Method for preparation of polymers which contain N-acyllactam gr

Details Method for preparation of polymers which contain N-acyllactam gr Method for preparation of polymers which contain N-acyllactam gr

1976-03-18

1977-07-26

Hamrock, William F.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526 16, 526 19, 526 21, 526 27, 526 46, 526 50, C08F 800, C08F 818, C08F 826, C08F 840

Patent

active

040384705

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.

REFERENCES:
patent: 3544541 (1970-12-01), Edwards et al.
patent: 3833633 (1974-09-01), Owen et al.

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