Unmodified silicone oil refers to dimethyl silicone oil. Because of its flexible Si-O-Si main chain and methyl side chain, it has the characteristics of low surface tension and compliance, and is widely used in daily chemical, textile, machinery, petrochemical and other industries. However, with the development of science and technology, the application of dimethyl silicone oil in some industries is gradually limited, coupled with the problem of excess capacity, it is urgent to increase the r&d input and output of high-performance products to meet the development needs of downstream applications.
Alkylation modification of silicone oil refers to the increase of side chain length from 1 carbon of methyl to 12-16 carbon, the increase of carbon chain length, its physical properties also change, so as to give alkylation silicone oil better compatibility, lubricity and hydrophobicity, so it has better application performance than dimethyl silicone oil in many industries.

01 Lubricating Oil Picture
With the increase of carbon chain length, the molecular volume of alkyl silicone oil increases, and the molecular chain is easy to entangle and form a thick lubricating film to improve lubricity. In addition, alkyl silicone oil can also be used for soft metals (such as aluminum, zinc, steel, etc.) and rubber, plastic (especially steel, aluminum, etc.) lubrication.

02 Picture of defoamer
When dimethyl silicone oil used in paint ink defoaming, due to its incompatibility, easy to produce shrinkage cavity and silicon spot phenomenon. Due to the good affinity of long chain alkyl silicone oil to organic materials, the defoamer prepared by it can avoid this problem. In addition, in order to reduce rinsing times and save water resources, laundry powder no longer excessively pursues high foam volume. Solid defoamer with cetyl silicone oil as active agent can significantly reduce foaming performance of laundry powder products, and its market prospect is broad.

03 Picture of release agent
When dimethyl silicone oil is used as a demoulding agent, it is easy to remain after demoulding and affect the secondary printing, while alkyl silicone oil has no residue after use and does not affect the printing paint of the product, so it is also known as "dry silicone oil" by industry insiders. The high temperature resistance of silicone oil can be improved by double modification of alkyl and phenyl groups, and the alkylaryl silicone oil obtained has a good application in aluminum alloy die casting demoulding industry.

04 Personal care pictures
Compared with dimethyl silicone oil, alkyl silicone oil is soluble in high carbon alcohols and liquid paraffins, and is easier to emulsify. When used in cosmetics, it not only maintains the safety and smooth touch of organic polysiloxane, but also improves the affinity with skin with the grafted alkyl long chain, making cosmetics better spread.

The alkylation modification of silicone oil is mainly based on silicon-hydrogen addition reaction, which is mostly obtained by the addition of α -olefin and hydrogen-containing silicone oil. The raw materials of this reaction are relatively easy to source, and the experimental conditions are mild. It is the main plan of industrial alkylation modification of silicone oil.