Polycarbonate bisphenol A, BPA Bisphenol A net 88 procurement Yellow Pages sales

Bisphenol A Bisphenol A is an important organic chemical raw materials, phenol and acetone important derivatives, mainly used for the production of a variety of polymer materials, polycarbonate, epoxy resins, polysulfone resins, polyphenylene ether resin. Can also be used in plasticizers, flame retardants, antioxidants, heat stabilizers, rubber antioxidant, pesticides, paint and other chemical products. Many types of epoxy resins, for clarification reasons, often in front of the name of the epoxy resin plus different monomers. As diphenylolpropane (referred to as bisphenol A) epoxy resin (obtained from bisphenol A and epichlorohydrin system); glycerine epoxy resin (obtained from glycerol and epichlorohydrin); epoxy butene ( polybutylene oxide derived); cyclopentadiene epoxy resin (manufactured by epoxidation of dicyclopentadiene obtained). Furthermore, for the same type of epoxy resin, also depending on their viscosity and epoxy value of which is divided into different grades, their properties and uses are also different. The most widely used is that some brands of bisphenol A type epoxy resin, commonly referred to as bisphenol A type epoxy resin refers to an epoxy resin. Epoxy largest and most widely used of a variety yield, because it has a high degree of transparency, but also from bisphenol A and epichlorohydrin in the presence of sodium hydroxide produced by the reaction: in that: n general between 0 and 25. Depending on the relative molecular mass size, epoxy resin can be divided into various models. Usually low molecular weight epoxy resin n average is less than 2, the softening point of less than 50 ℃, has become soft epoxy; n value relative molecular mass of epoxy resin medium between 2 to 5 and a softening point of 50 ~ 95 ℃ between; and n is greater than 5 resin (softening point above 100 ℃) called high molecular weight resin. Use of bisphenol A type epoxy resin commonly used in the field of corrosion in several forms: ◆ epoxy coating ◆ ◆ epoxy fiberglass epoxy clay, epoxy mortar ◆ ◆ whole floor epoxy - phenolic ring Oxygen - furan resin composite FRP bisphenol A type epoxy resin of bisphenol A type epoxy resin curing principle edit 2 hydroxyl (> CH-OH) in the epoxy resin structure, an ether group (-O-) and very lively The presence of epoxy, hydroxyl and ether groups are highly polar, the epoxy molecules generated interface between adjacent strong intermolecular forces, whereas the epoxy groups and the media surface (especially metal surface) free bonds react to form a bond. Thus, the epoxy resin has a high adhesive strength, is widely used, commercially known as the "all-purpose adhesive." In addition, the epoxy coating can be done, casting, dipping and mold and other purposes. However, before the uncured epoxy resin is in the form of a thermoplastic linear structure, it must be added to the curing agent used, and the epoxy resin curing agent reactive epoxy group into the macromolecular network structure, and do not become insoluble melt thermoset products. Epoxy resin before curing is not high relative molecular mass, only by curing to form a polymer body. To aid curing epoxy curing agents, many types of curing agents, mainly polyamines and polyacids, their molecules contain live wave hydrogen atom, which is the most used liquid polyamines, such as diethylene trimethyl amine and triethylamine. When the epoxy resin curing at room temperature, often needs some promoters (e.g. polythiol), in order to achieve rapid curing effect. Select the temperature curing epoxy curing agent is related generally with a polyamine curing and multi thiamine and other at normal temperature, but at a higher temperature curing and polyacid anhydride is generally used as a curing agent. Different curing agents, crosslinking reaction is different. Shanghai Lin Yan Ltd. was established in 2009, is engaged in chemical raw materials import and export trade and sales of businesses. Companies adhering to the "customer first, forge ahead" business philosophy, the "customers first" principle to provide our clients with quality services. We mainly engaged in "Russian black N990; bisphenol A; polycarbonate; MMA" and other products. Company respected "pragmatic, hard work and entrepreneurial spirit of responsibility and integrity, win-win situation, and create a business philosophy, to create a good business environment, with a new management, improve technology and good service, excellent quality for basic survival, We always adhere to customer first intentions of services to customers, we persist in using their services to impress customers.