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| Number | Title | Issue Date |
| 6902693 | Expanded porous thermoplastic polymer membranes and method for the production thereof Open celled membranes from thermoplastic polymers are prepared from foamed polymer melts by extrusion through a die. ... | 06/07/2005 |
| 6403662 | Continuous process for manufacturing polyolefin foam beads A method for manufacturing polyolefin foam beads by a continuous process is disclosed by which the polyolefin foam beads can be produced with increased efficiency and productivity. The method comprises a step of impregnating foaming agent into polyolefin ... | 06/11/2002 |
| 6326413 | Process and apparatus for producing plastics and polymeric foam A process and apparatus for producing polyurethane foam, comprising bringing together under pressure one or more foam components and a gaseous CO2 auxiliary blowing agent and discharging the combination through a permeable discharge head in the... | 12/04/2001 |
| 6315931 | Method of producing a foamed granulate A method for producing a foamed granulate, wherein a thermoplastic synthetic material is placed in an extruder, the synthetic material is melted, a pressurized expanding agent is fed through one or several injection nozzles, the molten material enriched w... | 11/13/2001 |
| 6303667 | Foaming agents containing liquid carbon dioxide A blowing agent composition includes a blowing agent consisting of liquified carbon dioxide and 1,1-difluoroethane, or a mixture consisting of liquid carbon dioxide and at least one other liquid or pressure-liquified component selected from the group cons... | 10/16/2001 |
| 6297342 | Method and mixing head for producing a reaction mixture from an isocyanate and a higher-viscous polyol formulation The present invention is directed to an agitator-free mixing head and a method for agitator-free production of a reaction mixture from an isocyanate and a higher-viscous polyol formulation, wherein both constituents are fed to a mixing zone and mixed with... | 10/02/2001 |
| 6273347 | Pre-expanded particles of propylene resin, process for preparing the same and flow-restricting device There is provided pre-expanded particles of a propylene resin having a high expansion ratio and excellent molding adhesion without using a volatile blowing agent or increasing an expansion pressure. The pre-expanded particles of a propylene resin are prep... | 08/14/2001 |
| 6066017 | Inflatable, noncollapsible, personal flotation device The inflatable, non-collapsible, flotation device (INCFD) utilizes foam mng chemicals within a flotation chamber where the materials react and harden to form a layer of pliant foam, such as polyurethane. The foam, during reaction, conforms with the shape... | 05/23/2000 |
| 6048909 | Foams having increased heat distortion temperature made from blends of alkenyl aromatic polymers and alpha-olefin/vinyl or vinylidene aromatic and/or sterically hindered aliphatic or cycloaliphatic vinyl or vinylidene interpolymers The present invention pertains to improved alkenyl aromatic polymer foams (and processes for their preparation) having increased heat distortion temperature and improved dimensional stability while maintaining good tensile/tear, creep and environmental di... | 04/11/2000 |
| 6005013 | Gear throttle as a nucleation device in a continuous microcellular extrusion system Disclosed herein is an improvement in microcellular or supermicrocellular polymer extrusion systems. Both conventional and microcellular systems employ an extruder which plasticates polymer pellets into a polymer melt; a gas metering system, whereby a gas... | 12/21/1999 |
| 6005014 | Apparatus and process for producing polymeric foam An apparatus and process for producing polymeric foam, wherein reactive foam components and a low-boiling point frothing agent are brought together, sufficient pressure is applied to maintain the frothing agent in a liquid state and the mixture is passed ... | 12/21/1999 |
| 5889064 | Process and apparatus for producing a foamed polymer In the process and an extrusion device for producing a foamed polymer, a polymer is melted and a foaming agent is added to the polymer melt. After the polymer melt and the foaming agent have been mixed, a throttle generates a pressure drop for nucleation ... | 03/30/1999 |
| 5859081 | Process for producing froth polyurethane foam High quality, consistent polyurethane froth foams, both filled and unfilled, are prepared by directing polyol, isocyanate, and optionally other polyurethane-forming ingredients to a high pressure mix head prior to introducing the mixture to a froth foamin... | 01/12/1999 |
