US4822769A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High solids content coated back paper
Assignee: Nashua Corp
•
Filing: 1987-08-20
•
Granted: 1989-04-18
•
Expires: 2007-08-20
Abstract
Abstract Disclosed is a coating composition for producing a high solids content carboxymethylcellulose based "CB" coating for use in pressure sensitive carbonless copy systems. The formulation comprises carboxylmethylcellulose, a wall-forming carboxylated acrylic resin, an organic cross-linker, a polyvalent metal salt, and an oil containing color-forming dye. The composition has a solids content of at least 30% and a viscosity within the range of 50 to 5000 centiposes. The CB paper exhibits the ability to produce improved imaging on computer and dot matrix printers because of better release efficiency and may be manufactured using less energy.
Inventors
- 👤 George O. Langlais
- 👤 Pat Y. H. Wang
- 👤 Joseph S. Chaplick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 01:27
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/124; B41M5/132; Y; Y10; Y10S; Y10S428/00; Y10S428/914; Y10T; Y10T428/00; Y10T428/27; Y10T428/273; Y10T428/277
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
135 words
A coated sheet for use in a pressure-sensitive record element which, upon application of pressure, release a color-forming material, said sheet comprising a substrate having disposed on a surface thereof an adhered, dried, coating composition present at a coating weight greater than 3.00 grams per square meter, the coating composition comprising the following materials in the following parts by weight: ______________________________________
Material Parts by Weight
______________________________________
Carboxymethylcellulose
10
a salt of a polyvalent metal
4.4-12.2
a wall-forming carboxylated acrylic resin
50-200
an organic cross-linker reactive with
10-150
carboxymethylcellulose and said
acrylic resin
spacer particles, and 100-500
a color-forming dye dissolved in
300-1,000
oil solvent,
______________________________________ said composition having before application a total non-aqueous content of at least 30% by weight and a Brookfield viscosity at 78° F. of from about 50 to about 5,000 cps.
Claim 2
Dependent Claim
135 words
A coated sheet for use in a pressure-sensitive record element which, upon application of pressure, release a color-forming material, said sheet comprising a substrate having disposed on a surface thereof an adhered, dried, coating composition present at a coating weight greater than 3.00 grams per square meter, the coating composition comprising the following materials in the following parts by weight: ______________________________________
Material Parts by Weight
______________________________________
Carboxymethylcellulose
10
a salt of a polyvalent metal
4.4-12.2
a wall-forming carboxylated acrylic resin
50-200
an organic cross-linker reactive with
10-150
carboxymethylcellulose and said
acrylic resin
spacer particles, and 100-500
a color-forming dye dissolved in
300-1,000
oil solvent,
______________________________________ said composition having before application a total non-aqueous content of at least 30% by weight and a Brookfield viscosity at 78° F. of from about 50 to about 5,000 cps.
Claim 3
Dependent Claim
17 words
The coated sheet of claim 1 wherein the carboxy methyl cellulose has a 0.65-1.8 degree of substitution.
Claim 4
Dependent Claim
13 words
The coated sheet of claim 1 wherein the organic cross-linker is a polyamide-epichlorolhydrin.
Claim 5
Dependent Claim
18 words
The coated sheet of claim 1 wherein the wall-forming acrylic resin is a carboxylated copolymer of poly ethylacrylate/methylmethacrylate.
Claim 6
Dependent Claim
26 words
The coated sheet of claim 1 wherein said materials are present in amounts sufficient to provide a total non-aqueous content of at least 35% by weight.
Claim 7
Dependent Claim
21 words
The coated sheet of claim 1 wherein the percent dye in oil in the formulation is within the range of 3%-12%.
Claim 8
Dependent Claim
15 words
The coated sheet of claim 1 wherein the carboxymethylcellulose has a 1.1-1.5 degree of substitution.
Claim 9
Dependent Claim
62 words
The coated sheet of claim 1 comprising the following materials in the following parts by weight: ______________________________________
Material Parts by Weight
______________________________________
carboxymethylcellulose,
100
a salt of a polyvalent metal,
5-6
a wall-forming carboxylated acrylic resin,
60-100
an organic cross-linker reactive with
60-100
carboxymethycellulose and said
acrylic resin,
spacer particles, and 200-300
a color-forming dye dissolved
600-800.
in an oil solvent,
______________________________________
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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) | 1992-04-17 | 1992-10-17 | 1993-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-17 | 1996-10-17 | 1997-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-17 | 2000-10-17 | 2001-04-18 | $7700.00 | Window Closed / Lapsed |