Solvent-free single-component polyurethane waterproof coating and preparation method thereof
A polyurethane waterproof, one-component technology, applied in the field of coatings, can solve problems such as poor sag resistance at high temperature, and achieve the effects of strong adhesion, improved sag resistance and bond strength, and good sag resistance.
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Embodiment 1
[0029] Preparation materials: 20 parts of polyether diol, 3 parts of polyether triol, 5 parts of carbodiimide modified MDI, 30 parts of talcum powder, 5 parts of imine latent curing agent, 15 parts of low viscosity plasticizer, 3 parts of rheology additive, 0.1 part of FEP micropowder, 0.1 part of modified α-zirconium phosphate, 0.05 part of catalyst, 0.2 part of Additive Ti dehydrating agent;
[0030] The rheological additive is a mixture of basic calcium sulfonate gel, PVC paste resin, and sodium fluozirconate, and the mass ratio of the three is 5:3:1.
[0031] Among them, the low-viscosity plasticizer is a mixture of bis(2-ethylhexyl)cyclohexane-1,2-dicarboxylate and bis(2-propylheptyl)phthalate (DPHP). The ratio is 1:1.
[0032] Wherein the polyether diol molecular weight is 2000, and the polyether trihydric alcohol molecular weight is 4800.
[0033] Preparation:
[0034] S1. After cutting one-third of the low-viscosity plasticizer and rheological additive, add dehydrat...
Embodiment 2
[0039] Preparation: 30 parts of polyether diol, 10 parts of polyether triol, 10 parts of carbodiimide modified MDI, 55 parts of talcum powder, 10 parts of imine latent curing agent, 30 parts of low viscosity plasticizer, 10 parts of rheology additive, 0.5 part of FEP micropowder, 0.5 part of modified α-zirconium phosphate, 2 parts of catalyst, 1 part of Additive OF dehydrating agent;
[0040] The rheological additive is a mixture of activated nano-kaolin, PVC paste resin, and modified urea, and the mass ratio of the three is 5:2:1.
[0041] Among them, the low-viscosity plasticizer is a mixture of chlorinated palm oil methyl ester and alkylbenzene sulfonate, and the mass ratio of the two is 1:1.
[0042] Wherein the polyether diol molecular weight is 2000, and the polyether trihydric alcohol molecular weight is 4800.
[0043] Preparation:
[0044] S1. After cutting one-third of the low-viscosity plasticizer and rheological additive, add dehydrating agent and stir for later u...
Embodiment 3
[0049] Material preparation: 25 parts of polyether diol, 6 parts of polyether triol, 8 parts of carbodiimide modified MDI, 40 parts of talcum powder, 8 parts of imine latent curing agent, 20 parts of low viscosity plasticizer, 5 parts of rheology additive, 0.3 part of PTFE micropowder, 0.3 part of modified α-zirconium phosphate, 1 part of catalyst, 0.6 part of Additive Ti dehydrating agent;
[0050] The rheological additive is a mixture of basic calcium sulfonate gel, PVC paste resin, and sodium fluorozirconate, and the mass ratio of the three is 6:3:1.
[0051] Among them, the low-viscosity plasticizer is a mixture of bis(2-ethylhexyl)cyclohexane-1,2-dicarboxylate and bis(2-propylheptyl)phthalate (DPHP). The ratio is 1:1.
[0052] Wherein the polyether diol molecular weight is 2000, and the polyether trihydric alcohol molecular weight is 4800.
[0053] Preparation:
[0054] S1. After cutting one-third of the low-viscosity plasticizer and rheological additive, add dehydrating...
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Abstract
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