Shanghai Daoqin Plastics Co., Ltd.

         due to polyurethane ester for metal and other material property relatively strong/high, production polyurethane ester products generally use demolding agent, RIM process 也不例 outer. RIM process demolding agent has outer demolding agent and inner demolding agent type.

         currently commonly used outer demolding agent is wax and has machine silicon demolding agent. can formed solvent liquid, 便于经济 coating mold. can use polyethylene wax 2%一10%烃 type solvent liquid as automotive 保险杠 and other RIM polyurethane ester material outer demolding agent. if made parts has coating requirements. use has machine silicon demolding agent, can 引起不 can overall coating.

         is improve/increase production efficiency requirements, inner demolding agent as is RIM polyurethane ester (脲) important additives by development. inner demolding agent is add to formulation in demolding function additives, in polyurethane ester molding process can separation to products surface 而起隔离 function.

         most development inner demolding agent has active property has machine poly silicon oxygen combined material, already in world scope/range use. in is acid polyester long 链段, is polyether, amine polyether polymer/macromolecule combined material, high grade alcohol or amine and oxidation ethylene add formed material (non type surface active property agent) and other is commonly used inner demolding agent. hard acid zinc belongs to non reaction property inner demolding agent.