Carbodiimides and/or oligomeric polycarbodiimides based on 1 3-bis (1-methyl-1-isocyanatoethyl) benzene their use as hydrolysis stabilizers

US5597942A · kind A · utility

Assignee

• BASF SE

Inventors

• Siegmund Pohl · Ludwigshafen, DE
• Friedhelm Lehrich · Bohmte, DE
• Manfred Genz · Ostercappeln, DE
• Bernd Bruchmann · Ludwigshafen, DE
• Helmut Tesch · Bad Dürkheim, DE
• Roland Minges · Havelsee, DE
• Joachim Streu · Dachau, DE

Key dates

• Filing date: Jan 30, 1996
• Grant date: Jan 28, 1997
• Expiry date: Jan 30, 2016

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L75/04
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Novel carbodiimides and/or oligomeric polycarbodiimides containing terminal isocyanate, urethane and/or urea groups are obtainable, for example, by condensation of 1,3-bis(1-methyl-1-isocyanatoethyl)benzene with elimination of carbon dioxide followed, if desired, by reaction of all or some of the free isocyanate groups of the resultant (poly)carbodiimides with aliphatic, cycloaliphatic or araliphatic amines, alcohols and/or alkoxypolyoxyalkylene alcohols, and are used as stabilizers against hydrolytic degradation of polyaddition and polycondensation products containing ester groups.