US4502889A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silicone emulsion compositions
Assignee: Momentive Performance Materials Japan LLC
•
Filing: 1983-12-19
•
Granted: 1985-03-05
•
Expires: 2003-12-19
Abstract
Abstract A silicone emulsion composition containing a reinforcing amount of alumina sol blended in an emulsion precursor obtained by emulsifying a polydiorganosiloxane having at least one silanol group per molecule, one nonionic surfactant and the remainder water.
Inventors
- 👤 Akitsugu Kurita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:16
CPC Classifications
D; D21; D21H; D21H19/00; D21H19/10; D21H19/14; D21H19/24; D21H19/32; C; C08; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
68 words
A colloidal silica free silicone emulsion composition comprising a reinforcing amount of alumina sol blended in an emulsion precursor obtained by emulsifying: (A) 1 to 80% by weight of a polydiorganosiloxane having at least one silanol group per molecule, (B) 0.1 to 20% by weight of at least one nonionic surfactant or quaternary ammonium salt surfactant or mixtures thereof, and (C) 15 to 95% by weight of water.
Claim 2
Dependent Claim
68 words
A colloidal silica free silicone emulsion composition comprising a reinforcing amount of alumina sol blended in an emulsion precursor obtained by emulsifying: (A) 1 to 80% by weight of a polydiorganosiloxane having at least one silanol group per molecule, (B) 0.1 to 20% by weight of at least one nonionic surfactant or quaternary ammonium salt surfactant or mixtures thereof, and (C) 15 to 95% by weight of water.
Claim 3
Dependent Claim
34 words
A silicone emulsion composition according to claim 1 wherein polydiorganosiloxane (A) is one which is blocked at both ends with silanol groups and has a viscosity of 50 to 1,000,000 cSt at 25° C.
Claim 4
Dependent Claim
38 words
A silicone emulsion composition according to claim 1 wherein the organic groups bonded to polydiorganosiloxane (A) include at least one carbon-functional group composed of carbon atoms, hydrogen atoms and either one or both of nitrogen and oxygen atoms.
Claim 5
Dependent Claim
39 words
A silicone emulsion composition according to claim 1 wherein the emulsion precursor obtained by the emulsification of (A), (B) and (C) is one formed by subjecting said materials to an emulsion polymerization in the presence of a polymerization catalyst.
Claim 6
Dependent Claim
17 words
A silicone emulsion composition according to claim 4 wherein potassium hydroxide is used as the polymerization catalyst.
Claim 7
Dependent Claim
49 words
A silicone emulsion composition according to claim 1 wherein the amount of the alumina sol blended is within the range of 0.5 to 100 parts by weight in terms of Al 2 O 3 contained in the alumina sol per 100 parts by weight of the diorganopolysiloxane of (A).
References Cited (Backward Citations)
US4221688A
Cited
US4427811A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-03-04 | 1988-09-03 | 1989-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-03-04 | 1992-09-03 | 1993-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-03-04 | 1996-09-03 | 1997-03-05 | $7700.00 | Window Closed / Lapsed |