Rosin thermal polymer of cement foaming agent

Rosin thermal polymer is the earliest foaming agent in the world, first created by the United States in 1937 and called "Vinso" resin. It was patented in 1938. It is the ancestor of foaming agents. Wen Sha resin was originally a by-product obtained by refining the extract containing wood rosin from the roots of pine trees. Its properties are very similar to rosin soap. Its initial application was to improve the water retention of concrete, the impermeability of hydraulic engineering, and the frost resistance of pavement and dam construction in cold regions by generating tiny bubbles (called microbubbles). In the 1940s, Japan introduced the "Wensha" technology from the United States, produced by Yamatsu Chemical Co., Ltd., and used it in large-scale hydraulic engineering projects such as the famous Aoguoji Dam and Tianzicang Dam in Japan. Afterward, countries worldwide also introduced or imitated the production technology of "Wensha," making rosin thermoplastic widely used worldwide and extending its use from an air-entraining agent to a foaming agent, making it more widely used. In the 1950s, China began to imitate the American "Wensha" resin to produce rosin homopolymers as air-entraining agents for concrete, mortar, and foam concrete. It is China's primary type of air-entraining agent and foaming surfactant in the second half of the last century. Technical principle: Rosin, phenol, sulfuric acid, and other substances are used as raw materials, mixed in an appropriate proportion, and put into a reaction kettle. After reacting at 70-80 ℃ for 6 hours, a sodium salt condensation hot polymer product is obtained, which can be used as a brown paste as a rosin hot polymer type air entraining agent. However, this reaction process is quite complex, as carboxylic acids in rosin undergo a condensation reaction with hydroxyl groups of phenols to form lipids. The formed macromolecules react with alkali to form sodium salts of condensed polymers, and their products also belong to the category of anionic surfactants. If you are looking for high quality, high purity and cost-effective cement foaming agent, or if you require the latest price of cement foaming agent, please feel free to email contact mis-asia.