Patent US4477607A successfully refreshed from Google Patents.
US4477607A
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Thixotropic cyanoacrylate compositions
Assignee: LOCITE Corp 705 NORTH MOUNTAIN ROAD NEWINGTON CT 06111 A CORP OF CT
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Filing: 1983-08-31
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Granted: 1984-10-16
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Expires: 2003-08-31
Abstract
Abstract Cyanoacrylate compositions which employ fumed silicas treated with polydimethylsiloxane or trialkoxyalkylsilane are stable and exhibit an unexpectedly high thixotropic ratio. Such compositions are useful in adhesive applications or, when stabilized so as to prevent polymerization in contact with moisture, in latent fingerprint developing applications.
Inventors
- 👤 Alan E. Litke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:37
CPC Classifications
C; C09; C09J; C09J4/00; A; A61; A61B; A61B5/00; A61B5/117; A61B5/1171; A61B5/1172; C09J4/06
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
62 words
In a composition comprising an α-cyanoacrylate ester monomer and a thixotropic agent, the improvement comprising that said composition is a non-flowable gel, said thixotropic agent is present in an amount of 12% or less and is a fumed silica having a surface treated with a trialkoxyalkylsilane and the said composition has a 2.5 RPM Brookfield viscosity of about 1×10 5 or greater.
Claim 2
Dependent Claim
62 words
In a composition comprising an α-cyanoacrylate ester monomer and a thixotropic agent, the improvement comprising that said composition is a non-flowable gel, said thixotropic agent is present in an amount of 12% or less and is a fumed silica having a surface treated with a trialkoxyalkylsilane and the said composition has a 2.5 RPM Brookfield viscosity of about 1×10 5 or greater.
Claim 3
Dependent Claim
14 words
A composition as in claim 1 wherein the silica surface is treated with trimethoxyoctylsilane.
Claim 4
Dependent Claim
14 words
A composition as in claim 1 comprising an organic polymer dissolved in said monomer.
Claim 5
Dependent Claim
21 words
A composition as in claim 3 wherein said polymer is selected from polyvinyl acetate polymers and copolymers, polyacrylates, polymethacrylates and polycyanoacrylates.
Claim 6
Dependent Claim
16 words
A composition as in claim 1 stabilized so as to be nonpolymerizable on contact with moisture.
Claim 7
Dependent Claim
20 words
A composition as in claim 3 wherein said polymer is present at levels of between 1 and 15% by weight.
Claim 8
Dependent Claim
20 words
A composition as in claim 6 wherein said polymer is present at levels of between 3 and 10% by weight.
Claim 9
Dependent Claim
11 words
A composition as in claim 7 wherein said polymer is polymethylmethacrylate.
Claim 10
Dependent Claim
21 words
A composition as in claim 1 wherein said silica is present in an amount between about 4 and 8% by weight.
Claim 11
Dependent Claim
19 words
A composition as in claim 9 wherein said silica is present in an amount of about 6% by weight.
References Cited (Backward Citations)
US3607542A
Cited
US3896077A
Cited
US3839065A
Cited
US3663501A
Cited
US4076685A
Cited
US3940362A
Cited
US4102945A
Cited
US4180913A
Cited
US4180911A
Cited
US4320047A
Cited
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 |