Stock material or miscellaneous articles – Web or sheet containing structurally defined element or... – Composite having voids in a component
Patent
1998-05-29
1999-02-09
Foelak, Morton
Stock material or miscellaneous articles
Web or sheet containing structurally defined element or...
Composite having voids in a component
521 62, 521 63, 521 64, 521 65, 521 70, 604358, 604369, B32B 326
Patent
active
058691715
ABSTRACT:
The present invention relates to a HIPE-derived heterogeneous polymeric foam structure of interconnected open-cells, wherein the foam structure has at least two distinct regions. Such heterogeneous foams have various applications, such as energy and fluid absorption, insulation, and filtration.
The invention further relates to a heterogeneous absorbent polymeric foam that, upon contact with aqueous fluids (in particular body fluids such as urine and blood), can acquire, distribute, and store these fluids.
The foams of the invention have at least two distinct regions having different density, polymer composition, surface properties, and/or microcellular morphology.
The invention further relates to a process for obtaining the heterogeneous foams by polymerizing a high internal phase water-in-oil emulsion, or HIPE. In one aspect, the process utilizes at least two distinct HIPEs, with each emulsion having a relatively small amount of an oil phase and a relatively greater amount of a water phase.
REFERENCES:
patent: 3255127 (1966-06-01), Leverkusen et al.
patent: 3256219 (1966-06-01), Will
patent: 3431911 (1969-03-01), Meisel, Jr.
patent: 3565817 (1971-02-01), Lissant
patent: 3734867 (1973-05-01), Will
patent: 3763056 (1973-10-01), Will
patent: 4522953 (1985-06-01), Barby et al.
patent: 4611014 (1986-09-01), Jones et al.
patent: 4612334 (1986-09-01), Jones et al.
patent: 4613543 (1986-09-01), Dabi
patent: 4724242 (1988-02-01), Vassileff
patent: 4788225 (1988-11-01), Edwards et al.
patent: 4957810 (1990-09-01), Eleouet et al.
patent: 4966919 (1990-10-01), Williams Jr. et al.
patent: 4985468 (1991-01-01), Elmes et al.
patent: 5021462 (1991-06-01), Elmes et al.
patent: 5037859 (1991-08-01), Williams Jr. et al.
patent: 5149720 (1992-09-01), DesMarais et al.
patent: 5198472 (1993-03-01), DesMarais et al.
patent: 5210104 (1993-05-01), Bass et al.
patent: 5260345 (1993-11-01), DesMarais et al.
patent: 5268224 (1993-12-01), DesMarais et al.
patent: 5290820 (1994-03-01), Brownscombe et al.
patent: 5318554 (1994-06-01), Young et al.
patent: 5331015 (1994-07-01), DesMarais et al.
patent: 5336695 (1994-08-01), Nass et al.
patent: 5369137 (1994-11-01), Paquet et al.
patent: 5387207 (1995-02-01), Dyer et al.
patent: 5437823 (1995-08-01), Hetinga et al.
patent: 5500451 (1996-03-01), Goldman et al.
patent: 5550167 (1996-08-01), DesMarais
patent: 5563179 (1996-10-01), Stone et al.
Avar, et al., "Integral Skin Foams and RIM Materials", Polyurethane Handbook, 2nd. ed., G. Oertel Ed., Hanser Publishers, New York, Chapter 7, pp. 329-386 (1993).
Curtain et al., "Polymer Foam Cell Growth in Microgravity", J. Cell. Plas., vol. 28, No. 6, p. 536-556 9Nov/Dec 1992).
Lissant, K.J., "The Geometry of High-Internal-Phase Ratio Emulsions", J. of Colloid & Interface Science, vol. 22, No. 5, pp. 462-468 (Nov. 1966).
Lissant et al., "A Study of Medium and High Internal Phase Ratio Water/Polymer Emulsions", J. of Colloid & Interface Science, vol. 42, No. 1, pp. 201-108 (Jan 1973).
Lissant et al., "Structure of High Internal Phase Ratio Emulsions", J. of Colloid & Interface Science, vol. 47, No. 2, pp. 416-423 (May 1974).
LeMay et al., "Low-Density Microcellular Materials", MRS Bulletin, vol. XV, No. 12, pp. 19-45 (Dec. 1990).
LeMay, J.D., "Mechanical Structure Property Relationships of Microcellular, Low Density Foams", Mat. Res. Soc. Symp. Proc., vol. 207, pp. 21-26, (no month identified 1991).
Weber et al., "New Melamine-based Elastic Foam", Kunststoffe, vol. 75, No. 11, pp. 843-848 (Nov. 1985).
Young et al., "Preparation of multishell ICF target plastic foam cushion materials by thermally induced phase inversion processes", J. Vac. Sci. Technol., vol. 20, No. 4, pp. 1094-1097 (Apr. 1982).
Woods, G., "High Density and Flexible Foams and Microcellular Elastomers", The ICI Polyurethanes Book, Polyurethane and J. Wiley & Sons Publishers, Chpt. 5, pp. 85-100 (1987).
Low Density Cellular Plastics: Physical Basis of Behaviour, Hilyard/Cunningham, Ed., Chapman & Hall, Pub., Fig. 1.3, p. 6 (1994).
Low Density Cellular Plastics: Physical Basis of Behaviour, Hilyard/Cunningham, Ed., Chapman & Hall, Pub., Fig. 3.3, p. 59 (1994).
Handbook of Plastic Foams: Types, Properties, Manufacture and Applications, A.H. Landrock, Ed., Noyes Pub., Fig. 10, p. 57 (1995).
Handbook of Plastic Foams: Types, Properties, Manufacture and Applications, A.H. Landrock, Ed., Noyes Pub., p. 64-65 (1995).
DesMarais Thomas Allen
Dyer John Collins
Shiveley Thomas Michael
Stone Keith Joseph
Foelak Morton
Linman E. Kelly
Rasser Jacobus C.
Roof Carl J.
The Procter & Gamble & Company
LandOfFree
Heterogeneous foam materials does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Heterogeneous foam materials, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Heterogeneous foam materials will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1947214