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A high-volume, high-volume, impact-resistant polyurethane matt clear finish

A technology of impact resistance and polyurethane, applied in the direction of polyester coatings, coatings, etc., can solve the problems of reduced flexibility and achieve the effects of high fullness, improved overall solid content, and fast drying rate

Active Publication Date: 2016-06-15
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 69kg of castor oil alkyd resin, 8kg of 20% vinyl acetate resin, dispersant EFKA-40101.2kg, leveling agent BYK-358N1kg, leveling agent BYK-3330.3kg, defoamer BYK-14 10.5kg, MIBK 2kg, 15% polyamide wax 5kg, propylene glycol methyl ether acetate 4kg, stir at a low speed of 600~800r / min for 10min until fully dispersed, add 1kg of wax powder, 7kg of matte powder in turn, and use a small amount of propylene glycol Clean the side of the tank with methyl ether acetate, stir at a high speed of 1200~1500r / min for 10~15min, until the fineness is ≤25μm, adjust the viscosity to 2000~3500mpa.s / 25℃ with 1kg propylene glycol methyl ether acetate, and then A components.

[0040] Preparation of component B:

[0041] In a clean dispersion container that meets the standards, add 5kg of xylene and 11kg of dehydrated n-butyl acetate in sequence. After dehydration, add curing agent L-7513kg, curing agent IL145...

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

A high-volume impact-resistant polyurethane matt clear finish of the present invention is prepared from castor oil alkyd resin, 20% vinyl acetate resin plus wax powder and matte powder to prepare component A, and TDI adduct curing agent L-75 , TDI trimer curing agent 1451, HDI trimer curing agent HX-90B and dehydrated n-butyl acetate, xylene to prepare component B, with n-butyl acetate, propylene glycol methyl ether acetate, ethyl acetate, ethyl Glycol diacetate and xylene are prepared as component C of the diluent during construction, which is prepared by mixing components A, B, and C at a weight ratio of 1:0.5:0.5-0.8. The invention utilizes castor oil alkyd resin, HDI hexamethylene diisocyanate and other raw materials with high solid content and good flexibility to improve the flexibility and impact resistance of the paint film, so that the coating after painting has good transparency, high fullness, Excellent flexibility and impact resistance, very suitable for coating wooden crafts and rattan 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 Patents(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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