DK141552B - Fremgangsmåde til fremstilling af bojelige polyurethanskum med hydrofil karakter. - Google Patents
Fremgangsmåde til fremstilling af bojelige polyurethanskum med hydrofil karakter. Download PDFInfo
- Publication number
- DK141552B DK141552B DK121672AA DK121672A DK141552B DK 141552 B DK141552 B DK 141552B DK 121672A A DK121672A A DK 121672AA DK 121672 A DK121672 A DK 121672A DK 141552 B DK141552 B DK 141552B
- Authority
- DK
- Denmark
- Prior art keywords
- weight
- ethylene oxide
- groups
- parts
- foam
- Prior art date
Links
- 238000000034 method Methods 0.000 title description 31
- 230000008569 process Effects 0.000 title description 19
- 229920005830 Polyurethane Foam Polymers 0.000 title description 16
- 239000011496 polyurethane foam Substances 0.000 title description 16
- 238000004519 manufacturing process Methods 0.000 title description 7
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 71
- 229920000570 polyether Polymers 0.000 description 63
- 229920005862 polyol Polymers 0.000 description 59
- 150000003077 polyols Chemical class 0.000 description 57
- 239000004721 Polyphenylene oxide Substances 0.000 description 55
- 239000000203 mixture Substances 0.000 description 54
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 description 48
- 239000006260 foam Substances 0.000 description 38
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 25
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 description 17
- GOOHAUXETOMSMM-UHFFFAOYSA-N Propylene oxide Chemical compound CC1CO1 GOOHAUXETOMSMM-UHFFFAOYSA-N 0.000 description 16
- 239000000047 product Substances 0.000 description 14
- IMNIMPAHZVJRPE-UHFFFAOYSA-N triethylenediamine Chemical compound C1CN2CCN1CC2 IMNIMPAHZVJRPE-UHFFFAOYSA-N 0.000 description 13
- 150000001875 compounds Chemical class 0.000 description 10
- 238000009833 condensation Methods 0.000 description 8
- 230000005494 condensation Effects 0.000 description 8
- 229920001228 polyisocyanate Polymers 0.000 description 8
- 239000005056 polyisocyanate Substances 0.000 description 8
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- 238000005259 measurement Methods 0.000 description 6
- 230000008859 change Effects 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 5
- 239000012467 final product Substances 0.000 description 5
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 5
- -1 hydroxyl compound Chemical class 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 229920001296 polysiloxane Polymers 0.000 description 5
- ZJCCRDAZUWHFQH-UHFFFAOYSA-N Trimethylolpropane Chemical compound CCC(CO)(CO)CO ZJCCRDAZUWHFQH-UHFFFAOYSA-N 0.000 description 4
- LYCAIKOWRPUZTN-UHFFFAOYSA-N ethylene glycol Natural products OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 4
- 230000006872 improvement Effects 0.000 description 4
- 229920002545 silicone oil Polymers 0.000 description 4
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 3
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 3
- 239000005977 Ethylene Substances 0.000 description 3
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 125000002947 alkylene group Chemical group 0.000 description 3
- 239000003054 catalyst Substances 0.000 description 3
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 3
- 239000003999 initiator Substances 0.000 description 3
- 229920002635 polyurethane Polymers 0.000 description 3
- 239000004814 polyurethane Substances 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 230000000717 retained effect Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- HGINCPLSRVDWNT-UHFFFAOYSA-N Acrolein Chemical group C=CC=O HGINCPLSRVDWNT-UHFFFAOYSA-N 0.000 description 2
