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
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[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 d...
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[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 an...
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 ...
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