公开(公告)号：US20060135724A1

公开(公告)日：2006-06-22

申请号：US11017090

申请日：2004-12-20

申请人： Bruce Lawrey ,  Robert Rebello ,  Roger Lane ,  W. Smith

发明人： Bruce Lawrey ,  Robert Rebello ,  Roger Lane ,  W. Smith

IPC分类号： C08G18/00

CPC分类号： D01F6/70 ,  C08G18/12 ,  C08G18/222 ,  C08G18/4854 ,  C08G18/4866 ,  C08G18/2865 ,  C08G18/3212

摘要： Segmented polyurethane/ureas useful in the production of spandex with improved heat set are produced by chain extending an isocyanate-terminated prepolymer with a diamine chain extender that includes: (1) greater than 25 to 75 equivalent percent of an asymmetric aliphatic and/or cycloaliphatic diamine and (2) a linear diamine such as ethylene diamine in the presence of a solvent. The isocyanate-terminated prepolymer having an isocyanate group content of from about 2.25 to about 4 is produced by reacting a stoichiometric excess of an isocyanate with an isocyanate-reactive component that includes: (1) from about 25 to about 75 equivalent percent of a polyoxypropylene diol having a molecular weight in excess of 1500 Da and an average unsaturation level of less than about 0.03 meq/g and (2) from about 25 to about 75 equivalent percent of a polytetramethylene ether glycol having a molecular weight of at least 600 Da.

摘要翻译： 通过用二胺扩链剂将异氰酸酯封端的预聚物链延伸而产生用于生产具有改进的热定型的氨纶的分段聚氨酯/脲，其包括：（1）大于25至75当量％的不对称脂族和/或脂环族 二胺和（2）直链二胺如乙二胺在溶剂存在下进行。 异氰酸酯封端的异氰酸酯基团含量约为2.25至约4的预聚物通过使化学计量过量的异氰酸酯与异氰酸酯反应性成分反应来制备，该组分包括：（1）约25至约75当量的聚氧丙烯 二醇的分子量超过1500Da，平均不饱和度低于约0.03meq / g，（2）约25-约75当量分子量至少为600Da的聚四亚甲基醚二醇。