Patent US4810768A successfully refreshed from Google Patents.
US4810768A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and formulation for extending shelf life of a silicone resin
Assignee: AT&T Inc
•
Filing: 1987-09-08
•
Granted: 1989-03-07
•
Expires: 2007-09-08
Abstract
Abstract A method of extending the shelf-life of an uncured silicone resin formulation which includes a primary amine therein comprises adding an acid to the formulation in a molar quantity approximately equal to the number of moles of primary amine present in the formulation, said acid being volatile at or below the curing temperature of the resin formulation.
Inventors
- 👤 Ching P. Wong
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:22
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/46; C; C08; C08K; C08K5/00; C08K5/04; C08K5/09; C08L; C08L83/00; C08L83/04; Y; Y10; Y10S; Y10S528/00; Y10S528/901
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
77 words
A method of extending the shelf-life of an uncured heat curable silicone resin formulation which comprises a mixture of a reactant having Si-vinyl groups, with one having Si-H groups and a platinum catalyst, and a primary amine therein comprising adding an acid to the formulation in a molar quantity approximately equal to the number of moles of primary amine present in the formulation, said acid being volatile at or below the curing temperature of the resin formulation.
Claim 2
Independent Claim
77 words
A method of extending the shelf-life of an uncured heat curable silicone resin formulation which comprises a mixture of a reactant having Si-vinyl groups, with one having Si-H groups and a platinum catalyst, and a primary amine therein comprising adding an acid to the formulation in a molar quantity approximately equal to the number of moles of primary amine present in the formulation, said acid being volatile at or below the curing temperature of the resin formulation.
Claim 3
Dependent Claim
13 words
The method recited in claim 1, wherein the acid is an organic acid.
Claim 4
Dependent Claim
21 words
The method recited in claim 2, wherein the acid is selected from the group consisting of formic, acetic and propionic acids.
Claim 5
Dependent Claim
12 words
The method recited in claim 1, wherein the acid is acetic acid.
Claim 6
Dependent Claim
16 words
The method recited in claim 1 wherein the primary amine in the formulation is a dialkylaminoalkoxysilane.
Claim 7
Dependent Claim
13 words
The method recited in claim 1, wherein the primary amine is N-2-aminoethyl-3-aminopropyltrimethoxy silane.
Claim 8
Dependent Claim
23 words
The method recited in claim 5, wherein the acid is an acid selected from the group consisting of formic, acetic and propionic acid.
Claim 9
Dependent Claim
23 words
The method recited in claim 6, wherein the acid is an acid selected from the group consisting of formic, acetic and propionic acid.
Claim 10
Dependent Claim
12 words
The method recited in claim 6, wherein the acid is acetic acid.
Claim 11
Dependent Claim
12 words
The method recited in claim 1, including adding filler to the formulation.
Claim 12
Dependent Claim
68 words
An uncured, heat curable silicone resin formulation which comprises a silicone comprising a mixture of a reactant having Si-vinyl groups with one having Si-H groups and a platinum catalyst, and a primary amine-containing additive and an acid which is volatile at the curing temperature, said acid being present in a molar amount approximately equal to or slightly greater than the molar quantity of primary amine in the formulation.
Claim 13
Dependent Claim
68 words
An uncured, heat curable silicone resin formulation which comprises a silicone comprising a mixture of a reactant having Si-vinyl groups with one having Si-H groups and a platinum catalyst, and a primary amine-containing additive and an acid which is volatile at the curing temperature, said acid being present in a molar amount approximately equal to or slightly greater than the molar quantity of primary amine in the formulation.
Claim 14
Dependent Claim
15 words
The silicone resin formulation recited in claim 11, wherein the acid is an organic acid.
Claim 15
Dependent Claim
23 words
The silicone resin formulation recited in claim 12, wherein the acid is selected from the group consisting of formic, acetic and propionic acids.
Claim 16
Dependent Claim
14 words
The silicone resin formulation recited in claim 11, wherein the acid is acetic acid.
Claim 17
Dependent Claim
18 words
The silicone resin formulation recited in claim 11, wherein the primary amine in the formulation is a dialkylaminoalkoxysilane.
Claim 18
Dependent Claim
14 words
The silicone resin formulation recited claim 11, wherein the primary amine is N-2-aminoethyl-3-aminopropyl-trimethoxy silane
Claim 19
Dependent Claim
24 words
The silicone resin formation recited in claim 15, wherein the acid is an acid selected from group consisting of formic, acetic and propionic acid
Claim 20
Dependent Claim
24 words
The silicone resin formulation recited in claim 16, wherein the acid is an acid selected from group consisting of formic, acetic and propionic acid.
Claim 21
Dependent Claim
14 words
The silicone resin formulation recited in claim 16, wherein the acid is acetic acid.
Claim 22
Dependent Claim
15 words
The silicone resin formulation recited in claim 11, further comprising filler included in the formulation.
References Cited (Backward Citations)
US3674738A
Cited
US3686357A
Cited
US3678003A
Cited
US3702769A
Cited
US3923736A
Cited
US4036813A
Cited
US4248993A
Cited
US4431472A
Cited
US4515932A
Cited
US4528324A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-03-06 | 1992-09-05 | 1993-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-03-06 | 1996-09-05 | 1997-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-03-06 | 2000-09-05 | 2001-03-07 | $7700.00 | Window Closed / Lapsed |