- 241000233866 Fungi Species 0.000 description 2
- UKLDJPRMSDWDSL-UHFFFAOYSA-L [dibutyl(dodecanoyloxy)stannyl] dodecanoate Chemical compound CCCCCCCCCCCC(=O)O[Sn](CCCC)(CCCC)OC(=O)CCCCCCCCCCC UKLDJPRMSDWDSL-UHFFFAOYSA-L 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000004821 distillation Methods 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000012948 isocyanate Substances 0.000 description 2
- IQPQWNKOIGAROB-UHFFFAOYSA-N isocyanate group Chemical group [N-]=C=O IQPQWNKOIGAROB-UHFFFAOYSA-N 0.000 description 2
- 150000002513 isocyanates Chemical class 0.000 description 2
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 description 2
- 239000012429 reaction media Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- CYRMSUTZVYGINF-UHFFFAOYSA-N trichlorofluoromethane Chemical compound FC(Cl)(Cl)Cl CYRMSUTZVYGINF-UHFFFAOYSA-N 0.000 description 2
- 229940029284 trichlorofluoromethane Drugs 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 235000009581 Balanites aegyptiaca Nutrition 0.000 description 1
- FBPFZTCFMRRESA-FSIIMWSLSA-N D-Glucitol Natural products OC[C@H](O)[C@H](O)[C@@H](O)[C@H](O)CO FBPFZTCFMRRESA-FSIIMWSLSA-N 0.000 description 1
- FBPFZTCFMRRESA-JGWLITMVSA-N D-glucitol Chemical compound OC[C@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-JGWLITMVSA-N 0.000 description 1
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 description 1
- 241000102542 Kara Species 0.000 description 1
- 241001026509 Kata Species 0.000 description 1
- 241001082241 Lythrum hyssopifolia Species 0.000 description 1
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 1
- UEEJHVSXFDXPFK-UHFFFAOYSA-N N-dimethylaminoethanol Chemical compound CN(C)CCO UEEJHVSXFDXPFK-UHFFFAOYSA-N 0.000 description 1
- 239000002202 Polyethylene glycol Substances 0.000 description 1
- 230000029936 alkylation Effects 0.000 description 1
- 238000005804 alkylation reaction Methods 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 229960002887 deanol Drugs 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000012973 diazabicyclooctane Substances 0.000 description 1
- 125000005442 diisocyanate group Chemical group 0.000 description 1
- 239000012972 dimethylethanolamine Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 125000001301 ethoxy group Chemical group [H]C([H])([H])C([H])([H])O* 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- ZZUFCTLCJUWOSV-UHFFFAOYSA-N furosemide Chemical compound C1=C(Cl)C(S(=O)(=O)N)=CC(C(O)=O)=C1NCC1=CC=CO1 ZZUFCTLCJUWOSV-UHFFFAOYSA-N 0.000 description 1
- 125000003827 glycol group Chemical group 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 125000000956 methoxy group Chemical group [H]C([H])([H])O* 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 150000002780 morpholines Chemical class 0.000 description 1
- SYSQUGFVNFXIIT-UHFFFAOYSA-N n-[4-(1,3-benzoxazol-2-yl)phenyl]-4-nitrobenzenesulfonamide Chemical class C1=CC([N+](=O)[O-])=CC=C1S(=O)(=O)NC1=CC=C(C=2OC3=CC=CC=C3N=2)C=C1 SYSQUGFVNFXIIT-UHFFFAOYSA-N 0.000 description 1
- 239000000546 pharmaceutical excipient Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 229920001281 polyalkylene Polymers 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000000600 sorbitol Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
- 238000005406 washing Methods 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
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
- C08G18/4833—Polyethers containing oxyethylene units
- C08G18/4837—Polyethers containing oxyethylene units and other oxyalkylene units
-
- 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
- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
