A kind of solvent-free three-proof synthetic leather and its manufacturing method
A manufacturing method, a solvent-free technology, applied in textiles and papermaking, etc., can solve the problems of intolerance to migration, poor compatibility, etc., improve the quality of finished products and market competitiveness, eliminate organic solvent pollution and safety hazards, long-lasting hydrophobicity The effect of antifouling properties
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Embodiment 1
[0028] Embodiment 1: the manufacture of solvent-free three-proof sofa leather
[0029] (1) Preparation of fluorine-containing diisocyanate
[0030] Measure the HDI trimer and hexafluoroisopropanol in a molar ratio of 1:1 into a reaction flask with nitrogen protection and a stirring device, and react at a temperature of 45°C. After 6 hours, measure the -NCO% content. When it is the initial - After 65% of the NCO% content, the reaction is stopped to obtain a difunctional diisocyanate with a fluorine-containing side chain;
[0031] (2) Preparation of hydroxyl-terminated solvent-free fluorine-containing polyurethane prepolymer
[0032] In parts by weight, add 65 parts of polyadipate-1,3-butylene glycol ester diol with a molecular weight of 2000 after dehydration treatment into the reaction flask, and then add 15 parts of isophorone diisocyanate in sequence, step ( 1) Prepare 7 parts of fluorine-containing isocyanate, 0.03 parts of organic bismuth catalyst, heat up to 85 °C, add ...
Embodiment 2
[0038] Embodiment 2: the manufacture of solvent-free three-proof garment leather
[0039] (1) Preparation of fluorine-containing diisocyanate
[0040] Add HDI trimer and octafluoropentanol in a molar ratio of 1:1 into a reaction flask with nitrogen protection and a stirring device, and react at a temperature of 75°C. After 3 hours, measure the -NCO% content. When it is the initial -NCO After 67% of the % content, the reaction is stopped to obtain a difunctional diisocyanate with a fluorine-containing side chain;
[0041] (2) Preparation of amino-terminated solvent-free fluorine-containing polyurethane prepolymer
[0042] In parts by weight, 50 parts of polypropylene glycol with a number average molecular weight of 2000, 15 parts of polypropylene carbonate diol with a number average molecular weight of 2000, and 10 parts of polyethylene glycol with a number average molecular weight of 2000 were added to the reaction flask through dehydration, Then add 28 parts of 4,4'-dicyclo...
Embodiment 3
[0048] Embodiment 3: the manufacture of solvent-free three-proof automotive interior leather
[0049] (1) Preparation of fluorine-containing diisocyanate
[0050] Add HDI trimer and perfluorooctyl alcohol in a molar ratio of 1:1 into a reaction flask with nitrogen protection and a stirring device, and react at a temperature of 75°C. After 6 hours, measure the -NCO% content. When it is the initial -NCO After 70% of the % content, the reaction is stopped to obtain a difunctional diisocyanate with a fluorine-containing side chain;
[0051] (2) Preparation of solvent-free fluorine-containing polyurethane prepolymer capped with active functional groups
[0052] In parts by weight, 65 parts of polypropylene carbonate diol with a molecular weight of 2000 after dehydration treatment were added to the reaction bottle, and then 4 parts of hexamethylene diisocyanate, 4,4'-dicyclohexylmethane diol, 14 parts of isocyanate, 8 parts of fluorine-containing isocyanate prepared in step (1), 0...
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