Preparation of Polyether Modified Silicone Oil
Polyether-modified silicone oils with different properties and applications can be prepared with different raw materials and process conditions. By precisely controlling the reaction conditions and the ratio of raw materials, products meeting specific needs can be obtained.
1、Preparation of wood-like polyurethane foam stabilizer side-chain type polyether modified silicone oils
The raw materials for this method include octamethylcyclotetrasiloxane, hexamethyldisiloxane and high hydrogen-containing silicone oil. The low hydrogen-containing silicone oil is first obtained by synthesizing these raw materials, and then the low hydrogen-containing silicone oil is synthesized with allyl polyether by silica-hydrogen addition reaction to obtain the polyether-modified silicone oil.
The advantage of this method lies in its high controllability and strong reactivity, and it can prepare polyether modified silicone oil with regular structure, which is especially suitable for the field of polyurethane foam, and favored because of its excellent performance suitability.
2、Preparation method of polyether modified silicone oil for producing fabric softener
In this method, polyether, hydrogen-containing silicone oil and ionic liquid catalyst are firstly added to the reaction kettle in a certain proportion and mixed under nitrogen environment. The reaction conditions are pressure 50-200 Pa, temperature 80-90°C and reaction time 3-5 hours. The polyether modified silicone oil product was obtained through separation and purification steps.
This prepared modified silicone oil has few impurities, light color, good softness and superior high temperature resistance, effectively solving the shortcomings of the existing technology.
3, a polyether modified silicone oil preparation method
This method utilizes a porous ceramic-loaded platinum catalyst to carry out a silicohydrogen addition reaction between a polyether with an alkenyl group at the end and a hydrogen-containing silicone oil in a solvent. After the reaction, the filtrate is collected by filtration and the solvent is removed from the filtrate to obtain the polyether-modified silicone oil.
4. Method of preparing polyether modified silicone oil by fatty acid and allyl alcohol epoxy group capped polyether
This method first reacts fatty acids with allyl alcohol epoxy terminated polyether at 120-150°C for 2-5 hours. Upon completion of the reaction, the temperature is adjusted to 90-130 °C and a catalyst is added under condensation reflux conditions, followed by dropwise addition of hydrogen-containing silicone oil, and the reaction continues for 3-12 hours. The solvent is removed by a condensation recovery unit to obtain a polyether-modified silicone oil.
This method can effectively control the hydrophilic and lipophilic balance of polyether modified silicone oil by adjusting the proportional content of lipophilic groups, which is especially suitable for coatings and other formulation systems to promote wetting and dispersion between lipophilic and hydrophilic substances.
1、Agrochemical additives
In pesticides, fertilizers and other agrochemicals, polyether modified silicone oil can be used as a wetting agent and dispersant to improve the utilization rate and effect of active ingredients.
2、Coating additives
In the coating industry, polyether modified silicone oil can improve the fluidity, adhesion and durability of coatings, while controlling the generation of foam to ensure the quality of coatings.
3、Anti-foam additive
In various industrial processes, such as chemical industry, papermaking, water treatment, etc., polyether modified silicone oil can effectively control and eliminate foam as an antifoam additive to maintain the stability of the production process.
4、Synthetic leather additives
In the production process of synthetic leather, polyether modified silicone oil can improve the softness and touch of the material, while providing good lubrication and anti-adhesive properties.
5、Daily life products
In shampoo, shower gel and other daily chemicals, polyether modified silicone oil can provide silky touch and excellent hair care effect, while controlling foam.
6、Textile auxiliaries
Polyether modified silicone oils are used as softeners and lubricants in the textile industry, which can improve the feel and durability of textiles, while reducing friction damage during processing.
Translated with DeepL.com (free version)