| 5723506 | Extruded polymer foam with filler particles and method A thermosetting foam, preferably polyisocyanurate or polyurethane foam, is prepared in an extruder which permits the incorporation of high levels of filler particles. The method includes introducing polyol, isocyanate and filler particles to an extruder s... | 03/03/1998 |
| 5656678 | Method and apparatus for the production of polyurethane foam using variable capacity trough A polyurethane foam is produced by mixing foam forming chemicals with the mixing being effected to produce an unfoamed liquid mixture and then feeding the unfoamed liquid mixture into an open-topped trough in which the liquid mixture remains for a dwell t... | 08/12/1997 |
| 5624972 | Manufacture of polymeric foams A method for the preparation of flexible polymeric foam by reacting a polyisocyanate component with an isocyanate-reactive component comprising at least 50% by weight of water, the polyisocyanate component comprising at least two polyisocyanate compositio... | 04/29/1997 |
| 5604267 | Process for producing froth polyurethane foam High quality, consistent polyurethane froth foams, both filled and unfilled, are prepared by directing polyol, isocyanate, and optionally other polyurethane-forming ingredients to a high pressure mix head prior to introducing the mixture to a froth foamin... | 02/18/1997 |
| 5578655 | Apparatus and process for the production of frothed polyurethane foams An apparatus and a process for the production of frothed polyurethane foams: the reactive polyurethane components are mixed with a liquid low-boiling blowing agent and a nucleation gas by a mechanical mixer under pressure controlled conditions in a mixing... | 11/26/1996 |
| 5521224 | Method and apparatus for controlling the number of cells in polyurethane foam The invention relates to a method and an apparatus for producing polyurethane foam with a controlled number of cells, in which a gas is dispersed in one of the components, i.e. the polyol or the isocyanate, in a dispersing device arranged between the mixi... | 05/28/1996 |
| 5475037 | Amorphous polyester foam A low density foam having a density less than 15 pounds per cubic foot (240 kg/m3) is formed from an amorphous polyethylene terephthalate polymer. An expandable resin composition is also disclosed, comprising an amorphous polyethylene terephtha... | 12/12/1995 |
| 5472990 | Method and apparatus for nucleation of polyurethane foam which results in self-adhering microcellular foam An apparatus and method for producing foam polyurethane incorporates an apparatus for mixing a nucleating gas into the polyol (part B) fraction and finally dispersing the nucleating gas prior to mixing the polyol (part B) fraction with the isocyanate (par... | 12/05/1995 |
| 5430072 | Manufacture of polymeric foams A method for the preparation of flexible polymeric foam by reacting a polyisocyanate component with an isocyanate-reactive component comprising at least 50% by weight of water, the polyisocyanate component comprising at least two polyisocyanate compositio... | 07/04/1995 |
| 5409961 | Rigid closed cell polyisocyanate based foams for use as positive flotation materials in watercraft There is now provided a rigid closed cell polyisocyanate based foam for use as a positive flotation material for watercraft which meets the U.S. Coast Guard immersion test (CGD 75-168, 33 C.F.R. .sctn.183.114). As a blowing agent for this foam, a mixture ... | 04/25/1995 |
| 5360885 | Process for the continuous production of polyurethane and polyurethane urea elastomers The present invention relates to the continuous production of polyurethane and polyurethane urea elastomers by reaction of polyisocyanates with isocyanate-reactive compounds in a mixing nozzle.... | 11/01/1994 |
| 5328938 | On-site generation of polyurethane foam using an HCFC as a sole blowing agent The present invention relates to an improved process for producing, by means of a portable foaming apparatus having a static mixer, a polyurethane foam by reacting a reaction mixture comprised of a polyol, an organic isocyanate, a foaming/frothing agent, ... | 07/12/1994 |
| 5306734 | Use of viscosity as an in-line diagnostic for high internal phase emulsion generation A lightweight absorbent foam is produced using a high internal phase emulsion (HIPE), the production of which incorporates the use of capillary viscosity measurements as an in-line diagnostic for HIPE quality. The in-line diagnostics yield measurements of... | 04/26/1994 |
| 5296517 | Process for continuous control of the cell number of polyurethane foams The process for continuous control of cell number in the production of polyurethane foams from polyols, isocyanates and water, where mixing the components is effected in a mixing head with adjustable injection pressure and adjustable mixing chamber pressu... | 03/22/1994 |
