The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 26, 1977
Filed:
Mar. 18, 1976
Jaroslav Stehlicek, Prague, CS;
Jan Sebenda, Prague, CS;
Ceskoslovenska akademie ved, Prague, CS;
Abstract
The invention relates to the method for preparation of polymers containing N-acyllactam groups which are suitable as polymeric activators of anionic polymerization of lactams to obtain graft copolymers or block copolymers of the AB or ABA type, where A is the polyamide block. The polymers of the general formula I ##STR1## wherein R.sup.1 is a bifunctional aliphatic C.sub.2 - C.sub.15 hydrocarbon residue, n is an integer and P is a n-functional linear, branched or crosslinked polymeric residue, are prepared by the reaction of polymeric acyl halides of the general formula II ##STR2## where X = Cl or Br, with 1 - 5 mole of trisubstituted N-silyllactam, e.g. N-trimethylsilyllactams or N-phenyldimethylsilyllactams, per one equivalent of acyl halide group in an inert solvent at -15 to +100.degree. C (preferably 0.degree. to +30.degree. C). The polymeric acyl chlorides (the general formula II, X = Cl) are advantageously prepared from polymers containing carboxylic groups and 1 - 5 moles of PCl.sub.5 per one equivalent of carboxylic groups at -15.degree. C to +100.degree. C, preferably at 0.degree. C to +30.degree. C.