US Patent No: 4,722,943

Number of patents in Portfolio can not be more than 2000

Composition and process for drying and expanding microspheres

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Abstract

Microsphere wet cake is mixed with a processing aid effective to prevent agglomeration and surface bonding of the microspheres, and thereafter removing water by drying with continuous mixing, optionally also under reduced pressure, i.e. vacuum drying. By the control of the application of heat and balancing temperature and the mixing, and optionally also the reduced pressure, it is possible to also control expansion of the microspheres from substantially none to substantially theoretical limits of expansion. The processing aid in the present invention is any one of a wide diversity of materials which meet the requirements of the intended function, i.e., to prevent the agglomeration of the microspheres during the process. Suitable materials include, by way of example, dry inorganic pigments or filler materials, and the like, and related organic materials.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
HENKEL CORPORATIONROCKY HILL, CT938

International Classification(s)

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  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Melber, George E 232 Claudette Ct., Buffalo, NY 14043 15 203
Oswald, William A Allentown, PA 16 440
Wolinski, Leon E Cheektowaga, NY 10 140

Cited Art

Patent Info (Count) # Cites Year
 
KEMANORD AB (2)
4,397,799 Process for drying and expanding microspheres 36 1981
4,513,106 Process for expanding microspheres 24 1983

Patent Citation Ranking

Forward Cites

Patent Info (Count) # Cites Year
 
INTERNATIONAL PAPER COMPANY (10)
8,034,847 Compositions containing expandable microspheres and an ionic compound, as well as methods of making and using the same 4 2006
7,736,466 Paper substrates containing high surface sizing and low internal sizing and having high dimensional stability 4 2007
8,030,365 Compositions containing expandable microspheres and an ionic compound as well as methods of making and using the same 3 2009
8,361,571 Composition and recording sheet with improved optical properties 0 2009
8,382,945 Expandable microspheres and methods of making and using the same 0 2009
7,967,953 Paper substrates containing high surface sizing and low internal sizing and having high dimensional stability 3 2010
8,252,373 Gloss coated multifunctional printing paper 0 2010
8,317,976 Cut resistant paper and paper articles and method for making same 0 2010
8,372,243 Paper substrates containing high surface sizing and low internal sizing and having high dimensional stability 0 2011
8,377,526 Compositions containing expandable microspheres and an ionic compound, as well as methods of making and using the same 0 2011
 
SOVEREIGN HOLDINGS, LLC (8)
4,843,104 Syntactic polymer foam compositions containing microsphere fillers 18 1987
4,908,391 Opacifiers for paints and coatings 5 1988
5,011,862 Coating media containing low density composite opacifiers 18 1989
4,912,139 Preparation of opacifier intermediates 8 1989
4,898,892 Methods for preparing opaque coatings and applying the same 5 1989
4,898,894 Film forming binders containing low density composite opacifiers 5 1989
4,888,241 Low density composite opacifiers 5 1989
5,112,657 Simulated marble products 8 1990
 
HENKEL CORPORATION (5)
4,829,094 Thermoplastic microspheres 27 1987
5,180,752 Process for making dry microspheres 7 1990
5,342,689 Thermoplastic microspheres 5 1992
5,580,656 Process for drying microspheres 1 1994
7,368,167 Ultra low density thermally clad microspheres and method of making same 0 2004
 
LANTHEUS MEDICAL IMAGING, INC. (4)
6,773,696 Contrast agent comprising low density microspheres 9 2002
8,084,056 Preparation of a lipid blend and a phospholipid suspension containing the lipid blend 0 2003
6,998,107 Composition comprising low density microspheres 2 2004
7,344,705 Composition comprising low density microspheres 1 2005
 
DIXIE CONSUMER PRODUCTS LLC (3)
6,740,373 Coated paperboards and paperboard containers having improved tactile and bulk insulation properties 37 1998
6,919,111 Coated paperboards and paperboard containers having improved tactile and bulk insulation properties 41 2002
7,955,670 Paperboard containers having improved bulk insulation properties 0 2007
 
CASCO NOBEL AB (2)
5,484,815 Process for preparation of expanded thermoplastic microspheres 7 1994
5,585,119 Device for preparation of expanded thermoplastic microspheres 6 1995
 
AKZO NOBEL N.V. (1)
7,192,989 Method and expansion device for preparing expanded thermoplastic microspheres 3 2003
 
DAINICHISEIKA COLOR & CHEMICALS MFG. CO., LTD. (1)
5,753,156 Process for producing non-scattering hollow plastic balloons 4 1996
 
DOW CORNING S.A. (1)
6,194,476 Compressible silicone composition 5 1999
 
DOW GLOBAL TECHNOLOGIES INC. (1)
7,101,926 Free-flowing polymer composition 6 2004
 
ELC MANAGEMENT LLC (1)
8,383,160 Compositions comprising solid particles entrapped in collapsed polymeric microspheres, and methods of making the same 0 2011
 
HOYA CORPORATION (1)
5,128,058 Contact lens cleaner containing a microcapsular polishing agent 17 1990
 
HUBER ENGINEERED WOODS LLC (1)
7,217,458 Strength-enhanced, lightweight lignocellulosic composite board materials and methods of their manufacture 5 2003
 
INTECH SPECIALTIES CO., INC. (1)
5,202,362 Syringeable ear plug molding putty composition 8 1991
 
JAPAN FILLITE CO., LTD. (1)
6,225,361 Expanded hollow micro sphere composite beads and method for their production 11 2000
 
JET PLASTICS, INC. (1)
6,890,965 Foamed composites and methods for making same 5 2002
 
MATSUMOTO YUSHI-SEIYAKU CO., LTD. (1)
7,807,729 Heat-expanded microspheres, production process thereof, heat-expandable microspheres and application thereof 1 2004
 
MENTOR OPHATHALMICS, INC. (1)
5,026,151 Visual function tester with binocular vision testing 23 1989
 
TAKEDA PHARMACEUTICAL COMPANY LIMITED (1)
6,190,700 Production of sustained-release preparation for injection 7 1996
 
UNITED STATES GYPSUM COMPANY (1)
6,545,066 Lightweight ready-mix joint compound 14 2000
 
UNITED TECHNOLOGIES CORPORATION (1)
7,276,290 Cryogenic insulation 0 2004