US4223060A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure-sensitive copying paper
Assignee: Wiggins Teape UK PLC
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Filing: 1978-12-01
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Granted: 1980-09-16
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Expires: 1998-12-01
Abstract
Abstract Self-contained pressure-sensitive copying material having a coating which contains both a particulate mineral color-developing material and microcapsules enclosing a solution of a colorless color former which is reactive with the color developing material to produce a colored product, in which the particles of color developing material (e.g. an acidic clay) and optionally the microcapsules as well, are chemically treated with a protective agent to inhibit premature color development wherein the protective agent may be a self-crosslinkable polymer, such as an aminoplast polymer (e.g. a urea-formaldehyde or melamine-formaldehyde polymer), or an epichlorohydrin polymer (e.g. an aminoepichlorohydrin or an amide/aminoepichlorohydrin polymer), or an anionic surfactant (e.g. a lauryl sulphate salt or a sulphonated ricinoleic acid derivative, a dodecyl benzene sulphonate salt, or a dibutyl or dioctyl ester of sulphosuccinic acid), or a fluorine-containing paper sizing agent, or a non-self-crosslinkable polymer which is a wet-strength agent for paper (e.g. a polyethylene imine resin).
Inventors
- 👤 Paul R. Raine
- 👤 Lawrence Westcott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:07
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/124; B41M5/132; B41M5/155; B41M5/1555; Y; Y10; Y10S; Y10S428/00; Y10S428/914; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24835; Y10T428/24893; Y10T428/24901; Y10T428/25; Y10T428/254; Y10T428/27; Y10T428/273; Y10T428/29; Y10T428/2982; Y10T428/2984; Y10T428/2985; Y10T428/2987
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
97 words
Pressure-sensitive copying material comprising a sheet material on which is a layer of a coating composition comprising: (a) microcapsules containing a solution of a colourless colour former, (b) particular mineral colour developing material which has been chemically treated with a protective agent in an amount less than about 10% based on the weight of said particulate mineral colour developing material and which is effective in inhibiting premature colour development, said protective agent being characterized as being compatible with said microcapsules and by being substantially non-interfering with the colour-developing properties of said colour developing material, and (c) binder.
Claim 2
Dependent Claim
97 words
Pressure-sensitive copying material comprising a sheet material on which is a layer of a coating composition comprising: (a) microcapsules containing a solution of a colourless colour former, (b) particular mineral colour developing material which has been chemically treated with a protective agent in an amount less than about 10% based on the weight of said particulate mineral colour developing material and which is effective in inhibiting premature colour development, said protective agent being characterized as being compatible with said microcapsules and by being substantially non-interfering with the colour-developing properties of said colour developing material, and (c) binder.
Claim 3
Dependent Claim
16 words
The pressure-sensitive copying material of claim 1 wherein said protective agent is a polyethylene imine resin.
Claim 4
Dependent Claim
17 words
The pressure-sensitive copying material of claim 1 wherein said protective agent is a fluorine-containing paper sizing agent.
Claim 5
Dependent Claim
29 words
The pressure-sensitive copying material of claim 1 wherein said protective agent is an anionic surfactant having a group selected from the group consisting of sulphate groups and sulphonate groups.
Claim 6
Dependent Claim
45 words
The pressure-sensitive copying material of claim 4 wherein said anionic surfactant is selected from the group consisting of a sulphonated ricinoleic acid derivative, a lauryl sulphate salt, a dodecyl benzene sulphonate salt, a dibutyl ester of sulphosuccinic acid, and a dioctyl ester of sulphosuccinic acid.
Claim 7
Dependent Claim
15 words
The pressure-sensitive copying material of claim 1 wherein said protective agent is a self-crosslinkable polymer.
Claim 8
Dependent Claim
26 words
The pressure-sensitive copying material of claim 6 wherein the coating composition has a dry coatweight in the range of from 10 to 15 g/m 2 .
Claim 9
Dependent Claim
15 words
The pressure-sensitive copying material of claim 6 wherein said self-crosslinkable polymer is an aminoplast polymer.
Claim 10
Dependent Claim
30 words
The pressure-sensitive copying material of claim 8 wherein said aminoplast polymer is derived from one member of the group consisting of (1) melamine and formaldehyde, and (2) urea and formaldehyde.
Claim 11
Dependent Claim
14 words
The pressure-sensitive copying material of claim 6 wherein the binder comprises hydrolyzed polyvinyl alcohol.
Claim 12
Dependent Claim
18 words
The pressure-sensitive copying material of claim 10 wherein the coating composition further comprises a dispersant and stilt material.
