US4782101A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prevention of outgassing in polyvinylsiloxane elastomers by the use of finely divided platinum black
Assignee: Manufacturers Hanover Trust Co
•
Filing: 1987-03-25
•
Granted: 1988-11-01
•
Expires: 2007-03-25
Abstract
Abstract A polyvinylsolixane catalyst paste which comprises up to 20,000 ppm of finely divided platinum black which functions to adsorb hydrogen gas generated in the reaction of said catalyst paste when mixed with a base paste containing hydrofunctional polydimethylsiloxane, said base paste further containing a hydrophilic surfactant.
Inventors
- 👤 Duncan E. Waller
- 👤 Laurie D. Lovshe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:05
CPC Classifications
A; A61; A61K; A61K6/00; A61K6/90
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
80 words
A two component dental impression material which comprises the following: ______________________________________
CATALYST
BASE PASTE WT % PASTE WT %
______________________________________
Vinyl Polydimethyl-
10-60 Vinyl Polydi-
10-60
siloxane methylsiloxane
Hydropolydimethyl
1-10 Cyclic Vinyl 0-2
Siloxane Siloxane
Silica Filler
20-80 Chloroplatinic
0.1-5.0
Acid Complex
Liquid Petroleum
0-15 Platinum Black
0.2-20,000 ppm
Plasticizer 0-15
Filler 20-80
______________________________________ and wherein said platinum black has a surface area of about 24 M 2 /gram and a size range of about 18 to 28 Angstrom Units.
Claim 2
Dependent Claim
80 words
A two component dental impression material which comprises the following: ______________________________________
CATALYST
BASE PASTE WT % PASTE WT %
______________________________________
Vinyl Polydimethyl-
10-60 Vinyl Polydi-
10-60
siloxane methylsiloxane
Hydropolydimethyl
1-10 Cyclic Vinyl 0-2
Siloxane Siloxane
Silica Filler
20-80 Chloroplatinic
0.1-5.0
Acid Complex
Liquid Petroleum
0-15 Platinum Black
0.2-20,000 ppm
Plasticizer 0-15
Filler 20-80
______________________________________ and wherein said platinum black has a surface area of about 24 M 2 /gram and a size range of about 18 to 28 Angstrom Units.
Claim 3
Dependent Claim
23 words
The impression material of claim 1 in which the surfactant is selected from the family of polyol fatty acid esters and ethoxylated esters.
Claim 4
Dependent Claim
12 words
The impression material of claim 1 in which the surfactant comprises nonylphenoxypoly(ethyleneoxy)ethanol.
Claim 5
Dependent Claim
76 words
The impression material of claim 1 in which the surfactant comprises at least one compound selected from the group comprising: n-Dodecyl, Tetradecyl, Hexadecyl Alcohol Ethoxylate Polyethylene Glycol Monolaurate Polyethylene Glycol Dilaurate Polyethylene Glycol Monoleate Polyethylene Glycol Dioleate Polyethylene Glycol Monotallate Polyethylene Glycol Ditallate Sorbitan Monolaurate Sorbitan Monoleate Sorbitan Trioleate Sorbitan Monotallate Sorbitan Tritallate Polyethylene Glycol Glycerol Cocoeate Caprylic Triglyceride Polyoxyethylene Tridecyl Alcohol24938-91-8 Polyoxyethylene Lauryl Ether5274-68-0 Nonylphenoxypoly(ethyleneoxy)ethanol9016-45-9 Polyoxyethylene Sorbitan Monolaurate Sorbitan Monolaurate Polyoxyethylene Polysorbate Polyoxyethylene Oleyl Alcohol.
Claim 6
Dependent Claim
64 words
A cured dental impression which comprises the following composition: ______________________________________
WT %
______________________________________
Vinyl Polydimethylsiloxane
10-60
Cyclic Vinyl Siloxane
0-1
Hydropolydimethyl Siloxane
0.5-5.0
Filler 20-80
Chloroplatinic Acid Complex
0.05-2.5
Platinum Black 0.1-10,000 ppm
Plasticizer 0-15
Surfactant 1-10
______________________________________ and wherein said platinum black has a surface area of about 24 M 2 /gram and a size range of about 18 to 28 Angstrom Units.
Claim 7
Dependent Claim
64 words
A cured dental impression which comprises the following composition: ______________________________________
WT %
______________________________________
Vinyl Polydimethylsiloxane
10-60
Cyclic Vinyl Siloxane
0-1
Hydropolydimethyl Siloxane
0.5-5.0
Filler 20-80
Chloroplatinic Acid Complex
0.05-2.5
Platinum Black 0.1-10,000 ppm
Plasticizer 0-15
Surfactant 1-10
______________________________________ and wherein said platinum black has a surface area of about 24 M 2 /gram and a size range of about 18 to 28 Angstrom Units.
Claim 8
Dependent Claim
84 words
A polyvinylsiloxane catalyst paste which comprises up to 20,000 ppm of finely divided platinum black which functions to absorb hydrogen gas generated in the reaction of said catalyst paste when mixed with a base paste containing hydrofunctional polydimethylsiloxane, said base paste further containing a hydrophilic surfactant selected from the family of polyol fatty acid esters and ethoxylated esters and wherein said platinum black has a surface area of about 24 M 2 /gram and a size range of about 18 to 28 Angstrom Units.
Claim 9
Dependent Claim
84 words
A polyvinylsiloxane catalyst paste which comprises up to 20,000 ppm of finely divided platinum black which functions to absorb hydrogen gas generated in the reaction of said catalyst paste when mixed with a base paste containing hydrofunctional polydimethylsiloxane, said base paste further containing a hydrophilic surfactant selected from the family of polyol fatty acid esters and ethoxylated esters and wherein said platinum black has a surface area of about 24 M 2 /gram and a size range of about 18 to 28 Angstrom Units.
Claim 10
Dependent Claim
76 words
The composition of claim 6 in which the surfactant comprises at least one compound selected from the group consisting of: n-Dodecyl, Tetradecyl, Hexadecyl Alcohol Ethoxylate Polyethylene Glycol Monolaurate Polyethylene Glycol Dilaurate Polyethylene Glycol Monoleate Polyethylene Glycol Dioleate Polyethylene Glycol Monotallate Polyethylene Glycol Ditallate Sorbitan Monolaurate Sorbitan Monoleate Sorbitan Trioleate Sorbitan Monotallate Sorbitan Tritallate Polyethylene Glycol Glycerol Cocoeate Caprylic Triglyceride Polyoxyethylene Tridecyl Alcohol24938-91-8 Polyoxyethylene Lauryl Ether5274-68-0 Nonylphenoxypoly(ethyleneoxy)ethanol9016-45-9 Polyoxyethylene Sorbitan Monolaurate Sorbitan Monolaurate Polyoxyethylene Polysorbate Polyoxyethylene Oleyl Alcohol.
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) | 1991-11-01 | 1992-05-02 | 1992-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-11-01 | 1996-05-02 | 1996-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-11-01 | 2000-05-02 | 2000-11-01 | $7700.00 | Window Closed / Lapsed |