US Patent No: 6,494,390

Number of patents in Portfolio can not be more than 2000

Solid state shear pulverization of multicomponent polymeric waste

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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, IL43
NORTHWESTERN UNIVERSITYEVANSTON, IL1035

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Khait, Klementina Skokle, IL 17 102
Riddick, Erin G Chicago, IL 2 13

Cited Art Landscape

Patent Info (Count) # Cites Year
 
ILLINOIS INSTITUTE OF TECHNOLOGY (3)
5,415,354 Solid state shear extrusion pulverization 14 1993
5,397,065 Solid state shear extrusion pulverization 20 1993
5,743,471 Solid state shear extrusion pulverization 20 1995
 
NORTHWESTERN UNIVERSITY (2)
5,814,673 Reconstituted polymeric materials derived from post-consumer waste, industrial scrap and virgin resins made by solid state pulverization 23 1996
6,180,685 Reconstituted polymeric materials derived from post-consumer waste, industrial scrap and virgin resins made by solid state shear pulverization 16 1998
 
Phillips Cables Limited (2)
4,181,647 Process for extrusion coating of a wire with a cellular thermoplastic resin material 52 1976
4,367,190 Screw extruder 22 1981
 
BANK OF OKLAHOMA, N.A. (1)
5,268,074 Method for recycling polymeric film 36 1991
 
BASF AKTIENGESELLSCHAFT (1)
5,073,320 Preparation of thermoplastics containing ceramic powders as fillers 19 1990
 
Daiwa Seiko, Inc. (1)
5,395,065 Fishline length measuring device for fishing reel 17 1992
 
E. I. DU PONT DE NEMOURS AND COMPANY (1)
4,650,126 Process for ambient temperature grinding of soft polymers 26 1985
 
Frenkel C-D Aktiengesellschaft (1)
4,184,772 Mixing apparatus 34 1977
 
General Technology Applications, Inc. (1)
4,917,834 Method for forming homogeneous blends of particulate materials 12 1988
 
Institut National de Recherche Chimique Appliquee (1)
4,250,222 Process for manufacturing finished and semi-finished products from mixtures of various synthetic resin scrap materials 86 1975
 
JAPAN STEEL WORKS, LTD., THE (1)
4,890,996 Continuous granulating machine 45 1982
 
L.R. NELSON CORPORATION (1)
4,997,131 Ball valve pistol nozzle 28 1989
 
Mobil Oil Corporation (1)
4,708,617 Screw extruder with a rotatable barrel section 16 1986
 
NAUCHNO-PROIZVODSTVENNOE OBIEDINENIE "NORPLAST (1)
4,607,796 Method of making powder from rubber and vulcanization products 26 1984
 
NPO NORPLAST PIROVSKAJAUL 26, MOSCOW 111394 USSR (1)
4,607,797 Method and apparatus for pulverizing polymers 41 1984
 
OTVD (Omnium de Traitements et de Valorisation des dechets) (1)
4,968,463 Process for making molded or extruded objects from waste containing plastic materials 131 1989
 
Owl Co., Ltd. (1)
4,772,430 Process for compacting and solidifying solid waste materials, apparatus for carrying out the process and overall system for disposal of such waste materials 31 1985
 
ROSENDAHL MASCHINEN GMBH (1)
4,716,000 Process and apparatus for the production of a cross-linked, extruded or sprayed product 15 1985
 
WENGER MANUFACTURING, INC. (1)
4,875,847 Twin-screw extruder having respective conical nose screw sections 62 1989
 
Other [Check patent profile for assignment information] (3)
4,511,091 Method and apparatus for recycling thermoplastic scrap 16 1983
5,026,512 Method for manufacturing molded products of thermoplastic and inorganic materials 29 1989
5,088,914 Double flighted extrusion screw 26 1990

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
Advanced Environmental Recycling Technologies, Inc. (5)
8,106,103 Method for processing and analyzing contaminated mixed waste plastics to produce reformulated, blended feed materials having a desired color 0 2008
8,106,104 Method for processing and analyzing contaminated mixed waste plastics to produce reformulated, blended feed materials having a desired plastic content 0 2008
8,101,100 Method for processing and analyzing contaminated mixed waste plastics to produce reformulated, blended feed materials having a target density 1 2008
8,066,207 Method for processing and analyzing contaminated mixed waste plastics to produce reformulated, blended feed materials having desired physical properties 0 2008
7,968,022 Method for processing and analyzing contaminated mixed waste plastics to produce reformulated blended feed materials having a desired rheology 0 2008
 
E. I. DU PONT DE NEMOURS AND COMPANY (1)
8,309,223 Polyimide based purge media and methods relating thereto 0 2010
 
EXXONMOBIL CHEMICAL PATENTS INC. (1)
7,670,523 Impact strength improvement of regrind 0 2007
 
KIMBERLY-CLARK WORLDWIDE, INC. (1)
8,550,386 Oil absorbing material and processes of recycling absorbent articles to produce the same 0 2010
 
MATERIAL SCIENCES CORPORATION (1)
6,849,215 Reconstituted polymeric materials derived from post-consumer waste, industrial scrap and virgin resins made by solid state shear pulverization 9 2002
 
MILLIKEN & COMPANY (1)
7,758,961 Functionalized nanoparticles and their use in particle/bulk material systems 1 2008
 
PANASONIC CORPORATION (1)
7,900,856 Method of sorting resin 1 2008
 
RECLAIM, LLC (1)
8,092,205 Material manufactured from recycled plastics 2 2007
 
TECHNOLOGY DEVELOPMENT CENTER, KING ABDULAZIZ CITY FOR SCIENCE AND TECHNOLOGY (1)
8,536,238 Process for preparing insulation sheets from unseparated mixtures of post-consumer plastic articles 0 2010

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11.5 Year Payment $7400.00 $3700.00 $1850.00 Jun 17, 2014
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