US4010292A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of self-contained carbonless copy record sheets
Assignee: Individual
•
Filing: 1975-08-28
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Granted: 1977-03-01
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Expires: 1995-08-28
Abstract
Abstract In accordance with certain of its aspects, the novel process of this invention for making pressure-sensitive record sheets comprises the steps of forming a dispersion of microcapsules, the microcapsules being the product of microencapsulating a solution of a color precursor in an oil carrier; the walls of the microcapsules being substantially oil and water impermeable; forming an aqueous mixture containing a color developer for the encapsulated color precursor; adding a color suppressant to the dispersion of microcapsules, to the aqueous mixture or partially to both in an amount or amounts effective to substantially prevent color formation between the color developer and any unencapsulated color precursor; the color suppressant being a nitrogen containing basic organic compound selected from the group consisting of: amines, imines and aziridines; combining the aqueous mixture containing the color developer, the color suppressant and the microcapsules to form an aqueous coating composition; and applying the aqueous coating composition to a substrate in a single pass through substrate coating apparatus. In accordance with certain other aspects of this invention, the novel product of this invention is an aqueous slurry for coating pressure-sensitive record sheets, the novel slurry including a plurality of microcapsules, the microcapsules containing a solution of a color precursor in an oil carrier, the walls of the microcapsules comprising a reaction product of a wall forming compound and a cross-linking agent; a color developer for the color precursor; and a color suppressant comprising a nitrogen containing basic organic compound selected from the group consisting of: amines, imines and aziridines, the color suppressant being present in the aqueous slurry in an amount sufficient to substantially prevent color formation between the color developer and any unencapsulated color precursor.
Inventors
- 👤 Dale Richard Shackle
- 👤 Gerhart Schwab
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:29
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/124; B41M5/132; B41M5/165; Y; Y10; Y10S; Y10S428/00; Y10S428/914
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
134 words
A process for making pressure sensitive sheets comprising the steps of: a. forming a dispersion of microcapsules, said microcapsules being the product of microencapsulating a solution of a color precursor in an oil carrier, the walls of said microcapsules being substantially oil and water impermeable; b. forming an aqueous mixture containing a color developer for said color precursor; c. adding a color suppressant to said aqueous mixture in an amount equal to from about 0.1 percent to about 5.0 percent of the dry weight of the coating composition, said color suppressant being a nitrogen containing basic organic compound selected from the group consisting of: amines, polyethylenimines and aziridines; d. mixing said dispersion of microcapsules and said aqueous mixture to form an aqueous coating composition; and e. applying said aqueous coating composition to a substrate.
Claim 2
Dependent Claim
134 words
A process for making pressure sensitive sheets comprising the steps of: a. forming a dispersion of microcapsules, said microcapsules being the product of microencapsulating a solution of a color precursor in an oil carrier, the walls of said microcapsules being substantially oil and water impermeable; b. forming an aqueous mixture containing a color developer for said color precursor; c. adding a color suppressant to said aqueous mixture in an amount equal to from about 0.1 percent to about 5.0 percent of the dry weight of the coating composition, said color suppressant being a nitrogen containing basic organic compound selected from the group consisting of: amines, polyethylenimines and aziridines; d. mixing said dispersion of microcapsules and said aqueous mixture to form an aqueous coating composition; and e. applying said aqueous coating composition to a substrate.
Claim 3
Dependent Claim
12 words
The process of claim 1 wherein said color suppressant is polyfunctional aziridine.
Claim 4
Dependent Claim
24 words
The process of claim 1 wherein the walls of said microcapsules are a reaction product of the combination of hydroxypropylcellulose with a cross-linking agent.
Claim 5
Dependent Claim
74 words
The process of claim 1 wherein the walls of said microcapsules are formed by the reaction of a polyvalent polyisocyanate with a second wall forming compound, said second wall forming compound being selected from the group consisting of epoxy compounds, acid anhydride compounds, compounds having at least two groups selected from the group consisting of a hydroxyl group, a thiol group, an amino group, and a carboxylic acid group, and prepolymers of said compounds.
Claim 6
Dependent Claim
26 words
The process of claim 1 wherein said aqueous mixture containing said color developer further includes a binder for binding said microcapsules into an aqueous coating position.
Claim 7
Dependent Claim
16 words
The process of claim 1 wherein an optical brightener is added to said aqueous coating composition.
Claim 8
Dependent Claim
37 words
The process of claim 1 wherein said color suppressant is added to said aqueous coating composition in an amount equal to from about 0.5 percent to about 4.0 percent of the dry weight of the coating composition.
Claim 9
Dependent Claim
18 words
The process of claim 1 further comprising drying said substrate after said aqueous coating composition has been applied.
