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 1 is a bifunctional aliphatic C 2 - C 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° C (preferably 0° to +30° 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 5 per one equivalent of carboxylic groups at -15° C to +100° C, preferably at 0° C to +30° C.
Inventors
👤 Jaroslav Stehlicek
👤 Jan Sebenda
Bibliographic Details
Application Number—
JurisdictionUS
Data Sourcegoogle_patents
Last Synchronized2026-11-04 19:19
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/30
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
178 words
Method for preparation of polymers containing N-acyllactam groups of the general formula I ##STR7## where R 1 is a bifunctional aliphatic hydrocarbon residue containing 2 to 15 carbon atoms, which may be linear or branched n is an integer and P is a n-functional polymeric residue, which may be linear, branched or can form the part of a three-dimensional network, wherein the polymers containing acyl halide groups of the general formula II ##STR8## where n and P have the above given meaning and X is Cl or Br, are subjected to the reaction with a trisubstituted N-silylactam of the general formula III ##STR9## where R 1 has the above given meaning and R 2 , R 3 and R 4 are the same or different alkyl or aryl groups containing 1 to 7 carbon atoms, in an inert solvent at the temperature -15° C. to +100° C., preferably at the temperature 0° C. to +30° C., while 1 to 5 molar parts of the trisubstituted N-silyllactan is used per one equivalent of acyl halide groups of the polymer.
Claim 2
Dependent Claim
178 words
Method for preparation of polymers containing N-acyllactam groups of the general formula I ##STR7## where R 1 is a bifunctional aliphatic hydrocarbon residue containing 2 to 15 carbon atoms, which may be linear or branched n is an integer and P is a n-functional polymeric residue, which may be linear, branched or can form the part of a three-dimensional network, wherein the polymers containing acyl halide groups of the general formula II ##STR8## where n and P have the above given meaning and X is Cl or Br, are subjected to the reaction with a trisubstituted N-silylactam of the general formula III ##STR9## where R 1 has the above given meaning and R 2 , R 3 and R 4 are the same or different alkyl or aryl groups containing 1 to 7 carbon atoms, in an inert solvent at the temperature -15° C. to +100° C., preferably at the temperature 0° C. to +30° C., while 1 to 5 molar parts of the trisubstituted N-silyllactan is used per one equivalent of acyl halide groups of the polymer.
Claim 3
Dependent Claim
67 words
Methods as set forth in the claim 1, wherein polymeric acyl chloride is used as the polymer containing acyl halide groups, which is prepared by reaction of a polymer containing carboxylic groups with 1 to 5 molar of phosphorus pentachloride per one equivalent of carboxylic groups of the latter polymer at the temperature -15° C. to +100° C., preferably at the temperature 0° C. to Y+30° C.
Claim 4
Dependent Claim
30 words
Method as set forth in the claim 1, wherein N-trimethylsilyllactam of the general formula IV ##STR10## where R 1 has the above given meaning, is used as the trisubstituted N-silyllactam.
Claim 5
Dependent Claim
51 words
A method as set forth in claim 1, wherein the acyl halide group-containing polymer of the general formula II comprises the reaction product of a carboxylic groupcontaining polymer and phosphorus pentachloride in the ratio of 1 to 5 molar parts of the latter per equivalent of carboxylic groups of the former.