Browse Prior Art Database

MODIFICATION OF RHEOLOGICAL AND VOLATILES PROPERTIES OF THERMOPLASTIC POLYMERS VIA POST REACTOR CHEMICAL TREATMENTS

IP.com Disclosure Number: IPCOM000028634D
Publication Date: 2004-May-25
Document File: 1 page(s) / 20K

Publishing Venue

The IP.com Prior Art Database

Abstract

The invention relates to an improved reactive extrusion process for manufacturing of controlled rheology polymers by contacting the polymer with oxidizing agents such as oxygen, peroxides and/or ozone containing gases. The resultant polymer has a lower level of undesirable volatiles, fewer oligomers and more uniform rheological properties related to the polymer molecular weight and elasticity. Also, a low cost of manufacturing of branched, high melt strength polymer with lower levels of volatiles is possible.

This text was extracted from a Microsoft Word document.
This is the abbreviated version, containing approximately 100% of the total text.

MODIFICATION OF RHEOLOGICAL AND VOLATILES PROPERTIES OF THERMOPLASTIC POLYMERS VIA POST REACTOR CHEMICAL TREATMENTS

The invention relates to an improved reactive extrusion process for manufacturing of controlled rheology polymers by contacting the polymer with oxidizing agents such as oxygen, peroxides and/or ozone containing gases.  The resultant polymer has a lower level of undesirable volatiles, fewer oligomers and more uniform rheological properties related to the polymer molecular weight and elasticity.  Also, a low cost of manufacturing of branched, high melt strength polymer with lower levels of volatiles is possible.

Without limiting to other polymers and applications, the primary application of this process is for the highly rheology modified polypropylene products used in the melt blown spun bond and textile fiber spinning applications.  However, it can be applied to many other applications and polymers.  The process utilizes oxidative rheological modifications, typically by peroxides, in order to realize significant savings of raw materials, lower cost processing and improved product properties.  The method can be applied to all of the melt flow rates currently utilized in polypropylene processes.


Document headers and footers