SU718014A3 - Способ получени пенопласта с изоциануратной структурой - Google Patents
Способ получени пенопласта с изоциануратной структурой Download PDFInfo
- Publication number
- SU718014A3 SU718014A3 SU752153415A SU2153415A SU718014A3 SU 718014 A3 SU718014 A3 SU 718014A3 SU 752153415 A SU752153415 A SU 752153415A SU 2153415 A SU2153415 A SU 2153415A SU 718014 A3 SU718014 A3 SU 718014A3
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- foam
- polyisocyanate
- cardboard
- board
- salt
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 9
- 239000006260 foam Substances 0.000 title abstract description 47
- ZFSLODLOARCGLH-UHFFFAOYSA-N isocyanuric acid Chemical group OC1=NC(O)=NC(O)=N1 ZFSLODLOARCGLH-UHFFFAOYSA-N 0.000 title abstract description 4
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000000203 mixture Substances 0.000 claims abstract description 12
- 229920001228 polyisocyanate Polymers 0.000 claims abstract description 9
- 239000005056 polyisocyanate Substances 0.000 claims abstract description 9
- 150000003839 salts Chemical class 0.000 claims abstract description 8
- 125000000217 alkyl group Chemical group 0.000 claims abstract description 3
- 150000001732 carboxylic acid derivatives Chemical class 0.000 claims description 9
- WPYMKLBDIGXBTP-UHFFFAOYSA-N benzoic acid Chemical compound OC(=O)C1=CC=CC=C1 WPYMKLBDIGXBTP-UHFFFAOYSA-N 0.000 claims 1
- 229910052799 carbon Inorganic materials 0.000 claims 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 claims 1
- 229910000831 Steel Inorganic materials 0.000 abstract description 9
- 239000010959 steel Substances 0.000 abstract description 9
- 229920005862 polyol Polymers 0.000 abstract description 6
- 150000003077 polyols Chemical class 0.000 abstract description 6
- 239000004604 Blowing Agent Substances 0.000 abstract description 5
- 229910019142 PO4 Inorganic materials 0.000 abstract description 5
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 abstract description 5
- 239000010452 phosphate Substances 0.000 abstract description 5
- 229920000728 polyester Polymers 0.000 abstract description 5
- -1 polymethylene Polymers 0.000 abstract description 5
- 238000005507 spraying Methods 0.000 abstract description 5
- SVYKKECYCPFKGB-UHFFFAOYSA-N N,N-dimethylcyclohexylamine Chemical compound CN(C)C1CCCCC1 SVYKKECYCPFKGB-UHFFFAOYSA-N 0.000 abstract description 4
- 238000009472 formulation Methods 0.000 abstract description 4
- 239000007983 Tris buffer Substances 0.000 abstract description 3
- 125000003118 aryl group Chemical group 0.000 abstract description 3
- 239000010425 asbestos Substances 0.000 abstract description 3
- 239000003054 catalyst Substances 0.000 abstract description 3
- 229910052895 riebeckite Inorganic materials 0.000 abstract description 3
- 239000004094 surface-active agent Substances 0.000 abstract description 3
- 239000003063 flame retardant Substances 0.000 abstract description 2
- 239000010440 gypsum Substances 0.000 abstract description 2
- 229910052602 gypsum Inorganic materials 0.000 abstract description 2
- 239000002655 kraft paper Substances 0.000 abstract description 2
- 239000002184 metal Substances 0.000 abstract description 2
- 229910052751 metal Inorganic materials 0.000 abstract description 2
- 239000000123 paper Substances 0.000 abstract description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 abstract description 2
- 239000011120 plywood Substances 0.000 abstract description 2
- 229920006389 polyphenyl polymer Polymers 0.000 abstract description 2
- 229920001296 polysiloxane Polymers 0.000 abstract description 2
- CYRMSUTZVYGINF-UHFFFAOYSA-N trichlorofluoromethane Chemical compound FC(Cl)(Cl)Cl CYRMSUTZVYGINF-UHFFFAOYSA-N 0.000 abstract description 2
- 229940029284 trichlorofluoromethane Drugs 0.000 abstract description 2
