| 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. |