Application of low hydrogen silicone oi

Apr. 01, 2021

Background and overview

Hydrogen-containing silicone oil is one of the most important products in silicone oil varieties, and is the starting material for many modified silicone oils. A variety of modified silicone oils can be obtained from the active group hydrogen in the main chain of siloxane and many other active groups through the hydrosilylation reaction, such as polyether modified silicone oil, epoxy modified silicone oil, and long-chain alkane. Base silicone oil, etc. Its notable feature is that it has good waterproof effect and can be cross-linked to form a film at low temperature to form a waterproof layer on the surface of the material. It is used for waterproof treatment in textile, glass, ceramics, paper, leather, metal, building materials and other industries with very good effect.

Low-hydrogen-containing silicone oil can be prepared by the hydrolysis of halogenated silane, ring-opening copolymerization, and telomerization of high-hydrogen-containing silicone oil.

preparation

A production method of low-hydrogen silicone oil with reasonable production process and lower production cost of enterprises.

Put the distilled D4, hydrogen-containing double head, high-hydrogen silicone oil, hexamethyldisiloxane (MM) and acid cationic resin into the reactor in proportion, control the temperature at 70-100℃, stir and polymerize 1.8-2.5 After hours, the acidic cationic resin is filtered out, and then the temperature is raised to 140-150°C and the stirring is continued to maintain the vacuum at -0.08- -0.12MPa, and the low molecular weight is removed to obtain the hydrogen-containing silicone oil.

application

Low-hydrogen silicone oil can be used to prepare a hydrophilic amino silicone oil. It is characterized by including the following steps: A. Preparation of low-hydrogen silicone oil, mixing siloxane ring, high-hydrogen silicone oil, end-capping agent and acid, and reacting, then cooling down and adjusting pH to prepare low-hydrogen silicone oil B. Preparation of epoxy silicone oil, mixing the prepared low-hydrogen silicone oil with alkenyl epoxy compound and catalyst, reacting and cooling to obtain epoxy silicone oil; C. Preparation of hydrophilic amino silicone oil The obtained epoxy silicone oil, organic amine and solvent are mixed and reacted, and then the solvent is distilled off to prepare hydrophilic amino silicone oil. When the hydrophilic amino silicone oil prepared by the method of the present invention acts on fabrics, it is more firmly bonded in a chemically strong form, and is more washable. It also has the soft effect of ordinary amino silicone oil, does not turn yellow, and has good slippery and antistatic properties. , It is widely used in fabric finishing. 

It is used to prepare a domestic garbage leachate treatment system and a defoamer for desulfurization slurry foam. Using the mixture of dimethyl cyclosiloxane, high-hydrogen silicone oil and hexamethyldisiloxane as raw materials, concentrated sulfuric acid as a catalyst, the reaction produces low-hydrogen silicone oil; KOH is dissolved in glycerin to generate potassium glycerol, and glycerin Potassium and propylene oxide are used as raw materials for ring-opening polymerization, and then ethylene oxide is added for polymerization to form copolymers to obtain polyoxyalkylene ethers; low-hydrogen silicone oil and polyoxyalkylene ethers are used as raw materials for hydrosilylation The reaction produces polyether-modified polysiloxane; white carbon black and polyether-modified polysiloxane are used as raw materials to react to form a silicone paste. The auxiliary agent is added to the silicone paste and stirred to obtain the product of the present invention in emulsion form. Foaming agent. The product of the present invention has been successfully applied in some garbage leachate treatment systems, and achieves the application effects of environmental protection, harmlessness, low cost, high reliability, fast defoaming speed, lasting foam suppression, low dosage, and high defoaming efficiency.

Low-hydrogen silicone oil can be used to prepare an organic silicon antistatic agent. The present invention provides a method for preparing an organosilicon antistatic agent, which includes: adding low-hydrogen silicone oil and allyl alcohol polyoxyethylene ether to a reaction kettle equipped with a reflux device, then adding a chloroplatinic acid solution, and heating to 100-130°C, after the system is transparent and clarified, the temperature is kept and reacted for 1-3h, and the temperature is discharged; wherein, the amount of chloroplatinic acid added is 0.0005-0.0020% of the mass of the low-hydrogen silicone oil. Using low-hydrogen silicone oil as a raw material, it reacts with allyl alcohol polyoxyethylene ethers of different activities. The reaction is complete, the conversion rate is high, the product quality is stable, and there is no polymerization or cross-linking. The organosilicon antistatic agent prepared by the preparation method has good hydrophilicity and hygroscopicity, which greatly reduces the specific resistance of the fiber surface, thereby achieving an antistatic effect and meeting the requirements of an antistatic agent and washing resistance in the textile industry.


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