- 239000002023 wood Substances 0.000 abstract description 2
- 229920000642 polymer Polymers 0.000 abstract 3
- AYCPWULCTAQDNZ-UHFFFAOYSA-M 2-ethylhexanoate;tetramethylazanium Chemical compound C[N+](C)(C)C.CCCCC(CC)C([O-])=O AYCPWULCTAQDNZ-UHFFFAOYSA-M 0.000 abstract 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 abstract 1
- 239000004721 Polyphenylene oxide Substances 0.000 abstract 1
- GOOHAUXETOMSMM-UHFFFAOYSA-N Propylene oxide Chemical compound CC1CO1 GOOHAUXETOMSMM-UHFFFAOYSA-N 0.000 abstract 1
- 239000002253 acid Substances 0.000 abstract 1
- 239000003795 chemical substances by application Substances 0.000 abstract 1
- FLBJFXNAEMSXGL-UHFFFAOYSA-N het anhydride Chemical compound O=C1OC(=O)C2C1C1(Cl)C(Cl)=C(Cl)C2(Cl)C1(Cl)Cl FLBJFXNAEMSXGL-UHFFFAOYSA-N 0.000 abstract 1
- 229920000570 polyether Polymers 0.000 abstract 1
- 239000007921 spray Substances 0.000 abstract 1
- 239000011493 spray foam Substances 0.000 abstract 1
- 239000000758 substrate Substances 0.000 description 7
- 229920006395 saturated elastomer Polymers 0.000 description 6
- 230000000704 physical effect Effects 0.000 description 5
- 230000032683 aging Effects 0.000 description 3
- 150000003863 ammonium salts Chemical class 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 238000006006 cyclotrimerization reaction Methods 0.000 description 3
- 230000009970 fire resistant effect Effects 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- QEMXHQIAXOOASZ-UHFFFAOYSA-N tetramethylammonium Chemical compound C[N+](C)(C)C QEMXHQIAXOOASZ-UHFFFAOYSA-N 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- 229920000538 Poly[(phenyl isocyanate)-co-formaldehyde] Polymers 0.000 description 2
- 239000012948 isocyanate Substances 0.000 description 2
- 150000002513 isocyanates Chemical class 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 239000013638 trimer Substances 0.000 description 2
- QSPMXWIFLDIBGD-UHFFFAOYSA-N (2RS,3SR,4E,8E)-1-O-(beta-D-glucopyranosyl)-3-hydroxy-2-{[(2SR,3E)-2-hydroxy-3-octadecenoyl]amino}-9-methyloctadeca-4,8-diene Natural products CCCCCCCCCCCCCCC=CC(O)C(=O)NC(C(O)C=CCCC=C(C)CCCCCCCCC)COC1OC(CO)C(O)C(O)C1O QSPMXWIFLDIBGD-UHFFFAOYSA-N 0.000 description 1
- HPZJMUBDEAMBFI-WTNAPCKOSA-N (D-Ala(2)-mephe(4)-gly-ol(5))enkephalin Chemical compound C([C@H](N)C(=O)N[C@H](C)C(=O)NCC(=O)N(C)[C@@H](CC=1C=CC=CC=1)C(=O)NCCO)C1=CC=C(O)C=C1 HPZJMUBDEAMBFI-WTNAPCKOSA-N 0.000 description 1
- UPMLOUAZCHDJJD-UHFFFAOYSA-N 4,4'-Diphenylmethane Diisocyanate Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=C(N=C=O)C=C1 UPMLOUAZCHDJJD-UHFFFAOYSA-N 0.000 description 1
- 241000282421 Canidae Species 0.000 description 1
- 241001275954 Cortinarius caperatus Species 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 241001307210 Pene Species 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000002671 adjuvant Substances 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 239000000908 ammonium hydroxide Substances 0.000 description 1
- 125000004429 atom Chemical group 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 238000009439 industrial construction Methods 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- IQPQWNKOIGAROB-UHFFFAOYSA-N isocyanate group Chemical group [N-]=C=O IQPQWNKOIGAROB-UHFFFAOYSA-N 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 239000004644 polycyanurate Substances 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 125000001453 quaternary ammonium group Chemical group 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 150000005621 tetraalkylammonium salts Chemical class 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- 238000005829 trimerization reaction Methods 0.000 description 1
- ASLWPAWFJZFCKF-UHFFFAOYSA-N tris(1,3-dichloropropan-2-yl) phosphate Chemical compound ClCC(CCl)OP(=O)(OC(CCl)CCl)OC(CCl)CCl ASLWPAWFJZFCKF-UHFFFAOYSA-N 0.000 description 1
