The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 20, 2011
Filed:
Feb. 11, 2004
Albert a Van Geenen, Sittard, NL;
Cornelia E. M. Bronsaer, Stein, NL;
Yvonne H Frentzen, Venlo, NL;
Stanislaus M. P. Mutsers, Geleen, NL;
Nicolaas J. M. L. Janssen, Stein, NL;
Albert A Van Geenen, Sittard, NL;
Cornelia E. M. Bronsaer, Stein, NL;
Yvonne H Frentzen, Venlo, NL;
Stanislaus M. P. Mutsers, Geleen, NL;
Nicolaas J. M. L. Janssen, Stein, NL;
DSM IP Assets B.V., Heerlen, NL;
Abstract
The invention relates to a process for preparing a melt-processable polylactam by contacting caprolactam monomer with an anionic polymerization catalyst, polymerizing said monomer and contacting the resulting polylactam with a protic compound. The anionic polymerization catalyst is chosen from the group consisting of alkali-earth-metal-lactamates and alkali-earth-metal-lactamate forming compounds and the protic compound has a pKa larger than 14. The resulting polylactam has a good melt-stability and very low cyclic dimer content.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile