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Preparation method for trimethylol propane modified alkyd resin for coating

A technology of trimethylolpropane and alkyd resin, used in polyester coatings, coatings, etc., can solve the problems of high drying temperature, long baking time, easy yellowing, etc. Short baking time, good color retention and baking resistance

Inactive Publication Date: 2015-12-02
ANQING LINGHU PAINT
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Short-oil alkyd resins are generally synthesized from soybean oil, glycerin, and phthalic anhydride, and are mainly used in amino baking varnishes or polyurethane two-component paints. However, the disadvantage is that the color of the resin is relatively dark, and it is easy to yellow when used as a light-colored polyurethane two-component paint. , the hardness of the paint film after baking is not good, the drying temperature is also high, and the baking time is long. With the intensification of market competition, the industry is looking for improvement measures

Method used

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  • Preparation method for trimethylol propane modified alkyd resin for coating
  • Preparation method for trimethylol propane modified alkyd resin for coating
  • Preparation method for trimethylol propane modified alkyd resin for coating

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Embodiment Construction

[0014] A preparation method of alkyd resin for coatings modified with trimethylolpropane, comprising the following steps:

[0015] (1) Take the following component raw materials by weight percentage:

[0016]

[0017] (2) Put ricinoleic acid, trimethylolpropane, phthalic anhydride and xylene for reflux into the reaction kettle according to the formula, raise the temperature to 180°C and start reflux dehydration until the temperature rises to 230°C to maintain esterification;

[0018] (3) When the acid value of the resin reaches 8--12mgKOH / g, and the viscosity reaches 200-400S (Tu-4), it is qualified, lower the temperature, add xylene to dilute, filter, and pack into barrels.

[0019] Modified alkyd resin quality standard of the present invention is as follows:

[0020]

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Abstract

The present invention relates to a preparation method of trimethylol propane modified alkyd resin for a coating. According to the present invention, a special process is used, glycerin is replaced by trimethylol propane, soybean oil is replaced by castor oil acid, and short oil alkyd resin produced by phthalic anhydride is light-colored, and is non-yellowing if being used as a polyurethane two-component coating, the produced amino baking paint is relatively high in film hardness, short in baking time, good in film alkali resistance, color retention and baking resistance, and therefore user requirements are met.

Description

technical field [0001] The invention relates to the preparation technology of alkyd resin for paint, in particular to a preparation method of alkyd resin for paint modified with trimethylolpropane. Background technique [0002] Short-oil alkyd resins are generally synthesized from soybean oil, glycerin, and phthalic anhydride, and are mainly used in amino baking varnishes or polyurethane two-component paints. However, the disadvantage is that the color of the resin is relatively dark, and it is easy to yellow when used as a light-colored polyurethane two-component paint. , the hardness of the paint film after baking is not good, the drying temperature is also high, and the baking time is long. With the intensification of market competition, the industry is looking for improvement measures. [0003] The present invention adopts a special process to replace glycerin with trimethylolpropane, and replace soybean oil and phthalic anhydride with ricinoleic acid to produce short-oi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/49C08G63/78C09D167/08
Inventor 殷若明
Owner ANQING LINGHU PAINT
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