CA1006285A - Polyureas and preparation thereof - Google Patents
Polyureas and preparation thereofInfo
- Publication number
- CA1006285A CA1006285A CA169,987A CA169987A CA1006285A CA 1006285 A CA1006285 A CA 1006285A CA 169987 A CA169987 A CA 169987A CA 1006285 A CA1006285 A CA 1006285A
- Authority
- CA
- Canada
- Prior art keywords
- polyureas
- preparation
- 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
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/20—Macromolecular organic compounds
- D21H17/33—Synthetic macromolecular compounds
- D21H17/46—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D21H17/54—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen
- D21H17/57—Polyureas; Polyurethanes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/08—Processes
- C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/30—Low-molecular-weight compounds
- C08G18/32—Polyhydroxy compounds; Polyamines; Hydroxyamines
- C08G18/3225—Polyamines
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/30—Low-molecular-weight compounds
- C08G18/32—Polyhydroxy compounds; Polyamines; Hydroxyamines
- C08G18/3225—Polyamines
- C08G18/3253—Polyamines being in latent form
- C08G18/3256—Reaction products of polyamines with aldehydes or ketones
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/83—Chemically modified polymers
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
- D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
- D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D06M15/564—Polyureas, polyurethanes or other polymers having ureide or urethane links; Precondensation products forming them
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S156/00—Adhesive bonding and miscellaneous chemical manufacture
- Y10S156/91—Bonding tire cord and elastomer: improved adhesive system
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
- Y10T156/10—Methods of surface bonding and/or assembly therefor
- Y10T156/1089—Methods of surface bonding and/or assembly therefor of discrete laminae to single face of additional lamina
- Y10T156/109—Embedding of laminae within face of additional laminae
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/249921—Web or sheet containing structurally defined element or component
- Y10T428/249924—Noninterengaged fiber-containing paper-free web or sheet which is not of specified porosity
- Y10T428/24994—Fiber embedded in or on the surface of a polymeric matrix
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2913—Rod, strand, filament or fiber
- Y10T428/2933—Coated or with bond, impregnation or core
- Y10T428/2938—Coating on discrete and individual rods, strands or filaments
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2913—Rod, strand, filament or fiber
- Y10T428/2933—Coated or with bond, impregnation or core
- Y10T428/294—Coated or with bond, impregnation or core including metal or compound thereof [excluding glass, ceramic and asbestos]
- Y10T428/2942—Plural coatings
- Y10T428/2947—Synthetic resin or polymer in plural coatings, each of different type
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2913—Rod, strand, filament or fiber
- Y10T428/2933—Coated or with bond, impregnation or core
- Y10T428/294—Coated or with bond, impregnation or core including metal or compound thereof [excluding glass, ceramic and asbestos]
- Y10T428/296—Rubber, cellulosic or silicic material in coating
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2913—Rod, strand, filament or fiber
- Y10T428/2933—Coated or with bond, impregnation or core
- Y10T428/2964—Artificial fiber or filament
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2913—Rod, strand, filament or fiber
- Y10T428/2933—Coated or with bond, impregnation or core
- Y10T428/2964—Artificial fiber or filament
- Y10T428/2965—Cellulosic
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2913—Rod, strand, filament or fiber
- Y10T428/2933—Coated or with bond, impregnation or core
- Y10T428/2964—Artificial fiber or filament