- NYNPLYRPEZAJHN-UHFFFAOYSA-N tris(1-chloropropyl) phosphate Chemical compound CCC(Cl)OP(=O)(OC(Cl)CC)OC(Cl)CC NYNPLYRPEZAJHN-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- C08G18/09—Processes comprising oligomerisation of isocyanates or isothiocyanates involving reaction of a part of the isocyanate or isothiocyanate groups with each other in the reaction mixture
- C08G18/092—Processes comprising oligomerisation of isocyanates or isothiocyanates involving reaction of a part of the isocyanate or isothiocyanate groups with each other in the reaction mixture oligomerisation to isocyanurate groups
-
- 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
- C08G18/16—Catalysts
- C08G18/18—Catalysts containing secondary or tertiary amines or salts thereof
- C08G18/1816—Catalysts containing secondary or tertiary amines or salts thereof having carbocyclic groups
-
- 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
- C08G18/16—Catalysts
- C08G18/18—Catalysts containing secondary or tertiary amines or salts thereof
- C08G18/1875—Catalysts containing secondary or tertiary amines or salts thereof containing ammonium salts or mixtures of secondary of tertiary amines and acids
-
- 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
- Y10S521/00—Synthetic resins or natural rubbers -- part of the class 520 series
- Y10S521/902—Cellular polymer containing an isocyanurate structure
-
- 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
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31547—Of polyisocyanurate
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Polyurethanes Or Polyureas (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US05/486,828 US3989651A (en) | 1974-07-09 | 1974-07-09 | Catalyst for sprayable polyisocyanurate foam composition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU718014A3 true SU718014A3 (ru) | 1980-02-25 |
Family
ID=23933388
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU752153415A SU718014A3 (ru) | 1974-07-09 | 1975-07-09 | Способ получени пенопласта с изоциануратной структурой |
Country Status (11)
| Country | Link |
|---|---|
| US (1) | US3989651A (enExample) |
| JP (1) | JPS5131795A (enExample) |
| BE (1) | BE831159A (enExample) |
| CA (1) | CA1037649A (enExample) |
| DD (1) | DD120035A5 (enExample) |
| DE (1) | DE2527241B2 (enExample) |
| ES (1) | ES439265A1 (enExample) |
| GB (1) | GB1489819A (enExample) |
| IT (1) | IT1040706B (enExample) |
| SU (1) | SU718014A3 (enExample) |
| ZA (1) | ZA753844B (enExample) |
Families Citing this family (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53140730U (enExample) * | 1977-04-11 | 1978-11-07 | ||
| US4136240A (en) * | 1978-03-13 | 1979-01-23 | Texaco Development Corporation | Metallic quaternary ammonium carboxylates as polyisocyanurate catalysts |
| US4198316A (en) * | 1978-04-18 | 1980-04-15 | Gaf Corporation | Foaming composition for textile finishing and coatings |
| JPS54167548U (enExample) * | 1978-05-17 | 1979-11-26 | ||
| DE2834119C2 (de) * | 1978-08-03 | 1981-01-15 | Bayer Ag, 5090 Leverkusen | Verfahren zur Herstellung von Organopolysiloxanformmassen, die feinporige, gummielastische Formschaumkörper ergeben |
| US4503226A (en) * | 1984-04-30 | 1985-03-05 | Olin Corporation | Process for trimerizing organic polyisocyanates |
| CA1288546C (en) * | 1986-11-14 | 1991-09-03 | Ragui Ghali | Foam, composition and method of production |
| GB2217631A (en) * | 1988-03-31 | 1989-11-01 | Westinghouse Electric Corp | Method for attenuating gas diffusion through a structure |
| US4981880A (en) * | 1988-09-23 | 1991-01-01 | The Dow Chemical Company | Process for making low density flexible polyisocyanurate-polyurethane foams |
| JPH0699533B2 (ja) * | 1988-11-24 | 1994-12-07 | アキレス株式会社 | ウレタン変性ポリイソシアヌレートフォームの製造方法 |
