Prepolymers containing isocyanate groups

US5556891A · kind A · utility

Assignee

• BASF Schwarzheide GmbH · DE

Inventors

• Holger Seifert · Bad Driburg, DE
• Juergen Winkler · Langenfeld, DE
• Regina Pretzsch · Schwarzheide, DE
• Robert O'Meara · Arlington Heights, US

Key dates

• Filing date: Nov 1, 1995
• Grant date: Sep 17, 1996
• Expiry date: Nov 1, 2015

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G2101/00
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention relates to prepolymers containing isocyanate groups which can be prepared by reacting PA1 a) organic isocyanates with PA1 b) polyetherols containing at least 2 hydroxyl groups per molecule and having molecular weights of greater than 400 and/or polyesterols containing at least 2 hydroxyl groups per molecule and having molecular weights of greater than 400, PA1 c) isocyanate-reactive compounds which are at least difunctional and have molecular weights of from 18 to 399, and, if desired, PA1 d) Lewis and/or Bronsted acidic compounds and PA1 e) conventional auxiliaries and additives, such as antioxidants, light stabilizers or fillers, wherein at least one aromatic aminopolyether alcohol of the formula ##STR1## where R is aryl, alkylaryl containing one or more C.sub.1 - to C.sub.4 -alkyl groups, haloaryl, nitroaryl or cyanoaryl, PA1 R' and R" are identical or different and are, independently of one another, hydrogen, alkyl, aryl, aralkyl, alkoxyalkyl, alkoxyaryl or aroxyaryl, PA1 x and y are independent of one another and PA1 x+y.gtoreq.10, PA1 z is from 1 to 4, is employed as a further component, their preparation and their use for the preparation of compact or cellular …