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US3742018A
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Cyanoacrylate adhesive composition
Assignee: Henkel Loctite Ireland Ltd
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Filing: 1970-04-14
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Granted: 1973-06-26
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Expires: 1990-04-14
Abstract
Abstract Rapidly curing adhesive compositions are composed of monomeric esters of 2-cyanoacrylic acid (CH2=C(CN)CO2R), stabilized by an organic sultone (-CS(02)0C-).
Inventors
- 👤 Sullivan D O
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:23
CPC Classifications
C; C09; C09J; C09J4/00; C08; C08F; C08F265/00; C08F265/04; C09J4/06
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
23 words
The composition of claim 1 wherein the sultone comprises from about 0.1 percent to about 2 percent by weight of the adhesive composition.
Claim 2
Dependent Claim
17 words
The composition of claim 1 wherein R is selected from C1 to C5 alkyl and cyclohexyl groups.
Claim 3
Dependent Claim
24 words
The composition of claim 3 wherein sufficient sultone is present to produce a pH in the adhesive composition between about 3 and about 6.
Claim 4
Dependent Claim
13 words
The composition of claim 3, additionally containing an inhibitor of free radical polymerization.
Claim 5
Dependent Claim
17 words
The composition of claim 2 wherein R is selected from C1 to C5 alkyl and cyclohexyl groups.
Claim 6
Dependent Claim
15 words
The composition of claim 2, additionally containing between 0.001 percent and 1.0% by weight hydroquinone.
Claim 7
Dependent Claim
14 words
The composition of claim 1 having a viscosity between about 25 and 150 centipoise.
Claim 8
Dependent Claim
17 words
The composition of claim 1 wherein the monomeric ester is methyl-2-cyanoacrylate and the sultone is propane sultone.
Claim 9
Dependent Claim
23 words
The composition of claim 3 wherein the sultone is selected from the class consisting of propane sultone; 1,8-naphthosultone; monochlorotolyl sultone; and 3,3'',5,5''-tetrabromophenol sulfonephthalein.
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) | 1976-06-25 | 1976-12-25 | 1977-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-25 | 1980-12-25 | 1981-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-25 | 1984-12-25 | 1985-06-26 | $7700.00 | Window Closed / Lapsed |