US4582648A
Expired / Lapsed
US
⏱️ 0.0 years remaining
α-Cyanoacrylate compound, method of preparing same and adhesive comprising same
Assignee: Alpha Giken KK
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Filing: 1984-05-29
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Granted: 1986-04-15
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Expires: 2004-05-29
Abstract
Abstract alpha -cyanoacrylate compounds expressed by the following general formula: <IMAGE> wherein R1 designates -CH2- or <IMAGE> and R2 designates alkyl groups, alkenyl groups or alkynyl groups of C1 to C4. These compounds are preferably synthesized by the reaction of the compounds expressed by the following general formula: <IMAGE> wherein R1 and R2 are same as the above described, with formaldehyde products and then the depolymerization of the resulting dehydrating condensation polymers. These compounds are effectively used as fast-setting adhesives.
Inventors
- 👤 Eisuke Hirakawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:19
CPC Classifications
C; C07; C07C; C07C255/00; C09; C09J; C09J4/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
25 words
α-cyanoacrylate compounds expressed by the following general formula: ##STR20## wherein R 2 designates alkyl groups or alkenyl groups of C 2 to C 4 .
Claim 2
Dependent Claim
25 words
α-cyanoacrylate compounds expressed by the following general formula: ##STR20## wherein R 2 designates alkyl groups or alkenyl groups of C 2 to C 4 .
Claim 3
Independent Claim
66 words
A method of preparing α-cyanoacrylate compounds expressed by the following general formula: ##STR21## wherein R 2 designates alkyl groups or alkenyl groups of C 2 to C 4 , comprising a step for reacting the compounds expressed by the following general formula: ##STR22## wherein R 2 is the same as the above described, with formaldehyde products; and a step for depolymerizing the resulting dehydrating condensation polymers.
Claim 4
Independent Claim
66 words
A method of preparing α-cyanoacrylate compounds expressed by the following general formula: ##STR21## wherein R 2 designates alkyl groups or alkenyl groups of C 2 to C 4 , comprising a step for reacting the compounds expressed by the following general formula: ##STR22## wherein R 2 is the same as the above described, with formaldehyde products; and a step for depolymerizing the resulting dehydrating condensation polymers.
References Cited (Backward Citations)
US2784215A
Cited
US3995641A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-04-14 | 1989-10-14 | 1990-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-14 | 1993-10-14 | 1994-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-14 | 1997-10-14 | 1998-04-15 | $7700.00 | Window Closed / Lapsed |