Flammability and shrinkage of unsaturated polyester
The fire resistance of unsaturated polyester is due to the use of fiberglass mostly as building materials, furniture and transportation equipment.Therefore, the use of refractory polyester resin requirements.
Flame retardant polyester resins can be divided into three categories, and additive, reactive and expansive fire retardant coating.
The specific methods are :
(1) using halogen elements as one of the components;
(2) halogen elements are combined with nitrogen elements such as phosphorus and antimony to enhance the flame resistance of unsaturated polyester resin;
(3) use water-containing polyester resin to enhance the flammability of polyester resin;
(4) add phosphating compounds to enhance the flammability of polyester resin;
(5) use inorganic fillers, especially water containing alumina.
Unsaturated polyester resin flame retardant can be alone or with the dilution of the active monomer, room temperature changes, unsaturated polyester resin flame retardant is also a change in the stems.
Non-flammable polyester resin has been put into industrial production in Europe, America and Japan, accounting for about 50% of the output of polyester resin.There is no problem of folding polyester resin in China's industrial production process.
The shrinkage rate of unsaturated polyester resin reached 7~8% after curing, which directly affected the product quality and appearance.In this way, the quality and appearance of polyester resin can not meet our requirements.The main way to produce low shrinkage polyester resin is to add thermoplastic polymer such as polyethylene, polyvinyl chloride, polystyrene, polymethacrylate, DAP polyester, etc.
QuanZhou Neweco High Polymer Material Co.,Ltd.
Neweco is one of the leading unsaturated polyester resin manufacturers and suppliers,widely used in automobiles, ships, rail transit, wind power generation, pipe cans, heat and corrosion protection, building materials, stone repair, sanitary ware, artificial stone and other industries. Suitable for hand lay-up, spray, pultrusion, winding, molding, vacuum introduction / RTM, casting and other molding processes. Neweco Resin is committed to excellence and focuses on the application of composite materials to provide customers with comprehensive solutions.