| 5264464 | On-site generation of polyurethane foam using an HCFC as a sole blowing agent The present invention relates to an improved process for producing, by means of a portable foaming apparatus having a static mixer, a polyurethane foam by reacting a reaction mixture comprised of a polyol, an organic isocyanate, a foaming/frothing agent, ... | 11/23/1993 |
| 5252627 | Apparatus and method for blending and dispensing foamable, curable organosiloxane compositions An apparatus for preparing foams exhibiting a uniformly small cell size, a minimum number of ruptured cell walls and a smooth surface from foamable curable compositions comprises means to transport the ingredients of a foamable, curable composition to the... | 10/12/1993 |
| 5223552 | Treatment of process air stream from rapid cooling of polyurethane foam A method and apparatus for the continuous production of flexible open cell polyurethane foam, where a process air stream is drawn through the interior of the foam material after it has completed its rise to thereby accelerate the cooling of the foam mater... | 06/29/1993 |
| 5157059 | Method of and apparatus for producing a foamed mass of a polyurea elastomer Through three separate passages opening in a common plane at right angles to one another into a mixing chamber, three components of a reactant polyurethane or polyurea elastomer composition to form in a mold cavity are introduced. One of the components is... | 10/20/1992 |
| 5149722 | Dispersant for carbon black-filled foam A closed cell, rigid, polymer foam comprising the reaction product of a polyisocyanate and an isocyanate-reactive compound in the presence of (a) a foaming agent, (b) at least about 2 percent by weight of carbon black, based on the weight of the polymer i... | 09/22/1992 |
| 5089190 | Method and apparatus for hollow core extrusion of high viscosity materials A method and apparatus for dispensing a foamable, pressurized solution of a gas and a high viscosity polymeric material in a manner which produces a foamed bead having a hollow core. Initial foaming occurs in a nozzle through which the solution is dispens... | 02/18/1992 |
| 5084486 | Reactive feed stream to replace inert blowing agent feed stream in a polyurethane foam process A process for manufacture of molded, high resiliency, polyurethane foam substantially free of volatile organic blowing agents comprising feeding at least three streams into a mixing device to form a reaction mixture, wherein a first stream contains (i) a ... | 01/28/1992 |
| 5079276 | Method of manufacturing polyurethane foam A method of manufacturing polyurethane foams comprising the steps of mixing a polyol and an organic isocyanate without causing them to substantially react with each other thereby to obtain a nonreacted mixture, mixing the nonreacted mixture with a foaming... | 01/07/1992 |
| 5055272 | Method for producing polyurethane foam and apparatus therefor A method of producing a polyurethane foam comprising the steps of dissolving rapidly and substantially completely a non-condensible non-reactive gas in a liquid isocyanate component or a liquid polyol component or both while the isocyanate and polyol comp... | 10/08/1991 |
| 5000882 | Apparatus for the preparation of a free-flowing mixture of free-flowing components which reacts to form foam The present invention is directed to an apparatus for introducing gas into one of at least two free-flowing components which are subsequently mixed to provide a foam-forming free-flowing mixture by transferring the component to have gas dispersed therein ... | 03/19/1991 |
| 4933115 | Process for the production of a flowable mixture which reacts to form foam from flowable components stored in storage containers The present invention relates to an improved process for the production of a flowable mixture which reacts to form foam from flowable components stored in storage containers, wherein prior to metered introduction into a mixing zone, at least one of the co... | 06/12/1990 |
| 4833175 | Mixing process Viscous liquids containing polymeric materials which will interact with one another upon contact and generate gas for foam expansion are intimately and homogeneously mixed in a very short period of time by passing them successively and continuously throug... | 05/23/1989 |
| 4795763 | Carbon black-filled foam A closed cell, rigid, polymer foam containing as filler at least about 2 percent by weight of carbon black, based on the weight of the polymer in the foam, the carbon black being uniformly dispersed throughout the foam so that there is present in the cell... | 01/03/1989 |
