The silicone oil r is CH3, OH; R ́, which is CH3, H, an […]
The silicone oil r is CH3, OH; R ́, which is CH3, H, and the like. The oil content is generally between 20% and 30%. The pH is 6-8. Centrifugal stability (3000r/min) for 15 to 30 minutes. The surface tension is small and the contact angle to water is large. Heat resistant, anti-oxidation. Prepared by emulsion polymerization of octamethylcyclotetrasiloxane in the presence of an anionic surfactant such as sodium dodecyl sulfate or a cationic surfactant such as cetyltrimethylammonium bromide and a catalyst . It is an excellent textile chemical finishing agent. It is often used as a soft and smooth finishing of fabrics, silk-like finishing, wool-like finishing, water-repellent waterproofing, etc., which can be used alone or in combination with other finishing agents. The fabrics that are finished with it can achieve a comfortable, stylized, high-grade, functional quality effect.
The silicone emulsion is mainly used as a silicone oil fabric soft finishing agent. The first generation of silicone fabric finishes was a mechanical blend of dimethicone and hydrogenated silicone oil (and its derivatives). The second generation of silicone fabric finishing agent is a hydroxyl terminated polydimethylsiloxane emulsion, which is prepared by octamethylcyclotetrasiloxane monomer, water, emulsifier, catalyst and other raw materials under certain conditions. Aggregated. Since the polymerization and the emulsification are completed in one step, the invention has the advantages of short man-hour, high work efficiency, simple equipment, convenient operation, etc., and the obtained emulsion is very stable, the particles are very uniform, and the prepared polymer has active groups at both ends (hydroxyl groups). ) It can be further reacted into a film, which is beneficial to improve the application effect of the emulsion, which is inferior to the mechanically emulsified silicone oil.