Solid state shear pulverization of multicomponent polymeric waste

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 6494390
SERIAL NO

09635673

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A method of making polymeric particulates wherein polymeric scrap material such as in the form of film waste is supplied to intermeshing pulverizer screws which are rotated to transport the polymeric material along their length and subject the polymeric material to solid state shear pulverization and in-situ polymer compatibilization. Uniform pulverized particulates are produced without addition of a pre-synthesized compatibilizing agent. The pulverized particulates are directly melt processable (as powder feedstock) and surprisingly yield a substantially homogeneous light color product. The polymeric film waste containing high proportions of LDPE yield molded articles of superior notched izod impact strength and elongation. Compatibilized polymeric particles can be formed even if the polymeric scrap material includes cellulose materials such as paper, cardboard and wood.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
MATERIAL SCIENCES CORPORATIONELK GROVE VILLAGE, IL13
NORTHWESTERN UNIVERSITYEVANSTON, IL1032

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Khait, Klementina Skokie, IL 13 187
Riddick, Erin G Chicago, IL 2 18

Cited Art Landscape

Patent Info (Count) # Cites Year
 
Other [Check patent profile for assignment information] (4)
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NORTHWESTERN UNIVERSITY (2)
5814673 Reconstituted polymeric materials derived from post-consumer waste, industrial scrap and virgin resins made by solid state pulverization 33 1996
6180685 Reconstituted polymeric materials derived from post-consumer waste, industrial scrap and virgin resins made by solid state shear pulverization 25 1998
 
BANK OF OKLAHOMA, N.A. (1)
* 5268074 Method for recycling polymeric film 44 1991
 
ILLINOIS INSTITUTE OF TECHNOLOGY (3)
5415354 Solid state shear extrusion pulverization 15 1993
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L.R. NELSON CORPORATION (1)
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Owl Co., Ltd. (1)
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BASF AKTIENGESELLSCHAFT (1)
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* Cited By Examiner

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
E. I. DU PONT DE NEMOURS AND COMPANY (2)
8309223 Polyimide based purge media and methods relating thereto 0 2010
* 2013/0029,154 POLYIMIDE BASED PURGE MEDIA AND METHODS RELATING THERETO 0 2012
 
PANASONIC CORPORATION (1)
* 7900856 Method of sorting resin 1 2008
 
EXXONMOBIL CHEMICAL PATENTS INC. (1)
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KING ABDULAZIZ CITY FOR SCIENCE AND TECHNOLOGY (3)
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MILLIKEN & COMPANY (2)
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ZZYZX POLYMERS LLC (1)
9296882 Methods for increasing throughput rates of solid-state extrusion devices 0 2014
 
APPLIED POLYMER SCIENCES LLC (2)
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KIMBERLY-CLARK WORLDWIDE, INC. (2)
8550386 Oil absorbing material and processes of recycling absorbent articles to produce the same 1 2010
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The United States of America as represented by the United States Department of Energy (1)
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MATERIAL SCIENCES CORPORATION (1)
* 6849215 Reconstituted polymeric materials derived from post-consumer waste, industrial scrap and virgin resins made by solid state shear pulverization 10 2002
 
EXTRUSION DIES INDUSTRIES, LLC (2)
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RECLAIM, LLC (1)
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UPM-KYMMENE CORPORATION (1)
* 2011/0256,348 METHOD FOR FORMING A WOOD COMPOSITE PRODUCT, A WOOD COMPOSITE PRODUCT, AND AN APPARATUS FOR THE MANUFACTURE OF A WOOD COMPOSITE PRODUCT 0 2009
 
Advanced Environmental Recycling Technologies, Inc. (5)
8106103 Method for processing and analyzing contaminated mixed waste plastics to produce reformulated, blended feed materials having a desired color 0 2008
8106104 Method for processing and analyzing contaminated mixed waste plastics to produce reformulated, blended feed materials having a desired plastic content 0 2008
8101100 Method for processing and analyzing contaminated mixed waste plastics to produce reformulated, blended feed materials having a target density 3 2008
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* Cited By Examiner