Composition for anionic lactam polymerization

a technology of anionic lactam and polymerization, which is applied in the direction of organic compound/hydride/coordination complex catalyst, physical/chemical process catalyst, chemical apparatus and processes, etc., can solve the problems of hexamethylene diisocyanate use, toxicity, and complicating the polymerization process

a technology of anionic lactam and polymerization, which is applied in the direction of organic compound/hydride/coordination complex catalyst, physical/chemical process catalyst, chemical apparatus and processes, etc., can solve the problems of hexamethylene diisocyanate use, toxicity, and complicating the polymerization process

US20120283406A1Inactive Publication Date: 2012-11-08BRUGGEMANNCHEM L BRUGGEMANN
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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0064]The activator composition of the present invention is obtained by mixing 70 weight % of poly(1,6-hexamethylene diisocyanate) (component a)) with 30 weight % of ε-caprolactone (CAS 502-44-3) (component b)) at 22° C.

[0065]Comparative Examples 1 to 3 are commercially available activator compositions.

example 2

[0073]In two glass round bottom flasks A and B 400 g of ε-caprolactam in each are placed and melted in an oil bath at 150° C. (temperature of the molten ε-caprolactam is 100° C., measured in the flask). Then, both flasks are flushed with nitrogen. 6.4 g of sodium caprolactamate catalyst (BRUGGOLEN® 10) is added to the molten ε-caprolactam flask A and stirred with a glass rod. After complete homogenization of mixture B, 5.6 g of the composition of the present invention (Example 1) is added to the flask B and heated to melt. After both melts (A and B) are homogenized, melt B and melt A, having 135° C. are simultaneously filled in a casting mold which was flushed with nitrogen gas before filling both melts A and B into the mold. The polymerization reaction is completed within 30 minutes.

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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.

Description

FIELD OF THE INVENTION[0001]This invention relates to a composition for the preparation of polyamides by activated anionic polymerization of lactams.BACKGROUND OF THE INVENTION[0002]The activated anionic polymerization of lactams is used in numerous different processes for the manufacture of polyimide shaped products. Unproblematic polymerization and the quality of the polyamides prepared by the various processes depend not only on the catalyst but to a large extent also on the nature of the activator used.[0003]Numerous compounds have been used as activators for the anionic polymerization of lactams, i.e. acyl lactams (EP1449865), oxazolines (EP0786482), ethylenebisamides (US2010 / 0113661), isocyanates and the corresponding masked isocyanate compounds.[0004]Polyisocyanates or isocyanates, particularly diisocyanates, are frequently used as activators. Hexamethylene diisocyanate is particular preferred since it is a highly mobile liquid and as such affords considerable advantage, part...

Claims

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Application Information

Patent Timeline
08 Nov 2012
Publication
US20120283406A1
IPC
C08F4/00; C08G69/00
CPC
C08G69/18; C08G69/20; C08G69/00; C08G18/34; C08G18/73; C08G69/14; C08L75/04; C08G69/16
Inventors
KLITSCHKE, JAN; BERGMANN, KLAUS