Silicone hydroxy silicone oil is a polysiloxane with hydroxyl end 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 silicone rubber processing, which can replace diphenyl silicone diol, simplify the process and improve the process performance. It is also used as a waterproof, soft and anti-stick treatment agent for fabrics, leather and paper. It is widely used in coatings, electronics, biomedicine, food, personal care and other fields.


Structural characteristics of hydroxyl silicone oil
Among the hydroxy silicone oil, Si-O has high thermal stability. The Si-O-Si bond has dipole induction effect on the hydrocarbon groups connected on the Si atom, which can improve its stability. The structure of silicon-oxygen chain also endowing silicone with low surface tension and weak intermolecular force, and the hydroxy 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-based polyurethane is gradually out of the market, replaced by a green environment-friendly material - waterborne polyurethane. However, hydrophilic chain extender or hydrophilic chain segment is introduced in the synthesis process of waterborne polyurethane, which leads to its poor water resistance. In order to make up for the shortage of waterborne polyurethane, it is an effective solution to combine hydroxyl silicone oil with polyurethane. 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, Meet a variety of market needs. And polyurethane organosilicon because of its special structural characteristics, so that this kind of softener has some excellent characteristics that other softeners do not have, can ensure the fabric excellent soft feel while giving the fabric full, elastic and dry feel, can meet the needs of high-end occasions, has a broad market prospect.


Used as a leather finishing agent
The film forming material in the coating layer has a great influence on the physical properties of the finished leather, especially the top coating gives the finished leather surface water resistance, solvent resistance, mechanical abrasion resistance and other properties, which plays a decisive role in the appearance of the leather. Due to the introduction of hydrophilic ionic groups in the molecular chain of polyurethane, the water resistance of its coated leather is poor, which can be improved by adding hydroxyl silicone oil. Hydroxy silicone oil is a kind of material with good hydrophobicity, air permeability and weather resistance. If it is used in the synthetic modification of waterborne polyurethane, the leather obtained after coating will have better wet rub resistance and feel more smooth and comfortable.


Used as leather backing agent
Some leather back coating, because the coating is not resistant to the solvent in the shoe adhesive impregnation damage, will cause coating peeling, hydroxyl silicone oil because of its good air permeability, weather resistance, corrosion resistance and non-toxic advantages, can effectively solve the back coating peeling phenomenon.