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A kind of non-isocyanate polyurethane modified alkyd resin and preparation method thereof

A polyurethane-modified, non-isocyanate technology, applied in the non-isocyanate polyurethane-modified alkyd resin and its preparation, in the field of polyurethane-modified alkyd resin, can solve the problems of difficulty and inconvenience in the production process of material transportation, storage, and achieve fast hardness development , great application potential, fast drying effect

Active Publication Date: 2020-12-29
广东珠江化工涂料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in the polyurethane modification process, it is generally strictly required that the water content of the material is less than 1%, which has caused certain difficulties and inconveniences to the transportation, storage and production process of the material.

Method used

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  • A kind of non-isocyanate polyurethane modified alkyd resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] In a 2L four-necked flask equipped with a stirrer, a thermometer and a condenser, 208 g of glycerol carbonate and 53 g of ethylenediamine were added to react at 30° C. for 4 h. Then, 330 g of soybean oleic acid and 141 g of phthalic anhydride were added, the temperature was raised to 180° C. for reaction for 40 minutes, and then the temperature was raised to 240° C. to react until the acid value was less than 10mkgKOH / g. When the temperature was lowered to 180°C for 30min, 732g of 200# solvent was added to dilute to obtain a non-isocyanate polyurethane modified alkyd resin.

Embodiment 2

[0021] In a 2L four-necked flask equipped with a stirrer, a thermometer and a condenser, 208 g of glycerol carbonate and 150 g of isophorone diamine were added to react at 30°C for 5 hours. Then, 330 g of soy oleic acid and 158 g of terephthalic acid were added, the temperature was raised to 180° C. for reaction for 40 min, and then the temperature was raised to 240° C. to react until the acid value was less than 10mkgKOH / g. When the temperature was lowered to 180°C for 30min, 846g of 200# solvent was added to dilute to obtain a non-isocyanate polyurethane modified alkyd resin.

Embodiment 3

[0023] In a 2L four-necked flask equipped with a stirrer, a thermometer and a condenser, 208 g of glycerol carbonate and 102 g of hexamethylenediamine were added to react at 30°C for 4 hours. Then, 330 g of linoleic acid and 158 g of isophthalic acid were added, the temperature was raised to 180° C. for reaction for 40 min, and then the temperature was raised to 240° C. to react until the acid value was less than 10mkgKOH / g. When the temperature was lowered to 180°C for 30min, 749g of 200# solvent was added to dilute to obtain a non-isocyanate polyurethane modified alkyd resin.

[0024] Unmodified alkyd resin, isocyanate type polyurethane modified alkyd resin and non-isocyanate polyurethane modified alkyd resin were made into varnish, and the performance comparison is shown in Table 1. Compared with unmodified alkyd resin, polyurethane modified alkyd resin has faster hardness development and better corrosion resistance. The performance of the non-isocyanate polyurethane modif...

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Abstract

The invention relates to non-isocyanate polyurethane modified alkyd resin. The non-isocyanate polyurethane modified alkyd resin comprises main ingredients composed of plant oleic acid, polybasic acid,diamine and glycerol carbonate. The invention further provides a preparation method for the non-isocyanate polyurethane modified alkyd resin. The non-isocyanate polyurethane modified alkyd resin synthesized by the method integrates characteristics of polyurethane and alkyd resin, and meanwhile, the consumption of isocyanate is avoided. A coating material prepared from the resin has the advantagesof plump paint film, high drying rate, high glossiness, high hardness development speed, good adhesive power, good corrosion resistance and yellowing resistance and the like. The non-isocyanate polyurethane modified alkyd resin can be extensively applied to metallized paint, lightweight anticorrosive paint and architectural paint and has very huge potential applications.

Description

technical field [0001] The invention relates to a non-isocyanate polyurethane modified alkyd resin and a preparation method thereof, in particular to a polyurethane modified alkyd resin, belonging to the technical field of synthetic resins. Background technique [0002] Polyurethane resin contains a large number of urethane bonds and urea bonds, and these bonds contain more proton donors and acceptors that can form hydrogen bonds. The presence of hydrogen bonds improves the mechanical properties of the resin such as better abrasion resistance, higher hardness, better adhesion and chemical resistance. Although hydrogen bonds cannot be formed between ester bonds in alkyd resins, a certain amount of hydrogen bonds can be formed by introducing urethane bonds and urea bond structures after modification with polyurethane, which improves the drying rate, hardness, weather resistance, and durability of alkyd resins. Water resistance and other properties have been improved. [0003...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/91C08G71/04C09D167/08
Inventor 徐南强田巧蔡敏钊张琪黄必锋董宏伟
Owner 广东珠江化工涂料有限公司
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