Polyester resin for hydroxyalkyl amide cured powder paint and process for preparing the same

A technology of hydroxyalkylamide and powder coatings, which is applied in powder coatings, polyester coatings, coatings, etc., and can solve the problems affecting the promotion and use of polyester/hydroxyalkylamide powder coatings and coating pinholes. The impact strength is not obtained. Effectively solve the problems such as water vapor cannot be effectively discharged, and achieve the effects of excellent thick film pinholes, improved impact strength, and improved coating leveling
CN1544505AInactive Publication Date: 2004-11-10GUANGZHOU QINGTIAN INDAL
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
GUANGZHOU QINGTIAN INDAL
Publication Date
2004-11-10
Estimated Expiration
Not applicable · inactive patent
Patent Text Reader

Abstract

The invention discloses a polyester resin for hydroxyalkyl acidamide solidified powdery paints whose constituents and proportion by weight are, terephthalic acid 75-100, m-phthalic acid 5-25, adipic acid 3-25, neopentyl glycol 50-80, 2-methyl-1, 3- propylene glycol 0-20, 1, 6-hexandiol 0-20, 1, 4-cyclohexane dimethanol 2-20, trimethylolpropane 1-3, dibutyl tin oxide 0.1-0.2, water 2-5. The invention also discloses the process for preparing the polyester resin.
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Description

Technical field

[0001] The invention relates to a polyester resin for powder coatings, in particular to a polyester resin for hydroxyalkylamide cured powder coatings, and also relates to a preparation method of the polyester resin for powder coatings. Background technique

[0002] TGIC (triglycidyl isocyanate) cured powder coatings have good weather resistance and excellent comprehensive performance, but due to the toxicity of TGIC, its application range is limited. The market has partially adopted β-hydroxyalkylamide curing agent to replace TGIC. Some literatures have reported the method of synthesizing such polyesters with polyhydric alcohols and polycarboxylic acid anhydrides under the catalysis of organotin catalysts. US Patent No. 4,801,680 discloses a method for preparing carboxyl-terminated polyester cured by hydroxyalkylamides with an acid value of about 33 mgKOH / g by using neopentyl glycol, trimethylolpropane, and Hexahydrophthalic Anhydride. However, the orange p...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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