Prepolymers containing isocyanate groups

Details Prepolymers containing isocyanate groups Prepolymers containing isocyanate groups

C - Chemistry, Metallurgy

07

C

C07C 271/28 (2006.01) C08G 18/12 (2006.01) C08G 18/40 (2006.01) C08G 18/48 (2006.01) C08G 18/50 (2006.01) C08G 18/66 (2006.01) C08G 18/70 (2006.01) C08G 65/333 (2006.01)

Patent

CA 2149820

The invention relates to prepolymers containing isocyanate groups which can be prepared by reacting a) organic isocyanates with b) polyetherols containing at least 2 hydroxyl groups per mole- cule and having molecular weights of greater than 900 and/or polyesterols containing at least 2 hydroxyl groups per mole- cule and having molecular weights of greater than 400, c) isocyanate-reactive compounds which are at least difunctional and have molecular weights of from 18 to 399, and, if desired, d) Lewis and/or Bronsted acidic compounds and e) conventional auxiliaries and additives, such as antioxidants, light stabilizers or fillers, wherein at least one aromatic aminopolyether alcohol of the formula Image where R is aryl, alkylaryl containing one or more C1- to C4 -alkyl groups, haloaryl, nitroaryl or cyanoaryl, R' and R" are identical or different and are, independently of one another, hydrogen, alkyl, aryl, aralkyl, alkoxyalkyl, alkoxyaryl or aroxyaryl, x and y are independent of one another and x + y 10, Z is from 1 to 4, is employed as a further component, their preparation and their use for the preparation of compact or cellular polyurethanes.

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