Polyurethane transparent primer as well as preparation method and construction method thereof

A transparent primer and polyurethane technology, applied in polyurea/polyurethane coatings, primers, coatings, etc., can solve the problems of affecting the appearance of furniture, poor filling, furniture sinking, etc., to maintain aesthetics, reduce the use of paint, The effect of reducing the number of spraying

Pending Publication Date: 2020-06-30

上海君子兰新材料股份有限公司

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AI-Extracted Technical Summary

Problems solved by technology

[0003] At present, in the furniture market, the wood with deep ducts has poor filling performance in the production of closed system products, and the use of paint is wasted. Moreover, the furniture has obvious sagging pr...

Method used

The evaluation method of fillability test: select the deep solid wood plate of wood grain conduit, spray the polyurethane varnish of three roads same viscosity, coating amount is 180g/㎡, o...

Abstract

The invention relates to the technical field of polyurethane primers, and provides a polyurethane transparent primer which comprises a component A and a component B, wherein the weight ratio of the component A to the component B is 1:(0.2-1); the component A is composed of the raw materials in percentage by weight: 50 to 70 percent of basic resin, 1 to 10 percent of granular powder, 1 to 10 percent of a first solvent, 0 to 5 percent of an auxiliary agent and the balance being a filler; the component B is composed of the raw materials: an isocyanate curing agent and a second solvent; the weightratio of the isocyanate curing agent to the second solvent is (2-10):1. The primer is an anti-bottom-biting particle polyurethane transparent primer, and is mainly applied to manufacturing of sealedhigh-grade furniture, wooden doors and other wooden products. The spraying times can be effectively reduced, and the construction period and the use of the coating are reduced.

Application Domain

Polyurea/polyurethane coatingsPriming paints

Technology Topic

IsocyanatePolymer chemistry +5

Image

Examples

Experimental program(6)
Effect test(1)

Example Embodiment

[0050] The second aspect of the present invention provides a preparation method of the polyurethane transparent primer. The steps at least include: mixing the base resin, additives, fillers, particle powder, and the first solvent to obtain component A; The isocyanate curing agent and the second solvent are mixed to obtain component B.

[0051] In some preferred embodiments, (1) mix the base resin and additives uniformly, continue to add fillers and mix uniformly, add particle powder to disperse uniformly, and finally add the first solvent and mix uniformly to obtain component A; The curing agent is added to the second solvent, added while stirring, and mixed evenly to obtain component B.

[0052] The third aspect of the present invention provides a construction method of the polyurethane transparent primer. The steps include: adding the A component and the B component into a container according to the ratio and mixing uniformly, and then adding an appropriate amount of diluent to dilute , Adjust to a suitable viscosity, and perform spraying construction; the suitable viscosity is 11-15 seconds.

[0053] The suitable viscosity test method is: before use, use a suitable solvent to wipe the Iwata No. 2 cup clean, and then immerse the Iwata No. 2 cup in the mixed liquid, so that the upper edge of the cup is lower than the horizontal surface of the mixed liquid, and then lift the cup. Press the stopwatch at the same time, when the outflow line appears for the first time, press to stop the stopwatch to read the reading, repeat three times to get the average value.

Example Embodiment

[0054] Example 1

[0055] A transparent polyurethane primer, comprising component A and component B; the weight ratio between component A and component B is 1:0.5; wherein, component A, based on weight percentage, is made of : 60% base resin, 5% granular powder, 5% first solvent, 2% auxiliary agent, filler to make up the balance; the B component, raw materials: isocyanate curing agent, second solvent; the isocyanate curing The weight ratio between the solvent and the second solvent is 5:1.

[0056] The base resin is an alkyd resin, and the alkyd resin is selected from TP3870.

[0057] The granular powder is Spanger sand flour L-40; the material of the filler is silica powder, and the average particle size of the filler is 1250 mesh.

[0058] The first solvent is ethyl acetate.

[0059] The auxiliary agent is a combination of a defoamer and a dispersant, and the weight ratio of the defoamer and the dispersant is 1:1.

[0060] The isocyanate curing agent is a combination of TDI adduct and TDI trimer. The weight ratio between the TDI adduct and the TDI trimer is 1:1.

[0061] The grade of the TDI adduct is selected from Mitsui curing agent L-75T.

[0062] The TDI trimer is selected from the brand D-268T.

[0063] The second solvent is ethyl acetate.

[0064] The amount of the dehydrating agent is 5% by weight of the solvent.

Example Embodiment

[0065] Example 2

[0066] A transparent polyurethane primer, comprising component A and component B; the weight ratio between component A and component B is 1:0.4; wherein, component A, based on weight percentage, is made of : 55% base resin, 2% granular powder, 2% first solvent, 1% auxiliary agent, filler to make up the balance; the B component, raw materials: isocyanate curing agent, second solvent; the isocyanate curing The weight ratio between the solvent and the second solvent is 4:1.

[0067] The base resin is an alkyd resin, and the alkyd resin is selected from TP3180.

[0068] The granular powder is Spanger sand flour L-30; the material of the filler is silica powder, and the average particle size of the filler is 600 mesh.

[0069] The first solvent is butyl acetate.

[0070] The auxiliary agent is a combination of a defoamer and a dispersant, and the weight ratio of the defoamer and the dispersant is 1:0.5.

[0071] The isocyanate curing agent is a combination of TDI adduct and TDI trimer. The weight ratio between the TDI adduct and the TDI trimer is 1:0.5.

[0072] The grade of the TDI adduct is selected from Mitsui curing agent L-75T.

[0073] The TDI trimer is selected from the brand HDX-50E.

[0074] The second solvent is ethyl acetate.

PUM

Property	Measurement	Unit
The average particle size	1250.0	mesh
The average particle size	600.0	mesh
The average particle size	1500.0	mesh

Description & Claims & Application Information

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Polyurethane transparent primer as well as preparation method and construction method thereof

AI-Extracted Technical Summary

Problems solved by technology

Method used

Abstract

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Examples

Example Embodiment

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Example Embodiment

PUM

Description & Claims & Application Information

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