Oligomeric carbodiimides

Details Oligomeric carbodiimides Oligomeric carbodiimides

C - Chemistry, Metallurgy

07

C

C07C 267/00 (2006.01) C07C 271/12 (2006.01) C07C 275/24 (2006.01) C08G 18/02 (2006.01) C08G 18/28 (2006.01) C08G 18/79 (2006.01) C08K 5/29 (2006.01) C08L 67/00 (2006.01)

Patent

CA 2076244

Abstract of the Disclosure: Oligomeric carbodiimides having an average degree of condensation of from 2 to 30, obtainable by oligocondensation of a) from 40 to 100 mol % of 2,4'-diisocyanatodiphenyl- methane or of a 3,3',5,5'-tetra-C1-C4-alkyl-4,4'- diisocyanatodiphenylmethane and b) from 0 to 60 mol % of a further bi- or polyfunction- al aromatic isocyanate and c) if desired, complete or partial reaction of the remaining free isocyanate groups of the oligomers with an aliphatic, araliphatic or cycloaliphatic alcohol or amine, are used mainly for stabilizing polyester-containing polyurethanes against hydrolytic degradation.

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