Part of the methyl group in methyl silicone oil is replaced by long chain alkyl group, which is called methyl long chain alkyl silicone oil. The introduction of long chain alkyl group makes the product more lubricating, defoaming and anti-sticking. The longer the alkyl chain in the molecular chain, the increase in surface tension, refractive index, and viscosity of the product, and the decrease in density. The most direct synthesis method is to use methyl hydrogen-containing silicone oil and α-olefin for hydrosilylation reaction, but this usually produces a modified silicone oil with medium and low viscosity, and the Pt complex catalyst will cause The color of the product is deepened, which greatly reduces the industrial value of the product. Zhu Huaijun and others used 1-octene, 1-dodecene, and 1-octadecene to synthesize methyl long-chain alkyl silicone oils with different viscosities without heating. The catalyst amount was only 2mg/kg, and the product obtained was colorless. The application prospect is broad. Zhang Shue et al. used α-olefin compounds to synthesize long-chain alkyl silicone oil. The platinum-catalyzed-isopropanol-acetylacetone-ethyl acetoacetate system used in the reaction made the reaction conditions more mild and shortened the reaction time. Xu Yunhuan and others first synthesized the linear dodecyl-terminated silicone oil by carrying out the hydrosilylation reaction of the terminal hydrogen-containing silicone oil and α-dodecene under the catalysis of chloroplatinic acid; The reaction is carried out under the catalysis of sulfonated cationic resin to obtain a linear dodecyl-terminated organosilicon intermediate with active hydrogen in the side chain; and then with α-C20-45 linear olefin under the catalysis of chloroplatinic acid for silicon hydrogen The addition reaction produces a long-chain alkyl silicone oil with a linear dodecyl end capped and a side chain with a C20-45 linear alkyl group. The obtained product can improve the moisturizing and air permeability of the lipstick.