Phosphate leather retanning fatliquoring agent and preparation method thereof
A technology of retanning, fatliquoring and phosphate esters, applied in leather dipping, small hide/big hide/leather/fur treatment, small hide/big hide/leather skin/fur chemical treatment, etc., can solve the greasy surface of finished leather , long-term hardening, easy migration and other problems, to achieve the effect of improving absorption rate and water solubility
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Embodiment 1
[0024] The first step, get 98 parts of maleic anhydride, 10.8 parts of initiator benzoyl peroxide by mass parts and add in the reactor with agitator and thermometer, then add maleic anhydride and initiator total mass 3 times the organic solvent toluene, feed enough N into the reactor 2 To get rid of the oxygen in the reactor, after mixing evenly, heat up to 100°C, add 43.2 parts of 50% benzoyl peroxide aqueous solution, 104 parts of styrene and 338 parts of stearyl acrylate solution at 100°C The reaction was carried out for 6h; the whole reaction process continued to feed N 2 , to maintain the anaerobic state;
[0025] In the second step, add 200 parts of polyethylene glycol MPEG-200 to the reaction system of the first step, and react at 80° C. for 6 hours;
[0026] In the third step, control the temperature and slowly add 137 parts of phosphorylation reagent P to the product in batches at 20°C 2 o 5 (Phosphorus pentoxide), the feeding time is 1h, then the temperature is r...
Embodiment 2
[0029] The first step, get 98 parts by mass of maleic anhydride, 10.8 parts of initiator azobisisobutyronitrile and add in the reactor with stirrer and thermometer, then add maleic anhydride and initiator total mass 5 times the organic solvent N-methylformamide, feed enough N into the reactor 2 To get rid of the oxygen in the reactor, after mixing evenly, heat up to 120°C, add 43.2 parts of 50% azobisisobutyronitrile aqueous solution, 104 parts of styrene and 338 parts of octadecyl acrylate solution at the same time, at 120 ℃ for 4 hours; the whole reaction process continued to feed N 2 , to maintain the anaerobic state;
[0030] In the second step, add 500 parts of polyethylene glycol MPEG-400 to the reaction system of the first step, and react at 100° C. for 2 hours;
[0031] In the third step, control the temperature and slowly add 165 parts of phosphorylation reagent H to the product in batches at 25°C 4 P 2 o 7 (pyrophosphoric acid), the feeding time is 2h, then the ...
Embodiment 3
[0034] The first step, get 98 parts of maleic anhydride, 10.8 parts of initiator benzoyl peroxide by mass parts and add in the reactor with agitator and thermometer, then add maleic anhydride and initiator total mass 4 Times the organic solvent dimethyl sulfoxide, feed enough N into the reactor 2 To get rid of the oxygen in the reactor, after mixing evenly, heat up to 90°C, add 43.2 parts of 50% aqueous solution of azobisisobutyronitrile, 104 parts of styrene and 338 parts of stearyl acrylate solution at 90 Reaction at ℃ for 8h; the whole reaction process continued to feed N 2 , to maintain the anaerobic state;
[0035] In the second step, add 800 parts of polyethylene glycol MPEG-600 to the reaction system of the first step, and react at 95° C. for 3 hours;
[0036] In the third step, control the temperature and slowly add 150 parts of phosphorylation reagent PCl to the product in batches at 30°C 3 (Phosphorus trichloride, feed time is 1.5h, then be warming up to 70 DEG C,...
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