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USE OF CARBONIC-ACID/CARBAMIC-ACID ANHYDRIDES AS CO2-CLEAVING BLOWING AGENTS IN THE PRODUCTION OF CELLULAR OR FOAM-LIKE PLASTICS
USE OF CARBONIC-ACID/CARBAMIC-ACID ANHYDRIDES AS CO2-CLEAVING BLOWING AGENTS IN THE PRODUCTION OF CELLULAR OR FOAM-LIKE PLASTICS
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机译:在生产蜂窝状或泡沫塑料中使用碳酸/氨基甲酸乙酯作为裂解二氧化碳的发泡剂
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摘要
This invention relates to solid reaction products of aliphatic, cycloaliphatic or araliphatic mono- and/or polyisocyanates and organic, weakly acid mono- and/or polycarboxylic acids for the production of cellular plastics articles and particularly polyurethane foams. The products of the present invention may also be in the form of mixtures with carboxylic acids. The products are suitable for the production of cellular or porous plastics articles, but are preferably used in the preparation of cellular thermoplastic polyurethanes and semi-rigid and particularly rigid polyurethane integral skin foams having a compact outer skin formed by foaming the reaction mixture in closed molds.
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