Use of polyethyleneimines in the preparation of polyamides

Patent metadata

Field	Value
Publication number	US-9486981-B2
Application number	US-201213612382-A
Country	US
Kind code	B2
Filing date	Sep 12, 2012
Priority date	Sep 13, 2011
Publication date	Nov 8, 2016
Grant date	Nov 8, 2016

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).

First claim

We claim:

1. 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).

2. The process according to claim 1 wherein the ratio of reactive groups of activator (C) to NH and/or NH 2 groups of polyethyleneimine (D) is in the range from 1:2 to 10:1.

3. The process according to claim 1 wherein polyethyleneimine (D) has a weight average molecular weight in the range from 100 to 3 000 000 g/mol as determined by light scattering.

4. The process according to claim 1 wherein polyethyleneimine (D) has a primary and/or secondary amino functionality of 10 to 70 000 per chain.

5. The process according to claim 1 wherein components (A) to (D) are exposed to a temperature of 40 to 240° C.

6. 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.

Assignees

• Desbois Philippe
• Wollny Andreas
• Radtke Andreas
• Bruchmann Bernd
• Möller Anna Karina
• Basf Se

Inventors

• Desbois Philippe
• Wollny Andreas
• Radtke Andreas
• Bruchmann Bernd
• Möller Anna Karina

Classifications

• B32B2262/106

  Carbon fibres, e.g. graphite fibres · CPC title

• B32B5/028

  Net structure, e.g. spaced apart filaments bonded at the crossing points · CPC title

• B32B5/12

  characterised by the relative arrangement of fibres or filaments of {different layers, e.g. the fibres or filaments being parallel or perpendicular to each other} · CPC title

• Y10T442/30

  Woven fabric [i.e., woven strand or strip material] · CPC title

• B32B5/26

  another layer {next to it} also being fibrous or filamentary {(relative arrangement of fibres or filaments of different layers B32B5/12)} · CPC title