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Stable, high-transparent and permanently-smooth PU lusterless top-coat with gloss and preparation method thereof

A high-stable and clear topcoat technology, applied in coatings, polyurea/polyurethane coatings, etc., can solve problems such as poor transparency, uneven gloss, and oldness of the paint film, and achieve permanent smoothness of the coating and smooth paint film Smooth and transparent effect

Inactive Publication Date: 2017-02-01
GUANGDONG BADESE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] When spraying ordinary PU matt clear topcoat, all coating technology practitioners know that fumed silica is mainly used for glossy paint film matting, but due to the characteristics of fumed silica, it is affected by construction technology, drying time, environment, etc. Temperature, humidity, anti-settling effect and other factors are greatly affected, especially in the production of low-gloss clear topcoats, if the amount of fumed silica is large, the paint film is prone to poor transparency, uneven gloss, blooming and other paint film disadvantages ; Use silicone and wax powder to suspend on the surface of the paint film to provide a hand feel. The paint film will be worn on the furniture with time and continuous friction during use. The paint film will become old, and the transparency of the paint film will become poor and lose its original clarity. Transparency, the silky touch imparted by silicones and wax powders will disappear
As high-end furniture is more and more popular among consumers, the coating requirements are also increasing, and ordinary PU matte clear is far from meeting the high-end coating requirements.

Method used

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  • Stable, high-transparent and permanently-smooth PU lusterless top-coat with gloss and preparation method thereof
  • Stable, high-transparent and permanently-smooth PU lusterless top-coat with gloss and preparation method thereof
  • Stable, high-transparent and permanently-smooth PU lusterless top-coat with gloss and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Preparation of component A: Add 43% of short oil alkyd resin, 22% of coconut oil alkyd resin, 0.7% of anti-settling slurry, 0.8% of modified polyurethane polymer dispersant, silicone fluid Leveling agent 0.2%, defoamer (foam breaking polymer and polysiloxane solution) 0.3% and MIBK 3%, stir well at 600 rpm, then add polytetrafluoroethylene at 600 rpm 0.5% ethylene wax powder and 0.2% ED-30 matte powder, stir and disperse at 1200 rpm for 15 minutes until the fineness is ≤25UM, then add 7% nitrocellulose solution with 50% solid content, 15% PE matte wax slurry and Ethyl acetate 2.5%, stir at 800 rpm until uniform, and finally adjust the viscosity to 1400mpa.s / 25°C with 4.8% butyl acetate, and set aside;

[0034] Preparation of Component B: Add 19.3% of TDI curing agent, 5% of HI-100 solvent-free curing agent, 12% of MIBK, 10% of MEK and n-butyl acetate to 45% of 1451 bright trimer curing agent by weight percentage 8.7%, stir evenly, seal and set aside;

[0035] Preparat...

Embodiment 2

[0038] Preparation of component A: Add 47.9% of short oil alkyd resin, 21% of coconut oil alkyd resin, 0.8% of anti-settling slurry, 1.0% of modified polyurethane polymer dispersant, and silicone fluid into the dispersion tank in order by weight percentage Leveling agent 0.4%, defoamer (foam breaking polymer and polysiloxane solution) 0.4% and MIBK 2.8%, stir at 700 rpm until uniform, then add polytetrafluoroethylene at 700 rpm 0.4% ethylene wax powder and 0.8% ED-30 matte powder, stir and disperse at 1300 rpm for 12 minutes to fineness ≤ 25UM, then add 7% nitrocellulose solution with 50% solid content, 9% PE matte wax slurry and 3% ethyl acetate, stir at 900 rpm until uniform, and finally adjust the viscosity to 1700mpa.s / 25°C with 5.5% butyl acetate, and set aside;

[0039] Preparation of component B: Add 16% of TDI curing agent, 5% of HI-100 solvent-free curing agent, 12% of MIBK, 10% of MEK and n-butyl acetate to 46% of 1451 bright trimer curing agent by weight percentage ...

Embodiment 3

[0043] Preparation of component A: Add 50% of short oil alkyd resin, 19% of coconut oil alkyd resin, 1% of anti-settling slurry, 1.2% of modified polyurethane polymer dispersant, silicone fluid Leveling agent 0.5%, defoamer (foam breaking polymer and polysiloxane solution) 0.5% and MIBK 2%, stir at 800 rpm until uniform, then add polytetrafluoroethylene at 800 rpm 0.3% ethylene wax powder and 1% ED-30 matte powder, stir and disperse at 1500 rpm for 10 minutes to fineness ≤ 25UM, then add 7% nitrocellulose solution with 50% solid content, 13.2% PE matte wax slurry and 2% ethyl acetate, stir at 1000 rpm until uniform, and finally adjust the viscosity to 1000mpa.s / 25°C with 2.3% butyl acetate, and set aside;

[0044] Preparation of component B: Add 12% of TDI curing agent, 5% of HI-100 solvent-free curing agent, 12% of MIBK, 10% of MEK and n-butyl acetate to 48% of 1451 bright trimer curing agent by weight percentage 13%, stir evenly, seal and set aside;

[0045] Preparation of...

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PUM

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Abstract

The invention discloses a stable, high-transparent and permanently-smooth PU lusterless top-coat with gloss and a preparation method thereof. The PU lusterless top-coat is prepared from a component A, a component B and a component C, wherein the component A is prepared from short oil alkyd resin, coconut oil alkyd resin, anti-settling pulp, a wetting dispersant, a flatting agent, a defoaming agent, MIBK, Teflon wax powder, ED-30 lusterless powder, nitrocotton liquid with the solid content being 50%, PE flatting wax pulp, acetic ether and n-butyl acetate; the component B is prepared from a 1451 light tripolymer curing agent, a TDI curing agent, an HI-100 solvent-free curing agent, MIBK, MEK and n-butyl acetate; the component C is prepared from methylbenzene, n-butyl acetate, acetic ether, MEK and propylene glycol monomethyl ether acetate. During construction, the components A, B and C are mixed to be uniform proportionally. According to the PU lusterless top-coat, detection and trials prove that after coating, a film is good in leveling property, high in sagging prevention capacity, good in transparence, capable of keeping smooth permanently, uniform in gloss and suitable for coating of costly furniture wood products.

Description

technical field [0001] The invention belongs to the wood coating manufacturing industry, and in particular relates to a PU matt clear finish with stable luster, high transparency, permanent smoothness, and a preparation method of the PU matt clear finish. Background technique [0002] When spraying ordinary PU matt clear topcoat, all coating technology practitioners know that fumed silica is mainly used for glossy paint film matting, but due to the characteristics of fumed silica, it is affected by construction technology, drying time, environment, etc. Temperature, humidity, anti-settling effect and other factors are greatly affected, especially in the production of low-gloss clear topcoats, if the amount of fumed silica is large, the paint film is prone to poor transparency, uneven gloss, blooming and other paint film disadvantages ; Use silicone and wax powder to suspend on the surface of the paint film to provide a hand feel. The paint film will be worn on the furniture ...

Claims

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Application Information

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IPC IPC(8): C09D175/14C09D101/18C09D123/12C09D127/18C09D7/12
CPCC08L2201/10C08L2205/025C08L2205/035C09D175/14C08L1/18C08L23/12C08L27/18C08K3/346
Inventor 方学平严修才杨长春
Owner GUANGDONG BADESE CHEM
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