US4293595A
Expired / Lapsed
US
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Aqueous process for making a conductive medium for electrostatic printing
Assignee: International Paper Co
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Filing: 1979-03-28
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Granted: 1981-10-06
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Expires: 1999-03-28
Abstract
Abstract An improved aqueous process for making a conductive medium for electrostatic printing and the conductive medium therefrom, the process comprising applying to one side of a high density basestock a partially insolubilizable aqueous conductive latex precoat, preferably ranging in coat weight from 0.5 to 1.0 pounds per 3000 ft 2 , the insolubiliztion of the conductive latex resulting from a partial insolubilization of the major conductive component of the latex; applying to the other side of the basestock a first aqueous low-resistance conductive precoat preferably having a coat weight of about 2 pounds per 3000 ft 2 ; partially insolubilizing the conductive latex precoat; applying to the partially insolubilized latex precoat an aqueous dielectric coating preferably ranging in coat weight from 4.5 to 6.5 pounds per 3000 ft 2 ; and applying to the first low-resistance precoat a second aqueous low-resistance conductive coating preferably ranging in coat weight from 0.5 to 1.5 pounds per 3000 ft 2 . The conductive paper comprises on the one side of a high density basestock a partially insolubilized aqueous conductive latex layer, preferably ranging in weight from 0.5 to 1.0 pounds per 3000 ft 2 , the insolubilization of the conductive latex resulting from a partial insolubilization of the major conductive component of the latex and on top thereof a dielectric layer preferably ranging in weight from 4.5 to 6.5 pounds per 3000 ft 2 and comprises on the other side of the basestock at least two aqueous conductive layers, preferably having a total weight of from about 2.5 to 3.5 pounds per 3000 ft 2 .
Inventors
- 👤 William H. Kreiling
- 👤 Edward S. Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 01:37
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/10; G03G5/105; G03G5/02; G03G5/0202; G03G5/0205; G03G5/0208; G03G5/0217; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678; Y10T428/31692; Y10T428/31696; Y10T428/31855; Y10T428/3188; Y10T428/31895; Y10T442/00; Y10T442/20; Y10T442/2041; Y10T442/2049; Y10T442/2057; Y10T442/2066; Y10T442/2418; Y10T442/2459
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
137 words
An improved process for making a conductive medium for electrostatic printing comprising applying to a first side of a high density basestock a partially insolubilizable aqueous conductive latex precoat comprising an interpolymer of a butadienebased polymer latex and a αβ-olefinically unsaturated carboxylic acid monomer, the insolubilization of the conductive latex resulting from partial insolubilization of the major conductive component of the latex; applying to the other side of the basestock a first aqueous low-resistance coating; partially insolubilzing the conductive latex precoat, the extent of said partial insolubilization being controlled so as to provide to said first side of the basestock a surface resistivity of about 1×10 10 ohm/square at 50% relative humidity; applying to the partially insolubilized conductive latex precoat an aqueous dielectric coating; and applying to the first aqueous low-resistance coating a second aqueous low-resistance coating.
Claim 2
Dependent Claim
137 words
An improved process for making a conductive medium for electrostatic printing comprising applying to a first side of a high density basestock a partially insolubilizable aqueous conductive latex precoat comprising an interpolymer of a butadienebased polymer latex and a αβ-olefinically unsaturated carboxylic acid monomer, the insolubilization of the conductive latex resulting from partial insolubilization of the major conductive component of the latex; applying to the other side of the basestock a first aqueous low-resistance coating; partially insolubilzing the conductive latex precoat, the extent of said partial insolubilization being controlled so as to provide to said first side of the basestock a surface resistivity of about 1×10 10 ohm/square at 50% relative humidity; applying to the partially insolubilized conductive latex precoat an aqueous dielectric coating; and applying to the first aqueous low-resistance coating a second aqueous low-resistance coating.
Claim 3
Dependent Claim
32 words
The process of claim 1 wherein the αβ-olefinically unsaturated carboxylic acid monomer is selected from the group consisting of acrylic acid, methacrylic acid, αchloroacrylic acid, sorbic acid, cinnamic acid, and maleic acid.
Claim 4
Dependent Claim
34 words
The process of claim 1 wherein the partial insolubilization of the aqueous conductive latex is effected by an amine cross-linking agent selected from the group consisting of urea formaldehyde, melamine formaldehyde and hexamethoxymethyl melamine.
Claim 5
Dependent Claim
33 words
The process of claim 1 wherein the dielectric coating comprises a resin binder and a pigment selected from the group consisting of zinc oxide, titanium oxide, cadmium sulfate, barium sulfate and mixtures thereof.
Claim 6
Dependent Claim
13 words
The process of claim 4 wherein the dielectric coating also includes diatomaceous earth.
Claim 7
Dependent Claim
28 words
The process of claim 4 wherein the resin binder is selected from the group consisting of butadiene-styrene copolymers with acrylic acid, alkali-sensitive butadiene-styrene, styrene-acrylate copolymers and vinyl acetate.
Claim 8
Dependent Claim
26 words
The process of claim 1 wherein each of the low-resistance coatings is selected separately from the group consisting of salt/starch mixtures, protein/salt mixtures, and quaternary amines.
Claim 9
Dependent Claim
29 words
The process of claim 6 wherein the low-resistance coating adjacent the other side of the basestock is a salt/starch mixture and the other low-resistance coating is a quaternary amine.
Claim 10
Dependent Claim
57 words
The process of claim 1 wherein the partially insolubilizable aqueous conductive latex precoat ranges in coat weight from about 0.3 to 5.0 pounds/3000 square feet; the dielectric coating ranges in coat weight from about 2.0 to 10.0 pounds/square feet; and the low-resistance coatings have a total coat weight of from about 1.0 to 10.0 pounds/3000 square feet.
Claim 11
Dependent Claim
45 words
The process of claim 9 wherein the low-resistance coating adjacent the other side of the basestock ranges in coat weight from about 0.5 to 5.0 pounds/3000 square feet and the other low-resistance coating ranges in coat weight from about 0.5 to 5.0 pounds/3000 square feet.
Claim 12
Dependent Claim
56 words
The process of claim 1 wherein the partially insolubilized aqueous conductive latex precoat ranges in coat weight from about 0.5 to 2.5 pounds/3000 square feet; the dielectric coating ranges in coat weight from about 4.5 to 6.5 pounds/square feet and the low-resistance coatings have a total weight of from about 2.5 to 3.5 pounds/3000 square feet.
Claim 13
Dependent Claim
45 words
The process of claim 11 wherein the low-resistance coating adjacent the other side of the basestock ranges in coat weight from about 0.5 to 2.5 pounds/3000 square feet and the other low-resistance coating ranges in coat weight from about 0.5 to 2.5 pounds/3000 square feet.
Claim 14
Dependent Claim
26 words
The process of claim 1 wherein the basestock is selected from the group consisting of metal, metallic foil, paper, non-woven fabrics, wood, plastic film and cloth.
Claim 15
Dependent Claim
10 words
The process of claim 1 wherein the basestock is paper.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-10-05 | 1985-04-06 | 1985-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-05 | 1989-04-06 | 1989-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-05 | 1993-04-06 | 1993-10-06 | $7700.00 | Window Closed / Lapsed |