Propylene glycol: is normally provided by an unsaturated dibasic acid or saturated dibasic acid diol unsaturated diol linear polycondensation polymer compound having an ester bond and an unsaturated double bond. Typically, the polyester of the polycondensation reaction is carried out at 190 ~ 220 ℃, until the desired acid value (or viscosity), at the end of the polyester condensation reaction, a certain amount of hot vinyl monomer, dubbed viscous liquid, such as a polymer solution called unsaturated polyester resins. Propylene glycol: various uncured unsaturated polyester is from low to high viscosity liquids, by curing with heating after adding various additives glycol manufacturers, Serve after curing a rigid or flexible plastic, can be transparent or opaque. Unsaturated polyester main purpose is made of glass fiber reinforced fiberglass, plastic is reinforced one of the main varieties. It's shaping methods are: ① hand lay method, is painted in a good mold release agent to spray a layer of resin glycol industrial rubber, holes and a layer of reinforcing material, crowding out the bubbles and then repeat the operation to a desired thickness, and finally solidification. ② lamination method is to pour a glass cloth impregnated with unsaturated polyester after curing is made by laminating hot. It has excellent tensile strength and impact toughness, good small relative density of propylene glycol antifreeze, thermal and electrical insulation properties, and good light, weather, acid and sound insulation properties, the price is much cheaper off than epoxy fiberglass , it is widely used in the manufacture radomes, aircraft parts propylene glycol, car shell, small boats, transparent corrugated board and other building materials, sanitary ware and chemical toilet facilities and pipelines. Propylene glycol industrial rubber, propylene glycol, Wei Wei Connaught Chemical provided by Qingdao Sino Chemical Co. Qingdao Wei Connaught Chemical Co. (www.qdweinuo.com) strong, credible, in Qingdao, Shandong and other chemical products industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Wei Connaught Chemical and you hand into the brilliant, for a better future!