会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 52. 发明授权
    • Process for the production of compounds containing hydroxyl groups from
(polyurethane) polyurea waste materials
    • 从(聚氨酯)聚脲废料生产含羟基的化合物的方法
    • US5508312A
    • 1996-04-16
    • US429411
    • 1995-04-26
    • Thomas MunzmayHartmut NefzgerWerner RasshoferWalter Meckel
    • Thomas MunzmayHartmut NefzgerWerner RasshoferWalter Meckel
    • C08J11/24C08G18/65C08G18/83C08J11/18C08J11/28C08L75/00C08J11/04
    • C08J11/18C08J2375/04Y02W30/706
    • Compounds containing hydroxyl groups, which are suitable for the polyisocyanate addition polymerization process, are prepared from polyurethane-polyurea and/or polyurea waste materials. These compounds are produced by reacting a finely divided polyurethane-polyurea and/or polyurea waste material with a low molecular weight diol and/or polyol (and optionally a higher molecular weight polyol) and a low molecular weight urea and/or carbamic acid ester. This reaction may be carried in either one stage or two stages. In the two stage process, the waste material and diol/polyol are reacted in a first stage at a temperature of from about 100 to about 260.degree. C. In the second stage, the amine-containing alcoholysis product obtained in the first stage is reacted with a low molecular weight urea and/or carbamic acid ester. In the single stage process, the polyurethane-polyurea and/or polyurea waste material is reacted with a low molecular weight diol and/or polyol in the presence of a low molecular weight urea and/or carbamic acid ester.
    • 含有羟基的化合物,适用于多异氰酸酯加成聚合方法,由聚氨酯 - 聚脲和/或聚脲废料制备。 这些化合物通过使细分散的聚氨酯 - 聚脲和/或聚脲废料与低分子量二醇和/或多元醇(和任选的较高分子量的多元醇)和低分子量的脲和/或氨基甲酸酯反应来制备。 该反应可以在一个阶段或两个阶段中进行。 在二阶段工艺中,废料和二醇/多元醇在约100至约260℃的温度下在第一阶段中反应。在第二阶段中,使第一阶段获得的含胺醇解产物反应 与低分子量尿素和/或氨基甲酸酯。 在单阶段方法中,聚氨酯 - 聚脲和/或聚脲废料在低分子量脲和/或氨基甲酸酯的存在下与低分子量二元醇和/或多元醇反应。