High-fullness and shock-resistance polyurethane matte top-coat paint

A technology of impact resistance and polyurethane, applied in polyester coatings, coatings, etc., can solve the problems of reduced flexibility and achieve the effects of high fullness, good melting and dispersion, and excellent flexibility

Active Publication Date: 2014-02-12
GUANGDONG BADESE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The increase of solid content in the system will easily lead to a decrease in flexibility, so it is necessary to increase the crosslinking reaction of the solid content in the system, and at the same time take into account the flexibility of the system to solve the problems of fullness and impact resistance of the paint film

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Preparation of component A:

[0039] In a clean and standard reaction vessel, add 69 kg of castor oil alkyd resin, 8 kg of 20% vinyl acetate resin, 1.2 kg of dispersant EFKA-4010, 1 kg of leveling agent BYK-358N, and leveling agent BYK-333 0.3 kg, defoamer BYK-141 0.5 kg, MIBK 2 kg, 15% polyamide wax 5 kg, propylene glycol methyl ether acetate 4 kg, stir at a low speed of 600~800 r / min for 10 min until fully dispersed, Add 1 kg of wax powder and 7 kg of dummy powder in turn, clean the sides of the tank with a small amount of propylene glycol methyl ether acetate, stir at a high speed of 1200-1500 r / min for 10-15 min until the fineness is ≤ 25 μm, and use 1 kg of propylene glycol methyl ether acetate Ether acetate adjusts the viscosity to 2000~3500 mpa.s / 25℃, and then the A component is prepared.

[0040] Preparation of component B:

[0041] In a clean and standard dispersion container, add 5 kg of xylene and 11 kg of dehydrated n-butyl acetate in sequence. After dehyd...

Embodiment 2

[0046]Prepare the raw materials according to Table 1, and use the same method as in Example 1 to sequentially prepare component A, component B and component C.

[0047] Table 1:

[0048] .

[0049] Method of use: adopt the same method of use as in Example 1.

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PUM

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Abstract

The invention discloses high-fullness and shock-resistance polyurethane matte top-coat paint. Castor oil alkyd resin, 20% of chlorine vinegar resin, wax powder and matte powder are prepared to a component A; TDI addition curing agent L-75, TDI tripolymer curing agent 1451, HDI tripolymer curing agent HX-90B, dehydrated n-butyl acetate and xylene are prepared to a component B; n-butyl acetate, propylene glycol methyl ether acetate, acetic ether, ethylene glycol diacetate and xylene are prepared to a thinner component C during constructing; the paint is prepared by mixing the components A, B and C according to the weight ratio of 1: 0.5: (0.5-0.8). By using the characteristics of high solid content and good flexibility of the raw materials such as the castor oil alkyd resin and HDI diisocyanate, the paint of the invention improves the flexibility and the shock resistance of painted films, enables coated layers to have good transparency, high fullness and excellent flexibility and shock resistance, and is specifically suitable for coating wood artware and cane furniture.

Description

technical field [0001] The invention relates to a high-volume and impact-resistant polyurethane matt clear finish, which belongs to the wood coating manufacturing industry. Background technique [0002] The coating of wooden crafts and rattan furniture requires a polyurethane (PU) matte clear finish with high fullness and excellent impact resistance. [0003] Ordinary PU matt clear topcoats have poor filling properties and require multiple coats to achieve the required filling effect and fullness. However, multiple recoats can easily lead to excessive thickness of the paint film, poor transparency, poor impact resistance, cracking and other problems. [0004] At present, the fullness of the paint film is mainly affected by the solid content and transparency of the paint system, and the impact resistance of the paint film mainly depends on the flexibility of the paint film after the crosslinking reaction of hydroxyl and isocyanate. The increase of solid content in the system...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D167/08C08G18/68C08G18/62
Inventor 方学平严修才杨长春
Owner GUANGDONG BADESE CHEM
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