Use of polyethyleneimines in the preparation of polyamides
AssigneeBASF SE
InventorsPhilippe Desbois, Andreas Wollny, Andreas Radtke, Bernd Bruchmann, Anna Karina Möller
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Abstract
The present invention relates to a process for preparing a composition comprising (A) at least one lactam, (B) at least one catalyst, (C) an activator from the group consisting of isocyanates, acid anhydrides, acyl halides, reaction products thereof with (A) and mixtures thereof, (D) at least one polyethyleneimine. The invention likewise relates to a composition comprising (i) 0.01 to 10 wt %, based on the sum total of components (A) and (D), of at least one polyethyleneimine, and (ii) 90 to 99.99 wt %, based on the sum total of components (A) and (D), of at least one lactam (A) and/or polyamide obtainable from (A).
Claims6
A process for preparing a composition comprising
- (A) at least one lactam,
- (B) at least one catalyst which is a compound enabling the formation of lactam anions,
- (C) an activator selected from the group consisting of isocyanates, acid anhydrides, acyl halides, reaction products thereof with (A) and mixtures thereof,
- (D) at least one polyethyleneimine;
- the process comprising mixing melts
- s1) comprising a portion of the at least one lactam (A), the activator (C), and the at least one polyethyleneimine (D), and
- s2) comprising the remainder of the at least one lactam (A) and the at least one catalyst (B).
A process for preparing a polyamide by preparing a composition comprising
- (A) at least one lactam,
- (B) at least one catalyst which is a compound enabling the formation of lactam anions,
- (C) an activator selected from the group consisting of isocyanates, acid anhydrides, acyl halides, reaction products thereof with (A) and mixtures thereof,
- (D) at least one polyethyleneimine;
- the process comprising mixing melts
- s1) comprising a portion of the at least one lactam (A), the activator (C), and the at least one polyethyleneimine (D), and
- s2) comprising the remainder of the at least one lactam (A) and the at least one catalyst (B);
- wherein the polyamide is a highly crosslinked polyamide.
Dependencies are inferred from the claim text.