GB858127A - Polymer foam modification - Google Patents
Polymer foam modificationInfo
- Publication number
- GB858127A GB858127A GB18164/57A GB1816457A GB858127A GB 858127 A GB858127 A GB 858127A GB 18164/57 A GB18164/57 A GB 18164/57A GB 1816457 A GB1816457 A GB 1816457A GB 858127 A GB858127 A GB 858127A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cell
- groups
- treatment
- foamed
- hydrolysis
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/36—After-treatment
- C08J9/38—Destruction of cell membranes
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Cell Biology (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Polyurethanes Or Polyureas (AREA)
Abstract
A foamed, open-cell, cellular polymeric polyurethane material in the form of an integrally formed 3-dimensionally reticulated structure comprises a network of strands defining the outlines of a plurality of polygons making up a plurality of polyhedrons, at least a plurality of the faces of the polyhedrons being open, and at least a portion of the linking groups in the polymer chain are selected from =C.CO.-, -O-CO.N=, =C-CO-N= and =N.CO.N= groups, the polymer being partially hydrolysed. Such material is produced by subjecting a foamed open cell polyurethane containing the specified groups to the action of a hydrolyzing agent under hydrolyzing conditions until the physical characteristics of the material are altered. Substantially all or only part of the cell faces may be removed, depending on the hydrolysis conditions. The products are believed to contain carboxyl and hydroxyl groups. The material subjected to hydrolysis may be one formed by reacting under foam-forming conditions (usually the presence of water and amine catalyst) a polyisocyanate and a polyester (which may be styrene- or oil-modified), polyether (which may contain amine residues or have been modified by reaction with an epoxide), polyesteramide or alcohol-modified urea-formaldehyde resin. Oil, wetting agent or silicone may be added. In the hydrolysis steam or hot water may be used alone or with a catalyst. Specified are enzymes such as lipase and pepsin; alkalis such as alkali metal or ammonium hydroxide, quaternary bases, amines and alkaline salts such as as trisodium phosphate; acids such as hydrochloric, sulphuric, phosphoric, toluene sulphonic and acetic acids. Figures are given which depict on an enlarged scale a typical cell before and after treatment. In a typical example a reaction product of toluene -2, 4- and -2, 6-diisocyanates and a polyester resin is converted to a foamed product by treatment with water, diethylethanolamine and polyoxyethylated vegetable oil dispersing agent. The foam is kneaded with sodium hydroxide solution at 50 DEG C. and washed and dried. A Table shows loss in weight, density, hydrophilicity and softness after various times of treatment. The products are useful as filtering devices, gas-liquid contacting devices, catalyst carriers, rug anchors, door mats, drain pads, scouring pads, sponges, insulating pads, tire liners, spacing devices, flexible partitions, draperies, upholstery padding, mattresses and pillows. Reference has been directed by the Comptroller to Specification 789,481.ALSO:A foamed, open-cell, cellular polymeric polyurethane material in the form of an integrally formed 3-dimensionally reticulated structure comprises a network of strands defining the outlines of a plurality of polygons making up a plurality of polyhedrons, at least a plurality of the faces of the polyhedrons being open, and at least a portion of the linking groups in the polymer chain are selected from =C,CO,-, -O-CO,N=, =C-CO-N= and =N,CO,N= groups, the polymer being partially hydrolysed. Such material is produced by subjecting a foamed open cell polyurethane containing the specified groups to the action of a hydrolyzing agent under hydrolysing conditions until the physical characteristics of the material are altered. Substantially all or only part of the cell faces may be removed, depending on the hydrolysis conditions. The products are believed to contain carboxyl and hydroxyl groups. The material subjected to hydrolysis may be one formed by reacting under foam-forming conditions (usually the presence of water and a minecatalyst) a polyisocyanate and a polyester (which may be styrene- or oil-modified), polyether (which may contain amine residues or have been modified by reaction with an epoxide), polyesteramide or alcohol-modified urea-formaldehyde resin. Oil, wetting agent or silicone may be added. In the hydrolysis steam or hot water may be used alone or with a catalyst. Specified are enzymes such as lipase and pepsin; alkalis such as alkali metal or ammonium hydroxide, quaternary bases, amines and alkaline salts such as trisodium phosphate; acids such as hydrochloric, sulphuric, phosphoric, toluene sulphonic and acetic acids. Drawings are given which depict on an enlarged scale a typical cell before and after treatment. In a typical example a reaction product of toluene -2,4- and -2,6- diisocyanates and a polyester resin is converted to a foamed product by treatment with water, diethylethanolamine and polyoxyethylated vegetable oil dispersing agent. The foam is kneaded with sodium hydroxide solution at 50 DEG C. and washed and dried. A Table shows loss in weight, density, hydrophilicity and softness after various times of treatment. The products are useful as filtering devices, gas-liquid contacting devices, catalyst carriers, rug anchors, door mats, drain pads, scouring pads, sponges, insulating pads, tire liners, spacing devices, flexible partitions, draperies, upholstery padding, mattresses and pillows. Reference has been directed by the Comptroller to Specification 789,481.