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A kind of high-gloss environmental protection paint for wood and preparation method thereof

An environmental protection and woodware technology, applied in coatings, polyurea/polyurethane coatings, etc., can solve the problems of limited coating system formulation and coating process, low film fullness, immature water-based polyurethane curing process, etc. Better layer protection and appearance, improved film hardness, improved film fullness and gloss

Active Publication Date: 2022-07-15
佛山市高明区首邦化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the water-based wood coatings on the market are single-component water-based polyurethane dispersions. The fullness of the coating film is low, and there is a big gap between the gloss, abrasion resistance and flexibility of the commonly used solvent-based coatings.
However, the research on two-component water-based polyurethane wood lacquers started relatively late, and there is still a certain gap in the quality of existing two-component polyurethane wood lacquers compared with solvent-based ones. The curing process is immature under low temperature conditions, on the other hand, it is limited by the formulation and coating process of the coating system

Method used

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  • A kind of high-gloss environmental protection paint for wood and preparation method thereof
  • A kind of high-gloss environmental protection paint for wood and preparation method thereof

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Experimental program
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Effect test

Embodiment Construction

[0037] The present invention will be described in detail below with reference to the embodiments.

[0038] 1. Preparation of modified waterborne polyurethane dispersion

[0039] Confirm the most suitable ratio of reactant addition through multiple tests. The steps of test ① are as follows:

[0040] S01: Mix the polyether polyol N210, epoxy resin E51 and linseed oil in a mass ratio of 1.52:1:0.24, then dry and dehydrate for 4 hours at 145° C. and 100-120Pa vacuum.

[0041] S02: Mix the mixture in S01 with isophorone diisocyanate in a mass ratio of 1.3:1, and stir and react under nitrogen atmosphere for 3.4 hours.

[0042] S03: Add 1,4-butanediol to the reactant in S02 and react for 2h, then add trimethylolpropane to react at 82-85°C for 3.5h, then cool down to 60°C, then add 2,2- Dimethylolpropionic acid and N-methylpyrrolidone were reacted for 3h, and then cooled to room temperature naturally to obtain a modified aqueous polyurethane prepolymer; reactants, 1,4-butanediol, tr...

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Abstract

The invention discloses a high-gloss environment-friendly paint for wood. The components and parts by mass of the environment-friendly paint are as follows: 50-55 parts of a modified water-based polyurethane dispersion, 20-25 parts of a water-based acrylic polyurethane dispersion, and a water-based paint dispersant. 0.2-0.4 part, water 12-15 part, organotin catalyst 0.04-0.06 part, thickener 0.2-0.4 part, surfactant 1-2 part, emulsion fungicide 0.04-0.06 part, n-butyl acetate 0.005-0.008 share. The invention provides a high-gloss environment-friendly paint for wood using water as a dispersion medium, and also provides a formula, a preparation method and a coating method of the environment-friendly paint. The environmental protection paint of the present invention is applied to woodware, and the paint layer has high uniform hardness, full gloss and good appearance, and the special drying process can further improve the paint film hardness, so that the paint layer protection performance and appearance effect are better.

Description

technical field [0001] The invention belongs to the field of environment-friendly paints, and particularly relates to a high-gloss environment-friendly paint for woodware and a preparation method thereof. Background technique [0002] At present, the wood paints used for indoor furniture painting in my country are mainly solvent-based paint systems, mainly including nitro, alkyd, and polyurethane. Among them, polyurethane two-component wood paint has been widely used in the field of wood paint due to its high hardness, good toughness, and excellent water and oil resistance. However, with the concept of green and environment-friendly home being put forward, the problem that solvent-based coatings will generate a large amount of organic volatiles during the production and use process has attracted more and more consumers' attention. The emission of VOC (Volatile Organic Compound) produced by solvent-based paint products has become one of the important indicators for measuring...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/14C09D7/20C08G18/75C08G18/66C08G18/58C08G18/48C08G18/36C08G18/12C08G18/32
Inventor 彭鹏鸿
Owner 佛山市高明区首邦化工有限公司
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