玉溪Hydroxy silicone oil

Product Features：

◆Hydroxy silicone oil is an organosilicon material made of siloxane monomers with hydroxyl groups at both ends of the molecule.

◆ Its structural formula is as follows: HO-Si(CH3)2O[Si(CH3)2O]nSi(CH3)2-OH.

◆The chemical name is a,w-dihydroxy polydimethylsiloxane, and it is customary to call hydroxy silicone oil with a viscosity above 2500mPa.S as 107 silicone rubber.

◆In addition to the general properties of methyl silicone oil, this product also has hydroxyl reactivity, which can be used to make some new materials, or cross-linked into elastomers (or membranes).

◆Hydroxy silicone oil is colorless and transparent liquid, with good electrical insulation and high and low temperature resistance, high flash point, low freezing point, can be used for a long time under the conditions of -50℃～+250℃, small viscosity-temperature coefficient, high compressibility, Low surface tension, good hydrophobicity and moisture resistance, chemical inertness, physiological inertness.

Chemical Formula：

(CH3)3SｉO[（CH3）2SｉO]ｎ-Sｉ（CH3）3

Dimethicone is a colorless and transparent synthetic polymer material with a variety of different viscosities (5cps to 2 million cps), from easy-flowing liquids to thick semi-solids. This product has smoothness, softness, hydrophobicity, good chemical stability, electrical insulation and high and low temperature resistance. High flash point, low freezing point, can be used for a long time at -50℃～+200℃, small viscosity-temperature coefficient, high compressibility, low surface tension, good hydrophobicity and moisture resistance, and small specific thermal conductivity.

Technical indicators：

◆Appearance: colorless transparent liquid

◆Viscosity (25℃, mpa.s): 25～100000 (can be customized according to user requirements)

◆Hydroxy content (%): 8.5～9.5 (directly related to viscosity)

Product Usage：

Hydroxy silicone oil can be used in different industries according to the hydroxyl content and viscosity.

◆The products with medium and high viscosity are used as the base glue of paper release agent, and the cured film has good release effect. Such as the treatment of label backing paper, asphalt wrapping paper, sealing paper with backing paper, decorative paper backing paper, etc.;

◆It is used in the electric power industry as the main component of insulating paint or as a component of insulators;

◆Used as base rubber and diluent for condensed RTV silicone rubber, such as base material for sealant and mold rubber;

◆It can be used instead of dimethyl silicone oil, and it is easy to emulsify;

◆Small molecular hydroxy silicone oil (25~30CP, hydroxyl content about 8%) is the structure control agent of silicone rubber. Using it instead of diphenyldihydroxysilane not only simplifies the processing technology of silicone rubber, but also improves the processing performance (eliminating heat treatment. ), but also increased the transparency of products and improved working conditions;

Dosage：

Hydroxy silicone oil is generally used with a curing agent to achieve cross-linking curing. When used in release paper, it must be fixed with a coupling agent. Generally, the amount of curing agent accounts for 3 to 5% of the base glue, and the coupling agent accounts for 0.5% of the base glue. ～1%, in most cases, first dilute the base glue by 10 times with solvent, then add the curing agent and coupling agent, stir evenly, and then coat it on the surface of the substrate, and cure at room temperature or heating. It takes more than 30 minutes at room temperature, and 30 seconds when heated at 120-150°C. Solvent-free for sealants and mold bases. After adding the curing agent, stir well (one-component and two-component curing agents are different), and it can be cured in 30 to 120 minutes after defoaming.

Precautions：

Hydroxy silicone oil cannot be mixed with acid-base substances, alkoxysilanes and water vapor at high temperature, otherwise there is a tendency to cure and change in viscosity.

Packing and shipping：

◆Hydroxy silicone oil should be sealed and stored in clean plastic barrels, and should not be in contact with strong acids and strong alkalis;

◆Store in a cool and ventilated place at room temperature;

◆Store and transport as non-dangerous goods.

Application field：