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New amine adducts with carbon dioxide as blowing agents in the production of integral polyurethane foams

机译：新的胺加合物在二氧化碳中加合成型在整体聚氨酯泡沫中的发泡剂

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Blowing agents play an important role in the production of cellular polyurethanes. The traditional chemical blowing agent H2O/CO2 did not meet all application requirements. This led to the introduction of physical foaming agents in the 1950-1960s, which were subject to four further modifications due to climatic hazards. The recently introduced new generation of hydrofluoroolefins (HFOs) hydrocarbons is currently in the application assessment and meets the utility and climate requirements for now. Without waiting for a long-term final assessment of this blowing agent group, an attempt was made to introduce carbon dioxide in the form of adducts with aliphatic amines into the foaming process. As example compounds, CO2 adducts with aliphatic hydrocarbons containing also primary, secondary and tertiary nitrogen atoms in the same molecule were used. The synthesis of adducts was carried out by the absorption of carbon dioxide gas in a solution of amines in monoethylene glycol (MEG) and triethanolamine (TELA). The resulting solutions containing 12-16 wt % CO2 were next used in the application- oriented study. Amines regulating the foaming and gelation processes were used for the production of adducts, which allowed the elimination of organometallic gelling additives. Selected adducts were checked during the production of furniture chair seats on an industrial scale, obtaining integral foams in the range of density 190-294 kg/m(3) and hardness 22-38 degrees ShA. In the production process of these foams carried out at PLASTPUR a double-stream foaming machine from Hennecke was used.
机译：发泡剂在多孔聚氨酯的生产中起着重要作用。传统的化学发泡剂H2O/CO2不能满足所有应用要求。这导致了1950-1960年代物理发泡剂的引入，由于气候危害，物理发泡剂又进行了四次修改。最近推出的新一代氢氟烃（HFOs）目前正在进行应用评估，目前符合实用性和气候要求。在不等待该发泡剂组的长期最终评估的情况下，尝试将二氧化碳以脂肪胺加成物的形式引入发泡过程。作为示例化合物，使用了在同一分子中还含有一级、二级和三级氮原子的脂肪族碳氢化合物的CO2加合物。加合物的合成是通过在单乙二醇（MEG）和三乙醇胺（TELA）中的胺溶液中吸收二氧化碳气体进行的。随后在应用导向研究中使用含有12-16 wt%CO2的所得溶液。调节发泡和凝胶过程的胺被用于生产加合物，从而消除了有机金属凝胶添加剂。在工业规模的家具座椅生产过程中，对选定的加合物进行了检查，获得了密度为190-294 kg/m（3）和硬度为22-38°ShA的整体泡沫。在PLASTPUR进行的这些泡沫的生产过程中，使用了亨内克的双流发泡机。

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