Long-chain alkyl silicone oils are flourishing in multiple fields, including high-end manufacturing and personal care, ushering in an upgrade wave.

In recent years, as the downstream industry has increasingly raised the requirements for material performance, long-chain alkyl silicone oils, with their excellent lubricity, demolding properties, hydrophobicity, and good compatibility with organic materials, are accelerating their penetration into various scenarios such as die casting, rubber and plastic processing, textile finishing, and personal care, becoming a growth pole in the specialized silicone oil sector that attracts much attention.


1. The specialized silicone oil market segment maintains steady growth
Public market research shows that the global organic silicon market has exceeded 20 billion US dollars, and the specialized silicone oil and modified siloxane sub-sectors have maintained an average annual growth rate of 5% to 7%. Traditional dimethyl silicone oil faces bottlenecks such as insufficient compatibility and easy residue in some applications. Long-chain alkyl silicone oil, as a performance upgrade direction, has continuously gained attention and the downstream customized demand has significantly increased.


2. Alkylation modification breaks through the performance bottlenecks of traditional silicone oil
Silicone oil alkylation modification involves extending the side chain carbon number from 1 carbon of a methyl group to 12 to 16 carbons. After the carbon chain lengthens, the molecular volume increases, and the chains are more prone to entangle into thicker lubricating films, significantly enhancing lubricity, hydrophobicity, and the affinity with organic substrates. Compared to dimethyl silicone oil, long-chain alkyl silicone oil performs better in lubrication and demolding of soft metals (aluminum, zinc, copper, etc.), rubber and plastic parts, and has no residue after demolding and does not affect secondary printing and painting, thus being called "dry silicone oil".


3. Application scope continuously extends from industry to daily use
In the mechanical and electrical field, long-chain alkyl silicone oil is used as an insulation medium and damping material with temperature resistance, corrosion resistance, and moisture resistance; as a defoamer, it can function when added at 10 to 100 ppm; on the surface of glass and ceramics, a semi-permanent waterproof and mold-resistant film can be formed after heat treatment. At the same time, its compatibility with high-carbon alcohols and liquid paraffin is good, and it is easier to emulsify, achieving expansion in both industrial and daily use.


4. Frequently Asked Questions by Customers
**Question: What are the advantages compared to dimethyl silicone oil? **
Answer: It has better lubricity, demolding performance and hydrophobicity. It has good compatibility with organic materials, leaves no residue after demolding, and is more conducive to subsequent printing and coating.


**Question: How is it generally prepared and used as a demolding agent? **
Answer: As an external demolding agent, it is usually emulsified or diluted to a concentration of 2.5% to 10%, and then sprayed or brushed onto the mold surface.


**Question: How to determine the dosage? **
Answer: When used as an additive, the dosage is generally between 0.2% and 5%. The exact amount should be determined based on the application scenario and process testing.