EP0332183A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Electrostatic transparencies containing a polyester support
Assignee: EIDP Inc
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Filing: 1989-03-09
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Granted: —
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Expires: 2009-03-09
Abstract
Abstract An element suitable for preparing transparencies using an electrostatic plain paper copier is described. This element comprises a polyethylene terephthalate support (polyester), at least one subbing layer coated thereon and coated to the subbing layer a toner receptive layer comprising a mixture of an acrylate binder, a polymeric antistatic agent having carboxylic acid groups, a cross-linking agent, butylmethacrylate modified polymethacrylate beads and submicron polyethylene beads. These elements produce excellent transparencies.
Inventors
- 👤 Robert William Ashcraft
- 👤 John Hocking Bayless
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 14:02
CPC Classifications
G; G03; G03G; G03G7/00; G03G7/0053; G03G7/0006; G03G7/002; G03G7/0026; G03G7/004; Y; Y10; Y10T; Y10T428/00; Y10T428/16; Y10T428/162; Y10T428/25; Y10T428/254; Y10T428/31504; Y10T428/31786; Y10T428/31855; Y10T428/31909; Y10T428/31913; Y10T428/3192; Y10T428/31928
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
59 words
An element suitable for preparing electrostatic transparencies comprising a polyester support having coated thereon in order at least one subbing layer, and a toner receptive layer, wherein said toner receptive layer comprises an acrylate binder containing carboxylic acid groups, a polymeric antistatic agent having carboxylic acid groups thereon, a cross-linking agent, butylmethacrylate modified polymethacrylate beads and polyethylene or tetrafluoroethylenebeads.
Claim 2
Dependent Claim
59 words
An element suitable for preparing electrostatic transparencies comprising a polyester support having coated thereon in order at least one subbing layer, and a toner receptive layer, wherein said toner receptive layer comprises an acrylate binder containing carboxylic acid groups, a polymeric antistatic agent having carboxylic acid groups thereon, a cross-linking agent, butylmethacrylate modified polymethacrylate beads and polyethylene or tetrafluoroethylenebeads.
Claim 3
Dependent Claim
36 words
The element of claim 1 wherein the modified polymethylmethacrylate beads have an average particle size of about from 1 to 50 microns and the polyethylene or tetrafluoroethylene beads have a particle size less than one micron.
Claim 4
Dependent Claim
30 words
The element of Claim 1 wherein a subbing layer is applied to both sides of said support and a toner receptive layer is coated on both of said subbing layers.
Claim 5
Dependent Claim
96 words
A process for preparing a transparent element suitable for use as an electrostatic transparency, which comprises: a) preparing an aqueous dispersion of a cross-linking agent and a polymeric antistatic agent having pendent carboxylic groups thereon; b) adjusting the pH of the above dispersion to 6.0 to 6.9; c) adding thereto a mixture of a water soluble polyacrylate binder containing carboxylic acid groups and butylmethacrylate modified polymethacrylate beads dispersed in aqueous ammonia; and, d) dispersing submicron polyethylene beads therein, the final pH of said coating dispersion is above 7.0. e) coating the dispersion onto a support material.
Claim 6
Dependent Claim
96 words
A process for preparing a transparent element suitable for use as an electrostatic transparency, which comprises: a) preparing an aqueous dispersion of a cross-linking agent and a polymeric antistatic agent having pendent carboxylic groups thereon; b) adjusting the pH of the above dispersion to 6.0 to 6.9; c) adding thereto a mixture of a water soluble polyacrylate binder containing carboxylic acid groups and butylmethacrylate modified polymethacrylate beads dispersed in aqueous ammonia; and, d) dispersing submicron polyethylene beads therein, the final pH of said coating dispersion is above 7.0. e) coating the dispersion onto a support material.
References Cited (Backward Citations)
No citation records indexed.
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