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1. 发明授权

US5391586A Process for preparing flexible polyurethane foams and foams thus obtained 失效
标题翻译：制备由此获得的柔性聚氨酯泡沫和泡沫的方法
公开(公告)号：US5391586A
公开(公告)日：1995-02-21
申请号：US925344
申请日：1992-08-04
申请人： A. Leslie Peterson , Richard A. Riccitelli
发明人： A. Leslie Peterson , Richard A. Riccitelli
IPC分类号： C08G18/48 , C08G18/76 , C08G18/70
CPC分类号： C08G18/4845 , C08G18/7621 , C08G2101/0008 , C08G2101/005 , C08G2101/0083
摘要： A process for the production of flexible polyurethane foams by the reaction of a polyol and water with polyisocyanate in the presence of a blowing agent, the improvement wherein the polyisocyanate includes toluene diisocyanate having a 2,4-isomer to 2,6-isomer ratio is greater than 80:20. The invention encompasses a process for increasing softness of flexible foams by reacting a secondary hydroxyl terminated polyol with a polyisocyanate in the presence of a blowing agent of carbon dioxide derived from the polyisocyanate/water reaction, a substantially low amount of an auxiliary blowing agent, and the polyisocyanate including toluene diisocyanate having a 2,4-isomer to a 2,6-isomer ratio greater than 80:20. It has been found that by the present invention that there is obtained flexible polyurethane foams having the unexpected properties of 15% to 23% softening, increased tear strength, increased tensile strength, and increased percent elongation, and very little change in compression set properties.
摘要翻译：通过多元醇和水与多异氰酸酯在发泡剂存在下的反应来生产柔性聚氨酯泡沫体的方法，其中多异氰酸酯包括具有2,4-异构体与2,6-异构体比例的甲苯二异氰酸酯的改进是大于80:20。本发明包括通过在二异氰酸酯/水反应衍生的二氧化碳发泡剂，大量少量的辅助发泡剂和辅助发泡剂的存在下使仲羟基封端的多元醇与多异氰酸酯反应来提高柔性泡沫的柔软度的方法，以及多异氰酸酯包括具有2,4-异构体至2,6-异构体比大于80:20的甲苯二异氰酸酯。已经发现，通过本发明，获得具有15％至23％软化的突发性能，增加的撕裂强度，增加的拉伸强度和增加的伸长百分比以及压缩永久变形非常小的柔性聚氨酯泡沫。

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