US4112182A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastic moldings and sheeting
Assignee: Eastman Chemical Co
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Filing: 1977-04-04
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Granted: 1978-09-05
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Expires: 1997-04-04
Abstract
Abstract Plastic sheeting and other formed plastic articles, particularly of cellulose ester, having an improved overall balance of physical properties such as impact strength, solvent resistance, surface hardness and surface appearance are obtained by applying radiation curable compositions containing certain unsaturated cellulose ester materials to one or more surfaces of the articles and radiation curing the same.
Inventors
- 👤 Gordon C. Newland
- 👤 James G. Pacifici
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:36
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/12; C08J7/16; C08J7/18; B; B41; B41M; B41M7/00; B41M7/0045; C08J2301/00; C08J2301/08; C08J2301/10; Y; Y10; Y10S; Y10S428/00; Y10S428/911; Y10T; Y10T428/00; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/265; Y10T428/269; Y10T428/31; Y10T428/31504; Y10T428/31855; Y10T428/3188; Y10T428/31884; Y10T428/31891
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
71 words
A formed cellulose ester article having surface portions coated with a radiation-curable composition comprising ethylenically unsaturated cellulose ester wherein the average degree of saturation and unsaturation per anhydrogluclose unit is from 0.1 to less than 3.0 of each of the saturated and unsaturated moieties, in admixture with at least one α,β-unsaturated carboxylate comonomer, the ratio in parts by weight of unsaturated cellulose ester to unsaturated comonomer being from 1/20 to 20/1.
Claim 2
Dependent Claim
71 words
A formed cellulose ester article having surface portions coated with a radiation-curable composition comprising ethylenically unsaturated cellulose ester wherein the average degree of saturation and unsaturation per anhydrogluclose unit is from 0.1 to less than 3.0 of each of the saturated and unsaturated moieties, in admixture with at least one α,β-unsaturated carboxylate comonomer, the ratio in parts by weight of unsaturated cellulose ester to unsaturated comonomer being from 1/20 to 20/1.
Claim 3
Dependent Claim
87 words
The article of claim 1 wherein the ethylenically unsaturated cellulose ester is selected from esters wherein the unsturated moiety is acrylate, methacrylate or crotonate, the saturated moiety is selected from acetate, propionate, butyrate or mixtures thereof, wherein the average degree of unsaturation per anhydroglucose unit is from 0.1 to 2.0, and wherein the unsaturated carboxylate comonomer is selected from 2-hydroxyethylacrylate, 2-methoxyethylacrylate, 2-hydroxyethylmethacrylate, 2-methoxyethylmethacrylate, 2-hydroxypropylcrylate, butyl acrylate and 2-ethylhexylacrylate, the ratio in parts by weight of unsaturated cellulose ester to unsaturated comonomer being from about 1/2 to 10/1.
Claim 4
Dependent Claim
20 words
The article of claim 1 wherein the composition contains from about 1 to about 25% by weight of a photoinitiator.
Claim 5
Dependent Claim
18 words
The composition of claim 2 wherein the composition contains from 2.0 to 15.0% by weight of a photoinitiator.
Claim 6
Dependent Claim
24 words
The article of claim 1 in the form of a sheet, and the coating being from about 0.5 to about 5.0 mils in thickness.
Claim 7
Dependent Claim
18 words
The article of claim 5 wherein the sheet is selected from cellulose acetate butyrate and cellulose acetate propionate.
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) | 1981-09-04 | 1982-03-06 | 1982-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-04 | 1986-03-06 | 1986-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-04 | 1990-03-06 | 1990-09-05 | $7700.00 | Window Closed / Lapsed |