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Oct 16, 2017
The principle of water repellent of silicone milk: When the polysilicone milk heated to 140 ℃ or more, the polysiloxane in the fabric orientation, hydrophobic base - CH3 outward, polysilicone oil emulsion silicon atoms, oxygen atoms and fiber Some atoms form valence bonds and hydrogen bonds, so water vapor, air through the fabric, water droplets can not pass. Polyether oil emulsion chain at the top of the hydroxyl and hydrogen-containing silicone oil grafting, that is, hydrogen-containing silicone oil Si. The H bond is hydrolyzed into Si. H, which is dehydrated with silicone oil hydroxyl grafting to form long-chain molecules, molecules become larger, more soft, can increase the water repellency. Silicone oil and hydrogen-containing silicone oil at 150-180 ° C are crosslinked on the surface of the fabric to form a polyorganosiloxane resin film which is insoluble in water and solvent. Silane structure in the methyl out, resulting in water repellency, membrane discontinuity and permeability.