1. Cationic hydroxy silicone oil emulsion The emulsifie […]
1. Cationic hydroxy silicone oil emulsion
The emulsifiers used in the polymerization of cation-type hydroxy emulsions are generally quaternary ammonium salts (octadecyltrimethylammonium chloride reported in foreign literature), and the catalyst is ammonium hydroxide. Cationic hydroxy emulsion can be used for finishing of various textiles, with improved fabric feel, improved fabric elasticity and smooth and crisp performance. Another unique advantage is that the ideal waterproofing agent for fabrics can be used together with methyl hydrogen silicone oil emulsion. , waterproof performance and waterproof durability can reach a very high level, can be used as waterproofing agent for vinylon canopy canvas, waterproofing agent for polyester card.
2, anionic hydroxy silicone oil emulsion
The anionic hydroxy emulsion is characterized by good compatibility in the fabric finishing agent and the emulsion is very stable. In particular, most of the additives in textile printing and dyeing are anionic. If cationic hydroxy milk is used, it is easy to cause demulsification and bleaching oil, and anionic hydroxy milk can avoid this drawback, so it is more popular with users and has a wide range of uses.
3. Composite ionic hydroxy silicone oil emulsion
Although cationic hydroxy emulsion is an excellent fabric soft finishing agent, this emulsion is not resistant to hard water and cannot be bathed with dimethylol dihydroxyethylene urea resin (2D) resin, catalyst magnesium chloride and anionic brightener. Use, so there are certain limitations in use. In addition, due to the poor stability of the emulsion, the silicone polymer is easily separated from the emulsion and floated on the liquid surface, commonly known as "bleaching oil". If the cationic and nonionic emulsifiers are used in the emulsion polymerization process, the disadvantages of preparing the hydroxy silicone oil emulsion by the cationic emulsifier can be overcome, and the prepared silicone emulsion can withstand hard water, can be combined with 2D resin, magnesium chloride and The brightener VBL is used in the same bath and has good heat resistance and freeze resistance.
4, non-ionic hydroxy silicone oil emulsion
Non-ionic hydroxy milk is more adaptable and stable than hydroxy-type milk, so many countries have been studying non-ionic hydroxy milk. For example, the new product UltrateXFSA produced by Ciba Cargill is a non-ionic emulsion of hydroxyl-terminated polydimethylsiloxane with a molecular weight of more than 200,000, which is higher than the Dc-1111 anionic hydroxy emulsion of Dow Corning. Take a step forward.
5. Other reactive groups of silicone finishing agents
In order to meet the needs of advanced finishing of various fabrics, improve the anti-oil, anti-static and hydrophilic properties of silicone finishing fabrics, and make chemical fiber fabrics have many advantages of natural fabrics, silicone workers have studied the introduction of other silicone molecules. A reactive group such as an amino group, an amide group, an ester group, a cyano group, a carboxyl group, an epoxy group or the like. The introduction of these groups has a special effect on the silicone fabric finishing agent, for example, the introduction of the silicone molecule into the amino group is suitable for the shrink-proof and soft finishing of the wool fabric; the introduction of the amide group is suitable for the anti-fouling finishing, and the softness is also greatly improved: introduction The cyano group has good oil resistance, and the anti-static effect of the copolymer of polyoxyethylene ether and silicone is good; the organic fluorine-modified silicone has many advantages such as oil repellency, antifouling, antistatic, water repellency and the like.