Patent US4166644A successfully refreshed from Google Patents.
US4166644A
Expired / Lapsed
US
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Pressure-sensitive record material containing urea-formaldehyde resin pigment
Assignee: WTA Inc
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Filing: 1977-06-21
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Granted: 1979-09-04
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Expires: 1997-06-21
Abstract
Abstract Improved print speed and image intensity are obtained in a pressure-sensitive record sheet material by incorporating a cross-linked urea-formaldehyde agglomerated resin pigment in the coated surface of the acid-reacting sheet. A typical formulation of the coating comprises kaolin clay, a zinc-modified phenol-formaldehyde resin, said urea-formaldehyde resin pigment and a suitable binder. When contacted under pressure with a surface containing microscopic rupturable capsules of a colorless chromogeneous material, a colored mark is formed by transfer of the colorless chromogeneous material to the acidic pigment coating.
Inventors
- 👤 Daniel J. Kay
- 👤 Rashmikant R. Patel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:56
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/124; B41M5/132; B41M5/155; Y; Y10; Y10S; Y10S428/00; Y10S428/914; Y10T; Y10T428/00; Y10T428/25; Y10T428/252; Y10T428/253; Y10T428/254; Y10T428/31504; Y10T428/31942; Y10T428/31949; Y10T428/31964; Y10T428/31967; Y10T428/31971; Y10T428/31975; Y10T428/31978; Y10T428/31982
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
80 words
A pressure-sensitive record sheet material comprising a first substrate having a coating of pressure rupturable capsules containing an oily solution of a colorless chromogenic dye precursor and in contiguous relationship therewith a second substrate having a coating comprising kaolin clay, an oil-soluble zinc-modified phenol-formaldehyde resin, about 1 to 25% by weight of a substantially water-insoluble, cross-linked urea-formaldehyde agglomerated resin pigment having a mean agglomerate size of from about 2 to about 10 microns and a latex or starch binder therefor.
Claim 2
Dependent Claim
80 words
A pressure-sensitive record sheet material comprising a first substrate having a coating of pressure rupturable capsules containing an oily solution of a colorless chromogenic dye precursor and in contiguous relationship therewith a second substrate having a coating comprising kaolin clay, an oil-soluble zinc-modified phenol-formaldehyde resin, about 1 to 25% by weight of a substantially water-insoluble, cross-linked urea-formaldehyde agglomerated resin pigment having a mean agglomerate size of from about 2 to about 10 microns and a latex or starch binder therefor.
Claim 3
Dependent Claim
17 words
The pressure-sensitive record sheet material in accordance with claim 1, wherein said substrate is a paper sheet.
Claim 4
Dependent Claim
17 words
The pressure-sensitive record sheet material in accordance with claim 1, wherein said binder is a styrene-butadiene latex.
Claim 5
Dependent Claim
17 words
The pressure-sensitive record sheet material in accordance with claim 1, wherein said formulation further includes calcium carbonate.
Claim 6
Dependent Claim
18 words
The pressure-sensitive record sheet material in accordance with claim 1, wherein said formulation includes starch and a latex.
Claim 7
Dependent Claim
19 words
The pressure-sensitive record sheet material in accordance with claim 1, wherein the first and second substrates are paper sheets.
Claim 8
Dependent Claim
17 words
A manifold assembly comprising a plurality of coated first and second substrates as defined in claim 1.
Claim 9
Dependent Claim
59 words
A pressure-sensitive record sheet material which comprises a substrate coated with a formulation comprising kaolin clay, an oil-soluble metal salt of a phenol-formaldehyde resin, about 1 to 25% by weight of a substantially wateer-insoluble, cross-linked urea-formaldehyde agglomerated resin pigment having a mean agglomerate size of from about 2 to about 10 microns, and a latex or starch binder therefor.
Claim 10
Dependent Claim
59 words
A pressure-sensitive record sheet material which comprises a substrate coated with a formulation comprising kaolin clay, an oil-soluble metal salt of a phenol-formaldehyde resin, about 1 to 25% by weight of a substantially wateer-insoluble, cross-linked urea-formaldehyde agglomerated resin pigment having a mean agglomerate size of from about 2 to about 10 microns, and a latex or starch binder therefor.
Claim 11
Dependent Claim
20 words
The pressure-sensitive record sheet material in accordance with claim 8, wherein the phenol-formaldehyde resin salt is a zinc-modified phenol-formaldehyde resin.
Claim 12
Dependent Claim
28 words
The pressure-sensitive record sheet material in accordance with claim 8, wherein said urea-formaldehyde resin pigment has a mean agglomerate size of from about 7 to about 9 microns.
Claim 13
Dependent Claim
31 words
The pressure-sensitive record sheet material in accordance with claim 8, wherein the BET specific surface area of said urea-formaldehyde resin pigment is about 40 to about 75 square meters per gram.
Claim 14
Dependent Claim
30 words
The pressure-sensitive record sheet material in accordance with claim 8, wherein the molar ratio of urea to formaldehyde in said urea-formaldehyde resin pigment is from about 1:1.3 to about 1:1.8.
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) | 1982-09-03 | 1983-03-05 | 1983-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-09-03 | 1987-03-05 | 1987-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-09-03 | 1991-03-05 | 1991-09-04 | $7700.00 | Window Closed / Lapsed |