EP 1456265 A1 20040915 - METHOD FOR PRODUCING POLYURETHANE PREPOLYMERS HAVING A LOW CONTENT OF MONOMERS
Title (en)
METHOD FOR PRODUCING POLYURETHANE PREPOLYMERS HAVING A LOW CONTENT OF MONOMERS
Title (de)
VERFAHREN ZUR HERSTELLUNG VON MONOMERARMEN POLYURETHAN PREPOLYMEREN
Title (fr)
PROCEDE POUR PRODUIRE DES PREPOLYMERES POLYURETHANNE A FAIBLE TENEUR EN MONOMERES
Publication
Application
Priority
- DE 10162144 A 20011218
- EP 0214399 W 20021217
Abstract (en)
[origin: WO03051951A1] The invention relates to a method for producing polyurethane prepolymers having terminal isocyanate groups during which polyisocyanates are reacted with polyols, whereby the following is effected in a first synthesis step (I): a) at least one asymmetrical diisocyanate is used as the polyisocyanate; b) at least one polyol having an average molecular weight (Mn) ranging from 60 to 3000 g/mol is used as the polyol; c) the ratio of isocyanate groups to hydroxyl groups ranges from 1.2: 1 to 4: 1; d) a catalyst is added, and after a successful reaction, the following is effected in a second synthesis step (II): e) at least one additional polyol is added in order to obtain a total ratio of isocyanate groups to hydroxyl groups ranging from 1.1: 1 to 2: 1. Polyurethane prepolymers produced in the aforementioned manner are suited for producing reactive one-component and two-component adhesives and sealants, particularly laminating adhesives, and as components for producing hot-melt adhesives. The polyurethane prepolymers produced according to the invention are low-viscous, have a low content of monomers, and do not contain any byproducts like those that usually result when thermally processing polyurethane prepolymers in order to demonomerize the same.
IPC 1-7
IPC 8 full level
C08G 18/10 (2006.01); C09J 175/04 (2006.01)
CPC (source: EP KR US)
C08G 18/08 (2013.01 - KR); C08G 18/10 (2013.01 - EP KR US); C08G 18/12 (2013.01 - KR); C09J 175/04 (2013.01 - EP KR US); C08G 2101/00 (2013.01 - EP US); C08G 2190/00 (2013.01 - EP US)
C-Set (source: EP US)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SI SK TR
DOCDB simple family (publication)
WO 03051951 A1 20030626; AU 2002358740 A1 20030630; BR 0215060 A 20041123; CA 2471252 A1 20030626; CN 1604926 A 20050406; DE 10259248 A1 20030710; EP 1456265 A1 20040915; HU P0402474 A2 20050329; HU P0402474 A3 20051028; JP 2005511873 A 20050428; KR 20040068953 A 20040802; MX PA04005750 A 20040910; PL 369173 A1 20050418; RU 2004122092 A 20060120; US 2005020706 A1 20050127
DOCDB simple family (application)
EP 0214399 W 20021217; AU 2002358740 A 20021217; BR 0215060 A 20021217; CA 2471252 A 20021217; CN 02825206 A 20021217; DE 10259248 A 20021217; EP 02793051 A 20021217; HU P0402474 A 20021217; JP 2003552827 A 20021217; KR 20047009549 A 20021217; MX PA04005750 A 20021217; PL 36917302 A 20021217; RU 2004122092 A 20021217; US 87134304 A 20040618