Claim 10
Dependent Claim
133 words
A process for making pressure-sensitive sheets comprising the steps of: a. forming a dispersion of microcapsules, said microcapsules being the product of microencapsulating a solution of color precursor in an oil carrier, the walls of said microcapsules being substantially oil and water impermeable; b. forming an aqueous mixture containing a color developer for said color precursor; c. adding a color suppressant to said dispersion of microcapsules in an amount equal to from about 0.1 percent to about 5.0 percent of the dry weight of the coating composition, said color supressant being a nitrogen containing basic organic compound selected from the group consisting of: amines, polyethylenimines and aziridines; d. mixing said dispersion of microcapsules and said aqueous mixture to form an aqueous coating composition; and e. applying said aqueous coating composition to a substrate.
Claim 11
Dependent Claim
133 words
A process for making pressure-sensitive sheets comprising the steps of: a. forming a dispersion of microcapsules, said microcapsules being the product of microencapsulating a solution of color precursor in an oil carrier, the walls of said microcapsules being substantially oil and water impermeable; b. forming an aqueous mixture containing a color developer for said color precursor; c. adding a color suppressant to said dispersion of microcapsules in an amount equal to from about 0.1 percent to about 5.0 percent of the dry weight of the coating composition, said color supressant being a nitrogen containing basic organic compound selected from the group consisting of: amines, polyethylenimines and aziridines; d. mixing said dispersion of microcapsules and said aqueous mixture to form an aqueous coating composition; and e. applying said aqueous coating composition to a substrate.
Claim 12
Dependent Claim
12 words
The process of claim 8 wherein said color suppressant is polyfunctional aziridine.
Claim 13
Dependent Claim
24 words
The process of claim 9 wherein the walls of said microcapsules are a reaction product of the combination of hydroxypropylcellulose with a cross-linking agent.
Claim 14
Dependent Claim
74 words
The process of claim 9 wherein the walls of said microcapsules are formed by the reaction of a polyvalent polyisocyanate with a second wall forming compound, said second wall forming compound being selected from the group consisting of epoxy compounds, acid anhydride compounds, compounds having at least two groups selected from the group consisting of a hydroxyl group, a thiol group, an amino group, and a carboxylic acid group, and prepolymers of said compounds.
Claim 15
Dependent Claim
26 words
The process of claim 9 wherein said aqueous mixture containing said color developer further includes a binder for binding said microcapsules into an aqueous coating position.
Claim 16
Dependent Claim
16 words
The process of claim 9 wherein an optical brightener is added to said aqueous coating composition.
Claim 17
Dependent Claim
37 words
The process of claim 9 wherein said color suppressant is added to said aqueous coating composition in an amount equal to from about 0.5 percent to about 4.0 percent of the dry weight of the coating composition.
Claim 18
Dependent Claim
153 words
A process for making pressure-sensitive record sheets comprising the steps of: a. forming a dispersion of microcapsules, said microcapsules being the product of microencapsulating a solution of a color precursor in an oil carrier, the walls of said microcapsules being substantially oil and water impermeable; b. forming an aqueous mixture containing a color developer for said color precursor; c. adding a color suppressant to said aqueous mixture in an amount equal to from about 0.5 percent to about 4.0 percent of the dry weight of the coating composition, said color suppressant being a nitrogen containing basic organic compound selected from the group consisting of: amines, polyethylenimines and aziridines and; d. mixing said dispersion of microcapsules and said aqueous mixture with a binder to form an aqueous coating composition; e. adding an optical brightener to said aqueous coating composition; f. applying said aqueous coating composition to a substrate; and g. drying said coated substrate.
Claim 19
Dependent Claim
153 words
A process for making pressure-sensitive record sheets comprising the steps of: a. forming a dispersion of microcapsules, said microcapsules being the product of microencapsulating a solution of a color precursor in an oil carrier, the walls of said microcapsules being substantially oil and water impermeable; b. forming an aqueous mixture containing a color developer for said color precursor; c. adding a color suppressant to said aqueous mixture in an amount equal to from about 0.5 percent to about 4.0 percent of the dry weight of the coating composition, said color suppressant being a nitrogen containing basic organic compound selected from the group consisting of: amines, polyethylenimines and aziridines and; d. mixing said dispersion of microcapsules and said aqueous mixture with a binder to form an aqueous coating composition; e. adding an optical brightener to said aqueous coating composition; f. applying said aqueous coating composition to a substrate; and g. drying said coated substrate.
Claim 20
Dependent Claim
12 words
The process of claim 14 wherein said color suppressant is polyfunctional aziridine.
