摘要:
The present invention pertains to isocyanate-terminated prepolymers prepared from cyclic alkylene carbonates, the method for preparing the same and the use thereof in preparing polyurethanes, polyureas, polyurethane elastomer, and polyurethane mouldings. The incorporation of cyclic alkylene carbonates into the isocyanate-terminated prepolymers of the present invention improves their liquid stability at low temperatures while maintaining their physical properties.
摘要:
A composition for making a polyurethane foam includes a fugitive tertiary amine urethane catalyst and amidoamine and/or imidazoline property enhancing additives. The inclusion of one or more of these property enhancing additives serves to reduce or eliminate physical property and surface deterioration of polyurethane foams made at reduced density.
摘要:
The present invention pertains to a shoe upper, the method for preparing the same and the use thereof. This invention provides a method for preparing shoe upper by spraying polyurethane reaction system, avoids the complicated steps of cutting, shaping, stitching and bonding, simplify the production process, reduces the equipment requirements, saves cost and improves the production efficiency.
摘要:
The present invention relates to a process for preparing plastics with improved hydrolysis stability, comprising a step of adding 0.05-5 wt. % perchlorate salt which is based on 100 wt. % of the plastics, as a raw material to prepare the plastics. The present invention also relates to the plastics prepared from the process and use thereof.
摘要:
The present invention relates to polyurethane, and specifically relates to a polyurethane microcellular elastomer, a method for preparing the same, and the use thereof. The polyurethane microcellular elastomer is the reaction product of (1) an isocyanate-terminated prepolymer obtained by reacting an isocyanate with a first polyol, (2) a second polyol, (3) a chain extender and (4) a catalyst, wherein the first polyol and/or second polyol comprise at least one polycarbonate polyol obtained by reacting carbon dioxide with an alkene oxide. This method of preparing polyurethane microcellular elastomer can not only reduce the demand for raw materials derived from petrochemicals, but also realize the utilization of the “greenhouse gas” carbon dioxide.