US4477371A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aqueous dispersible defoamers
Assignee: Wacker Chemie AG
•
Filing: 1983-07-29
•
Granted: 1984-10-16
•
Expires: 2003-07-29
Abstract
Abstract Aqueous dispersible defoamers containing an organopolysiloxane, filler, a dispersant which is at least in part a surfactant and 2,2,4-trimethyl-1,3 diisobutyloxypentane, in which at least a portion of the organopolysiloxane contains in addition to the SiC-bonded organic radicals, SiOC-bonded radicals having at least 6 carbon atoms per radical which contain carbon and hydrogen atoms and/or carbon, hydrogen and at least 2 oxygen atoms per radical and may also contain at least one silicon atom.
Inventors
- 👤 Peter Huber
- 👤 Franz Wimmer
- 👤 Ernst Innertsberger
- 👤 Jakob Schmidlkofer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:40
CPC Classifications
B; B01; B01D; B01D19/00; B01D19/02; B01D19/04; B01D19/0404; B01D19/0409; C; C11; C11D; C11D3/00; C11D3/0005; C11D3/0026; C11D3/16; C11D3/20; C11D3/2068; C11D3/37; C11D3/3703; C11D3/373
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
82 words
An aqueous dispersible defoamer composition containing an organopolysiloxane, filler, a dispersant which is at least in part a surfactant and 2,2,4-trimethyl-1,3-diisobutyryloxypentane in an amount of from 10 to 90 percent by weight based on the weight of the organopolysiloxane, filler, dispersant and 2,2,4-trimethyl-1, 3-diisobutyryloxypentane, in which the organopolysiloxane contains SiC-bonded organic radicals and SiOC-bonded radicals having at least 6 carbon atoms per radical which are composed of carbon and hydrogen atoms or carbon, hydrogen and at least 2 oxygen atoms per radical.
Claim 2
Dependent Claim
82 words
An aqueous dispersible defoamer composition containing an organopolysiloxane, filler, a dispersant which is at least in part a surfactant and 2,2,4-trimethyl-1,3-diisobutyryloxypentane in an amount of from 10 to 90 percent by weight based on the weight of the organopolysiloxane, filler, dispersant and 2,2,4-trimethyl-1, 3-diisobutyryloxypentane, in which the organopolysiloxane contains SiC-bonded organic radicals and SiOC-bonded radicals having at least 6 carbon atoms per radical which are composed of carbon and hydrogen atoms or carbon, hydrogen and at least 2 oxygen atoms per radical.
Claim 3
Dependent Claim
17 words
The defoamer composition of claim 1, wherein the SiOC-bonded radicals also contain at least one silicon atom.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-10-16 | 1988-04-16 | 1988-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-16 | 1992-04-16 | 1992-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-16 | 1996-04-16 | 1996-10-16 | $7700.00 | Window Closed / Lapsed |