Organosilicon hydroxy silicone oil is a polysiloxane with a hydroxyl end group, an oily liquid, and has the characteristics of methyl silicone oil. Low-viscosity hydroxy silicone oil is an excellent structure control agent in the processing of silicone rubber. Under the catalysis of organotin, it can undergo condensation reaction with hydroxyl or alkoxy compounds, which can replace diphenylsilanediol, simplify the process and improve process performance. , Hydroxyl silicone oil and silicone rubber structure control agent with a molecular weight of 50,000 to 60,000. It is also used as a waterproof, soft and anti-adhesive treatment agent for fabrics, leather, and paper, and is widely used in coatings, electronics, biomedicine, food, personal care and other fields.

In hydroxy silicone oil, Si-O has high thermal stability; the Si-O-Si bond has a dipole induction effect on the hydrocarbon group connected to the Si atom, which can improve its stability. The structure of silicone chain also endows silicone with low surface tension and weak intermolecular force, and hydroxyl silicone oil has good hydrophobicity due to its special structure. The intermolecular force of methyl groups is inversely proportional to the sixth power of the distance between molecules. The larger the distance, the weaker the intermolecular force, so the molecular force of dimethylsiloxane is much weaker than that of hydrocarbons, so it The surface tension of polysiloxane is smaller than that of hydrocarbons with similar molar mass, and the low surface tension of polysiloxane makes it easy to spread the hydroxyl silicone oil on the interface. With the enhancement of people's awareness of environmental protection, traditional solvent-based polyurethane has gradually withdrawn from the market and replaced by a green and environmentally friendly material - water-based polyurethane. Hydroxy silicone oil is widely used in modified waterborne polyurethane due to its advantages of low surface energy, good hydrophobicity and good weather resistance. Copolymerization modification of the two is an effective way to overcome the defects of a single polymer. Polyurethane silicone copolymerization products have both The advantages of both, such as good flexibility, excellent water resistance, excellent surface accumulation ability, and good biocompatibility, can meet various market demands. Moreover, due to its special structural characteristics, polyurethane silicone makes this softener have some excellent features that other softeners do not have. It can not only ensure the excellent soft feel of the fabric, but also endow the fabric with a plump, elastic and dry feel, which can meet the needs of high-end consumers. Occasion needs, with broad market prospects.
Used as leather finishing agent
The film-forming material in the finishing layer has a great influence on the physical properties of the finished leather, especially the top coating endows the surface of the finished leather with properties such as water resistance, solvent resistance, and mechanical abrasion resistance, which play 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 the coated leather is poor. This shortcoming can be improved by adding hydroxy silicone oil. Hydroxy silicone oil is a kind of material with good hydrophobicity, air permeability and weather resistance. If it is used in the synthesis and modification of water-based polyurethane, the leather obtained after coating will have better wet rub resistance and smoother hand feeling. comfortable.
Used as a leather back sealer
When some leather back covers are painted, the coating will peel off because the coating is not resistant to the immersion damage of the solvent in the shoe adhesive. Hydroxy silicone oil has the advantages of good air permeability, weather resistance, corrosion resistance and non-toxicity. It can effectively solve the peeling phenomenon when the back cover is painted.
Textile Auxiliaries
In the textile and garment industry, it can be used as fabric softener, lubricant, waterproofing agent, finishing agent, etc. In order to meet the high-end needs of textiles, chemical products are also constantly developing hydroxy silicone oil that can be used in the same bath with various functional additives such as waterproofing agents, flame retardants, antistatic agents, and color fixing agents, and has a good hand feeling. In addition, in order to improve the performance of fabrics, there are also hydroxy silicone oil products that can be used in the same bath as dyeing, silicone oil for cotton with a cool feeling, and hydroxy silicone oil products that can improve the fabric handle, and can give fabrics excellent darkening effect and storage stability. Good, does not affect color fastness, good hand feel, hydroxy silicone oil darkening agent, etc. In addition to being used as an additive in textiles to realize the functionalization of textiles, hydroxy silicone oil products will also be applied to other fields in textiles, such as the combination of silicone and polyurethane to form a fabric coating; the polymerization of silicone and acrylic to form a fabric printing; organic The combination of silicon and organic fluorine forms a waterproof coating on the surface of the fabric, etc.
Used in paint industry
Hydroxysilicone oil can improve the production process of coatings, maintain the storage stability of coatings, improve its construction process, improve product quality, and give coatings some special functions, such as leveling, anti-scratch, anti-blocking, pigment dispersion, smoothness , Surface special effects, wetting, hydrophobic, defoaming and anti-foaming, etc. Now hydroxy silicone oil has become an indispensable component in coatings. Reasonable and correct selection of hydroxy silicone oil additives can effectively reduce costs and improve benefits. Depending on the coating system, the selected hydroxy silicone oil additives are also different, but each additive has multiple functions, and sometimes it can also be used in other systems.


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