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:
Feb. 02, 1988
Filed:
Jul. 25, 1986
Applicant:
Inventors:
Eize Roerdink, Beek, NL;
Jean M Warnier, Urmond, NL;
Assignee:
Stamicarbon, B.V., Geleen, NL;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G / ; C08G / ;
U.S. Cl.
CPC ...
528335 ; 525420 ; 528336 ;
Abstract
A reproducible method for the preparation of high molecular weight white poly(tetramethyleneadipamide) nylon 4,6 using moderate temperatures and relatively short reaction times is disclosed. In the method, the prepolymerization step is limited under controlled reaction conditions so that a prepolymer is formed with a very low degree of polymerization, whereby a shorter, commercially viable, after-condensation time is achieved to obtain a high molecular weight final poly-condensation polymer product.