首页>
外国专利>
Being the revised technology in the manner which continually produces the polyurethane from production mannered null reaction
Being the revised technology in the manner which continually produces the polyurethane from production mannered null reaction
展开▼
机译:以不断改进的无效反应方式连续生产聚氨酯的方式,是一项经过修订的技术
展开▼
页面导航
摘要
著录项
相似文献
摘要
Nickel acetyl acetonate catalysts used in the manufacture of polyurethanes and particularly polyurathane foam, is replaced with a more environmentally friendly organo-metallic catalyst, specifically other metal acetyl acetonates such as iron or copper. In accordance with an important feature of this invention, in addition to the metal acetyl acetonate, the catalyst system also includes acetyl acetone. The acetyl acetone acts as a delay mechanism to delay the catalytic action of the metal acetyl acetonate which is normally highly catalytic at relatively low temperatures. It will be appreciated that high catalytic activity at relatively low temperature will lead to deleterious premature cure. By adding acetyl acetone into the catalyst system, the acetyl acetone acts to delay and/or slow the catalytic action of the metal acetyl acetonate until the polyurethane is heated at which point the acetyl acetone is driven off and the metal acetyl acetonate then provides a relatively fast cure at the elevated temperature.
展开▼