Tertiary amine catalysts for polurethanes
    114.
    发明授权
    Tertiary amine catalysts for polurethanes 失效
    聚氨酯的叔胺催化剂

    公开(公告)号:US5091583A

    公开(公告)日:1992-02-25

    申请号:US697859

    申请日:1991-05-09

    摘要: The invention pertains to tertiary amines used as catalysts for the preparation of polyurethane foams prepared via the catalytic reaction of a polyisocyanate with a polyol in the presence of blowing agents, etc. The tertiary amine catalysts are prepared by reacting an olefinic nitrile with aliphatic polyol having at least secondary hydroxyl functionality in a ratio less than stoichiometric for providing cyanoalkylated polyol having residual hydroxyl functionality. The resulting cyanoalkylated polyol then is reacted with a secondary amine under conditions for effective reductive alkylation.The tertiary amine catalysts, because of residual secondary hydroxyl functionality, provide for uniform dispersion within a polyurethane, formulation; they provude for additional or extended pot life in polyurethane formulations at temperature below reaction condition, and they are bound by reaction on cure.

    摘要翻译: 本发明涉及用于制备通过多异氰酸酯与多元醇在发泡剂等的催化反应制备的聚氨酯泡沫的催化剂的叔胺。叔胺催化剂是通过烯烃腈与具有 至少具有小于化学计量比的仲羟基官能团以提供具有残余羟基官能团的氰基烷基化多元醇。 然后将所得的氰基烷基化多元醇与仲胺在有效还原烷基化的条件下反应。 由于残留的仲羟基官能团,叔胺催化剂在聚氨酯,配方中均匀分散; 它们在低于反应条件的温度下在聚氨酯配方中增加或延长适用期,并且它们通过固化反应而结合。

    Preparation of alkyl-extended, alcohol-extended or amine-extended
piperazines
    120.
    发明授权
    Preparation of alkyl-extended, alcohol-extended or amine-extended piperazines 失效
    烷基延伸的,延伸延伸的或延长胺的哌嗪的制备

    公开(公告)号:US4927931A

    公开(公告)日:1990-05-22

    申请号:US265610

    申请日:1988-11-01

    摘要: A process for preparing alkyl-extended, alcohol-extended or amine-extended piperazines or mixtures thereof comprising contacting a difunctional aliphatic alcohol with a reactant amine, wherein at least one of the aliphatic alcohol or the reactant amine contains a piperazine moiety, in the presence of a catalyst containing a Group VB metal oxide or a Group VB metal phosphate, or mixtures thereof. For example, monoethanolamine reacts with piperazine in the presence of a catalyst of niobic acid supported on hydrated alumina to yield predominantly N-(2-aminoethyl)piperazine. Also, N-hydroxyethylpiperazine reacts with piperazine in the presence of a catalyst of niobium phosphate to yield predominantly 1,2-bis(piperazinyl)ethane.

    摘要翻译: 制备烷基延伸的,延伸醇的或胺延伸的哌嗪或其混合物的方法,包括使二官能脂族醇与反应物胺接触,其中至少一种脂族醇或反应物胺含有哌嗪部分, 的含VB族金属氧化物或VB族金属磷酸盐的催化剂,或其混合物。 例如,单乙醇胺在负载在水合氧化铝上的铌酸催化剂存在下与哌嗪反应,主要产生N-(2-氨基乙基)哌嗪。 此外,N-羟乙基哌嗪在磷酸铌催化剂存在下与哌嗪反应,主要产生1,2-双(哌嗪基)乙烷。