Polyorganosiloxane-based elastomer powder and method for its preparation
Abstract
A polyorganosiloxane elastomer powder having alcoholic hydroxyl group indirectly bonded to a portion of the silicon atoms in said polyorganosiloxane is preferably produced by a method which mixes a polyorganosiloxane having at least 2 hydroxyl groups, organohydrogenpolysiloxane having at lest 2 silicon-bonded hydrogen atome per molecule, curing catalyst, and alcoholic hydroxyl group-containing organosilane to give a composition, then emulsifies the composition, then brings the emulsion into a gas or liquid having a temperature higher than that of the emulsion to cure the composition and separates the cured composition from the water.
Term
Term ended
Projected expiry passed 27 February 2011, 15.6 years ago.
- Priority
- Filed
- Published
- Projected expiry
- Today
Every citation, both ways
| Document | Relation | Office | Category | Cited during |
|---|---|---|---|---|
| EP0169529A2 | Cites | European Patent Office (EPO) | A | Search report |
| EP0304946A2 | Cites | European Patent Office (EPO) | A | Search report |
| AT285170B | Cites | Austria | A | Search report |
| US4014825A | Cites | United States of America | A | Search report |
5 members in 3 offices
Priority claims3
| Document | Office | Kind | Date |
|---|---|---|---|
| 4845990 | Japan | – | |
| 4845990 | Japan | A | |
| JP19900048459 | – | – | – |
Members5
| Document | Office | Kind | |
|---|---|---|---|
| CA2036993A1 | Canada | A1 | |
| EP0444633A2 | European Patent Office (EPO) | A2 | |
| JPH03250050A | Japan | A | |
| EP0444633A3This record | European Patent Office (EPO) | A3 | |
| JP3044048B2 | Japan | B2 |
8 legal events, as the office reported them to INPADOC
Over the term
Point at a mark for the eventEvents
| Event | Code | |
|---|---|---|
| Application withdrawnWithdrawn18W | 18W | |
| Information on the status of an ep patent application or granted ep patentGrantedSTATUS: THE APPLICATION HAS BEEN WITHDRAWNSTAA | STAA | |
| First examination report despatched17Q | 17Q | |
| Request for examination filed17P | 17P | |
| Designated contracting statesAK | AK | |
| Search report despatchedORIGINAL CODE: 0009013PUAL | PUAL | |
| Designated contracting statesAK | AK | |
| Public reference made under article 153(3) epc to a published international application that has entered the european phaseORIGINAL CODE: 0009012PUAI | PUAI |
Numbers
- Publication
- 0444633
- Publication, DOCDB
- 0444633
- Publication, EPODOC
- EP0444633
- Application
- 102926
- Application, DOCDB
- 91102926
- Application, EPODOC
- EP19910102926
Titles3
- English
- Polyorganosiloxane-based elastomer powder and method for its preparation
- German
- Von Polyorganosiloxanelastomeren abgeleitetes Pulver und Verfahren zu seiner Herstellung
- French
- Poudre à base d'un élastomère de polyorganosiloxane et son procédé de préparation
Classification
- CPC, 6
- C08J3/12
- C08G77/12
- C08G77/14
- C08G77/16
- C08J2383/04
- C08L83/04
- IPC, 6
- C08L83 05
- C08G77 16
- C08J3 12
- C08K5 5419
- C08L83 04
- C08L83 06
Designated states3
- Contracting states, 3
- Germany
- France
- United Kingdom