- C08G18/4804—Two or more polyethers of different physical or chemical nature
-
- 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
- C08G2110/00—Foam properties
- C08G2110/0008—Foam properties flexible
-
- 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
- C08G2110/00—Foam properties
- C08G2110/0041—Foam properties having specified density
- C08G2110/005—< 50kg/m3
-
- 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
- C08G2110/00—Foam properties
- C08G2110/0083—Foam properties prepared using water as the sole blowing agent
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 (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7108967 | 1971-03-15 | ||
| FR717108967A FR2129823B1 (cs) | 1971-03-15 | 1971-03-15 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DK141552B true DK141552B (da) | 1980-04-21 |
| DK141552C DK141552C (cs) | 1980-10-06 |
Family
ID=9073540
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DK121672AA DK141552B (da) | 1971-03-15 | 1972-03-15 | Fremgangsmåde til fremstilling af bojelige polyurethanskum med hydrofil karakter. |
Country Status (12)
| Country | Link |
|---|---|
| BE (1) | BE780287A (cs) |
| DE (1) | DE2211914C2 (cs) |
| DK (1) | DK141552B (cs) |
| ES (1) | ES400762A1 (cs) |
| FR (1) | FR2129823B1 (cs) |
| GB (1) | GB1381925A (cs) |
| IL (1) | IL38966A0 (cs) |
| IT (1) | IT957566B (cs) |
| NL (1) | NL154760B (cs) |
| NO (1) | NO134841C (cs) |
| SE (1) | SE402783B (cs) |
| TR (1) | TR16954A (cs) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4143004A (en) | 1974-10-02 | 1979-03-06 | Berol Kemi Ab | Process for the preparation of polyurethane foam |
| JPS583488B2 (ja) * | 1978-05-15 | 1983-01-21 | 株式会社ブリヂストン | 軟質ポリエ−テルポリウレタンフオ−ムの製造方法 |
| DE2916485A1 (de) * | 1979-04-24 | 1980-11-06 | Bayer Ag | Verfahren zur herstellung von elastischen formkoerpern |
| EP0022617B2 (en) * | 1979-07-11 | 1991-09-25 | Imperial Chemical Industries Plc | Polyisocyanate compositions and their use in the preparation of polyurethane foams |
| EP0044481B2 (de) * | 1980-07-21 | 1987-03-11 | Mobay Chemical Corporation | Verfahren zur Herstellung elastischer geformter Gegenstände |
| DE3942330A1 (de) * | 1989-12-21 | 1991-06-27 | Basf Ag | Verfahren zur herstellung von flexiblen polyurethan-weichschaumstoffen mit viskoelastischen, koerperschalldaempfenden eigenschaften und hierzu verwendbare polyoxyalkylen-polyol-mischungen |
| DE4202992A1 (de) * | 1992-02-03 | 1993-08-05 | Bayer Ag | Verfahren zur herstellung von elastischen, offenzelligen pur-weichschaumstoffen |
| DE4203918A1 (de) * | 1992-02-11 | 1993-08-12 | Basf Ag | Verfahren zur herstellung von fluorchlorkohlenwasserstoff-freien polyurethan-weichschaumstoffen unter verwendung von urethangruppen enthaltenden polyisocyanatmischungen auf diphenylmethan-diisocyanatbasis sowie derartige modifizierte polyisocyanatmischungen |
| CZ351996A3 (en) * | 1995-12-07 | 1997-06-11 | Shell Int Research | Polyol formulation for preparing flexible polyurethane foam similar to latex |
| US6063309A (en) * | 1998-07-13 | 2000-05-16 | Arco Chemical Technology L.P. | Dispersion polyols for hypersoft polyurethane foam |
| ES2204705T3 (es) | 1999-11-02 | 2004-05-01 | Huntsman International Llc | Procedimiento para elaborar espumas biscoelasticas, combinacion de polioles y sistema de reaccion utiles para el mismo. |
| AU2011299421B9 (en) | 2010-09-07 | 2014-03-20 | Dow Global Technologies Llc | Process for making low compression set and high airflow MDI viscoelastic polyurethane foam |
| MX363520B (es) | 2010-09-29 | 2019-03-26 | Dow Global Tech Llc Star | Proceso para hacer una espuma de poliuretano viscoelastico de conjunto de compresion bajo y alto flujo de aire. |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3441523A (en) * | 1964-11-12 | 1969-04-29 | Allied Chem | Filled cellular urethanes |
