Dual catalyst system for high primary hydroxyl polyols

    公开(公告)号:US09896542B2

    公开(公告)日:2018-02-20

    申请号:US15504368

    申请日:2015-10-19

    Abstract: A method of producing a high primary hydroxyl group content and a high number average molecular weight polyol includes preparing a mixture that includes a double metal cyanide catalyst and a low molecular weight polyether polyol having a number average molecular weight of less than 1,000 g/mol, the polyether polyol is derived from propylene oxide, ethylene oxide, or butylene oxide, setting the mixture to having a first temperature, adding at least one selected from propylene oxide, ethylene oxide, and butylene oxide to the mixture at the first temperature, allowing the mixture to react to form a reacted mixture, adding a Lewis acid catalyst to the reacted mixture, setting the reaction mixture including the second catalyst to have a second temperature that is less than the first temperature, and adding additional at least one selected from propylene oxide, ethylene oxide, and butylene oxide to the reacted mixture at the second temperature such that a resultant polyol having a primary hydroxyl group content of at least 60% and a number average molecular weight greater than 2,500 g/mol is formed.

    VISCOELASTIC FOAM
    24.
    发明申请

    公开(公告)号:US20150004389A1

    公开(公告)日:2015-01-01

    申请号:US14344343

    申请日:2012-09-20

    Abstract: Embodiments of the invention provide for viscoelastic polyurethane foams. The foams are made from reaction system which includes (a) an isocyanate reactive component, (b) a isocyanate component, (c) one or more blowing agents, (d) a catalyst component, and (e) a silicone based surfactant. The isocyanate reactive component includes at least (i) from 25 to 80% by weight of at least one polyoxyethylene capped polyoxypropylene/polyoxyethylene polyol having a combined number average equivalent weight from 1300 to 1700, a polyoxyethylene percentage of between 75% and 95% by weight of the combined amounts of polyoxypropylene and polyoxyethylene, and a primary OH percentage of between 80 and 95% of the total number of OH groups of the polyoxyethylene capped polyoxypropylene/polyoxyethylene polyol, and (ii) from 5 to 30% by weight of the isocyanate reactive component of at least one low functionality polyol having a functionality of between 1.5 and 2.5, a combined number average equivalent weight from 500 to 1500 and an OH number of 40 to 70.

    Abstract translation: 本发明的实施方案提供了粘弹性聚氨酯泡沫。 泡沫由反应体系制成,其包括(a)异氰酸酯反应性组分,(b)异氰酸酯组分,(c)一种或多种发泡剂,(d)催化剂组分和(e)硅氧烷基表面活性剂。 异氰酸酯反应性组分包括至少(i)25至80重量%的至少一种聚均数当量为1300至1700的聚氧乙烯封端的聚氧丙烯/聚氧乙烯多元醇,聚氧乙烯百分比为75-95% 聚氧丙烯和聚氧乙烯的组合量的重量,聚氧乙烯封端的聚氧丙烯/聚氧乙烯多元醇的OH基总数的80-95%的主要OH百分比,和(ii)5-30重量% 至少一种官能度为1.5至2.5的低官能度多元醇的异氰酸酯反应性组分,组合的数均当量为500至1500,OH数为40至70。

Patent Agency Ranking