US5248708A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adhesive composition consisting primarily of α-cyanoacrylate compound
Assignee: Ohara Paragium Chemical Co Ltd
•
Filing: 1992-04-10
•
Granted: 1993-09-28
•
Expires: 2012-04-10
Abstract
Abstract An α-cyanoacrylate adhesive composition including as the main components thereof: (A) an α-cyanoacrylate prepared by the process having the steps of thermally depolymerizing a condensation product obtained from a cyanoacetic acid ester, and formaldehyde or a polymer thereof using as a catalyst a polymerizable imine represented by the formula ##STR1## wherein R 1 and R 2 are the same or different and are each CH 3 or H to obtain a crude monomer, and rectifying the crude monomer, (B) a fine particulate silica having an absorbed and adsorbed water content of 0.08 to 1.30 wt % and 2.7 to 5.2 silanol groups/100 Å 2 on the surface thereof, and (C) an acid-treated (poly)-alkylene glycol.
Inventors
- 👤 Hiroshi Uemura
- 👤 Ethuo Yosida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:45
CPC Classifications
C; C09; C09J; C09J4/00; C09J4/06
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
125 words
An α-cyanoacrylate adhesive composition comprising as the main components thereof: (A) an α-cyanoacrylate prepared by the process having the steps of thermally depolymerizing a condensation product obtained from a cyanoacetic acid ester, and formaldehyde or a polymer thereof using as a catalyst a polymerizable imine represented by the formula ##STR3## wherein R 1 and R 2 are the same or different and are each CH 3 or H to obtain a crude monomer, and rectifying the crude monomer, (B) a fine particulate silica having an absorbed and adsorbed water content of 0.08 to 1.30 wt % and 2.7 to 5.2 silanol groups/100 Å 2 on the surface thereof, and (C) a polyether-modified silicone prepared by treating a silicone with a BF 3 ether complex salt.
Claim 2
Dependent Claim
125 words
An α-cyanoacrylate adhesive composition comprising as the main components thereof: (A) an α-cyanoacrylate prepared by the process having the steps of thermally depolymerizing a condensation product obtained from a cyanoacetic acid ester, and formaldehyde or a polymer thereof using as a catalyst a polymerizable imine represented by the formula ##STR3## wherein R 1 and R 2 are the same or different and are each CH 3 or H to obtain a crude monomer, and rectifying the crude monomer, (B) a fine particulate silica having an absorbed and adsorbed water content of 0.08 to 1.30 wt % and 2.7 to 5.2 silanol groups/100 Å 2 on the surface thereof, and (C) a polyether-modified silicone prepared by treating a silicone with a BF 3 ether complex salt.
Claim 3
Dependent Claim
33 words
The composition of claim 1, wherein about 0.5 weight percent of (C 2 H 5 ) 2 O.BF 3 , based on the weight of said silicone, is used to treat said silicone.
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) | 1996-09-27 | 1997-03-29 | 1997-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-09-27 | 2001-03-29 | 2001-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-09-27 | 2005-03-29 | 2005-09-28 | $7700.00 | Window Closed / Lapsed |