专利号:US-4287307-A 优先权日:1980-03-05 标 题:Integral skin microcellular polyester base polyurethane elastomers 发明人:HOSTETTLER FRITZ 权利人:PLASTICS TECH ASS 摘要:Synthesis of integral skin microcellular polyurethane elatomers by reacting hydroxyl-terminated aliphatic polyesters with symmetrical diisocyanates, prepolymers of these isocyanates such as derived from p,p'-diphenylmethane diisocyanate and an aliphatic glycol and mixtures thereof, these are polymerized in the presence of an organic blowing agent, and one or more plasticizers such as of the formulae further enhancement of the results is brought about by the presence of catalysts and cell regulating agents, such as dimethylpolysiloxanes; the obtained elastomers are useful, such as for shoe soles and in the manufacture of other products, e.g., vibration dampening devices, floatation devices, gaskets and the like.
专利号:CN-116041657-A 优先权日:2023-02-08 标题:Synthesis method of internal crosslinking type cationic aqueous polyurethane emulsion