Patent US4933012A successfully refreshed from Google Patents.
US4933012A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aqueous coating for copy paper, and a process for the production thereof
Assignee: Wacker Chemie AG
•
Filing: 1989-01-11
•
Granted: 1990-06-12
•
Expires: 2009-01-11
Abstract
Abstract Aqueous coating of copy paper based on a porous inorganic matrix, an elastifying organic polymer and the color paste included in the pores. The inorganic matrix comprises a Zr 4+ polycondensate or Zr/Al mixed oxide gel, which is preferably elastified by addition of alkali-soluble polyacrylates or poly(vinyl acetates) or water-soluble poly(vinyl alcohols) and contains the color paste included in the pores. For production, an aqueous solution or dispersion of the polymer is initially introduced, adjusted to a pH of from 8 to 9 by adding ammonia, and the color paste and an aqueous solution of the Zr compound are subsequently admixed. The coating composition is applied to a backing material and dried in a known manner.
Inventors
- 👤 Richard Goetze
- 👤 Maximilian Kerbl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 01:25
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/10
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
50 words
A copy coating comprised of a porous inotganic matrix of a Zr +4 polycondensate or a ZrO 2 .Al 2 O 3 gel, an elastifying amount of a film-forming water-soluble or water-dispersible organic polymer, and an oil dispersion of a pigment paste colorant included in the pores of said matrix.
Claim 2
Dependent Claim
50 words
A copy coating comprised of a porous inotganic matrix of a Zr +4 polycondensate or a ZrO 2 .Al 2 O 3 gel, an elastifying amount of a film-forming water-soluble or water-dispersible organic polymer, and an oil dispersion of a pigment paste colorant included in the pores of said matrix.
Claim 3
Dependent Claim
11 words
A coating of claim 1 wherein the organic polymer is crosslinked.
Claim 4
Dependent Claim
32 words
A coating of claim 1 wherein the elastifying polymer comprises at lest one aqueous alkali-soluble polyacrylate or poly(vinyl acetate) containing from about 5 to about 15% by weight of carboxyl group-containing comonomers.
Claim 5
Dependent Claim
15 words
A coating of claim 1 wherein the elastifying polymer comprises at least one water-dispersible polymer.
Claim 6
Dependent Claim
58 words
A coating of claim 1 wherein the coating comprises: (1) about 20%-80% by weight of a binder comprising the porous inorganic matrix and the elastifying organic polymer, wherein the ratio by weight of porous inorganic matrix to organic polymer is from about 1:1 to about 1:5, and (2) about 80% to about 20% by weight of color paste.
Claim 7
Dependent Claim
15 words
A coating of claim 5 further comprising at least one plasticizer for the organic polymer.
Claim 8
Dependent Claim
72 words
A composition for forming a copy coating consisting essentially of: (1) a water soluble Zr +4 compound or a Zr/Al mixed oxide compound which upon heating in an alkaline medium containing NH 3 polycondensates to form zirconium oxide hydrates or zirconium/aluminum mixed oxide gels; (2) an elastifying amount of a water-soluble or water-dispersible elastifying organic polymer for the inorganic, porous matrix film forming composition; (3) a pigment paste colorant; and (4) water.
Claim 9
Dependent Claim
72 words
A composition for forming a copy coating consisting essentially of: (1) a water soluble Zr +4 compound or a Zr/Al mixed oxide compound which upon heating in an alkaline medium containing NH 3 polycondensates to form zirconium oxide hydrates or zirconium/aluminum mixed oxide gels; (2) an elastifying amount of a water-soluble or water-dispersible elastifying organic polymer for the inorganic, porous matrix film forming composition; (3) a pigment paste colorant; and (4) water.
Claim 10
Dependent Claim
37 words
A composition of claim 7 further comprising at least one additive selected from the group consisting of a cosolvent for the organic polymer, a plasticizer for the organic polymer and a crosslinking agent for the organic polymer.
Claim 11
Dependent Claim
50 words
A composition of claim 7 wherein said organic polymer is at least one polymer selected from the group consisting of water-soluble poly(vinyl alcohol), water-soluble cellulose derivatives, water-soluble polyacrylamides, water-soluble polyacrylic acids, polyvinylpyrrolidones, dispersible poly(vinylacetate), water-dispersible vinylacetate/ethylene copolymers, a water-dispersible vinylacetate, ethylene, vinylchloride copolymers, water-dispersible polyacrylates, water-dispersible polyurethanes and SBR lattices.
Claim 12
Dependent Claim
37 words
A composition of claim 7 further comprising at least one additive selected from the group consisting of a cosolvent for the organic polymer, a plasticizer for the organic polymer and a crosslinking agent for the organic polymer.
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) | 1993-06-11 | 1993-12-11 | 1994-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-06-11 | 1997-12-11 | 1998-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-06-11 | 2001-12-11 | 2002-06-12 | $7700.00 | Window Closed / Lapsed |