Two-component polyurethane paint and preparation method thereof
A two-component polyurethane and one-component technology, applied in polyurea/polyurethane coatings, coatings, etc., can solve the problems of paint film loss, yellowing, and expansion tank foam, etc., and achieves convenient operation, simple preparation process, wide range of effects
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[0062] Second aspect, the present invention provides a kind of preparation method of two-component polyurethane paint, comprises the steps:
[0063] S01. Carrying out the first mixing treatment of alkyd resin, filler, dispersant, defoamer, matting powder, and butyl acetate to obtain the first mixture;
[0064] S02. The first mixture is subjected to a second mixing treatment with the dustproof agent, leveling agent, and dehydrating agent containing -NCO-groups to obtain the first component;
[0065] S03. An inert atmosphere is provided, and the butyl acetate and the dehydrating agent containing -NCO-groups are subjected to a third mixing treatment to obtain a second mixture;
[0066] S04. Perform a fourth mixing treatment on the second mixture and the curing agent to obtain the second component.
[0067] In the preparation method of the two-component polyurethane paint, the components of the first component and the components of the second component are respectively mixed to p...
Embodiment 1
[0077] Two-component polyurethane paint
[0078] The two-component polyurethane paint comprises a first component and a second component, wherein the first component comprises the following components in the following parts by weight:
[0079]
[0080] The second component includes the following components in the following parts by weight:
[0081] 69 parts of curing agent;
[0082] 30 parts of butyl acetate;
[0083] 1 part of dehydrating agent containing -NCO- group.
[0084] Wherein, the alkyd resin is selected from soybean oil alkyd resin with an oil degree≤40%, a solid content of 70%, and an acid value of 12 mg KOH / g;
[0085] The dehydrating agent containing -NCO-group is selected from p-toluenesulfonyl isocyanate;
[0086] The filler is selected from calcium carbonate;
[0087] The dispersant is selected from unsaturated polycarboxylic acid polymers;
[0088] Defoamer is selected from polysiloxane defoamer;
[0089] The matting powder is selected from silica-...
Embodiment 2
[0100] Two-component polyurethane paint
[0101] The two-component polyurethane paint comprises a first component and a second component, wherein the first component comprises the following components in the following parts by weight:
[0102]
[0103] The second component includes the following components in the following parts by weight:
[0104] 61 parts of curing agent;
[0105] 35 parts of butyl acetate;
[0106] 4 parts of dehydrating agent containing -NCO- group.
[0107] Wherein, the alkyd resin is selected from soybean oil alkyd resin with an oil degree≤40%, a solid content of 70%, and an acid value of 12 mg KOH / g;
[0108] The dehydrating agent containing -NCO-group is selected from p-toluenesulfonyl isocyanate;
[0109] The filler is selected from calcium carbonate;
[0110] The dispersant is selected from unsaturated polycarboxylic acid polymers;
[0111] Defoamer is selected from polysiloxane defoamer;
[0112] The matting powder is selected from silica...
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Abstract
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