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Preparation method for scratch-resistant and yellowing-resistant polyurethane carpentry matte white finish

A technology of anti-yellowing and polyurethane, applied in polyurea/polyurethane coatings, coatings, etc., can solve problems such as brittleness, yellowing of the coating film, and yellowing of the substrate to cover up, and achieve good leveling and soft hand feeling Effect

Inactive Publication Date: 2013-04-17
UNION FOSHAN CHEM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the white topcoat used in home decoration cannot be masked by the substrate to hide its yellowing
At this time, if the resin is improperly selected in the formula of the main agent component, it is very easy to cause the coating film after construction to turn yellow quickly in a short time, especially in the northern part of the coating film, it is easy to be brittle at low temperature, so brittle cracking and yellowing Change is the most important quality problem of PU matte white finish in the home improvement market

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] According to the formula weight ratio, add 8 parts of mixed solvent into the dispersion tank, add 48 parts of alkyd resin with 60% solid content, stir and dissolve evenly, then add 28 parts of titanium dioxide, 8 parts of heavy calcium powder, 4 parts of matting powder, dispersant 0.5 parts, disperse at high speed for 30-40 minutes, add 0.3 parts of titanate modified silicone chelating leveling agent, 0.2 parts of modified siloxane defoamer, 3 parts of polyamide wax under low-speed stirring, and stir after passing the test The first component of anti-scratch and anti-yellowing polyurethane woodware matte white finish is obtained by filtering and packaging.

Embodiment 2

[0027] Add 40 parts of TDI / TMP adduct, 25 parts of HDI trimer, and 35 parts of mixed solvent into the dispersion tank and stir evenly. After passing the test, filter and pack to prepare the anti-scratch and anti-yellowing polyurethane wood matte white finish B component.

[0028] Mix the paint according to the ratio of component A: component B = 1:0.5, and add thinner to adjust the viscosity to be brushable.

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Abstract

The invention relates to a preparation method for scratch-resistant and yellowing-resistant polyurethane carpentry matte white finish. The finish comprises a component A of resin paint and a component B of curing agent; the weight proportioning of the component A and the component B is 1:0.5; the component A of resin paint comprises alkyd resin, titanium dioxide, extinction powder, coarse whiting powder, dispersant, light stabilizer, flatting agent, defoaming agent, anti-settling agent and solvent; and the component B of curing agent comprises TDI-HDI mixed tripolymer or TDI / TMP addition product, HDI tripolymer and solvent. The scratch-resistant polyurethane carpentry matte white finish, produced by the method, has no precipitate during storing, takes a high-solid and low-viscosity shape, and has the advantages of good leveling property, large thickness of once formed films without generating sags, mild hand feel, fullness, fineness, smoothness, coexistence of hardness and softness, and plump decoration effect as mirror face, gives elegant and comfortable feelings to people, adapts to the modern aesthetic view, is popularized in markets, and is favored by clients. The paint is widely applied in the surface of a product, such as carpentry, metal, plastic and the like, and is used as protection decoration.

Description

technical field [0001] The invention relates to a preparation method of a two-component polyurethane wood matt white finish, in particular to an anti-scratch and anti-yellowing polyurethane wood matt white finish suitable for various types of wood. Background technique [0002] With the improvement of people's material and cultural living standards, consumers have higher and higher requirements for the coating effect of furniture, which has led to the rapid growth of domestic wood coatings. The coating effect of the furniture surface will directly affect consumers' choice of furniture, and matt wood coatings occupy a large market share in the furniture coating market. Today's huge wood paint market has higher and higher requirements for paint products. Especially wood polyurethane (PU) paint has excellent comprehensive performance and is widely used by consumers. However, the product has many shortcomings, such as whitening, foaming, and peeling. layer, not resistant to scr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/14C09D7/06C09D7/02C09D7/12C09D7/45C09D7/47
Inventor 许钧强李泽刚康伦国欧永杰姚东生
Owner UNION FOSHAN CHEM
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