratio of polyester, linseed oil, glycerin, pentaerythritol, rosin, and indium trichloride tetrahydrate is 20:40:5:13:3:0.0225;

[0036] b) Esterification and polycondensation process: When the alcoholysis qualified mixture is cooled to 200°C, install an oil-water separator containing an appropriate amount of xylene as the bottom solvent to collect the water generated by the reaction, and then add phthalic anhydride , then add reaction solvent xylene, react at 220°C until the acid value is 12, stop the reaction; the weight ratio of phthalic anhydride to polyester is 15:20; the addition weight of reaction solvent xylene accounts for 3% of the total weight of the resin;

[...

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Abstract

The invention discloses a catalyst for alkyd resin synthesis and an application method thereof. The catalyst is indium trichloride tetrahydrate, the application method (1) includes the procedures of alcoholysis, esterification and contraction, condensation polymerization, dilution and filtering and catalyst recovery; the application method (2) includes e) the procedure of fatty-acid reaction, f) the procedure of dilution and filtering and g) the procedure of catalyst recovery; compared with the prior art, the method can reduce the duration of existing alkyd resin synthesis from about 16 hours to about 4 hours, the color of the resin is lightened, and the catalyst is green and environment-friendly catalyst which can be recycled.

Description

technical field [0001] The invention belongs to a catalyst and its use method, in particular to a catalyst used for alkyd resin synthesis and its use method. Background technique [0002] Alkyd resin is a widely used coating resin, which is formed by the mutual reaction of polyhydric alcohol, polybasic acid or anhydride and vegetable oil or vegetable oil fatty acid. There are two main methods for the manufacture of alkyd resins: one is the alcoholysis method, and the other is the fatty acid method; Then react with polybasic acid to generate alkyd resin. At present, during the synthesis of alkyd resins, the catalysts used in the alcoholysis stage mainly include basic catalysts CaO, LiOH, lithium ricinoleate, isopropyl titanate and yellow lead, but yellow lead is limited and generally no longer used. However, the consumption of the above-mentioned catalyst is relatively large, the reaction time is long, and the catalyst is usually not recycled, which seriously affects the en...

Claims

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Application Information

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IPC IPC(8): C08G63/84C08G63/49C08G63/88
CPCY02P20/584
Inventor 吴为亚张武
Owner 吴为亚
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