US5242980A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ethylene-unsaturated alcohol or acid copolymer and epoxy crosslinker
Assignee: ExxonMobil Chemical Patents Inc
•
Filing: 1992-11-02
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Granted: 1993-09-07
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Expires: 2012-11-02
Abstract
Abstract A heat curable hot melt adhesive system is disclosed. The system uses an epoxy-crosslinking ethylene polymer component, a tackifier compatible therewith and an epoxy crosslinking agent having an epoxide functionality of at least 2. The ethylene polymer component may be either an ethylene copolymer of an α,β-ethylenically unsaturated carboxylic acid, or an ethylene copolymer of an ethylenically unsaturated alcohol used in combination with a dicarboxylic acid anhydride. The dicarboxylic acid anhydride and/or the epoxy can be encapsulated to inhibit premature crosslinking. The formulation is applied to a substrate surface as a hot melt at a moderate temperature, and subsequently cured by heating the adhesive composition to a higher curing temperature.
Inventors
- 👤 Mun F. Tse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:25
CPC Classifications
C; C09; C09J; C09J123/00; C09J123/02; C09J123/04; C09J123/08; C09J123/26; C08; C08L; C08L2666/00; C08L2666/02; C08L2666/14; C08L2666/22; C08L2666/28; C08L2666/34
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
56 words
A heat-curable hot melt adhesive comprising a mixture of: (a) a copolymer of ethylene and an unsaturated alcohol selected from the group consisting of vinyl alcohols, hydroxyalkyl acrylates, and hydroxyalkyl methacrylates; (b) optionally, a tackifier; (c) an epoxy crosslinking agent having an average epoxide functionality of at least about 2; and (d) a dicarboxylic acid anhydride.
Claim 2
Dependent Claim
56 words
A heat-curable hot melt adhesive comprising a mixture of: (a) a copolymer of ethylene and an unsaturated alcohol selected from the group consisting of vinyl alcohols, hydroxyalkyl acrylates, and hydroxyalkyl methacrylates; (b) optionally, a tackifier; (c) an epoxy crosslinking agent having an average epoxide functionality of at least about 2; and (d) a dicarboxylic acid anhydride.
Claim 3
Dependent Claim
33 words
The adhesive of claim 1 wherein said copolymer contains in the range of from about 5 to about 30 weight percent of said unsaturated alcohol, based on the total weight of said formulation.
Claim 4
Dependent Claim
13 words
The adhesive of claim 1, wherein said copolymer further comprises a vinyl termonomer.
Claim 5
Dependent Claim
44 words
The adhesive of claim 1, wherein said copolymer further comprises up to about 20 weight percent of a vinyl termonomer selected from the group consisting of alkyl acrylates and methacrylates other than said hydroxyalkyl acrylates and hydroxyalkyl methacrylates and vinyl esters of carboxylic acids.
Claim 6
Dependent Claim
14 words
The adhesive of claim 1, wherein said copolymer comprises partially hydrolyzed ethylene-vinyl acetate copolymer.
Claim 7
Dependent Claim
17 words
The adhesive of claim 1, wherein the copolymer is a copolymer of ethylene and 2-hydroxy ethyl methacrylate.
Claim 8
Dependent Claim
17 words
The adhesive of claim 1, wherein the copolymer is a copolymer of ethylene and a vinyl alcohol.
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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) | 1996-09-06 | 1997-03-08 | 1997-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-09-06 | 2001-03-08 | 2001-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-09-06 | 2005-03-08 | 2005-09-07 | $7700.00 | Window Closed / Lapsed |