Explanation

Linear polydimethylsiloxane oil-like liquid with light end groups. hydroxyl silicone oil has the characteristics of methyl silicone oil. Its viscosity can range from very small to tens of thousands of pascals per second, and its hydroxyl content can vary from a few ten thousandths to a few percent. The biggest feature of hydroxyl silicone oil is that the end group has reactive active hydroxyl groups. Under the catalysis of organotin, hydroxyl and hydroxyl groups as well as hydroxyl and alkoxy groups can be condensed to form crosslinking elastomers. The viscosity of typical hydroxyl silicone oil (25 ° C) is 40mPa. s. Refractive index (25 ° C) L4000-1. 4100, hydroxyl content 4% -5K. hydroxyl silicone oil can be produced by ring opening polymerization of octamethylcyclotetrasiloxane catalyzed by acid or alkali, and then degradation by adding water. It can also be made from macromolecule weight polydimethylsiloxanes by K ü H catalysis and degradation with water under high pressure. It can also be formed by hydrolysis of dimethyl dialkyloxy silane under weak acid conditions or by end acylation and re hydrolysis of octamethylcyclotetrasiloxane after ring opening. hydroxyl silicone oil with molecular weight of 50000 to 60000 is the base rubber of room temperature vulcanized silicone rubber, and hydroxyl silicone oil with low viscosity is an excellent structure control agent in the processing of silicone rubber, which can replace diphenyl silicone glycol, simplify processing technology and improve process performance. hydroxyl silicone oil is also used as a waterproof, soft and anti sticking agent for fabrics, leather and paper

Classification