Method and apparatus for foaming high viscosity polymer materials

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 4778631
SERIAL NO

07036871

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ATTORNEY / AGENT: (SPONSORED)

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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, OH733

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Chung, Chan I Schenectady, NY 8 152
Cobbs, Jr Walter H Amherst, OH 15 399
Huddleston, Robert J Bay Village, OH 2 75
Saidman, Laurence B Westlake, OH 72 1022

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Patent Info (Count) # Cites Year
 
Other [Check patent profile for assignment information] (2)
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* 2005/0029,304 Method and apparatus for mixing a high-viscosity material into a gas 0 2004
 
3M INNOVATIVE PROPERTIES COMPANY (1)
8536241 (Meth)acryloyl pressure-sensitive foam adhesives 1 2011
 
PolyOne Corporation (1)
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UNI-SUNSTAR B.V. (1)
* 5874031 Method of and apparatus for foaming a viscous material 4 1996
 
The Procter & Gamble Company (3)
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Kriedo Laboratories (1)
* 6994330 Process for high shear gas-liquid reactions 2 2004
 
GRACO MINNESOTA INC. (1)
* 2013/0112,711 DIRECT AIR MOTOR DRIVEN PUMP TO DISPENSE VALVE 11 2012
 
BAYER MATERIALSCIENCE LLC (1)
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* 5480597 Method for blending a gas into a high viscosity liquid 20 1994
 
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NORDSON CORPORATION (30)
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Spraying Systems Co. (2)
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SUNSTAR SUISSE SA (4)
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6538040 Method and apparatus for mixing a high-viscosity material into a gas 10 1999
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* 2002/0132,859 Method and apparatus for mixing a high-viscosity material into a gas 0 2002
 
DOW CORNING CORPORATION (2)
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HOLL TECHNOLOGIES COMPANY (KREIDO BIOFUELS, INC.) (2)
6752529 Methods and apparatus for materials processing 65 2002
7575728 Processes employing multiple successive chemical reaction process steps and apparatus therefore 16 2006
 
Holl Technologies Corporation (1)
7165881 Methods and apparatus for high-shear mixing and reacting of materials 38 2003
 
HOLL TECHNOLOGIES COMPANY (6)
* 6742774 Process for high shear gas-liquid reactions 75 2001
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KREIDO LABORATORIES (6)
6787246 Manufacture of flat surfaced composites comprising powdered fillers in a polymer matrix 1 2001
6830806 Methods of manufacture of electric circuit substrates and components having multiple electric characteristics and substrates and components so manufactured 0 2002
7098360 Processes employing multiple successive chemical reaction process steps and apparatus therefore 4 2002
* 2004/0013,587 Processes employing multiple successive chemical reaction process steps and apparatus therefore 2 2002
7538237 Process for high shear gas-liquid reactions 30 2004
* 2005/0033,069 Process for high shear gas-liquid reactions 70 2004
* Cited By Examiner