In the production of coatings, silicone resins are often used. Many people don't understand the related production methods. How do silicone resins make coatings? Next, silicone resins will introduce the methods of making coatings with silicone resins. Follow this article to learn about them.
Use a suitable solvent to prepare the silicone resin into a solution, and then add a little silane coupling agent and catalyst. You need to ask a professional technician to study the specific formula.
Resins are relatively low molar mass polymers with a three-dimensional structure. They have many uses and they are used in the field of self-adhesives (peeling force modifiers), as defoamers, release additives, paint additives and in many other fields, reaching numerous fields of activity. Silicone resins are known and they are commercially available and used to make silicone-based products such as adhesives and defoaming products. The term "MQ resin" is sometimes used to refer to such resins because there are monovalent siloxy units (M) and tetravalent units (Q). They have extremely diverse structures depending on the amount of trifunctional units T or tetrafunctional units Q incorporated into the polymer during production. It is to be recalled that in silicone chemical terminology, the siloxane units M, D, T, and Q are defined as follows: IIRROOR—Si—〇— 一 —o—Si—0—0—Si—0 —.— 0—Si The main chain of the —O—RiR0_IMDTQMQ resin is generated by the polycondensation of the liquid silicate as a source of Q units, and then a monofunctional chlorosilane as a source of M units is grafted thereto by hydrolysis of a silanol functional group that does not undergo condensation polymerization.
Silicone resin (commonly known as silicone glass resin) made from methyltrialkoxysilane can be used to treat paper, Plastic, and metal surfaces to make them have good brightness and abrasion resistance. The silicone resin can be used as an outdoor coating with good weather resistance after being modified (such as with alkyd resin).
The industrial production of silicone resins usually uses methyltrichlorosilane and phenyltrichlorosilane as the main raw materials. In order to reduce the brittleness and hardness of the resin and improve the adhesion of the resin, difunctional monomers such as dimethyldichlorosilane and methylphenyldichlorosilane can be added.
The above monomers are hydrolyzed and polycondensed in a solvent, and the by-produced hydrogen chloride is washed away to obtain a resin liquid which still contains a small amount of silyl hydroxyl groups. When used, a small amount of catalyst such as cobalt naphthenate is added to complete the polycondensation of the resin to obtain a cross-linked three-dimensional network-shaped cured resin. The feed rate, reaction temperature, and stirring intensity during the hydrolysis process all have an effect on the resin performance.
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