According to the connection method between the polyether chain segment and the siloxane chain segment, it is divided into: Si-O-C type and Si-C type. Si-O-C type polyether modified polysiloxane is mostly obtained by the condensation of alkoxy silicone oil and hydrocarbon-terminated polyether. It is prone to hydrolysis and bond breaking when exposed to acids and alkalis, and the siloxane phase precipitates. It is a hydrolyzable type. Mainly used as degradable surfactant. Si-C type is mostly obtained by hydrosilation reaction of oxygenated silicone oil and allyl polyether. It has good chemical stability, is not easy to hydrolyze, has good stability, and can be stored for a long time when isolated from air. It is called non-hydrolyzable type.
CHUNG et al. prepared twelve grafted silicone surfactants through hydrosilylation, and studied the effect of the size of Si-O-Si chain links on their surface properties, and found that Si-O-Si chain links The size has the greatest impact on the surface tension of grafted silicone surfactants.
This type of product has good compatibility with ethanol, stearyl alcohol and fatty acids. Its foaming properties are comparable to other non-ionic surfactants. It is also compatible with sodium lauryl sulfate (K12), fatty alcohol polyoxyethylene Anionic surfactants such as sodium ether sulfate (AES) have a compound coordination effect and can reduce their irritation to skin and eyes. When used in shampoo, it not only does not affect the foam properties of the shampoo, but can even increase and improve the stability of the foam. It can significantly improve the dry and wet combability of hair after shampooing, and reduces fly-away hair due to its antistatic properties. Silicone polyether copolymers with long-chain alkyl groups are very effective W/O emulsifiers not only for silicone liquids, but also for mineral oils or vegetable oils containing high protein. Stable pastes can also be produced under high temperature or freezing conditions. If it has a suitable HLB value, it can be used as an effective W/O emulsifier combined with cyclosiloxane to prepare antiperspirant and deodorant.