Claim 21
Dependent Claim
21 words
The process of claim 16 wherein the walls of said microcapsules are a reaction product of hydroxypropylcellulose and a cross-linking agent.
Claim 22
Dependent Claim
74 words
The process of claim 16 wherein the walls of said microcapsules are formed by the reaction of a polyvalent polyisocyanate with a second wall forming compound, said second wall forming compound being selected from the group consisting of epoxy compounds, acid anhydride compounds, compounds having at least two groups selected from the group consisting of a hydroxyl group, a thiol group, an amino group, and a carboxylic acid group, and prepolymers of said compounds.
Claim 23
Dependent Claim
153 words
A process for making pressure-sensitive record sheets comprising the steps of: a. forming a dispersion of microcapsules, said microcapsules being the product of microencapsulating a solution of a color precursor in an oil carrier, the walls of said microcapsules being substantially oil and water impermeable; b. forming an aqueous mixture containing a color developer for said color precursor; c. adding a color supressant to said dispersion of microcapsules in an amount equal to from about 0.5 percent to about 4.0 percent of the dry weight of the coating composition, said color suppressant being a nitrogen containing basic organic compound selected from the group consisting of: amines, polyethylenimines and aziridines; d. mixing said dispersion of microcapsules and said aqueous mixture with a binder to form an aqueous coating composition; e. adding an optical brightener to said aqueous coating composition; f. applying said aqueous coating composition to a substrate; and g. drying said coated substrate.
Claim 24
Dependent Claim
153 words
A process for making pressure-sensitive record sheets comprising the steps of: a. forming a dispersion of microcapsules, said microcapsules being the product of microencapsulating a solution of a color precursor in an oil carrier, the walls of said microcapsules being substantially oil and water impermeable; b. forming an aqueous mixture containing a color developer for said color precursor; c. adding a color supressant to said dispersion of microcapsules in an amount equal to from about 0.5 percent to about 4.0 percent of the dry weight of the coating composition, said color suppressant being a nitrogen containing basic organic compound selected from the group consisting of: amines, polyethylenimines and aziridines; d. mixing said dispersion of microcapsules and said aqueous mixture with a binder to form an aqueous coating composition; e. adding an optical brightener to said aqueous coating composition; f. applying said aqueous coating composition to a substrate; and g. drying said coated substrate.
Claim 25
Dependent Claim
176 words
A process for making pressure-sensitive record sheets comprising the steps of: a. forming a dispersion of microcapsules, said microcapsules being a product of microencapsulating a solution of crystal violet lactone in an oil carrier, the walls of said microcapsules being a reaction product of hydroxypropylcellulose and a cross-linking agent, said microcapsules walls being substantially oil and water impermeable; b. combining an oil soluble phenolformaldehyde novolak resin color developer and a binder into an aqueous dispersion, said oil soluble phenolformaldehyde novolak resin being a ground solid; c. adding a polyfunctional aziridine color suppressant to said aqueous dispersion, said polyfunctional aziridine being added to said aqueous dispersion in an amount equal to from about 0.5 percent to about 4.0 percent of the dry weight of the coating composition; d. mixing said dispersion of microcapsules and said aqueous dispersion to form an aqueous coating composition; e. adding an optical brightener to said aqueous coating composition; f. applying said aqueous coating composition to a substrate; g. drying said coated substrate, said drying being by means of the application of heat.
Claim 26
Dependent Claim
176 words
A process for making pressure-sensitive record sheets comprising the steps of: a. forming a dispersion of microcapsules, said microcapsules being a product of microencapsulating a solution of crystal violet lactone in an oil carrier, the walls of said microcapsules being a reaction product of hydroxypropylcellulose and a cross-linking agent, said microcapsules walls being substantially oil and water impermeable; b. combining an oil soluble phenolformaldehyde novolak resin color developer and a binder into an aqueous dispersion, said oil soluble phenolformaldehyde novolak resin being a ground solid; c. adding a polyfunctional aziridine color suppressant to said aqueous dispersion, said polyfunctional aziridine being added to said aqueous dispersion in an amount equal to from about 0.5 percent to about 4.0 percent of the dry weight of the coating composition; d. mixing said dispersion of microcapsules and said aqueous dispersion to form an aqueous coating composition; e. adding an optical brightener to said aqueous coating composition; f. applying said aqueous coating composition to a substrate; g. drying said coated substrate, said drying being by means of the application of heat.
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) | 1980-02-29 | 1980-08-30 | 1981-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-02-29 | 1984-08-30 | 1985-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-02-29 | 1988-08-30 | 1989-03-01 | $7700.00 | Window Closed / Lapsed |