Patent US3917894A successfully refreshed from Google Patents.
US3917894A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for coating regenerated cellulose film and the coated film
Assignee: Continental Group Inc
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Filing: 1973-08-17
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Granted: 1975-11-04
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Expires: 1993-08-17
Abstract
Abstract A coated regenerated cellulose film or sheet is primed in the gel state with an epoxy substituted resin consisting of a watersoluble, thermosetting reaction product of an epihalohydrin and a polysecondary amine, and then coated with a mixture of a resin and a liquid vehicle optionally including a dryer, plasticizer, or pigment. The cellulose film or sheet can be of the unreinforced and fiber-reinforced type.
Inventors
- 👤 Harold R Coleman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:01
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/20; C08G59/22; C08G59/28; A; A22; A22C; A22C13/00; A22C13/0013; B; B41; B41M; B41M1/00; B41M1/26; B41M1/30; C08B; C08B15/00; C08B15/005; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31511; Y10T428/31515; Y10T428/31971
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
130 words
A PROCESS FOR MANUFACTURING RESIN-COATED REGENERATED CELLULOSE FILM, WHICH COMPRISES: COATING ONE SURFACE OF A GEL CELLULOSE FILM PRIOR TO DRYING WITH A FIRST COATING COMPOSITION OF AN AQUEOUS SOLUTION OF A WATER-SOLUBLE EPOXY THERMOSETTING RESIN REACTION PRODUCT OF AN EPHIHALOHYDRIN AND A POLYSECONDARY AMINE SELECTED FROM THE GROUP CONSISTING OF POLYAMIDEAMINES AND POLYUREAAMINES, SAID EPOXY RESIN HAVING AN EPOXY EQUIVALENT WEIGHT OF AT LEAST ABOUT 100, DRYING THE COATED GEL FILM TO CURE SAID COATING AND PROVIDE ON THE ULTIMATELY PRODUCED DRIED REGENERATED CELLULOSE FILM A WATER-INSOLUBLE, CROSSLINKED, SURFACE COATING, APPLYING OVER THE CROSSLINKED SURFACE COATING THUS FORMED A THIN RESIN AND LIQUID VEHICLE, AND ING A RESIN AND LIQUID VEHICLE, AND HEATING THE COATED CASING TO DRY AND CURE THE SECOND COATING THEREON TO FORM AN ADHERENT FILM.
Claim 2
Dependent Claim
130 words
A PROCESS FOR MANUFACTURING RESIN-COATED REGENERATED CELLULOSE FILM, WHICH COMPRISES: COATING ONE SURFACE OF A GEL CELLULOSE FILM PRIOR TO DRYING WITH A FIRST COATING COMPOSITION OF AN AQUEOUS SOLUTION OF A WATER-SOLUBLE EPOXY THERMOSETTING RESIN REACTION PRODUCT OF AN EPHIHALOHYDRIN AND A POLYSECONDARY AMINE SELECTED FROM THE GROUP CONSISTING OF POLYAMIDEAMINES AND POLYUREAAMINES, SAID EPOXY RESIN HAVING AN EPOXY EQUIVALENT WEIGHT OF AT LEAST ABOUT 100, DRYING THE COATED GEL FILM TO CURE SAID COATING AND PROVIDE ON THE ULTIMATELY PRODUCED DRIED REGENERATED CELLULOSE FILM A WATER-INSOLUBLE, CROSSLINKED, SURFACE COATING, APPLYING OVER THE CROSSLINKED SURFACE COATING THUS FORMED A THIN RESIN AND LIQUID VEHICLE, AND ING A RESIN AND LIQUID VEHICLE, AND HEATING THE COATED CASING TO DRY AND CURE THE SECOND COATING THEREON TO FORM AN ADHERENT FILM.
Claim 3
Dependent Claim
27 words
The process in accordance with claim 1 in which said polysecondary amine is a polyamide amine formed by condensing a polyalkylene polyamine and a dicarboxylic aliphatic acid.
Claim 4
Dependent Claim
19 words
The process of claim 2 wherein said polyamide amine is the reaction product of adipic acid with diethylene triamine.
Claim 5
Dependent Claim
78 words
A film made from regenerated cellulose having a primer coat consisting of a coating comprising an insoluble, heat-cured reaction product of a water-soluble, thermosetting reaction product of an epihalohydrin and a polysecondary amine selected from the group consisting of polyamide amines and polyureaamines said reaction product having an epoxy equivalent of at least about 100, and an overcoat over said insoluble primer coat, said overcoat comprising an organic resin, said overcoat being tenaciously adherent to said primer coat.
Claim 6
Dependent Claim
78 words
A film made from regenerated cellulose having a primer coat consisting of a coating comprising an insoluble, heat-cured reaction product of a water-soluble, thermosetting reaction product of an epihalohydrin and a polysecondary amine selected from the group consisting of polyamide amines and polyureaamines said reaction product having an epoxy equivalent of at least about 100, and an overcoat over said insoluble primer coat, said overcoat comprising an organic resin, said overcoat being tenaciously adherent to said primer coat.
Claim 7
Dependent Claim
25 words
The film of claim 4 wherein said polysecondary amine is a polyamideamine and is prepared by reacting a polyalkylene polyamine with a dicarboxylic aliphatic acid.
Claim 8
Dependent Claim
20 words
The film of claim 5 wherein said polyalkylene polyamine is diethylene triamine and said dicarboxylic aliphatic acid is adipic acid.
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) | 1978-11-03 | 1979-05-05 | 1979-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-03 | 1983-05-05 | 1983-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-03 | 1987-05-05 | 1987-11-04 | $7700.00 | Window Closed / Lapsed |