lotion type silicone resin-Pure silicone resin lotion
Apr 10, 2023
Pure organic silicone resin lotion, namely lotion type silicone resin (silicone resin lotion), has been widely used as building paint and adhesive, which has no pollution to the environment, no toxicity to human body, low production cost and good development momentum. The main preparation methods are as follows.
(1) Generally, the silicone resin emulsification method is to make silicone resin prepolymer by co hydrolysis and condensation of mixed silica burning monomer, and then emulsified into silicone resin lotion under the joint action of emulsifier and water.
(2) Silicone monomer co hydrolysis emulsification
The specific preparation method is as follows: 33.6 mass parts of MeSi (OMe), 3122 mass parts of Ph C OMe h, 44 5 parts of M-core, i (OMe) 3, 120 parts of 50% CsH11MeNC3, SiCOMe is methanol solution, 5 parts of NG is NHC3, Si is pressed (OM core is loaded into the reactor, 90 parts of water is slowly added under stirring for hydrolysis reaction, and refluxed at 90 ° C for 2h, then MeOH is evaporated, 75 parts of butyl cellulose is mixed to obtain a mixture containing 55% (mass fraction) of solids, and then diluted with 20 times of volume of water to obtain silicone resin lotion, Stable for over 1 month at 40 ° C, the product is suitable for use as a high-temperature resistant coating. For example, 60 parts of silicone lotion by mass (calculated by solid content), 25 parts of ceramic powder, 20 parts of talc powder, 5 parts of mica powder and 10 parts of glass frit are added and processed in a grinder. The resulting coating is sprayed on the steel plate (25~30 µ m thick) and dried at 180 ° C for 30min. The coating can withstand more than 2000h at 500℃.
(3) Equilibrium between silicone resin prepolymer and (Me2SiO) 4
For exterior wall coatings, their ability to resist external factors such as water, environment, and climate is quite important. The paint system should have good water vapor permeability and low liquid water absorption rate to ensure that the exterior wall remains dry. At the same time, it should also have long-term weather resistance and good stain resistance. Therefore, organosilicon lotion with excellent hydrophobic function has become a better choice for manufacturing high-performance exterior wall coatings. Silicone resin has a network chemical structure similar to quartz, which is different from ordinary latex paint by forming a continuous and dense film to prevent the absorption of liquid water. Instead, it achieves protection by endowing the porous substrate with hydrophobicity and enhancing the substrate. Therefore, the coating film has good respiratory function and better weather resistance.
Silibase Silicone Resin is mainly used to prepare silicone insulating paint, silicone coating, silicone adhesive and silicone plastic. High performance coatings such as high-grade building exterior wall coatings are the main market of silicone resin, and the main varieties are modified polyester and modified acrylic resin.
We mian products are Silicone Resin Adhesive,Silicone Resin of mica plate,Silicone Resin Emulsion,Silicone Resin Intermediate,Silicone Resin for Coating,Silicone Resin Paint.
