US3697618A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure-sensitive adhesive
Assignee: Indopco Inc
•
Filing: 1969-12-30
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Granted: 1972-10-10
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Expires: 1989-12-30
Abstract
Abstract Acrylic pressure-sensitive adhesives consisting essentially of a normally tacky interpolymer of one or more alkyl acrylates of four to 14 carbon atoms in the alkyl group, at least one vinyl ester of a saturated monocarboxylic acid, and a small amount of alpha, beta-ethylenically unsaturated dicarboxylic acid or anhydride, the interpolymer having a Williams plasticity number between about 1.8 and about 3. These adhesives are especially adapted for use on flexible non-fibrous backings, particularly vinyl sheets and films, and when used in this manner have the advantage of preventing shrinking of the backing upon aging.
Inventors
- 👤 Valentine J Grunewalder
- 👤 Earl A Koeble
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:07
CPC Classifications
C; C08; C08F; C08F218/00; C08F218/02; C08F218/04; C08F220/00; C08F220/02; C08F220/10; C08F220/12; C08F220/16; C08F220/18; C08F220/1808; C09; C09J; C09J133/00; C09J133/04; C09J133/06; C09J133/08; C09J7/00; C09J7/20; C09J7/22; C09J7/30; C09J7/38; C09J2301/00; C09J2301/30; C09J2301/302; Y; Y10; Y10S; Y10S526/00; Y10S526/931
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
12 words
The adhesive of claim 1 in which component (C) is maleic anhydride.
Claim 2
Dependent Claim
13 words
The adhesive of claim 1 in which said vinyl ester is vinyl acetate.
Claim 3
Dependent Claim
18 words
The adhesive of claim 1 in which said alkyl acrylate contains eight carbon atoms in the alkyl group.
Claim 4
Dependent Claim
66 words
The adhesive of claim 1 in which said interpolymer consists essentially of A. at least one alkyl acrylate containing four to 14 carbon atoms in the alkyl group, B. from about 25 to about 45 percent by weight of vinyl acetate, and C. from about 0.5 to about 3 percent by weight of at least one member of the group consisting of maleic acid or anhydride.
Claim 5
Dependent Claim
13 words
The adhesive of claim 5 in which said alkyl acrylate is 2-ethylhexyl acrylate.
Claim 6
Dependent Claim
25 words
A normally tacky and pressure-sensitive adhesive coated article comprising a backing member and superimposed thereon a dried film of the adhesive composition of claim 1.
Claim 7
Dependent Claim
14 words
The article of claim 7 in which said backing member is flexible sheet material.
Claim 8
Dependent Claim
27 words
A normally tacky and pressure-sensitive adhesive coated article comprising a flexible, non-fibrous backing member and superimposed thereon a dried film of the adhesive composition of claim 5.
Claim 9
Dependent Claim
14 words
The article of claim 9 in which said backing member is vinyl halide polymer.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-10 | 1976-04-10 | 1976-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-10 | 1980-04-10 | 1980-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-10 | 1984-04-10 | 1984-10-10 | $7700.00 | Window Closed / Lapsed |