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US858127XA | 1956-06-15 | 1956-06-15 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB858127A true GB858127A (en) | 1961-01-04 |
Family
ID=22194113
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB18164/57A Expired GB858127A (en) | 1956-06-15 | 1957-06-07 | Polymer foam modification |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB858127A (en) |
Cited By (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3228527A (en) * | 1961-05-17 | 1966-01-11 | Maremont Corp | Water separating fuel filter |
US3293174A (en) * | 1962-03-08 | 1966-12-20 | Ici Ltd | Plant and processes for the treatment of effluent and sewage |
US3306454A (en) * | 1962-09-24 | 1967-02-28 | Edmond F Webb | Fluid container with contaminantcollecting means |
US3360131A (en) * | 1964-06-15 | 1967-12-26 | Henry J Witkowski | Filter with polyurethane foam element |
US3395086A (en) * | 1963-09-11 | 1968-07-30 | Res Dev Co | Removal of moisture from organic liquid solvent |
US3410057A (en) * | 1964-01-09 | 1968-11-12 | Bernard J. Lerner | Method for gas-liquid disentrainment operations |
US3957017A (en) * | 1974-11-04 | 1976-05-18 | Syntex (U.S.A.) Inc. | Contaminant filter in a closed-loop aquaculture system |
US4072614A (en) * | 1975-02-21 | 1978-02-07 | Harris Frank N | Oil and water separators |
US4594366A (en) * | 1983-06-29 | 1986-06-10 | Union Carbide Corporation | Connected branched polyols and polyurethanes based thereon |
WO1999033641A1 (en) * | 1997-12-24 | 1999-07-08 | Molecular Geodesics, Inc. | Foam scaffold materials |
WO2003068839A1 (en) * | 2002-02-12 | 2003-08-21 | Foamex L.P. | Hydrophilic ester polyurethane foams |
WO2004058864A2 (en) * | 2002-12-23 | 2004-07-15 | Foamex L.P. | Hydrophilic ester polyurethane foams |
US6841586B2 (en) | 2002-02-12 | 2005-01-11 | Foamex, L.P. | Felted hydrophilic ester polyurethane foams |
US8202262B2 (en) | 1994-08-22 | 2012-06-19 | Kci Licensing, Inc. | Wound therapy device and related methods |
US8247466B2 (en) | 2008-04-21 | 2012-08-21 | Fxi, Inc. | Variable felted polyurethane foams for sponges and wipes |
CN116874710A (en) * | 2022-08-29 | 2023-10-13 | 江苏长顺高分子材料研究院有限公司 | Flame-retardant polyurethane rigid foam, preparation method and application thereof |
-
1957
- 1957-06-07 GB GB18164/57A patent/GB858127A/en not_active Expired
Cited By (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3228527A (en) * | 1961-05-17 | 1966-01-11 | Maremont Corp | Water separating fuel filter |
US3293174A (en) * | 1962-03-08 | 1966-12-20 | Ici Ltd | Plant and processes for the treatment of effluent and sewage |
US3306454A (en) * | 1962-09-24 | 1967-02-28 | Edmond F Webb | Fluid container with contaminantcollecting means |
US3395086A (en) * | 1963-09-11 | 1968-07-30 | Res Dev Co | Removal of moisture from organic liquid solvent |
US3410057A (en) * | 1964-01-09 | 1968-11-12 | Bernard J. Lerner | Method for gas-liquid disentrainment operations |
US3360131A (en) * | 1964-06-15 | 1967-12-26 | Henry J Witkowski | Filter with polyurethane foam element |
US3957017A (en) * | 1974-11-04 | 1976-05-18 | Syntex (U.S.A.) Inc. | Contaminant filter in a closed-loop aquaculture system |
US4072614A (en) * | 1975-02-21 | 1978-02-07 | Harris Frank N | Oil and water separators |
US4594366A (en) * | 1983-06-29 | 1986-06-10 | Union Carbide Corporation | Connected branched polyols and polyurethanes based thereon |
US8202262B2 (en) | 1994-08-22 | 2012-06-19 | Kci Licensing, Inc. | Wound therapy device and related methods |
WO1999033641A1 (en) * | 1997-12-24 | 1999-07-08 | Molecular Geodesics, Inc. | Foam scaffold materials |
WO2003068839A1 (en) * | 2002-02-12 | 2003-08-21 | Foamex L.P. | Hydrophilic ester polyurethane foams |
US6756416B2 (en) | 2002-02-12 | 2004-06-29 | Foamex L.P. | Hydrophilic ester polyurethane foams |
US6841586B2 (en) | 2002-02-12 | 2005-01-11 | Foamex, L.P. | Felted hydrophilic ester polyurethane foams |
WO2004058864A2 (en) * | 2002-12-23 | 2004-07-15 | Foamex L.P. | Hydrophilic ester polyurethane foams |
WO2004058864A3 (en) * | 2002-12-23 | 2004-09-30 | Foamex Lp | Hydrophilic ester polyurethane foams |
US8247466B2 (en) | 2008-04-21 | 2012-08-21 | Fxi, Inc. | Variable felted polyurethane foams for sponges and wipes |
CN116874710A (en) * | 2022-08-29 | 2023-10-13 | 江苏长顺高分子材料研究院有限公司 | Flame-retardant polyurethane rigid foam, preparation method and application thereof |
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