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Preparation method of quick-dry scratch-resistant water-borne 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: 2016-03-30
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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  • Preparation method of quick-dry scratch-resistant water-borne wood coating
  • Preparation method of quick-dry scratch-resistant water-borne wood coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Add 1000kg water, 50kg calcium chloride and 5kg CTAB into a 2000L hydrothermal reaction kettle in batches, stir to dissolve, add 10kg ammonium sulfate, stir evenly, gradually raise the temperature to 100℃, set the speed to 20rpm, and stop after 30min of hydrothermal reaction Heat the reaction. After natural cooling, put the material in the centrifuge, centrifuge at 10000rpm at -5℃ for 20min, slowly pour the supernatant into a clean centrifuge bucket, centrifuge again at 10000rpm at -5℃ for 20min, repeat this operation twice to obtain The supernatant containing the whisker micronuclei is used as the mother liquor for the subsequent reaction.

[0032] Take 10kg of the small-size solid whisker washed by centrifugation, add it to 125kg of water-based polyurethane dispersion with 40% solid content by wet-on-wet, stir and disperse, add 310g defoamer (TEGO825), defoamer (TEGO902) 155g, dispersing agent (TEGO740w) 125g, wetting agent (TEGO245) 420g, stirring and dispersing unifor...

Embodiment 2

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

[0037] Take 10kg of the small-size solid whisker washed by centrifugation, add it to 150kg of water-based polyurethane dispersion with 45% solid content by wet-on-wet method, stir and disperse, add 330g defoamer (TEGO825), defoamer (TEGO902) 165g, dispersant (TEGO740w) 129g, wetting agent (TEGO245) 427g, stir ...

Embodiment 3

[0041] Add 1350kg water, 50kg calcium chloride and 6kg CTAB into a 2000L hydrothermal reaction kettle in batches, stir to dissolve, add 11kg ammonium sulfate, stir evenly, gradually heat up to 130℃, set the speed to 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℃ for 30min, slowly pour the supernatant into a clean centrifuge bucket, centrifuge again at 12000rpm at -5℃ for 30min at high speed, repeat this operation twice to obtain The supernatant containing the whisker micronuclei is used as the mother liquor for the subsequent reaction.

[0042] Take 10kg of the small-sized solid whisker washed by centrifugation, add it to 140kg of water-based polyurethane dispersion with 42% solid content by wet-on-wet method, stir and disperse, add 326g defoamer (TEGO825), defoamer (TEGO902) 161g, dispersant (TEGO740w) 122g, wetting agent (TEGO245) 421g, stir and disperse unifor...

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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 present invention relates to the technical field of water-based coatings, and more specifically, the present invention relates to a preparation method of quick-drying and scratch-resistant water-based wood coatings. Background technique [0002] As environmental protection requirements become more and more stringent, the development, production and application of water-based coatings have become an important focus of the coatings industry. Wooden furniture and wooden home decoration materials are closely related to people's daily life, and 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 of more 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 number of oil-...

Claims

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Application Information

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Patent Type & Authority Applications(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
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