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A kind of alkyd resin for high-solid low-viscosity PU matte topcoat and preparation method thereof

A high-solid, low-viscosity, alkyd resin technology, applied in coatings, polyester coatings, etc., can solve the problems of polluted air environment, high VOC, non-environmental protection, etc., and achieve good matting, good adhesion, and good leveling Effect

Active Publication Date: 2019-01-18
SKSHU PAINT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve technical problems such as too high VOC, polluting the air environment, and not being environmentally friendly during the spraying construction of traditional PU matte topcoats, the invention provides a kind of alkyd resin for high-solid and low-viscosity PU matte topcoats and a preparation method thereof. The PU matte finish prepared by it not only maintains the comprehensive properties of the traditional PU matte finish, such as good matting, good hand feeling, high hardness, good fullness, good leveling, and good adhesion, but also has high solidity during spraying construction. Low viscosity, low VOC, green environmental protection and other characteristics, its VOC can reach the national duty-free standard of 420g / L when spraying, so it has great market promotion prospects

Method used

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  • A kind of alkyd resin for high-solid low-viscosity PU matte topcoat and preparation method thereof
  • A kind of alkyd resin for high-solid low-viscosity PU matte topcoat and preparation method thereof
  • A kind of alkyd resin for high-solid low-viscosity PU matte topcoat and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Add 24.77g of soybean oil fatty acid, 15.13g of pentaerythritol, 0.11g of hypophosphorous acid, and 4.13g of xylene into a four-neck flask with a stirring device in sequence, stir evenly, heat up, and heat up to 205°C in 1 hour, keep the temperature for 1 hour, and then Cool down to below 190°C, add 5.26g of neopentyl glycol, 5.77g of diethylene glycol, 0.61g of maleic anhydride, and 27.79g of phthalic anhydride, continue to heat up, and react at 200°C until the acid value is 14mgKOH / g, viscosity 500mpa.s / 25°C, then lower the temperature to below 150°C, add 16.43g butyl acetate, stir evenly for 0.5 hours, and discharge.

Embodiment 2

[0021] Add 28.66g of soybean oil fatty acid, 14.99g of pentaerythritol, 0.14g of hypophosphorous acid, and 4g of xylene into a four-necked flask with a stirring device in sequence, stir evenly, raise the temperature, and raise the temperature to 210°C in 1.5 hours, keep the temperature for 1.5 hours, and then cool Cool down to below 190°C, add 4.82g of neopentyl glycol, 5.50g of diethylene glycol, and 26.89g of phthalic anhydride, continue to heat up, and react at 200°C until the acid value is 13mgKOH / g and the viscosity is 400mpa.s / 25°C, then lower the temperature to below 150°C, add 15g of xylene, stir evenly for 0.5 hours, and discharge.

Embodiment 3

[0023] Add 30.6g of soybean oil fatty acid, 14.46g of pentaerythritol, 0.14g of hypophosphorous acid, and 3.94g of xylene into a four-necked flask with a stirring device in sequence, stir evenly, heat up, and heat up to 215°C in 1 hour, and keep the temperature for 1.6 hours, and then Cool down to below 190°C, add 4.95g of neopentyl glycol, 5.22g of diethylene glycol, and 24.9g of phthalic anhydride, continue to heat up, and react at 200°C until the acid value is 14mgKOH / g and the viscosity is 600mpa.s / 25°C, then lower the temperature to below 150°C, add 15.79g of ethyl acetate, stir evenly for 0.5 hours, and discharge.

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PUM

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Abstract

The invention relates to alkyd resin for a high-solid low-viscosity PU (polyurethane) matte topcoat and a preparation method of the alkyd resin. The alkyd resin is prepared from components in parts by weight as follows: 24-32 parts of fatty acid, 23-28 parts of polyols, 0.1-0.2 parts of an antioxidant, 3.5-4.5 parts of a backflow solvent, 23-29 parts of polyacid and 15-17 parts of a diluting solvent. By the aid of the prepared alkyd resin for the high-solid low-viscosity PU matte topcoat, the PU matte topcoat keeps combination properties including good deglossing performance, good handfeel, high hardness, good leveling property, excellent adhesion and the like of the traditional PU matte topcoat and further has the characteristics of high solids, low viscosity, low VOC (volatile organic compounds) and environmental protection during spraying construction, and the VOC during spraying can reach 420 g / L specified by the national tax exemption standard. Therefore, the high-solid low-viscosity PU matte topcoat has broad application prospect under the current national coercion environmental policy.

Description

technical field [0001] The invention relates to an alkyd resin for high-solid and low-viscosity PU matt finish paint and a preparation method thereof. Background technique [0002] The traditional PU matte topcoat has excellent comprehensive properties such as good extinction, good hand feeling, good fullness, and high hardness, but its VOC during spraying construction is basically above 600g / L, which is in line with the tax exemption stipulated in my country's new environmental protection law this year. The standard 420g / L is far from it. Therefore, research on PU paint products with high solids and low viscosity and VOC below 420g / L has become a hot spot in the industry. [0003] The alkyd resin for high-solid and low-viscosity PU matte topcoat prepared by the present invention not only maintains the comprehensive properties of traditional PU matte topcoats such as good matting, good hand feeling, high hardness, good fullness, good leveling, and good adhesion. , At the sa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/676C08G63/668C08G63/49C09D167/08
Inventor 洪杰赵子千张胜军王新潮
Owner SKSHU PAINT