Composition for anionic lactam polymerization

Abstract

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.