Claim 13
Dependent Claim
15 words
The pressure-sensitive copying material of claim 6 wherein the self-crosslinkable polymer is an epichlorohydrin polymer.
Claim 14
Dependent Claim
25 words
The pressure-sensitive copying material of claim 12 wherein the epichlorohydrin polymer is selected from the group consisting of an aminoepichlorohydrin polymer and an amide/aminoepichlorohydrin copolymer.
Claim 15
Dependent Claim
132 words
Pressure-sensitive copying material comprising a sheet material on which is a layer of a coating composition comprising: (a) microcapsules containing a solution of a colourless colour former, said microcapsules having been chemically treated with a first protective agent, (b) particulate mineral colour developing material which has been chemically treated with a second protective agent, and (c) a binder, wherein said first and second protective agents are present in an amount which is less than about 10% based on the total weight of said particulate mineral colour developing material and the dry weight of said microcapsules, said amount being effective in inhibiting premature colour development, said first and second protective agents being characterized by being compatible with said microcapsules and by being substantially non-interfering with the colour-developing properties of said colour developing material.
Claim 16
Dependent Claim
132 words
Pressure-sensitive copying material comprising a sheet material on which is a layer of a coating composition comprising: (a) microcapsules containing a solution of a colourless colour former, said microcapsules having been chemically treated with a first protective agent, (b) particulate mineral colour developing material which has been chemically treated with a second protective agent, and (c) a binder, wherein said first and second protective agents are present in an amount which is less than about 10% based on the total weight of said particulate mineral colour developing material and the dry weight of said microcapsules, said amount being effective in inhibiting premature colour development, said first and second protective agents being characterized by being compatible with said microcapsules and by being substantially non-interfering with the colour-developing properties of said colour developing material.
Claim 17
Dependent Claim
19 words
The pressure-sensitive copying material of claim 14 wherein the first and second protective agents are a polyethylene imine resin.
Claim 18
Dependent Claim
20 words
The pressure-sensitive copying material of claim 14 wherein the first and second protective agents are a fluorine-containing paper sizing agent.
Claim 19
Dependent Claim
32 words
The pressure-sensitive copying material of claim 14 wherein the first and second protective agents are an anionic surfactant having a group selected from the group consisting of sulphate groups and sulphonate groups.
Claim 20
Dependent Claim
45 words
The pressure-sensitive copying material of claim 17 wherein said anionic surfactant is selected from the group consisting of a sulphonated ricinoleic acid derivative, a lauryl sulphate salt, a dodecyl benzene sulphonate salt, a dibutyl ester of sulphosuccinic acid and a dioctyl ester of sulphosuccinic acid.
Claim 21
Dependent Claim
17 words
The pressure-sensitive copying material of claim 14 wherein said first and second protective agents are self-crosslinkable polymers.
Claim 22
Dependent Claim
19 words
The pressure-sensitive copying material of claim 19 wherein said first and second protective agents are the same self-crosslinkable polymer.
Claim 23
Dependent Claim
26 words
The pressure-sensitive copying material of claim 20 wherein the coating composition has a dry coatweight in the range of from 10 to 15 g/m 2 .
Claim 24
Dependent Claim
15 words
The pressure-sensitive copying material of claim 20 wherein said self-crosslinkable polymer is an aminoplast polymer.
Claim 25
Dependent Claim
30 words
The pressure-sensitive copying material of claim 22 wherein said aminoplastic polymer is derived from one member of the group consisting of (1) melamine and formaldehyde, and (2) urea and formaldehyde.
Claim 26
Dependent Claim
14 words
The pressure-sensitive copying material of claim 20 wherein said binder is hydrolyzed polyvinyl alcohol.
Claim 27
Dependent Claim
18 words
The pressure-sensitive copying material of claim 24 wherein the coating composition further comprises a dispersant and stilt material.
Claim 28
Dependent Claim
15 words
The pressure-sensitive copying material of claim 20 wherein the self-crosslinkable polymer is an epichlorohydrin polymer.
Claim 29
Dependent Claim
25 words
The pressure-sensitive copying material of claim 26 wherein the epichlorohydrin polymer is selected from the group consisting of an aminoepichlorohydrin polymer and an amide/aminoepichlorohydrin copolymer.
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) | 1983-09-16 | 1984-03-17 | 1984-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-09-16 | 1988-03-17 | 1988-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-09-16 | 1992-03-17 | 1992-09-16 | $7700.00 | Window Closed / Lapsed |