Patent US3856530A successfully refreshed from Google Patents.
US3856530A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic polyester film material comprising antistatic layer
Assignee: Agfa Gevaert NV
•
Filing: 1973-07-30
•
Granted: 1974-12-24
•
Expires: 1993-07-30
Abstract
Abstract A photographic film material comprising a polyester film support and at least one silver halide emulsion layer is provided with an antistatic coating comprising a homogeneous mixture of (A) a chlorine-containing polymer consisting of at least 70% by weight of at least one monomer taken from vinyl chloride and vinylidene chloride, and (B) a polymeric material having electroconductive properties, the ratio of chlorine-containing polymer to electroconductive polymeric material varying between 2:1 and 1:2 parts by weight.
Inventors
- 👤 Paesschen A Van
- 👤 J Herbots
- 👤 D Timmerman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:33
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/85; G03C1/89; C; C08; C08L; C08L27/00; C08L27/02; C08L27/04; C08L35/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
131 words
PHOTOGRAPHIC FILM MATERIAL COMPRISING A POLYESTER FILM SUPPORT, AT LEAST ONE LIGHT-SENSITIVE HALIDE EMULSION LAYER ON ONE SIDE OF THE POLYESTER SUPPORT, AND ON THE OTHER SIDE A LAYER OF AN ANTISTATIC COATING COMPOSITION FOR A POLYESTER FILM SUPPORT, COMPRISING AN HOMOGENUOS MIXTURE OF (A) A CHLORINE-CONTAINING POLYMER CONSISTING OF AT LEAST 70% BY WEIGHT OF AT LEAST ONE MONOMER TAKEN FROM VINYL CHLORIDE AND VINYLIDENE CHLORIDE, (B) A POLYMERIC MATERIAL HAVING ELECTROCONDUCTIVE PROPERTIES, AND (C) ABOUT 10 TO 20% BY WEIGHT OF A WZXY MATERIAL, THE RATIO OF CHLORINE-CONTAINING POLYMER TO ELECTROCONDUCTIVE POLYMERIC MATERIAL IN SAID HOMOGENEOUS MIXTURE VARYING BETWEEN 2:1 AND 1:2 PARTS BY WEIGHT, SAID COMPOSITION HAVING A SURFACE RESISTANCE OF 30% RH OF LESS THAN 1.10**10 OHM/10 SQ.CM AND AT 60% RH LESS THAN 1.10**9 OHM/10 SQ.CM.
Claim 2
Dependent Claim
131 words
PHOTOGRAPHIC FILM MATERIAL COMPRISING A POLYESTER FILM SUPPORT, AT LEAST ONE LIGHT-SENSITIVE HALIDE EMULSION LAYER ON ONE SIDE OF THE POLYESTER SUPPORT, AND ON THE OTHER SIDE A LAYER OF AN ANTISTATIC COATING COMPOSITION FOR A POLYESTER FILM SUPPORT, COMPRISING AN HOMOGENUOS MIXTURE OF (A) A CHLORINE-CONTAINING POLYMER CONSISTING OF AT LEAST 70% BY WEIGHT OF AT LEAST ONE MONOMER TAKEN FROM VINYL CHLORIDE AND VINYLIDENE CHLORIDE, (B) A POLYMERIC MATERIAL HAVING ELECTROCONDUCTIVE PROPERTIES, AND (C) ABOUT 10 TO 20% BY WEIGHT OF A WZXY MATERIAL, THE RATIO OF CHLORINE-CONTAINING POLYMER TO ELECTROCONDUCTIVE POLYMERIC MATERIAL IN SAID HOMOGENEOUS MIXTURE VARYING BETWEEN 2:1 AND 1:2 PARTS BY WEIGHT, SAID COMPOSITION HAVING A SURFACE RESISTANCE OF 30% RH OF LESS THAN 1.10**10 OHM/10 SQ.CM AND AT 60% RH LESS THAN 1.10**9 OHM/10 SQ.CM.
Claim 3
Dependent Claim
13 words
A material according to claim 1 wherein the waxy material is N, N-ethylene-bis-oleylamide.
Claim 4
Dependent Claim
133 words
Photographic film material comprising a polyester film support, at least one light-sensitive silver halide emulsion layer on one side of the polyester support, and on the other side a layer of an antistatic coating composition for a polyester film support, comprising an homogeneous mixture of (A) a chlorine-containing polymer consisting of at least 70% by weight of at least one monomer taken from vinyl chloride and vinylidene chloride, and (B) a polymeric material having electroconductive properties, the ratio of chlorine-containing polymer to electroconductive polymeric material in said homogeneous mixture varying between 2:1 and 1:2 parts by weight, said composition having a surface resistance at 30% RH of less than 1.1010 ohm/10 sq.cm. and at 60% RH less than 1.109 ohm/10 sq.cm., said antistatic layer having a thickness not greater than about 1 micron.
Claim 5
Dependent Claim
133 words
Photographic film material comprising a polyester film support, at least one light-sensitive silver halide emulsion layer on one side of the polyester support, and on the other side a layer of an antistatic coating composition for a polyester film support, comprising an homogeneous mixture of (A) a chlorine-containing polymer consisting of at least 70% by weight of at least one monomer taken from vinyl chloride and vinylidene chloride, and (B) a polymeric material having electroconductive properties, the ratio of chlorine-containing polymer to electroconductive polymeric material in said homogeneous mixture varying between 2:1 and 1:2 parts by weight, said composition having a surface resistance at 30% RH of less than 1.1010 ohm/10 sq.cm. and at 60% RH less than 1.109 ohm/10 sq.cm., said antistatic layer having a thickness not greater than about 1 micron.
Claim 6
Dependent Claim
23 words
A material according to claim 3 wherein said antistatic layer has a thickness in the range between about 0.4 and about 1 micron.
Claim 7
Dependent Claim
26 words
A material according to claim 3 wherein the chlorine-containing polymer is a copolymer of vinyl chloride and vinyl acetate containing 87% by weight of vinyl chloride.
Claim 8
Dependent Claim
26 words
A material according to claim 3 wherein the chlorine-containing polymer is the copolymer of vinylidene chloride, N-tert-butylacrylamine, n-butyl acrylate and itaconic acid (70:23: 3:4% by weight).
Claim 9
Dependent Claim
28 words
A material according to claim 3 wherein the polymeric material having electroconductive properties is the sodium salt of the copolymer of styrene and maleic acid (50:50 mole %).
Claim 10
Dependent Claim
33 words
A material according to claim 3 wherein the polymeric material having electroconductive properties is the sodium salt of the copolymer of N-(methacryloyloxyethyl)-trimethylammonium methylsulphate, Beta -chloroethyl acrylate and acrylic acid (60: 25:15 mole %).
References Cited (Backward Citations)
US2627088A
Cited
US3514291A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-23 | 1978-06-24 | 1978-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-23 | 1982-06-24 | 1982-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-23 | 1986-06-24 | 1986-12-24 | $7700.00 | Window Closed / Lapsed |