- Y10T428/2967—Synthetic resin or polymer
- Y10T428/2969—Polyamide, polyimide or polyester
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US05252793 US3892696A (en) | 1972-05-12 | 1972-05-12 | Polyureas and preparation thereof |
US284023A US3897585A (en) | 1972-05-12 | 1972-08-28 | Integral reinforced structures with a polyurea adhesive component |
US33205473 US3895166A (en) | 1972-05-12 | 1973-02-13 | Bonded reinforced structures using amine resins |
Publications (1)
Publication Number | Publication Date |
---|---|
CA1006285A true CA1006285A (en) | 1977-03-01 |
Family
ID=27400606
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA169,986A Expired CA1007150A (en) | 1972-05-12 | 1973-04-27 | Integral reinforced structures and method |
CA169,987A Expired CA1006285A (en) | 1972-05-12 | 1973-04-27 | Polyureas and preparation thereof |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA169,986A Expired CA1007150A (en) | 1972-05-12 | 1973-04-27 | Integral reinforced structures and method |
Country Status (6)
Country | Link |
---|---|
US (2) | US3892696A (en) |
JP (1) | JPS49113882A (en) |
AU (1) | AU470071B2 (en) |
CA (2) | CA1007150A (en) |
DE (2) | DE2323188A1 (en) |
GB (2) | GB1433897A (en) |
Families Citing this family (29)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
USRE29711E (en) * | 1972-05-12 | 1978-07-25 | W. R. Grace & Co. | Polyureas and preparation thereof |
US4016101A (en) * | 1973-12-10 | 1977-04-05 | W. R. Grace & Co. | Process and composition for breaking emulsions |
JPS538354B2 (en) * | 1974-02-15 | 1978-03-28 | ||
JPS538355B2 (en) * | 1974-02-15 | 1978-03-28 | ||
JPS5240674B2 (en) * | 1974-07-18 | 1977-10-13 | ||
US3993836A (en) * | 1975-03-26 | 1976-11-23 | Ashland Oil, Inc. | Bonding of rubber to reinforcing elements |
US4127516A (en) * | 1977-02-28 | 1978-11-28 | W. R. Grace & Co. | Hydrophilic polyurethane foams with good wet strength |
US4337111A (en) * | 1978-10-02 | 1982-06-29 | The United States Of America As Represented By The Secretary Of The Navy | Method of obtaining strong and durable adhesion to rubber through chemical covalent bonds |
US4465709A (en) * | 1982-06-18 | 1984-08-14 | The Goodyear Tire & Rubber Company | Method of processing tire cord fabric |
GB8705801D0 (en) * | 1987-03-11 | 1987-04-15 | Ici Plc | Injection moulding compositions |
US5104930A (en) * | 1990-02-27 | 1992-04-14 | Raychem Corporation | Polyurea gel compositions and articles therefrom |
NZ237054A (en) * | 1990-02-27 | 1993-03-26 | Raychem Corp | Crosslinked polyurea gels |
US6274041B1 (en) | 1998-12-18 | 2001-08-14 | Kimberly-Clark Worldwide, Inc. | Integrated filter combining physical adsorption and electrokinetic adsorption |
US6537614B1 (en) | 1998-12-18 | 2003-03-25 | Kimberly-Clark Worldwide, Inc. | Cationically charged coating on hydrophobic polymer fibers with poly (vinyl alcohol) assist |
AU5006700A (en) * | 1999-05-13 | 2000-12-05 | K & L Technologies, Inc. | Polyurea composition |
US6645388B2 (en) | 1999-12-22 | 2003-11-11 | Kimberly-Clark Corporation | Leukocyte depletion filter media, filter produced therefrom, method of making same and method of using same |
US6777496B2 (en) * | 2000-11-28 | 2004-08-17 | Honeywell International Inc. | Polymeric additives and polymeric articles comprising said additive |
US20060216267A1 (en) | 2002-08-20 | 2006-09-28 | Kovacs Stephen G | Hydrophobic elastomeric polymer chemistry device for inhibiting the growth of onychomycosis and urushiol-induced allergic contact dermatitis |
US7032251B2 (en) * | 2002-12-10 | 2006-04-25 | Kimberly-Clark Worldwide, Inc. | Crosslinking agent for coated elastomeric articles |
US20040220369A1 (en) * | 2003-05-02 | 2004-11-04 | Chen Harry (Zhong-Xiao) | Methods for preparing and applying polyurea elastomers and coatings |
US7572508B2 (en) * | 2004-07-12 | 2009-08-11 | Acushnet Company | Polyurea coatings for golf equipment |
