A method for producing a polyurethane prepolymer having terminal isocyanate groups is provided wherein one or more polyisocyanates are reacted with one or more polyols and wherein at least one asymmetric diisocyanate, at least one polyol having an average molecular weight (M
n
) of 60 to 3000 g/mol, and at least one carboxamide catalyst are used. The ratio of isocyanate groups to hydroxyl groups is set in the range between 1.1:1 to 4:1.
提供了一种生产具有末端异氰酸酯基团的聚氨酯预聚物的方法,其中一种或多种多异氰酸酯与一种或多种多元醇反应,至少一种不对称二异氰酸酯、至少一种平均分子量(M
n
)的至少一种多元醇和至少一种羧酰胺催化剂。异氰酸酯基团与羟基基团的比例设定在 1.1:1 至 4:1 之间。
MONOMERARMER REAKTIVKLEBSTOFF MIT MEHRSTUFIGER AUSHÄRTUNG
申请人:Henkel Kommanditgesellschaft auf Aktien
公开号:EP1328603A1
公开(公告)日:2003-07-23
POLYURETHAN-PREPOLYMERE MIT NCO-GRUPPEN UND NIEDRIGEM GEHALT AN MONOMEREN POLYISOCYANAT
申请人:Henkel AG & Co. KGaA
公开号:EP1341832B1
公开(公告)日:2016-10-19
VERFAHREN ZUR HERSTELLUNG VON POLYURETHAN-PREPOLYMEREN IN GEGENWART EINES KATALYSATORS
申请人:Henkel Kommanditgesellschaft auf Aktien
公开号:EP1572772B1
公开(公告)日:2006-09-06
METHOD FOR PRODUCING POLYURETHANE PREPOLYMERS
申请人:Eichelmann Holger
公开号:US20070129525A1
公开(公告)日:2007-06-07
The invention relates to a process for preparing a polyurethane prepolymer having terminal isocyanate groups by reacting polyisocyanates with polyols. The process includes a first synthesis stage and a second synthesis stage. A component (A) is prepared in the first synthesis stage using as polyisocyanate (X) at least one asymmetric polyisocyanate and using as polyol at least one polyol having an average molecular weight (M
n
) of 60 to 3000 g/mol, with the ratio of hydroxyl groups to isocyanate groups being less than 1. In the second synthesis stage, a further polyol is added to component (A), the reaction ratio of the hydroxyl groups of the further polyol to isocyanate groups of component A being set in the range from 1.1:1 to 2.0:1.