| abstract |
The invention relates to the use of compositions containing urea derivatives of cyanoacetic acid and urea as stabilisers for chlorine-containing thermoplastic plastics. Said derivatives are compounds of general formula (A), NC—CH 2 —CO—N(R 1 )—CO—NH—R 2 , where R 1 and R 2 =independently, a branched or unbranched, linear or cyclic, alkyl group with 1 to 18 C atoms, an aryl group with 6 to 18 C atoms, optionally substituted by one or more alkyl groups with 1 to 6 C atoms. |