1. Siloxane ring body: ring opening polymerization of D3, D4, etc., which is terminated with water under the catalysis of acid or base.

2. Dehydration polymerization is carried out with hydroxysiloxane (commonly known as linear).
Hydroxyl silicone oil is mainly adsorbed on fabrics by hydroxyl and the anchoring effect of oxygen in the silica chain and polar groups such as hydroxyl, carboxyl and amino groups on the fabrics. Because the distribution of the extranuclear electron cloud of oxygen in the silica chain is relatively uniform, its polarity is much weaker than that of hydroxyl, so as long as the hydroxy silicone oil still depends on the adsorption of silica hydroxyl in its job, it can fill the defects on the fabric surface when it is adsorbed on the fabric, At the same time, the methyl side outward gives the fabric a smooth feel. However, due to the poor adsorption of hydroxy silicone oil, the siloxane chain forging is prone to migration, and the crosslinking degree with the fabric is low when curing and forming the film, and the flexibility is also poor. In order to provide a better smooth feel and flexibility, the molecular weight of hydroxy silicone oil needs to be increased to form more continuous silicone film structure between the siloxane chain forging and chain forging through the ultra-high molecular weight, At the same time, high molecular weight can also reduce the migration phenomenon, so as to improve the smooth feel and washability of hydroxysilicone oil.