Two-package polyurethane sealant compositions and their use

Abstract

Abstract 1. Two-component polyurethane sealant compositions containing cross-linkable polyurethane polymers, hardeners, adhesion promotors and plasticizers as well as usual additives, characterized in that the first component contains a) 10 to 50% by weight of linear and/or branched polymers with ether and urethane groups as well as cross-linkable, blocked isocyanate groups, b) 0 to 15% by weight of epoxy resin, c) 0.1 to 2.5% by weight trialkoxysilane, d) 2 to 25% by weight plasticizer and optionally e) 0.5 to 5% by weight of a thixotropic agent and the second component contains f) cycloaliphatic diamines, preferably in an amount of 5 to 20% by weight as hardener and g) tertiary amines and/or amidin derivatives, preferably in an amount of 1 to 10% by weight as accelerator and that the weight ratio of the first component to the second component is 2 : 1 to 100 : 1, the weight ratio of a) + b) to f) being between 10 : 1 and 40 : 1.

Inventors

• 👤 Georg Schwebel
• 👤 Martin Dr. Rocholl
• 👤 Michael Schätzle

Bibliographic Details