US4217434A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure sensitive adhesive formulation
Assignee: Stauffer Chemical Co
•
Filing: 1978-10-02
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Granted: 1980-08-12
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Expires: 1998-10-02
Abstract
Abstract The adhesion of acrylic pressure sensitive adhesives to plastic substrates is improved by the presence of the adhesive of an effective amount for such adhesion improvement, e.g., from about 0.3% to about 4.0%, by weight of the adhesive when in liquid form, of a monoalkyl acid phosphate.
Inventors
- 👤 Earl A. Koeble
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:19
CPC Classifications
C; C09; C09J; C09J133/00; C09J133/04; C09J133/06; C09J133/08; C08; C08L; C08L2666/00; C08L2666/28; C08L2666/40; C09J2301/00; C09J2301/30; C09J2301/302; Y; Y10; Y10T; Y10T428/00; Y10T428/28; Y10T428/2848; Y10T428/2852; Y10T428/2878; Y10T428/2891
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
52 words
An improved liquid acrylic pressure sensitive adhesive formulation which comprises a polyacrylate elastomer component and which, when in dried form in a pressure sensitive product, has increased adhesion to a plastic substrate due to the presence in said adhesive formulation of an effective amount for said adhesion of a monoloweralkyl acid phosphate.
Claim 2
Dependent Claim
52 words
An improved liquid acrylic pressure sensitive adhesive formulation which comprises a polyacrylate elastomer component and which, when in dried form in a pressure sensitive product, has increased adhesion to a plastic substrate due to the presence in said adhesive formulation of an effective amount for said adhesion of a monoloweralkyl acid phosphate.
Claim 3
Dependent Claim
25 words
A formulation as claimed in claim 1 wherein the monoalkyl acid phosphate comprises from about 0.3% to about 4.0%, by weight of the liquid formulation.
Claim 4
Dependent Claim
33 words
A formulation as claimed in claim 1 which is in dried form in a pressure sensitive product and which comprises from about 0.5% to about 10%, by weight of the monoalkyl acid phosphate.
Claim 5
Dependent Claim
23 words
A formulation as claimed in either claim 1 or 2 or 3 wherein the monoalkyl group contains from 1 to 4 carbon atoms.
Claim 6
Dependent Claim
20 words
A formulation as claimed in either claim 1 or 2 or 3 wherein the monoalkyl group is a monoethyl group.
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) | 1983-08-12 | 1984-02-11 | 1984-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-08-12 | 1988-02-11 | 1988-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-08-12 | 1992-02-11 | 1992-08-12 | $7700.00 | Window Closed / Lapsed |