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A kind of low-voc high-performance two-component waterborne polyurethane wood coating and preparation method thereof

A water-based polyurethane and wood coating technology, applied in the coating field, can solve the problems of great impact on physical health, rough surface of coating film, and long-term fouling resistance of coating film.

Active Publication Date: 2021-07-13
CNOOC CHANGZHOU PAINT & COATINGS IND RES INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned invention patents still use a certain amount of high-boiling film-forming aids in the preparation of coatings. Even if the amount meets the standard requirements, they will still volatilize slowly after painting or even after a long time after occupancy. Compared with volatile co-solvents It has a greater impact on the health of children living in it; the matting powder matting technology used will make the surface of the coating film rough, affecting the long-term stain resistance of the coating film, while the antifouling and anti-graffiti added in the formula After long-term use and wiping, the stain resistance and graffiti resistance of the coating film will also be greatly reduced

Method used

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  • A kind of low-voc high-performance two-component waterborne polyurethane wood coating and preparation method thereof
  • A kind of low-voc high-performance two-component waterborne polyurethane wood coating and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The low-VOC high-performance two-component water-based polyurethane wood coating of this embodiment is mainly composed of a main paint and a silicone-modified water-based aliphatic isocyanate curing agent. The main paint is mainly prepared from the following raw materials in mass percentage: water 7.2 %, silicone modified acrylic hydroxyl emulsion 92%, defoamer BYK-093 0.2%, wetting agent BYK-346 0.2%, fungicide D7LT 0.1%, thickener RM-8W 0.3%; the silicone modified The water-based aliphatic isocyanate curing agent is made of the following raw materials in mass percentage: N3900HDI trimer 84.3%, polyethylene glycol monomethyl ether 9%, 2-cyclohexylaminoethanesulfonic acid 1%, N,N-di 0.7% of methylcyclohexylamine, 5% of 3-aminopropyltriethoxysilane; the mass ratio of the main paint and curing agent is 10:1.

[0033] Above-mentioned organosilicon modified aqueous aliphatic isocyanate curing agent is made by the preparation method comprising the following steps:

[0034] ...

Embodiment 2

[0041] The low-VOC high-performance two-component water-based polyurethane wood coating of this embodiment mainly consists of a main paint and a silicone-modified water-based aliphatic isocyanate curing agent. The main paint is mainly prepared from the following raw materials in mass percentage: water 14.2 %, silicone modified acrylic hydroxyl emulsion 85%, defoamer BYK-093 0.2%, wetting agent BYK-346 0.2%, fungicide D7LT 0.1%, thickener RM-8W 0.3%; the silicone modified The water-based aliphatic isocyanate curing agent is made of the following raw materials in mass percentage: N3900HDI trimer 88.5%, polyethylene glycol monomethyl ether 4%, 2-cyclohexylaminoethanesulfonic acid 1.8%, N,N-di 0.7% of methylcyclohexylamine, 5% of 3-aminopropyltriethoxysilane; the mass ratio of the main paint and curing agent is 12:1.

[0042] Above-mentioned organosilicon modified aqueous aliphatic isocyanate curing agent is made by the preparation method comprising the following steps:

[0043] ...

Embodiment 3

[0050] The low-VOC high-performance two-component water-based polyurethane wood coating of this embodiment mainly consists of a main paint and a silicone-modified water-based aliphatic isocyanate curing agent. The main paint is mainly prepared from the following raw materials in mass percentage: water 10.2 %, silicone modified acrylic hydroxyl emulsion 89%, defoamer BYK-093 0.2%, wetting agent BYK-346 0.2%, fungicide D7LT 0.1%, thickener RM-8W 0.3%; the silicone modified The water-based aliphatic isocyanate curing agent is made of the following raw materials in mass percentage: N3900HDI trimer 86.6%, polyethylene glycol monomethyl ether 6.0%, 2-cyclohexylaminoethanesulfonic acid 1.5%, N,N-di 0.9% of methylcyclohexylamine, 5% of 3-aminopropyltriethoxysilane; the mass ratio of the main paint and curing agent is 12:1.

[0051] Above-mentioned organosilicon modified aqueous aliphatic isocyanate curing agent is made by the preparation method comprising the following steps:

[0052...

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Abstract

The invention relates to the technical field of coatings, in particular to a low-VOC high-performance two-component waterborne polyurethane wood coating and a preparation method thereof. The low-VOC high-performance two-component water-based polyurethane wood coating of the present invention is mainly composed of a main paint and a curing agent, and the main paint is mainly prepared from the following raw materials in mass percentage: 7-15% of water, silicone-modified acrylic acid Hydroxyl emulsion 85-92%, defoamer 0.1-0.3%, wetting agent 0.2-0.3%, bactericide 0.1-0.2%, thickener 0.3-0.4%; the curing agent is silicone modified water-based aliphatic Isocyanate curing agent. The low-VOC high-performance two-component water-based polyurethane wood coating of the present invention does not detect harmful substances such as volatile organic compounds, benzene, toluene, and halogenated hydrocarbons, and has good anti-graffiti properties such as ink, watercolor pens, and whiteboard markers. It is environmentally friendly and safe, and is very suitable for painting children's room furniture.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a low-VOC high-performance two-component waterborne polyurethane wood coating and a preparation method thereof. Background technique [0002] After the two-component polyurethane coating is cured, the coating film has excellent mechanical properties (high hardness, strong adhesion, and good wear resistance), good chemical resistance and weather resistance, and is very suitable for coating high-end wooden furniture. The two-component polyurethane coatings used in this field are mainly solvent-based, which produce a large amount of harmful volatile compounds during production and construction, which seriously endanger the environment and people's health, and do not conform to the development trend of environmental protection. With the further establishment and improvement of a series of environmental protection regulations and standards, the quality of decorative coatings for chil...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/04C09D5/14C09D5/16C09D7/63C09D7/65C08G18/62C08G18/73
Inventor 史立平谭伟民刘仲阳刘银郁飞雒新亮王磊
Owner CNOOC CHANGZHOU PAINT & COATINGS IND RES INST