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:
May. 24, 1988
Filed:
Jun. 16, 1986
Applicant:
Inventors:
Assignee:
Stamicarbon, B.V., , NL;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
528318 ; 528315 ; 528323 ;
Abstract
The invention relates to a process for the preparation of a caprolactam that is not appreciably subject to re-equilibration during melt spinning of textile fibres. In the process such an amount of chain length regulating agent is used that the relative viscosity of the polyamide increases by not more than 0.5 units after 20 hour heat treatment in the solid phase in an inert gas atmosphere at between 110.degree. C. and 190.degree. C., after extraction.