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Currently, the greatest demand, one of the most widespread application of functional textiles refused to water-fabric. Accordingly, the research and development of water-repellent fabric finishing agents to get people's attention. Silicone surface can be low, high temperature, its handling of the fabric after smoothness, softness, good water repellency, but with the low adhesion of the fabric, poor wash durability. Polyurethane abrasion resistance, and good adhesion characteristics, as fabric finishing agent gives fabric washable better, but poor water repellency. To this end, the present method of copolymerizing the silicone and polyurethane combined to prepare a water-repellent aqueous Jia, washable, green organosilicon - polyurethane copolymer in aqueous dispersion (PSUWD), used as a repellent fabric finishing agent. In this paper, two synthetic methods prepare PSUWD. The first approach with maleic anhydride as a hydrophilic group introducing agent, N-β-aminoethyl-γ aminopropyl methyl dimethoxy silane (602) mainly the chain extender prepared PSUWD-1, while in the expansion homemade terminal amino hydrocarbon chain extender introduced polydimethylsiloxane oligomer (Sn 2 ) to improve the water repellency of the copolymer film. The second method is based on dimethylol propionic acid (DMPA) is a hydrophilic group introducing agent, SN 2 and homemade terminal amino hydrocarbon group containing a branched structure polydimethylsiloxane oligomer The (S 3 N 2 ) the chain extender preparation PSUWD-. The effects of the type of chain extender, carboxyl content, SN 2 and S 3 N 2 ratio and organic silicon content on the system particle size , rheological properties, water repellency, thermal stability and mechanical properties. The results indicate that the carboxyl group content of 1.8 wt% is appropriate, and With the S 3 N 2 increase in the proportion and the silicone content in the chain extender, the system size becomes large, water absorption decreases. Finally, determine the PSUWD-2 as reject the formulation of the optimization of the water-type fabric finishing agents, with fabric T-peel strength of 7.0N/cm, after its finished fabric to water level and washing water on grade are 3 level, resistance to hydrostatic pressure of 41.0 KPa. The reject water fabric finishing agent synthesis process is simple, good stability, performance, and broad application prospects. Innovative point of this paper is to choose the head of the trifunctional hydrocarbon chain of castor oil and homemade SN of 2 with S 3 N 2 , as a raw material, and significantly improve System of water repellency, and reducing costs.
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