US3661618A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of pressure sensitive adhesives
Assignee: Occidental Chemical Corp
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Filing: 1969-06-30
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Granted: 1972-05-09
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Expires: 1989-06-30
Abstract
Abstract Pressure sensitive adhesives are prepared from a monomer layer composition containing a liquid alkyl acrylate having an adjusted viscosity of about 100 centipoises or higher and optionally containing cross-linking monomers, by subjecting the monomer layer to high energy particle radiation in the essential absence of oxygen.
Inventors
- 👤 Robert S Brookman
- 👤 Stephen Grib
- 👤 Dale S Pearson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:34
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/12; C08J7/16; C08J7/18; C09; C09J; C09J7/00; C09J7/20; C09J7/21; C09J7/30; C09J7/38; C09J7/381; C09J7/385; Y; Y10; Y10T; Y10T428/00; Y10T428/14; Y10T428/1452; Y10T428/1462
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
32 words
The process of claim 1 wherein prior to subjecting the monomer layer to irradiation, a release layer is applied to said monomer layer therby essentially to exclude oxygen from the monomer layer.
Claim 2
Dependent Claim
19 words
The process of claim 1 wherein a free radical yielding agent is additIonally present in said monomeric layer composition.
Claim 3
Dependent Claim
13 words
The process according to claim 1 wherein the acrylate is 2-ethyl hexyl acrylate.
Claim 4
Dependent Claim
19 words
The process of claim 1 wherein the viscosity regulator is a copolymer of 2-ethyl hexyl acrylate and vinyl acetate.
Claim 5
Dependent Claim
20 words
The process of claim 1 wherein said acrylate monomer constitutes at least 50 weight percent of the entire monomeric composition.
Claim 6
Dependent Claim
49 words
The process according to claim 1 wherein the multi-functional monomer is a lower alkyl or alkenyl ester of a hydroxy compound having from two to six carbon atoms and at least two hydroxyl groups and said viscosity regulator is a polyolefin, a polyester or an olefin-ethylenically unsaturated ester copolymer.
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) | 1975-05-09 | 1975-11-08 | 1976-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-09 | 1979-11-08 | 1980-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-09 | 1983-11-08 | 1984-05-09 | $7700.00 | Window Closed / Lapsed |