US3961966A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cyanoacrylate adhesives
Assignee: Bayer Pharma AG
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Filing: 1974-09-27
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Granted: 1976-06-08
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Expires: 1994-09-27
Abstract
Abstract Adhesive compositions comprising an ester of α-cyanacrylic acid of the formula ##EQU1## plasticized by the presence therein of a lactone such as γ-butyrolactone, ε-caprolactone, or cumarin.
Inventors
- 👤 Bernd Brinkmann
- 👤 Wolfgang Imoehl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:00
CPC Classifications
C; C09; C09J; C09J4/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
61 words
An adhesive composition comprising an ester of α-cyanacrylic acid of the formula ##EQU4## wherein R is hydrocarbon having 1 to 10 carbon atoms, plasticized by the presence in said composition of 5 to 50 percent by weight of a monocyclic or bi-cyclic lactone having from 3 to 20 carbon atoms and having from 4 to 7 members in the lactone ring.
Claim 2
Dependent Claim
61 words
An adhesive composition comprising an ester of α-cyanacrylic acid of the formula ##EQU4## wherein R is hydrocarbon having 1 to 10 carbon atoms, plasticized by the presence in said composition of 5 to 50 percent by weight of a monocyclic or bi-cyclic lactone having from 3 to 20 carbon atoms and having from 4 to 7 members in the lactone ring.
Claim 3
Dependent Claim
22 words
An adhesive composition as in claim 1 wherein said lactone is present in an amount between 10 and 30 percent by weight.
Claim 4
Dependent Claim
40 words
An adhesive composition as in claim 1 wherein said lactone has the formula ##EQU5## wherein R 1 and R 2 are the same or different and are hydrogen or alkyl, and n is an integer from 2 to 5 inclusive.
Claim 5
Dependent Claim
21 words
An adhesive composition as in claim 1 wherein said lactone is selected from the group consisting of γ-butyrolactone, ε-caprolactone, and cumarin.
Claim 6
Dependent Claim
14 words
An adhesive composition as in claim 1 wherein said lactone is a bi-cyclic lactone.
Claim 7
Dependent Claim
15 words
An adhesive composition as in claim 5 wherein said bi-cyclic lactone is heptodilactone or dimethylheptodilactone.
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) | 1979-06-08 | 1979-12-08 | 1980-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-08 | 1983-12-08 | 1984-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-08 | 1987-12-08 | 1988-06-08 | $7700.00 | Window Closed / Lapsed |