US4440910A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Toughened cyanoacrylates containing elastomeric rubbers
Assignee: Henkel Loctite Corp
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Filing: 1982-01-18
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Granted: 1984-04-03
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Expires: 2002-01-18
Abstract
Abstract Disclosed are cyanoacrylate adhesive compositions containing elastomeric polymers as fillers. Preferred fillers are the acrylic rubbers. Filler concentration range from about 0.5-40% by weight of the composition. Beneficial results include improved toughness of the cured compositions, as measured by impact, peel and tensile strength properties, particularly after exposure elevated temperatures which would ordinarily severely degrade the adhesive strength.
Inventors
- 👤 John T. O'Connor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:55
CPC Classifications
C; C09; C09J; C09J4/00; C09J4/06; C08; C08F; C08F291/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
55 words
A curable adhesive comprising a substantially solvent-free mixture of: (a) a monomeric ester of 2-cyanoacrylic acid, and (b) about 0.5% to about 20% by weight of an elastomeric polymer selected from the group consisting of elastomeric copolymers of a lower alkene monomer and (i) acrylic acid esters (ii) methacrylic acid esters or (iii) vinyl acetate.
Claim 2
Dependent Claim
55 words
A curable adhesive comprising a substantially solvent-free mixture of: (a) a monomeric ester of 2-cyanoacrylic acid, and (b) about 0.5% to about 20% by weight of an elastomeric polymer selected from the group consisting of elastomeric copolymers of a lower alkene monomer and (i) acrylic acid esters (ii) methacrylic acid esters or (iii) vinyl acetate.
Claim 3
Dependent Claim
26 words
A composition of claim 1 wherein the elastomeric polymer is a copolymer of a lower alkene monomer with an alkyl ester of acrylic or methacrylic acid.
Claim 4
Dependent Claim
26 words
A composition of claim 1 wherein the elastomeric polymer is a copolymer of a lower alkene monomer with an alkoxy ester of acrylic or methacrylic acid.
Claim 5
Dependent Claim
20 words
A composition of claim 1 containing in addition a stabilizing amount of an acidic stabilizer and a free radical inhibitor.
Claim 6
Dependent Claim
15 words
A composition of claim 1 wherein the monomeric ester is methyl cyanoacrylate or ethyl cyanoacrylate.
Claim 7
Dependent Claim
20 words
A composition of claim 1 wherein the concentration of the elastomeric polymer is about 1.5% to about 15% by weight.
Claim 8
Dependent Claim
14 words
A composition of claim 1 wherein the elastomeric polymer is an ethylene-methyl acrylate copolymer.
Claim 9
Dependent Claim
14 words
A composition of claim 1 wherein the elastomeric polymer is an ethylene-vinyl acetate copolymer.
References Cited (Backward Citations)
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US4196271A
Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-04-03 | 1987-10-03 | 1988-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-04-03 | 1991-10-03 | 1992-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-04-03 | 1995-10-03 | 1996-04-03 | $7700.00 | Window Closed / Lapsed |