US4317892A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Barrier layer between reactants in photographic products comprising a mixture of vinylidene chloride terpolymer and polymeric carboxy-ester-lactone
Assignee: Eastman Kodak Co
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Filing: 1980-08-04
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Granted: 1982-03-02
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Expires: 2000-08-04
Abstract
Abstract A composition comprising a mixture of (1) from 5 to 95 percent by weight of a copolymer comprising from 55 to 85 percent by weight of vinylidene chloride, 5 to 35 percent by weight of an ethylenically unsaturated monomer, and 0 to 20 percent by weight of an ethylenically unsaturated carboxylic acid, and (2) from 5 to 95 percent by weight of a polymeric carboxy-ester-lactone, is useful as a temporary barrier between reactants in photographic products. The barrier is particularly useful as a process timing layer in color image transfer film units.
Inventors
- 👤 Edward P. Abel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:46
CPC Classifications
G; G03; G03C; G03C8/00; G03C8/42; G03C8/52; G03C8/54; C; C08; C08F; C08F8/00; C08F8/14; C08F8/16; C08L; C08L27/00; C08L27/02; C08L27/04; C08L27/08; C08L31/00; C08L31/02; C08L35/00; C08L35/02; C08L37/00
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
65 words
A composition comprising a mixture of (1) from 5 to 95 percent by weight of a copolymer comprising from 55 to 85 percent by weight of vinylidene chloride, 5 to 35 percent by weight of an ethylenically unsaturated monomer and 0 to 20 percent by weight of an ethylenically unsaturated carboxylic acid, and (2) from 5 to 95 percent by weight of a polymeric carboxy-ester-lactone.
Claim 2
Dependent Claim
65 words
A composition comprising a mixture of (1) from 5 to 95 percent by weight of a copolymer comprising from 55 to 85 percent by weight of vinylidene chloride, 5 to 35 percent by weight of an ethylenically unsaturated monomer and 0 to 20 percent by weight of an ethylenically unsaturated carboxylic acid, and (2) from 5 to 95 percent by weight of a polymeric carboxy-ester-lactone.
Claim 3
Dependent Claim
15 words
The composition of claim 1 wherein said ethylenically unsaturated monomer is methyl acrylate or acrylonitrile.
Claim 4
Dependent Claim
17 words
The composition of claim 1 wherein said ethylenically unsaturated carboxylic acid is acrylic acid or itaconic acid.
Claim 5
Dependent Claim
36 words
The composition of claim 1 wherein said copolymer comprises 55 to 85 percent by weight of vinylidene chloride, 5 to 35 percent by weight of acrylonitrile and 2 to 10 percent by weight of acrylic acid.
Claim 6
Dependent Claim
47 words
The composition of claim 1 wherein said polymeric carboxy-ester-lactone comprises the following recurring structural units: ##STR10## wherein: R is alkyl having 1 to 12 carbon atoms, aralkyl wherein said alkyl comprises 1 to 4 carbon atoms; and R 1 and R 2 are independently H or methyl.
Claim 7
Dependent Claim
17 words
The composition of claim 5 wherein R is n-butyl and R 1 and R 2 are H.
Claim 8
Dependent Claim
23 words
The composition of claim 5 additionally comprising the following recurring structural units: ##STR11## wherein n is an integer of from 1 to 5.
Claim 9
Dependent Claim
21 words
The composition of claim 5 wherein said polymeric carboxy-ester-lactone has 0.25 to 5.0 milliequivalents of acid per gram of said copolymer.
Claim 10
Dependent Claim
73 words
A composition comprising a mixture of (1) from 5 to 95 percent by weight of a copolymer comprising from 55 to 85 percent by weight of vinylidene chloride, 5 to 35 percent by weight of an ethylenically unsaturated monomer and 0 to 20 percent by weight of an ethylenically unsaturated carboxylic acid, and (2) from 5 to 95 percent by weight of a polymeric carboxy-ester-lactone, said mixture being dissolved in an organic solvent.
Claim 11
Dependent Claim
73 words
A composition comprising a mixture of (1) from 5 to 95 percent by weight of a copolymer comprising from 55 to 85 percent by weight of vinylidene chloride, 5 to 35 percent by weight of an ethylenically unsaturated monomer and 0 to 20 percent by weight of an ethylenically unsaturated carboxylic acid, and (2) from 5 to 95 percent by weight of a polymeric carboxy-ester-lactone, said mixture being dissolved in an organic solvent.
Claim 12
Dependent Claim
36 words
The composition of claim 9 wherein said copolymer comprises 55 to 85 percent by weight of vinylidene chloride, 5 to 35 percent by weight of acrylonitrile and 2 to 10 percent by weight of acrylic acid.
Claim 13
Dependent Claim
48 words
The composition of claim 9 wherein said polymeric carboxy-ester-lactone comprises the following recurring structural units: ##STR12## wherein: R is alkyl having 1 to 12 carbon atoms or aralkyl wherein said alkyl comprises 1 to 4 carbon atoms; and R 1 and R 2 are independently H or methyl.
Claim 14
Dependent Claim
24 words
The composition of claim 10 wherein the lactone additionally comprises the following units: ##STR13## wherein n is an integer of from 1 to 5.
Claim 15
Dependent Claim
64 words
A composition comprising a mixture of (1) 60 percent by weight of poly(acrylonitrile-co-vinylidene chloride-co-acrylic acid) having a weight ratio of 14/80/6, and (2) 40 percent by weight of the polymeric carboxy-ester-lactone produced by lactonization and esterification of poly(vinyl acetate-co-maleic anhydride) (1:1) with n-butanol and having 0.25 to 5.0 milliequivalents of acid per gram of said carboxy-ester-lactone, said mixture being dissolved in an organic solvent.
Claim 16
Dependent Claim
64 words
A composition comprising a mixture of (1) 60 percent by weight of poly(acrylonitrile-co-vinylidene chloride-co-acrylic acid) having a weight ratio of 14/80/6, and (2) 40 percent by weight of the polymeric carboxy-ester-lactone produced by lactonization and esterification of poly(vinyl acetate-co-maleic anhydride) (1:1) with n-butanol and having 0.25 to 5.0 milliequivalents of acid per gram of said carboxy-ester-lactone, said mixture being dissolved in an organic solvent.
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) | 1985-03-01 | 1985-08-31 | 1986-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-03-01 | 1989-08-31 | 1990-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-03-01 | 1993-08-31 | 1994-03-02 | $7700.00 | Window Closed / Lapsed |