Patent US3874880A successfully refreshed from Google Patents.
US3874880A
Expired / Lapsed
US
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Photographic elements with a support comprising polymeric propylene compositions
Assignee: Eastman Kodak Co
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Filing: 1972-11-24
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Granted: 1975-04-01
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Expires: 1992-11-24
Abstract
Abstract Compositions are provided comprising a film-forming crystalline polypropylene, crystalline block copolymer of propylene and at least one other Alpha -monoolefin selected from the group of ethylene and Alpha -monoolefin hydrocarbons of 4 to 10 carbon atoms or mixtures of the block copolymer and the polypropylene, having incorporated therein about 15 to 40 percent by weight talc, 5 to 15 percent by weight titanium dioxide pigment, 5 to 20 percent of an elastomer and 1/10 to 1 percent by weight of a polyolefin antioxidant. The films or sheets prepared from these polyolefin compositions have the stiffness, opacity and printability normally associated with paper and provide excellent replacements for paper used in photographic elements. In addition, they have excellent tear strength and elongation.
Inventors
- 👤 William J Venor
- 👤 John C Hoppe
- 👤 Jr William W Blount
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:20
CPC Classifications
G; G03; G03C; G03C8/00; G03C8/42; G03C8/52; C; C08; C08K; C08K3/00; C08K3/34; C08L; C08L53/00; G03C1/00; G03C1/76; G03C1/95
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
28 words
A BLOCK COPOLYMER OF PROPYLENE WITH AT LEAST ONE OTHER A-MONOOLEFIN SELECTED FROM THE GROUP OF A. ETHYLENE, AND B. A-MONOOLEFIN HYDROCARBONS OF 4 TO 10 CARBON ATOMS;
Claim 2
Dependent Claim
28 words
A BLOCK COPOLYMER OF PROPYLENE WITH AT LEAST ONE OTHER A-MONOOLEFIN SELECTED FROM THE GROUP OF A. ETHYLENE, AND B. A-MONOOLEFIN HYDROCARBONS OF 4 TO 10 CARBON ATOMS;
Claim 3
Dependent Claim
48 words
A PHOTOGRAPHIC ELEMENT COMPRISING A PHOTOGRAPHIC SUPPORT COAT WITH AT LEAST ONE LAYER OF A LIGHT-SENSITIVE SILVER HALIDE EMULSION, SAID SUPPORT BEING FORMED FROM A COMPOSITION COMPRISING A. A FILM-FORMING CRYSTALLINE POLYMER CONTAINING AT LEAST 90 PERCENT BY WEIGHT OF POLYMERIZED PROPYLENE, SELECTED FROM THE CLASS CONSISTING OF:
Claim 4
Dependent Claim
48 words
A PHOTOGRAPHIC ELEMENT COMPRISING A PHOTOGRAPHIC SUPPORT COAT WITH AT LEAST ONE LAYER OF A LIGHT-SENSITIVE SILVER HALIDE EMULSION, SAID SUPPORT BEING FORMED FROM A COMPOSITION COMPRISING A. A FILM-FORMING CRYSTALLINE POLYMER CONTAINING AT LEAST 90 PERCENT BY WEIGHT OF POLYMERIZED PROPYLENE, SELECTED FROM THE CLASS CONSISTING OF:
Claim 5
Dependent Claim
9 words
MIXTURES OF CRYSTALLINE POLYPROPYLENE AND SAID BLOCK COPOLYMER; AND
Claim 6
Dependent Claim
9 words
MIXTURES OF CRYSTALLINE POLYPROPYLENE AND SAID BLOCK COPOLYMER; AND
Claim 7
Dependent Claim
58 words
Alpha -monoolefin hydrocarbons of 4 to 10 carbon atoms; B. about 15 to about 25 percent by weight talc; C. about 5 to about 10 percent by weight titanium dioxide pigment; D. about 5 to about 20 percent by weight of an ethylene/propylene rubber; and E. about 1/10 to about 1 percent by weight of a polyolefin antioxidant.
Claim 8
Dependent Claim
58 words
Alpha -monoolefin hydrocarbons of 4 to 10 carbon atoms; B. about 15 to about 25 percent by weight talc; C. about 5 to about 10 percent by weight titanium dioxide pigment; D. about 5 to about 20 percent by weight of an ethylene/propylene rubber; and E. about 1/10 to about 1 percent by weight of a polyolefin antioxidant.
