Method of anionic polymerization of .omega.-aminoacid lactams with alkali metal-Al,B-alkoxy lactamate initiator
AssigneeVysoka skola chemicko-technologicka
InventorsJaroslav Kralicek, Vladimir Kubanek, Jiri Marik, Jaroslava Kondelikova, Jiri Machacek, Bohuslav Casensky
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Abstract
A method is described for the anionic polymerization and copolymerization of .omega.-aminoacid lactams. This end is attained at elevated temperatures in the presence of a polymerization initiator of the formula MeZX.sub.m L.sub.n wherein Me is an alkali metal, Z is boron or aluminum, X is an alkoxy group and L is an organic residue derived from a lactam and being of the formula ##STR1## wherein a is an integer in the range 3-11, m is an integer in the range of 0-3, (m+n) is 4 and n is (4-m).
Claims2
A method for the anionic polymerization of at least one .omega.-aminoacid lactam of the formula ##STR13## wherein a is an integer ranging from 3 to 11 which comprises effecting polymerization at elevated temperatures in the presence of an initiator for the anionic polymerization of lactams, said initiator having the formula
- MeZX.sub.m L.sub.n
- wherein Me is an alkali metal selected from the group consisting of lithium, sodium and potassium, Z is selected from the group consisting of aluminum and boron, X is an alkoxy group of 3 to 6 carbon atoms and L is an organic residue derived from lactam of the formula ##STR14## wherein a is an integer from 3 to 11, m is an integer selected from 0, 1 and 3, the sum of m+n is 4, or n is (4-m) and an activator for the anionic polymerization of lactam, so resulting in a solid crystalline lactam polymer.
Dependencies are inferred from the claim text.