| DE10033099A1 (de) * | 2000-07-07 | 2002-01-17 | Degussa | Verfahren zur Herstellung von geruchsarmen und lagerstabilen monomerhaltigen Polyisocyanuraten aus Isophorondiisocyanat |
| WO2003020785A1 (en) * | 2001-08-31 | 2003-03-13 | Daihachi Chemical Industry Co., Ltd. | Composition for production of flame-retardant flexible polyurethane foams |
| US7855240B2 (en) * | 2003-08-20 | 2010-12-21 | Basf Corporation | Formulated resin component for use in spray-in-place foam system to produce a low density polyurethane foam |
| US7402277B2 (en) * | 2006-02-07 | 2008-07-22 | Exxonmobil Research And Engineering Company | Method of forming metal foams by cold spray technique |
| US8580864B2 (en) | 2006-05-04 | 2013-11-12 | Air Products And Chemicals, Inc. | Trimer catalysts with improved processability and surface cure |
| US8552077B2 (en) | 2006-05-04 | 2013-10-08 | Air Products And Chemicals, Inc. | Trimer catalyst additives for improving foam processability |
| US8530534B2 (en) * | 2006-05-04 | 2013-09-10 | Air Products And Chemicals, Inc. | Trimerization catalysts from sterically hindered salts |
| US8445555B2 (en) * | 2006-07-13 | 2013-05-21 | Air Products And Chemicals, Inc. | Stabilized carbanions as trimerization catalysts |
| US20080312351A1 (en) * | 2007-06-13 | 2008-12-18 | Air Products And Chemicals, Inc. | Tetraalkylammonium Carboxylate Salts as Trimerization Catalysts for Spray Foam Applications |
| JP2019064263A (ja) * | 2017-10-04 | 2019-04-25 | 株式会社エフコンサルタント | 断熱積層体 |
| JP7717683B2 (ja) | 2019-09-04 | 2025-08-04 | エボニック オペレーションズ ゲーエムベーハー | 相関移動活性三量体化触媒塩 |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2779689A (en) * | 1955-07-19 | 1957-01-29 | Pittsburgh Plate Glass Co | Forming foamed polyurethane resins |
| BE587687A (enExample) * | 1959-01-17 | |||
| GB1155768A (en) * | 1966-02-18 | 1969-06-18 | Nisshin Boseki Kabushiki Kaish | Flame Resistant, Rigid Foams and a method for the preparation of the same |
| DE1667309C3 (de) * | 1967-01-19 | 1978-10-26 | Takeda Chemical Industries, Ltd., Osaka (Japan) | Verfahren zur Herstellung von Isocyanattrimere!! |
| US3745133A (en) * | 1968-02-05 | 1973-07-10 | Upjohn Co | Cellular isocyanurate containing polymers |
| US3849349A (en) * | 1971-05-12 | 1974-11-19 | K Frisch | Polyisocyanurate foam and process for producing the same |
| US3816339A (en) * | 1972-02-22 | 1974-06-11 | Abbott Lab | Urethane catalyst |
| US3892687A (en) * | 1973-07-09 | 1975-07-01 | Air Prod & Chem | Quaternary hydroxyalkyl tertiary amine bases as poluyrethane catalysts |
-
1974
- 1974-07-09 US US05/486,828 patent/US3989651A/en not_active Expired - Lifetime
-
1975
- 1975-06-04 GB GB2408975A patent/GB1489819A/en not_active Expired
- 1975-06-05 CA CA228,588A patent/CA1037649A/en not_active Expired
- 1975-06-16 ZA ZA00753844A patent/ZA753844B/xx unknown
- 1975-06-19 DE DE2527241A patent/DE2527241B2/de not_active Withdrawn
- 1975-06-24 IT IT5020775A patent/IT1040706B/it active
- 1975-07-04 DD DD18709775A patent/DD120035A5/xx unknown
- 1975-07-08 JP JP8390875A patent/JPS5131795A/ja active Granted
- 1975-07-09 ES ES439265A patent/ES439265A1/es not_active Expired
- 1975-07-09 BE BE158117A patent/BE831159A/xx not_active IP Right Cessation
- 1975-07-09 SU SU752153415A patent/SU718014A3/ru active
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5216760B2 (enExample) | 1977-05-11 |
| DE2527241B2 (de) | 1978-04-27 |
| USB486828I5 (enExample) | 1976-03-02 |
| US3989651A (en) | 1976-11-02 |
| ZA753844B (en) | 1976-05-26 |
| JPS5131795A (en) | 1976-03-18 |
| ES439265A1 (es) | 1977-03-01 |
| CA1037649A (en) | 1978-08-29 |
| BE831159A (fr) | 1976-01-09 |
| GB1489819A (en) | 1977-10-26 |
| DD120035A5 (enExample) | 1976-05-20 |
| DE2527241A1 (de) | 1976-02-05 |
| IT1040706B (it) | 1979-12-20 |
| AU8220975A (en) | 1976-12-23 |
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