COMPOSITION FOR ANIONIC LACTAM POLYMERIZATION
A composition comprising a) at least one aliphatic or cycloaliphatic isocyanate compound having at least two isocyanate groups and b) at least one lactone, containing 4 to 7 carbon atoms and use of the composition as an activator for anionic lactam polymerization to obtain polyamides.
1 . A composition comprising:
a) at least one aliphatic isocyanate compound having at least two isocyanate groups;
b) at least one lactone, containing 4 to 7 carbon atoms.
2 . The composition of claim 1 wherein component a) comprises poly(1,6-hexamthylene diisocyante).
3 . The composition of claim 1 wherein component b) comprises ε-caprolactone.
4 . The composition of claim 1 wherein component a) is present in an amount of 30 to 80 weight %.
5 . The composition of claim 1 wherein component a) is present in an amount of 60 to 80 weight %.
6 . The composition of claim 1 wherein component a) is present in an amount of 20 to 40 weight %.
7 . The composition of claim 1 wherein component b) is present in an amount of 20 to 80 weight %.
8 . The composition of claim 1 wherein component b) is present in an amount of 20 to 40 weight %.
9 . The composition of claim 1 wherein component b) is present in an amount of 60 to 80 weight %.
10 . A process for producing a composition of claim 1 comprising the step of mixing component a) with component b).
11 . A process for producing a polyamide, wherein the process comprises adding a suitable amount of a composition of claim 1 to a suitable amount of a lactam.
12 . The process of claim 11 wherein the composition of claim 1 is added in an amount of from 0.1 to 10 weight % based on 100 weight % of the lactam.
13 . The process of claim 12 wherein the composition of claim 1 is added in and amount of from 0.1 to 4 weight % based on 100 weight % of the lactam.
14 . The polyamide obtained from the process of claim 11 .
15 . A shaped product comprising the polyamide of claim 14 .
16 . An article comprising the shaped product of claim 15 .
17 . A method of activating an anionic polymerization of a lactam comprising adding a suitable amount of a composition of claim 1 to a suitable amount of the lactam and polymerizing the lactam in the presence of an anionic polymerization catalyst.