A polymeric material having repellent properties to adh […]
A polymeric material having repellent properties to adhesives for the production of silicon release paper and film release coatings. Silicones can also be used as ink additives to help the ink flow and improve the scratch resistance of the ink. Silicone can also be used in some pressure sensitive adhesives to withstand extreme temperatures. It can also be used as a lubricant in self-adhesive formulations to improve the paper cutting performance of the paper cutter and can be applied to both sides of the cutter blade. To prevent the accumulation of adhesives. As a new type of material, silicone material has excellent performances such as high temperature resistance, weather resistance, ageing resistance, electrical insulation, ozone resistance, water repellency, flame retardancy and bio-inertness.
It has been widely used in aerospace, electrical and electronic, construction, Environment, energy and biomedical areas. So far, organosilicon synthesis methods mainly include direct synthesis, hydrosilylation, hydrolysis and condensation, and organometallic methods. Although these methods are mature and widely used, some methods have some obvious shortcomings. For example, the hydrosilylation method usually requires a noble metal platinum catalyst, the cost is high, the reaction process requires inert gas protection, the reaction time is long, the product selectivity is relatively poor, and the residual effect of the platinum catalyst in the product affects the application in biomedicine and the like.
Moreover, with the expansion of the application range of silicone materials, traditional synthetic methods have been difficult to meet many new requirements for the structure and performance of materials. Therefore, in recent years researchers have been working on developing new methods for preparing silicone materials. Thanks to the rapid development of methodologies in organic chemistry and polymer chemistry, some new and highly efficient synthesis methods have been used for organosilicon synthesis. Treatment of fibers or fabrics with PDMS imparts excellent softness and smoothness to the fabric.
The methyl group in the methyl silicone oil is oriented on the surface of the fiber or the fabric, and a large space between the methyl groups enables the group connected to each silicon atom to freely rotate 360° around the silicon oxygen chain, and the methyl group on the silicon atom is wound around. The silicon atom connected to it rotates, almost covering the silicon oxide chain, and the non-polar methyl group lowers the molecular attraction between the chains, making the methylsiloxane molecule snailRotating or coil-shaped structure, the finished fabric is soft. Softness and reduced friction coefficient of textiles are two concepts, but they are closely related. A soft hand can be obtained by reducing the coefficient of friction between the fibers. At the same time, the softener distributes on the surface of the fiber to lubricate, reducing the dynamic and static friction coefficient between the fiber and the fabric, and the fabric or fiber produces a smooth and soft hand.