Use of oligomeric carbodiimides as stabilizers

US8623945B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Theo Smit · Heidelberg, DE
• Laurence Pottie
• Simone Schillo · Ludwigshafen, DE
• Volker Frenz · Hochheim, DE
• Roelof van der Meer · Krimpen aan den IJssel, NL

Key dates

• Filing date: Mar 15, 2012
• Grant date: Jan 7, 2014
• Expiry date: Mar 15, 2032

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08K5/3412
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

This invention relates to a process for stabilizing polymers with oligomeric carbodiimides containing at least one heterocyclic end group and stabilizers. The oligomeric carbodiimides may be compounds of the general formula (I):where A1, A2 are each independently, identically or differently, hydrocarbon groups having 2 to 20 carbon atoms, B1, B2 are each independently, identically or differently, heterocycles, C1-C30-alcohols, polyetherols, polyesterols, amines, polyether amines, polyester amines, thioalcohols, polyether thiols, polyester thiols; R1, R2 are each independently, identically or differently:n is an integer from 2 to 100, and A1, A2, B1 and B2 may each be substituted at any desired position by C1-C20-alkyl, C2-C20-alkenyl, C2-C20-alkynyl, C1-C20-alkoxy, carbonyl oxygen (═O) or halogen, with the proviso that at least one B1 or B2 substituent is a heterocyclic end group. The invention also relates to compositions of the oligomeric carbodiimides and mixtures.