Claim 9
Dependent Claim
16 words
a silver halide emulsion layer being a red sensitive layer containing an incorporated cyan-forming coupler and
Claim 10
Dependent Claim
16 words
a silver halide emulsion layer being a red sensitive layer containing an incorporated cyan-forming coupler and
Claim 11
Dependent Claim
22 words
The photographic element of claim 1 wherein said talc is present in an amount of about 15 to 25 percent by weight.
Claim 12
Dependent Claim
9 words
mixtures of crystalline polypropylene and said block copolymer; and
Claim 13
Dependent Claim
9 words
mixtures of crystalline polypropylene and said block copolymer; and
Claim 14
Dependent Claim
50 words
POLYPROPYLENE; B. ABOUT 15 TO ABOUT 40 PERCENT BY WEIGHT TALC; C. ABOUT 5 TO ABOUT 15 PERCENT BY WEIGHT TITANIUM DIOXIDE PIGMENT; D. ABOUT 5 TO ABOUT 20 PERCENT BY WEIGHT OF A POLYOLEFIN ELASTOMER; AND E. ABOUT 1/10 TO ABOUT 1 PERCENT BY WEIGHT OF A POLYOLEFIN ANTIOXIDANT.
Claim 15
Dependent Claim
50 words
POLYPROPYLENE; B. ABOUT 15 TO ABOUT 40 PERCENT BY WEIGHT TALC; C. ABOUT 5 TO ABOUT 15 PERCENT BY WEIGHT TITANIUM DIOXIDE PIGMENT; D. ABOUT 5 TO ABOUT 20 PERCENT BY WEIGHT OF A POLYOLEFIN ELASTOMER; AND E. ABOUT 1/10 TO ABOUT 1 PERCENT BY WEIGHT OF A POLYOLEFIN ANTIOXIDANT.
Claim 16
Dependent Claim
50 words
polypropylene; B. about 15 to about 40 percent by weight talc; C. about 5 to about 15 percent by weight titanium dioxide pigment; D. about 5 to about 20 percent by weight of a polyolefin elastomer; and E. about 1/10 to about 1 percent by weight of a polyolefin antioxidant.
Claim 17
Dependent Claim
50 words
polypropylene; B. about 15 to about 40 percent by weight talc; C. about 5 to about 15 percent by weight titanium dioxide pigment; D. about 5 to about 20 percent by weight of a polyolefin elastomer; and E. about 1/10 to about 1 percent by weight of a polyolefin antioxidant.
Claim 18
Dependent Claim
23 words
The photographic element of claim 1 wherein said elastomer is selected from the group consisting of ethylene/propylene rubber and an isoolefin rubber polymer.
Claim 19
Dependent Claim
8 words
a green sensitive layer containing a magenta-forming coupler.
Claim 20
Dependent Claim
8 words
a green sensitive layer containing a magenta-forming coupler.
Claim 21
Dependent Claim
13 words
The photographic element of claim 1 wherein said elastomer comprises a propylene-ethylene-5-ethylene-2-norbornene terpolymer.
Claim 22
Dependent Claim
16 words
The photographic element of claim 1 wherein said elastomer comprises a copolymer of isobutylene and ethylene.
Claim 23
Dependent Claim
14 words
The photographic element of claim 1 wherein said composition comprises an ultraviolet light inhibitor.
Claim 24
Dependent Claim
14 words
The photographic element of claim 1 wherein the silver halide emulsion is spectrally sensitized.
Claim 25
Dependent Claim
14 words
A photographic element of claim 1 in which said emulsion is a direct-positive emulsion.
Claim 26
Dependent Claim
14 words
A photographic element of claim 1 in which said emulsion contains a color-forming coupler.
Claim 27
Dependent Claim
11 words
A photographic element of claim 1 having coated on said support:
Claim 28
Dependent Claim
57 words
A photographic element comprising a photographic support coated with at least one layer of a light-sensitive silver halide emulsion, said support being formed from a composition comprising A. a film-forming crystalline block copolymer of propylene containing at least 90 percent by weight of polymerized propylene, with at least one other Alpha -monoolefin selected from the group of
Claim 29
Dependent Claim
57 words
A photographic element comprising a photographic support coated with at least one layer of a light-sensitive silver halide emulsion, said support being formed from a composition comprising A. a film-forming crystalline block copolymer of propylene containing at least 90 percent by weight of polymerized propylene, with at least one other Alpha -monoolefin selected from the group of
References Cited (Backward Citations)
US3529037A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-31 | 1978-09-30 | 1979-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-31 | 1982-09-30 | 1983-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-31 | 1986-09-30 | 1987-04-01 | $7700.00 | Window Closed / Lapsed |