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A kind of preparation method of quick-drying anti-scratch wood coating

A wood coating, water-based technology, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve the problem of unable to realize the adjustment and selection of whisker size and so on

Active Publication Date: 2017-10-24
北京嘉傲华创实业集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] These synthetic processes cannot realize the control and selection of whisker size

Method used

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  • A kind of preparation method of quick-drying anti-scratch wood coating
  • A kind of preparation method of quick-drying anti-scratch wood coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Add 1000kg of water, 50kg of calcium chloride, and 5kg of CTAB into a 2000L hydrothermal reaction kettle in batches, stir to dissolve, add 10kg of ammonium sulfate, stir evenly, gradually raise the temperature to 100°C, set the speed at 20rpm, and stop after 30min of hydrothermal reaction Heat the reaction. After natural cooling, put the material into the centrifuge, centrifuge at 10,000 rpm at -5°C for 20 minutes at high speed, slowly pour the supernatant into a clean centrifuge bucket, and centrifuge at 10,000 rpm at -5°C for 20 minutes at high speed again, repeat this operation twice, and get rich The supernatant containing whisker micronuclei was used as the mother liquor for subsequent reactions.

[0032]Take 10kg of the small-sized solid whisker washings obtained by centrifugation, and add it to 125kg of water-based polyurethane dispersion with a solid content of 40% in a wet-on-wet method, stir and disperse, add 310g of defoamer (TEGO 825), defoaming Add 155g of...

Embodiment 2

[0036] Add 1500kg of water, 50kg of calcium chloride, and 7.5kg of CTAB into a 2000L hydrothermal reaction kettle in batches, stir to dissolve, add 15kg of ammonium sulfate, stir evenly, gradually raise the temperature to 150°C, set the speed at 900rpm, and react for 60 minutes after hydrothermal reaction The heating reaction was stopped. After natural cooling, put the material into the centrifuge, centrifuge at 11000rpm at -5°C for 40min at high speed, slowly pour the supernatant into a clean centrifuge bucket, and centrifuge again at 11000rpm at -5°C at high speed for 40min, repeat this operation twice to obtain rich The supernatant containing whisker micronuclei was used as the mother liquor for subsequent reactions.

[0037] Take 10kg of the small-sized solid whisker washings obtained by centrifugation, and add it to 150kg of water-based polyurethane dispersion with a solid content of 45% in a wet-on-wet method, stir and disperse, add 330g of defoamer (TEGO 825), defoaming...

Embodiment 3

[0041] Add 1350kg of water, 50kg of calcium chloride, and 6kg of CTAB into a 2000L hydrothermal reaction kettle in batches, stir to dissolve, add 11kg of ammonium sulfate, stir evenly, gradually raise the temperature to 130°C, set the speed at 200rpm, and stop the hydrothermal reaction after 45min Heat the reaction. After natural cooling, put the material into the centrifuge, centrifuge at 12000rpm at -5°C for 30min at high speed, slowly pour the supernatant into a clean centrifuge bucket, and centrifuge again at 12000rpm at -5°C at high speed for 30min, repeat this operation twice to obtain rich The supernatant containing whisker micronuclei was used as the mother liquor for subsequent reactions.

[0042] Take 10kg of the small-sized solid whisker washings obtained by centrifugation, and add it to 140kg of water-based polyurethane dispersion with a solid content of 42% in a wet-on-wet method, stir and disperse, add 326g of defoamer (TEGO 825), defoaming Add 161g of agent (TE...

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Abstract

The invention provides a preparation method of a quick-dry scratch-resistant water-borne wood coating. The selectivity of different top and bottom coating film layers is improved by a calcium sulfate whisker and particle filler tonsure combined application technique, so the scratch-resistant property of a single-component water-borne polyurethane wood coating is improved, and the drying time of the coating film is accelerated. The preparation method comprises the following steps of performing hydrothermal reaction on calcium ions, sulfate radicals, CTAB (cetyl trimethyl ammonium bromide) and water; centrifuging at high speed to obtain whiskers with smaller long diameter as a bottom coating filler; centrifuging to obtain a supernatant as a base liquid, using a whisker micronucleus as an inducing crystal, supplementing the sulfate ions, and performing secondary hydrothermal reaction to obtain whiskers with larger long diameter as a top coating filler, wherein the hardness of the obtained coating film is 2H. The preparation method has the advantages that the defects of poor scratch-resistant property and low drying speed of the single-component water-borne wood paint are overcome, and a new technology is developed for the water-borne wood paint with low cost.

Description

technical field [0001] The invention relates to the technical field of water-based coatings, and more specifically, the invention relates to a preparation method of a quick-drying anti-scratch wood coating. Background technique [0002] As environmental protection requirements become more and more stringent, the R&D, production and application of water-based coatings have become an important focus of the coatings industry. Because wooden furniture and wooden home decoration materials are closely related to people's daily life, whether they are environmentally friendly during use has a direct impact on health. Traditional oil-based wood coatings use a large amount of thinner as a solvent, with a content greater than 20%. Among them, benzene series such as toluene and xylene are very harmful to workers during the coating process of wood production. In addition, the volatilization, spraying, scattering, and discharge of a large amount of oily paint during the painting process ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/04C09D7/12
CPCC08K7/08C09D7/61C09D7/70C09D175/04
Inventor 杨敏田昌宋观芬
Owner 北京嘉傲华创实业集团有限公司