Preparation method of organic fluorine modified polyurethane elastomer resin, coating and back plate
A polyurethane elastomer and organic fluorine technology, which is applied in the field of solar cells, can solve the problems of limited application, disadvantage of sand impact resistance, etc., and achieve the effects of good falling sand resistance and good weather resistance.
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[0027] The preparation method of organic fluorine modified polyurethane elastomer resin provided by the invention comprises the following steps:
[0028] (1), mixing the small molecule polyol containing fluorine elements or the mixture of small molecule polyols containing fluorine elements with small molecule polyester polyols, small molecule chain extenders containing at least two hydroxyl groups, and solvent; and drop Add small molecule isocyanate or a mixture containing small molecule isocyanate, heat and stir, and react for 1-6 hours at a temperature of 40-120°C to form a hydroxyl-terminated polyurethane elastomer prepolymer;
[0029] (2) When the temperature is 40-120°C, continue to add small molecule isocyanate or a mixture containing isocyanate dropwise to the hydroxyl-terminated polyurethane elastomer prepolymer treated in step (1), and react for 2-4 hours , to carry out the chain extension reaction;
[0030] (3) When the temperature is 40-120°C, add a catalyst dropwi...
Embodiment 1
[0046] (1) Propylene glycol methyl ether acetate is dewatered with 4A molecular sieves so that its water content is less than 50PPM. 2 Protection, adding 100 parts of fluorine-containing polyether diol ZDOL 100 parts, 25 parts of hydroxyl-terminated polybutadiene, 1.5 parts of neopentyl glycol, 1.3 parts of dimethylol propionic acid, 45 parts of propylene glycol methyl ether acetate , turn on the mixer; add 5.75 parts of isophorone diisocyanate (IPDI) dropwise within 30 minutes. After the dropwise addition, raise the temperature to 80° C. and keep the temperature for 2 hours to form a hydroxyl-terminated polyurethane elastomer prepolymer.
[0047] (2) Add 2.88 parts of isophorone diisocyanate dropwise to the hydroxyl-terminated polyurethane elastomer prepolymer after the treatment in step (1), and keep warm at 80° C. for 2 hours.
[0048] (3), 2.87 parts of isophorone diisocyanate, 0.01 part of dibutyltin dilaurate, 45 parts of propylene glycol methyl ether acetate are added d...
Embodiment 2
[0051] Get 100 parts of organic fluorine modified polyurethane elastomer resin prepared in Example 1, then add 20 parts of rutile titanium dioxide, 8 parts of polycrystalline mullite fiber, 8 parts of ceramic micro ball, 0.3 parts of leveling agent, 1 part of dispersant, 1 part of antioxidant, 0.3 parts of light stabilizer, and 1.3 parts of ultraviolet absorber to form a coating with wind and sand resistance.
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