US5140084A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silicon-containing alpha-cyanoacrylates
Assignee: ThreeBond Co Ltd
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Filing: 1991-04-24
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Granted: 1992-08-18
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Expires: 2011-04-24
Abstract
Abstract A silicon-containing alpha-cyanoacrylate, useful as an adhesive, having the general formula: ##STR1## wherein R 1 is an alkylene group containing 1 to 6 carbon atoms; and R 2 , R 3 and R 4 are each alkyl groups containing 1 to 6 carbon atoms, is disclosed. A process for preparing the silicon-containing alpha-cyanoacrylate compound is also set forth. In this process a cyanoacetate having the structural formula ##STR2## wherein R 1 , R 2 , R 3 and R 4 are as defined above, is dehydrocondensed with formaldehyde or paraformaldehyde in the presence of a basic catalyst to produce a condensation polymer. The condensation polymer is thereupon depolymerized at elevated temperature to produce the silicon-containing alpha-cyanoacrylate.
Inventors
- 👤 Hiroyuki Mikuni
- 👤 Toshiyuki Chikusa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:08
CPC Classifications
C; C09; C09J; C09J4/00; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/0803; C07F7/081
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
40 words
A silicon-containing α-cyanoacrylate represented by the following general formula: ##STR26## wherein R 1 is an alkylene group having 1 to 6 carbon atoms, and R 2 to R 4 are each an alkyl group having 1 to 6 carbon atoms.
Claim 2
Dependent Claim
40 words
A silicon-containing α-cyanoacrylate represented by the following general formula: ##STR26## wherein R 1 is an alkylene group having 1 to 6 carbon atoms, and R 2 to R 4 are each an alkyl group having 1 to 6 carbon atoms.
Claim 3
Dependent Claim
49 words
A cyanoacrylate-based adhesive composition containing as an essential component a silicon-containing α-cyanoacrylate represented by the following general formula: ##STR27## wherein R 1 is an alkylene group having 1 to 6 carbon atoms, and R 2 to R 4 are each an alkyl group having 1 to 6 carbon atoms.
Claim 4
Dependent Claim
49 words
A cyanoacrylate-based adhesive composition containing as an essential component a silicon-containing α-cyanoacrylate represented by the following general formula: ##STR27## wherein R 1 is an alkylene group having 1 to 6 carbon atoms, and R 2 to R 4 are each an alkyl group having 1 to 6 carbon atoms.
Claim 5
Dependent Claim
32 words
An adhesive composition as set forth in claim 2, further containing a conventional α-cyanoacrylate represented by the following general formula: ##STR28## wherein R 5 is a hydrocarbon group or an alkoxyhydrocarbon group.
Claim 6
Dependent Claim
30 words
An adhesive composition as set forth in claim 3, wherein said silicon-containing α-cyanoacrylate is present in an amount of 5 to 95% by weight based on the total cyanoacrylate weight.
Claim 7
Dependent Claim
109 words
A process for preparing a silicon-containing α-cyanoacrylate represented by the structural formula ##STR29## wherein R 1 is an alkylene group having 1 to 6 carbon atoms; and R 2 to R 4 are each an alkyl group having 1 to 6 carbon atoms, said process comprising dehydrocondensing a cyanoacetate having the structural formula ##STR30## wherein R 1 is an alkylene group having 1 to 6 carbon groups; and R 2 to R 4 are each an alkyl group having 1 to 6 carbon groups, with formaldehyde or paraformaldehyde in the presence of a basic catalyst wherein a condensation polymer is formed; and depolymerizing said condensation polymer at elevated temperature.
Claim 8
Dependent Claim
109 words
A process for preparing a silicon-containing α-cyanoacrylate represented by the structural formula ##STR29## wherein R 1 is an alkylene group having 1 to 6 carbon atoms; and R 2 to R 4 are each an alkyl group having 1 to 6 carbon atoms, said process comprising dehydrocondensing a cyanoacetate having the structural formula ##STR30## wherein R 1 is an alkylene group having 1 to 6 carbon groups; and R 2 to R 4 are each an alkyl group having 1 to 6 carbon groups, with formaldehyde or paraformaldehyde in the presence of a basic catalyst wherein a condensation polymer is formed; and depolymerizing said condensation polymer at elevated temperature.
References Cited (Backward Citations)
JPS61168607A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-08-18 | 1996-02-17 | 1996-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-08-18 | 2000-02-17 | 2000-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-08-18 | 2004-02-17 | 2004-08-18 | $7700.00 | Window Closed / Lapsed |