Organosilicon hydroxyl silicone oil is a polysiloxane with hydroxyl terminating group. It is an oily liquid with the characteristics of methyl silicone oil. Hydroxyl silicone oil with low viscosity is an excellent structure control agent in the processing of silicone rubber. Also used as fabric, leather, paper waterproof, soft and anti-stick treatment agent, widely used in coating, electronics, biological medical, food, personal care and other fields.In hydroxyl silicone oil, si-o has higher thermal stability. The stability of the Si-O-Si bond can be improved by dipole induction effect on the connected hydrocarbon groups on Si atoms. The structure of sio2 chain also gives organosilicone low surface tension and weak intermolecular force, and hydroxyl silicone oil has good hydrophobicity due to its special structure. Methyl molecular inter-atomic forces between the molecules and six inverse proportion of the distance, the distance become ambassador molecular inter-atomic forces is weakened, so the dimethyl siloxane molecules force is much weaker than hydrocarbons, so its surface tension is smaller than the similar molecular weight hydrocarbons, low surface tension of polysiloxane make hydroxyl silicone oil is easy to spread out on the interface.With the increasing awareness of environmental protection, the traditional solvent polyurethane is gradually withdrawn from the market, replaced by a green environmental material - waterborne polyurethane. However, waterborne polyurethane has introduced hydrophilic chain extender or hydrophilic chain segment in the synthesis process, which leads to its poor water resistance. In order to make up for the shortage of waterborne polyurethane, the combination of hydroxyl silicone oil and polyurethane is an effective solution. Hydroxyl silicone oil with low surface energy, hydrophobic good, good weather resistance, etc are widely used in modification of waterborne polyurethane, by both the copolymerization modification is an effective way to overcome the single polymer defects, polyurethane silicone copolymer product has the advantages of both, for example, good flexibility, excellent water resistance, good surface enrichment ability, good biocompatibility, a variety of market demand. In addition, due to its special structural characteristics, polyurethane silicone softener has some excellent characteristics that other softeners do not have, which can ensure the excellent soft feel of the fabric while giving the fabric a plump elastic dry feel, which can meet the needs of high-end occasions, and has a broad market prospect.