US8378037B2 (en) * | 2007-12-26 | 2013-02-19 | Momentive Performance Materials Inc. | Moisture-curable silylated polyurea and adhesive, sealant and coating compositions containing same |
TWI519845B (en) | 2010-07-30 | 2016-02-01 | 諾華公司 | Silicone hydrogel lenses with water-rich surfaces |
HUE029018T2 (en) | 2011-10-12 | 2017-02-28 | Novartis Ag | Method for making uv-absorbing ophthalmic lenses by coating |
SG11201504763UA (en) | 2012-12-17 | 2015-07-30 | Novartis Ag | Method for making improved uv-absorbing ophthalmic lenses |
WO2015095157A1 (en) | 2013-12-17 | 2015-06-25 | Novartis Ag | A silicone hydrogel lens with a crosslinked hydrophilic coating |
EP3186070B1 (en) | 2014-08-26 | 2019-09-25 | Novartis AG | Method for applying stable coating on silicone hydrogel contact lenses |
KR102604468B1 (en) | 2015-12-15 | 2023-11-22 | 알콘 인코포레이티드 | Method for applying stable coatings on silicone hydrogel contact lenses |
HUE057348T2 (en) | 2017-12-13 | 2022-05-28 | Alcon Inc | Method for producing mps-compatible water gradient contact lenses |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2375261A (en) * | 1938-10-03 | 1945-05-08 | North American Rayon Corp | Thread and/or fabric |
US2570895A (en) * | 1947-12-01 | 1951-10-09 | Goodrich Co B F | Rubber to fabric adhesion with mixture of latex and polyamine-polyacid condensation product adhesive |
NL77602C (en) * | 1953-01-19 | 1900-01-01 | ||
US2926154A (en) * | 1957-09-05 | 1960-02-23 | Hercules Powder Co Ltd | Cationic thermosetting polyamide-epichlorohydrin resins and process of making same |
US3039889A (en) * | 1958-03-12 | 1962-06-19 | Hercules Powder Co Ltd | Water-resistant nonfibrous regenerated cellulose film and process of producing same |
US3251852A (en) * | 1959-06-15 | 1966-05-17 | Petrolite Corp | Amino polymers |
US3231412A (en) * | 1962-07-03 | 1966-01-25 | Deering Milliken Res Corp | Diepoxide containing latex coating for improving the adhesion of plural coated polyester fiber to rubber |
US3240761A (en) * | 1962-07-10 | 1966-03-15 | Hercules Powder Co Ltd | Cationic thermosetting quaternized polyamide-epichlorohydrin resins and method of preparing same |
US3247048A (en) * | 1962-09-10 | 1966-04-19 | Monsanto Co | Nitrogen prepolymers as wet and dry strength improvers for paper |
US3308007A (en) * | 1963-05-06 | 1967-03-07 | Du Pont | Treatment for improving adhesion of fibrous material to rubber |
US3338858A (en) * | 1963-10-14 | 1967-08-29 | Dow Chemical Co | Adhesive composition of styrene, butadiene, unsaturated carboxylic acid copolymer blended with epichlorohydrin-polyamide adduct |
US3462470A (en) * | 1965-06-21 | 1969-08-19 | Allied Chem | Liquid polyisocyanate compositions and process for the manufacture thereof |
GB1125836A (en) * | 1965-09-17 | 1968-09-05 | Gen Mills Inc | New derivatives of polyamines and isocyanates |
US3412054A (en) * | 1966-10-31 | 1968-11-19 | Union Carbide Corp | Water-dilutable polyurethanes |
-
1972
- 1972-05-12 US US05252793 patent/US3892696A/en not_active Expired - Lifetime
-
1973
- 1973-02-13 US US33205473 patent/US3895166A/en not_active Expired - Lifetime
- 1973-04-25 GB GB1972973A patent/GB1433897A/en not_active Expired
- 1973-04-25 GB GB1972773A patent/GB1433896A/en not_active Expired
- 1973-04-27 CA CA169,986A patent/CA1007150A/en not_active Expired
- 1973-04-27 CA CA169,987A patent/CA1006285A/en not_active Expired
- 1973-05-01 AU AU55077/73A patent/AU470071B2/en not_active Expired
- 1973-05-08 DE DE2323188A patent/DE2323188A1/en active Pending
- 1973-05-08 DE DE2323131A patent/DE2323131A1/en active Pending
-
1974
- 1974-01-23 JP JP943874A patent/JPS49113882A/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
DE2323131A1 (en) | 1973-11-22 |
CA1007150A (en) | 1977-03-22 |
AU470071B2 (en) | 1976-03-04 |
GB1433897A (en) | 1976-04-28 |
DE2323188A1 (en) | 1973-11-22 |
US3895166A (en) | 1975-07-15 |
JPS49113882A (en) | 1974-10-30 |
AU5507773A (en) | 1974-11-07 |
GB1433896A (en) | 1976-04-28 |
US3892696A (en) | 1975-07-01 |
AU5524873A (en) | 1974-11-07 |
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