Amino modification
Amino-modified silicone oil is a polydimethylsiloxane containing amino groups in the side chain or end group, also known as amino silicone oil. This type of silicone oil is an essential ingredient for textile softeners. Because of its good adsorption and compatibility, when amino silicone oil is emulsified into microemulsion by appropriate surfactant, it can increase the softness of fiber material when used in fabric finishing, so it is used as a fabric softening and finishing agent, suitable for The post-finishing of various textiles, amino silicone oil can also be used in cosmetic additives, coating additives, resin modifiers and brighteners and other fields.
Epoxy group modification
A type of silicone oil containing an epoxy group in the side chain or end group of polydimethylsiloxane is called an epoxy group-modified silicone oil. The use of this type of modified silicone oil can improve the elasticity of the fabric. If this type of silicone oil is used in combination with the polyether modified silicone oil, the finished fabric will have better softness, wrinkle resistance, wash resistance and other properties. It is formulated with amino modified silicone oil Use, can make the fabric have a better feel.
Polyether modification
Polydimethylsiloxane containing polyether group (polyoxyethylene, polyoxypropylene, fatty alcohol polyoxyethylene polyoxypropylene ether group) in side chain or end group is called polyether modified silicone oil. It can improve the hygroscopic properties of fabric finishing. Since the polyether group is hydrophilic, the hydrophilicity of polyether silicone oil increases, and the molecule has both hydrophobic groups and hydrophilic groups, so that this kind of silicone oil shows good water solubility, and it is not easy to use during use. There will be problems such as demulsification and oil leakage. Secondly, the introduction of polyether groups also increases the hygroscopicity, antistatic properties and easy decontamination of the finished fibers or fabrics, so polyether silicone oil is used more in clothing softeners, cosmetics, and shampoo products. Another main use of polyether silicone oil is as a surfactant as a stabilizer for polyurethane foam, also known as a foam stabilizer, to adjust the bubble drop of polyurethane foam. Polyether silicone oil is a kind of active silicone softener with the largest dosage and the best effect before the development of amino silicone oil softener.
Carboxyl modification
Polydimethylsiloxanes containing carboxyl groups in side chains or end groups are called carboxyl-modified silicone oils. Such modified silicone oils can be used in fiber treatments, automotive polishes, paint additives, and the like. The combination of carboxyl modified silicone oil and amino silicone oil can increase durability when used for fiber treatment, and it is not easy to fall off during washing.
Alcohol hydroxyl modification
The polydimethylsiloxane terminated with alcoholic hydroxyl groups or containing alcoholic hydroxyl groups in the main chain is called alcoholic hydroxyl modified silicone oil. Due to the reactivity of the light groups at the end of the molecular main chain or between the molecular chains, it can be cross-linked when heated. This kind of silicone oil can be used as a structure control agent in the processing of silicone rubber, and can also be used for anti-bright treatment such as paper. Replacing a part of ethylene glycol with alcohol hydroxyl modified silicone oil for copolymerization can improve the resilience, softness, tear strength, abrasion resistance, heat resistance and other properties of polyester fibers and films, and can also improve polyurethane formability.
Phenolic hydroxyl modification
Polydimethylsiloxane terminated by phenolic hydroxyl group or containing phenolic hydroxyl group in the main chain belongs to phenolic group-modified silicone oil. The phenolic group in the molecule of this kind of modified silicone oil has high reactivity and heat resistance, so its emulsion has good stability and wide usability. If amino-modified silicone oil is mixed with phenol-based modified silicone oil, it can be compounded into an oil for synthetic fibers with very good heat resistance and mold release.
Sulfuryl modification
Polydimethylsiloxane containing sulfhydryl groups in side chains or end groups is called sulfhydryl-modified silicone oil, and the sulfhydryl groups in its molecules can interact with silicones containing unsaturated bonds under the action of ultraviolet rays and photopolymerization initiators. The compound undergoes a free radical addition reaction. This type of silicone oil is the main component of ultraviolet and electron beam curing silicone resin rubber, which is widely used in anti-sticking and barrier coatings, and can also be used as a mold release agent.
other modifications
In addition to the above modified silicone oils, there are many other types of silicone oils, such as polydiorganosiloxane-polyether block copolymerization modified silicone oil, alkyl and polyether co-modified silicone oil, alkyl ether polyether silicone oil, cyclic Oxypolyether silicone oil, amino polyether block silicone oil, glyceryl ether-based silicone oil, phosphate acyl silicone oil, sugar-based polyether silicone oil, beta-based silicone oil, etc. These silicone oils have different functional groups and therefore have special properties, but due to less demand, the market share is small.
