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:
Nov. 08, 2016
Filed:
Feb. 28, 2013
Invista North America S.Ă R.l., Wilmington, DE;
Gordon Shaw, Charlotte, NC (US);
Miguel Angel Osornio, Spartanburg, SC (US);
Invista North America S.a.r.l., Wilmington, DE (US);
Abstract
Methods of on-line control of molecular weight in continuous solid state polymerization processes. The solid state polymerization process can be a polyester process or to a polyamide process, and more specifically a poly(ethylene terephthalate) (PET) or a poly(butylene terephthalate) (PBT) or a nylon 6,6 continuous solid-state polymerization (SSP) process. An in-line viscometer melts and measures the molecular weight of the SSP resin and adjusts one or more of the process variables, i.e. reactor time, inert gas purity and inert gas temperature to maintain a constant resin molecular weight.