US Patent No: 4,778,631

Number of patents in Portfolio can not be more than 2000

Method and apparatus for foaming high viscosity polymer materials

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Abstract

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Polymer materials having viscosities ranging from about 50,000 up to above 1,000,000 centipoises are mixed with a gaseous foaming agent to provide a polymer/gas solution under pressure such that when the polymer/gas solution is subsequently dispensed at atmospheric pressure the gas is released from the solution and becomes entrapped in the polymeric material to form a homogeneous polymer foam. Mixing is accomplished by force feeding the gas and polymeric material into and through a low energy input disk mixer with a low pressure drop across the mixer such that premature foaming or reaction of the polymeric material is avoided. The disk mixer includes a tubular housing, one or more driven shafts extending along the length of the housing, and a series of disks spaced along the shafts. The foaming gas enters into solution in the polymer in the compartments between the rotating disks. The process is characterized in that relatively high viscosity polymeric materials are mixed with gas and foamed with relatively low horsepower requirements, high throughput and low temperature rise of the polymer from conversion of the work of mixing to heat.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
NORDSON CORPORATIONWESTLAKE, OH1277

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Chung, Chan I Schenectady, NY 9 120
Cobbs, Jr Walter H Amherst, OH 15 382
Huddleston, Robert J Bay Village, OH 2 69
Saidman, Laurence B Duluth, GA 93 731

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Patent Info (Count) # Cites Year
 
NORDSON CORPORATION (25)
5,082,142 Method and apparatus for applying non-chemically foamed multi-component curable polymers 9 1989
4,983,424 Method for forming a permanent foam coating by atomization onto a substrate 12 1989
5,089,190 Method and apparatus for hollow core extrusion of high viscosity materials 9 1989
5,207,352 Method and apparatus for dispensing high viscosity fluid materials 14 1991
5,197,800 Method for forming coating material formulations substantially comprised of a saturated resin rich phase 32 1991
5,215,253 Method and apparatus for forming and dispersing single and multiple phase coating material containing fluid diluent 22 1991
5,159,894 Apparatus for forming a permanent foam coating by atomization onto a substrate 2 1991
5,318,207 Method and apparatus for portable dispensing of foam material 8 1992
5,421,921 Segmented slot die for air spray of fibers 37 1992
5,418,009 Apparatus and methods for intermittently applying discrete adhesive coatings 39 1992
5,354,378 Slot nozzle apparatus for applying coatings to bottles 34 1992
5,330,783 Method and apparatus for forming and dispensing single and multiple phase coating material containing fluid diluent 25 1992
5,443,796 Method and apparatus for preventing the formation of a solid precipitate in a coating material formulation 7 1992
5,490,726 Apparatus for proportioning two components to form a mixture 10 1992
5,407,267 Method and apparatus for forming and dispensing coating material containing multiple components 27 1992
5,407,132 Method and apparatus for spraying viscous adhesives 20 1993
5,556,471 Method and apparatus for dispensing foam materials 19 1994
5,429,840 Apparatus and methods for applying discrete foam coatings 44 1994
5,409,733 Apparatus and methods for applying conformal coatings to electronic circuit boards 42 1994
5,480,589 Method and apparatus for producing closed cell foam 20 1994
5,685,911 Apparatus for intermittently applying discrete adhesive coatings 9 1995
5,524,828 Apparatus for applying discrete foam coatings 30 1995
7,762,088 Apparatus and method for dispensing discrete amounts of viscous material 2 2006
7,703,705 Apparatus and method for dispensing a mixture of a gas and a fluid material 1 2007
8,512,805 Method for dispensing foam onto substrates of large width 0 2012
 
KREIDO LABORATORIES (6)
6,787,246 Manufacture of flat surfaced composites comprising powdered fillers in a polymer matrix 0 2001
6,830,806 Methods of manufacture of electric circuit substrates and components having multiple electric characteristics and substrates and components so manufactured 0 2002
7,098,360 Processes employing multiple successive chemical reaction process steps and apparatus therefore 4 2002
6,752,529 Methods and apparatus for materials processing 35 2002
7,538,237 Process for high shear gas-liquid reactions 11 2004
7,575,728 Processes employing multiple successive chemical reaction process steps and apparatus therefore 9 2006
 
SUNSTAR SUISSE SA (3)
5,984,280 Apparatus for foaming a viscous material 5 1998
6,538,040 Method and apparatus for mixing a high-viscosity material into a gas 8 1999
7,338,980 Method and apparatus for mixing a high-viscosity material into a gas 0 2002
 
The Procter & Gamble Company (3)
5,389,168 Method of making an elastomeric adhesive foam and of elasticizing garments 24 1993
5,342,858 Elastomeric adhesive foam 32 1993
5,503,919 Garments comprising an elastomeric adhesive foam 35 1994
 
DOW CORNING CORPORATION (2)
5,252,627 Apparatus and method for blending and dispensing foamable, curable organosiloxane compositions 5 1993
5,330,724 Apparatus for blending and dispensing foamable, curable organosiloxane compositions 2 1993
 
HOLL TECHNOLOGIES COMPANY (2)
6,742,774 Process for high shear gas-liquid reactions 47 2001
6,938,687 Apparatus for transfer of heat energy between a body surface and heat transfer fluid 1 2003
 
TEKNI-PLEX, INC. (2)
5,423,607 Method for blending diverse blowing agents 19 1994
5,823,669 Method for blending diverse blowing agents 10 1995
 
3M INNOVATIVE PROPERTIES COMPANY (1)
8,536,241 (Meth)acryloyl pressure-sensitive foam adhesives 0 2011
 
BOSTIK, INC. (1)
7,059,760 Method of post mixing additives to hot melt adhesives 4 2003
 
Dow Corning Toray Silicone Co., Ltd. (1)
5,480,597 Method for blending a gas into a high viscosity liquid 15 1994
 
Holl Technologies Corporation (1)
7,165,881 Methods and apparatus for high-shear mixing and reacting of materials 15 2003
 
ILLINOIS TOOL WORKS INC. (1)
6,607,099 Air drive system 0 2001
 
Kriedo Laboratories (1)
6,994,330 Process for high shear gas-liquid reactions 1 2004
 
POLYONE CORPORATION (1)
5,472,990 Method and apparatus for nucleation of polyurethane foam which results in self-adhering microcellular foam 14 1994
 
Spraying Systems Co. (1)
8,524,327 Liquid adhesive dispensing system 0 2010
 
TOYODA GOSEI CO., LTD. (1)
5,604,300 Crosslink test method 4 1995
 
TREXEL, INC. (1)
8,137,600 Injection molding of polymeric material 3 2007
 
UNI-SUNSTAR B.V. (1)
5,874,031 Method of and apparatus for foaming a viscous material 4 1996