Polyurethane adhesive mixtures

US4731410A · kind A · utility

Assignee

• BASF SE

Inventors

• Uwe Bueltjer · Ludwigshafen, DE
• Rainer Hummerich · Worms, DE
• Michael Kerber · Cleveland Heights, US

Key dates

• Filing date: Jul 2, 1986
• Grant date: Mar 15, 1988
• Expiry date: Jul 2, 2006

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G2170/20
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Polyurethane adhesive mixtures or polyurethane adhesive solutions contain PA0 (a) a polyurethane elastomer which advantageously has a mean molecular weight of not less than 30,000 and which is prepared by reacting PA1 (i) one or more essentially linear polyesterpolyols and PA1 (ii) one or more chain extenders with PA1 (iii) a mixture of 4,4'- and 2,4'-diphenylmethane diisocyanate isomers in a weight ratio of from 60:40 to 40:60 and PA0 (b) if appropriate, additives and/or organic solvents.