Water-borne polyurethane coating agent containing superfine down fiber-polylactic acid microspheres
A polylactic acid microsphere, water-based polyurethane technology, applied in fiber processing, textiles and papermaking, etc., can solve the problems of poor moisture permeability, unfavorable large-scale production, poor hydrophobicity of silk fibroin, etc. Use experience, improve the effect of easy moisture absorption
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[0013] The coating agent of this embodiment is prepared from the following raw materials in parts by weight: water-based polyurethane emulsion 30 with a solid content of 30%, ultra-fine down fiber polylactic acid microspheres 1, dispersant 0.1, water-based defoamer 0.1, deionized water 10 .
[0014] Wherein the preparation method of ultra-fine down fiber-polylactic acid microspheres is:
[0015] (1) After removing impurities, disinfection, cleaning and drying, the down is cut and pulverized by a high-speed shearing machine, and passed through a 625-mesh sieve. Then the sieved material is put into the refiner, and anhydrous ethanol is used as the grinding medium for refining. After grinding for 2 hours, dry at 60 °C to make ultra-fine down fibers;
[0016] (2) Dissolve polylactic acid in dichloromethane to prepare a solution with a concentration of 5%, then add the ultra-fine down fibers obtained in step (1), ultrasonically stir and disperse for 20 minutes, add absolute ethano...
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