US4615738A
Expired / Lapsed
US
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Transparent antifog compositions
Assignee: Wacker Chemical Corp
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Filing: 1985-10-07
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Granted: 1986-10-07
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Expires: 2005-10-07
Abstract
Abstract Transparent silicone compositions for treating nonporous substrates to impart antifog properties thereto comprising an aqueous solution containing hexamethylcyclotrisiloxane, an aliphatic alcohol and a surfactant.
Inventors
- 👤 Albert J. Sanders, Jr.
- 👤 Michael J. Larson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:49
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/18
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
73 words
A transparent organopolysiloxane composition comprising from 0.2 to 6 percent by weight of hexamethylcyclotrisiloxane, from 4 to 35 percent by weight of an aliphatic alcohol having from 1 to 4 carbon atoms, and from 95.8 to about 59 percent by weight of an ammonium fatty alcohol ether sulfate as a surfactant, based on the weight of hexamethylcyclotrisiloxane, alcohol and surfactant, in which the weight ratio of alcohol to hexamethylcyclotrisiloxane is at least 3:1.
Claim 2
Dependent Claim
73 words
A transparent organopolysiloxane composition comprising from 0.2 to 6 percent by weight of hexamethylcyclotrisiloxane, from 4 to 35 percent by weight of an aliphatic alcohol having from 1 to 4 carbon atoms, and from 95.8 to about 59 percent by weight of an ammonium fatty alcohol ether sulfate as a surfactant, based on the weight of hexamethylcyclotrisiloxane, alcohol and surfactant, in which the weight ratio of alcohol to hexamethylcyclotrisiloxane is at least 3:1.
Claim 3
Dependent Claim
20 words
The composition of claim 1, wherein the fatty alcohol portion of the surfactant has from 10 to 18 carbon atoms.
Claim 4
Dependent Claim
14 words
The composition of claim 1, wherein the surfactant is an ammonium lauryl ether sulfate.
Claim 5
Dependent Claim
32 words
The composition of claim 1, wherein sufficient water is added so that the hexamethylcyclotrisiloxane is present in an amount below 1 percent by weight based on the total weight of the composition.
Claim 6
Dependent Claim
112 words
A clear, transparent antifog composition comprising from 0.2 to about 6 percent by weight of hexamethylcyclotrisiloxane, an aliphatic alcohol having from 1 to 4 carbon atoms in an amount of from 4 to 35 percent by weight and an ammonium fatty alcohol ether sulfate as a surfactant in an amount of from 95 to 59 percent by weight based on the weight of the hexamethylcyclotrisiloxane, aliphatic alcohol and surfactant, in which the weight ratio of alcohol to hexamethylcyclotrisiloxane is at least 3:1, and water so that the hexamethylcyclotrisiloxane is present in the antifog composition in an amount of less than 1 percent by weight based on the total weight of the composition.
Claim 7
Dependent Claim
112 words
A clear, transparent antifog composition comprising from 0.2 to about 6 percent by weight of hexamethylcyclotrisiloxane, an aliphatic alcohol having from 1 to 4 carbon atoms in an amount of from 4 to 35 percent by weight and an ammonium fatty alcohol ether sulfate as a surfactant in an amount of from 95 to 59 percent by weight based on the weight of the hexamethylcyclotrisiloxane, aliphatic alcohol and surfactant, in which the weight ratio of alcohol to hexamethylcyclotrisiloxane is at least 3:1, and water so that the hexamethylcyclotrisiloxane is present in the antifog composition in an amount of less than 1 percent by weight based on the total weight of the composition.
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) | 1989-10-06 | 1990-04-07 | 1990-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-10-06 | 1994-04-07 | 1994-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-10-06 | 1998-04-07 | 1998-10-07 | $7700.00 | Window Closed / Lapsed |