| US3457203A (en) * | 1966-04-25 | 1969-07-22 | Olin Mathieson | Hydrophilic polyurethane foams and a process for preparing them |
| FR1599727A (cs) * | 1968-08-13 | 1970-07-20 |
-
1971
- 1971-03-15 FR FR717108967A patent/FR2129823B1/fr not_active Expired
-
1972
- 1972-03-06 BE BE780287A patent/BE780287A/xx not_active IP Right Cessation
- 1972-03-08 TR TR16954A patent/TR16954A/xx unknown
- 1972-03-11 DE DE2211914A patent/DE2211914C2/de not_active Expired
- 1972-03-13 IL IL38966A patent/IL38966A0/xx unknown
- 1972-03-13 IT IT48956/72A patent/IT957566B/it active
- 1972-03-13 SE SE7203194A patent/SE402783B/xx unknown
- 1972-03-14 NL NL727203360A patent/NL154760B/xx not_active IP Right Cessation
- 1972-03-14 ES ES400762A patent/ES400762A1/es not_active Expired
- 1972-03-14 NO NO822/72A patent/NO134841C/no unknown
- 1972-03-14 GB GB1177972A patent/GB1381925A/en not_active Expired
- 1972-03-15 DK DK121672AA patent/DK141552B/da not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| IT957566B (it) | 1973-10-20 |
| NO134841B (cs) | 1976-09-13 |
| FR2129823B1 (cs) | 1974-03-01 |
| NL7203360A (cs) | 1972-09-19 |
| DK141552C (cs) | 1980-10-06 |
| FR2129823A1 (cs) | 1972-11-03 |
| NO134841C (cs) | 1976-12-21 |
| BE780287A (fr) | 1972-09-06 |
| SE402783B (sv) | 1978-07-17 |
| TR16954A (tr) | 1974-01-17 |
| DE2211914A1 (de) | 1972-10-12 |
| DE2211914C2 (de) | 1983-11-10 |
| ES400762A1 (es) | 1975-01-16 |
| GB1381925A (en) | 1975-01-29 |
| NL154760B (nl) | 1977-10-17 |
| IL38966A0 (en) | 1972-05-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DK141552B (da) | Fremgangsmåde til fremstilling af bojelige polyurethanskum med hydrofil karakter. | |
| RU2245344C2 (ru) | Способ получения полиоксиалкиленполиолов (варианты) | |
| US4118354A (en) | Polyurethane hydrogel and method for the production of the same | |
| JP4241372B2 (ja) | ポリオールブレンドの製造方法 | |
| US4282387A (en) | Process for preparing polyols | |
| US5445765A (en) | Petroleum emulsion breakers | |
| RU2089564C1 (ru) | Способ получения гидроксифункциональных полиэфиров | |
| US4029879A (en) | Process for the removal of catalysts from polyether polyols employing water and adsorbent | |
| US4169175A (en) | Removal of unreacted tolylene diisocyanate from urethane prepolymers | |
| CA2143619C (en) | Efficient diesel fuel antifoams of low silicone content | |
| NO126530B (cs) | ||
| JPH06166754A (ja) | ポリシロキサン−ポリオキシアルキレン−ブロック共重合体 | |
| US3445525A (en) | Preparation of polyethers | |
| DE2340595A1 (de) | Verfahren zur herstellung offenzelliger starrer polyaetherpolyurethan-schaumstoffe | |
| CN1938362A (zh) | 提纯聚醚多元醇以除去非挥发性杂质的方法 | |
| NO154439B (no) | Fremgangsmaate og apparat for bestemmelse av retnings-parametre i et borehull. | |
| US3594393A (en) | Use of polyurethanes as demulsifiers | |
| NO115154B (cs) | ||
| RU2336116C2 (ru) | Способ подавления вспенивания водной системы | |
| NO312093B1 (no) | Fremgangsmåte for fjerning av forurensende materiale fra vann eller fra vått, fast materiale | |
| US4503150A (en) | Polyurethane foam and a microbiological metabolizing system | |
| US3499847A (en) | Process for controlling the molecular weight of ultrahigh molecular weight oxyalkylene - containing polymers from alkylene oxides free of groups other than oxirane groups | |
| US3832301A (en) | Polymeric solvent compounds for changing the salt concentration of water | |
| CN114269804B (zh) | 软质聚氨酯泡沫的制备方法 | |
| EP0213123A1 (en) | Polyurethane foam and a microbiological metabolizing system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUP | Patent expired |