Polyesters which contain carbonamide groups and a process for their preparation

  • Inventors:
  • Assignees: Bayer Ag
  • Publication Date: March 28, 1973
  • Publication Number: GB-1311216-A

Abstract

1311216 Polyesteramides BAYER AG 17 June 1970 [11 July 1969] 29362/70 Heading C3R Polyesters containing carbonamide groups are prepared by reacting at least one lactone of the general formula in which n is an integer of 4 to 6, R 1 and R 2 , which may be the same or different, represent hydrogen atoms, C 1 to C 4 and alkyl radicals, C 6 to C 12 cycloalkyl radicals, C 1 to C 4 alkoxy radicals or substituted or unsubstituted C 6 to C 12 aryl radicals, in which n + 2 of the radicals represent hydrogen atoms, and in which the #-carbon atom bears at least one hydrogen atom, and R 3 represents a hydrogen atom or a C 1 to C 4 alkyl radical; with at least one lactam of the general formula in which R 1 , R 2 , R 3 and n have the meanings given above, and in which the #-carbon atom bears at least one hydrogen atom, at a temperature of 50‹ to 300‹ C. in the presence of an initiator which is a low molecular weight organic compound which contains at least two active hydrogen atoms. Preferred initiators are ethylene glycol, glycerol, ethylenediamine, aminoethanol, hydrazine or hydrazine derivatives having the general formula in which R and R<SP>1</SP>, which may be the same or different, are hydrogen atoms, C 1 to C 4 alkyl radicals, C 1 to C 4 hydroxyalkyl radicals, alkyl radicals, cyanoethyl radicals, substituted or unsubstituted C 6 to C 12 aryl radicals or heterocyclic radicals. In the examples polyesters are prepared from #-caprolactone and #-caprolactam. The polyesters are suitable as plasticizers and stabilizers for polyvinyl chloride.

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