US4038097A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modified clay paper coating
Assignee: Amcol International Corp
•
Filing: 1975-03-14
•
Granted: 1977-07-26
•
Expires: 1995-03-14
Abstract
Abstract A modified clay paper coating composition comprising a montmorillonite clay having at least partially hydrolyzed aluminum chloride bonded thereto is made by treating montmorillonite clay with a non-aqueous solution of anhydrous aluminum chloride following by hydrolyzing with hot water. A paper substrate coated with this composition exhibits improved image light fastness when employed in a pressure-sensitive duplication system.
Inventors
- 👤 James T. Traxler
- 👤 Emil Patrick Lira
- 👤 John F. Kraemer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:59
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/124; B41M5/132; B41M5/155; B41M5/1555; C; C09; C09C; C09C1/00; C09C1/40; C09C1/42; C01; C01P; C01P2004/00; C01P2004/80; C01P2006/00; C01P2006/60; Y; Y10; Y10S; Y10S428/00; Y10S428/914; Y10T; Y10T428/00; Y10T428/25; Y10T428/256; Y10T428/259; Y10T428/31504; Y10T428/31678; Y10T428/31703
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
49 words
A modified clay composition for use in pressure-sensitive duplication systems, said composition comprising montmorillonite clay having aluminum chloride bonded thereto, at least 30% of said aluminum chloride being hydrolyzed, whereby the image formed by reacting said composition with a color-developing substance has increased fade resistance upon exposure to light.
Claim 2
Dependent Claim
49 words
A modified clay composition for use in pressure-sensitive duplication systems, said composition comprising montmorillonite clay having aluminum chloride bonded thereto, at least 30% of said aluminum chloride being hydrolyzed, whereby the image formed by reacting said composition with a color-developing substance has increased fade resistance upon exposure to light.
Claim 3
Dependent Claim
12 words
The composition of claim 1 wherein said montmorillonite clay is sodium bentonite.
Claim 4
Dependent Claim
67 words
A process for making a modified clay composition for use in pressure-sensitive duplication systems, said process comprising treating a montmorillonite clay with a non-aqueous solution of anhydrous aluminum chloride to bond said aluminum chloride to said clay, and hydrolyzing at least 30% of the bonded aluminum chloride, whereby the image formed by reacting said composition with a color-developing substance has increased fade resistance upon exposure to light.
Claim 5
Dependent Claim
67 words
A process for making a modified clay composition for use in pressure-sensitive duplication systems, said process comprising treating a montmorillonite clay with a non-aqueous solution of anhydrous aluminum chloride to bond said aluminum chloride to said clay, and hydrolyzing at least 30% of the bonded aluminum chloride, whereby the image formed by reacting said composition with a color-developing substance has increased fade resistance upon exposure to light.
Claim 6
Dependent Claim
12 words
The process of claim 3 wherein said montmorillonite clay is sodium bentonite.
Claim 7
Dependent Claim
107 words
A process for making a modified clay for use in pressure-sensitive duplication systems, said process comprising dispersing a montmorillonite clay in a non-aqueous solvent to form a first slurry, treating said first slurry with anhydrous aluminum chloride to bond said aluminum chloride to said clay, recovering the aluminum chloride-treated montmorillonite clay solids from said first slurry, redispersing the aluminum-chloride treated montmorillonite clay solids in water to form a second slurry, heating said second slurry to a temperature of about 30° C. to about 100° C., to hydrolyze at least 30% of the aluminum chloride, and recovering the partially hydrolyzed aluminum chloride-containing montmorillonite clay from said second slurry.
Claim 8
Dependent Claim
107 words
A process for making a modified clay for use in pressure-sensitive duplication systems, said process comprising dispersing a montmorillonite clay in a non-aqueous solvent to form a first slurry, treating said first slurry with anhydrous aluminum chloride to bond said aluminum chloride to said clay, recovering the aluminum chloride-treated montmorillonite clay solids from said first slurry, redispersing the aluminum-chloride treated montmorillonite clay solids in water to form a second slurry, heating said second slurry to a temperature of about 30° C. to about 100° C., to hydrolyze at least 30% of the aluminum chloride, and recovering the partially hydrolyzed aluminum chloride-containing montmorillonite clay from said second slurry.
Claim 9
Dependent Claim
13 words
A process according to claim 5 wherein said montmorillonite clay is sodium bentonite.
Claim 10
Dependent Claim
24 words
The process of claim 5 wherein said non-aqueous solvent is selected from the group consisting of carbon tetrachloride, chloroform, diethyl ether, benzene and nitrobenzene.
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) | 1980-07-25 | 1981-01-24 | 1981-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-25 | 1985-01-24 | 1985-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-25 | 1989-01-24 | 1989-07-26 | $7700.00 | Window Closed / Lapsed |