US4289332A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recording sheet
Assignee: Fujifilm Holdings Corp
•
Filing: 1979-08-09
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Granted: 1981-09-15
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Expires: 1999-08-09
Abstract
Abstract A recording sheet capable of forming a color when brought into contact with an electron donating color former, which is prepared by coating a dispersion comprising (1) a polyvalent metal salt of an aromatic carboxylic acid, (2) a montmorillonite clay mineral, (3) zinc oxide, and (4) a binder, and which contains about 30 to 60 wt. % solid ingredients and has a viscosity of about 50 to 7,000 cps.
Inventors
- 👤 Hajime Kato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:41
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; Y10T428/256; Y10T428/259; Y10T428/27; Y10T428/273
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
87 words
A recording sheet capable of forming color when brought into contact with an electron donating color former, which comprises a support having coated thereon a layer prepared from a coating composition comprising a polyvalent metal salt of an aromatic carboxylic acid, a montmorillonite clay mineral containing about 10 to 20 parts by weight of aluminum per 100 parts by weight of silicon, zinc oxide, and a binder and which contains about 30 to 60 wt% solid ingredients and has a viscosity of about 50 to 7,000 cps.
Claim 2
Dependent Claim
87 words
A recording sheet capable of forming color when brought into contact with an electron donating color former, which comprises a support having coated thereon a layer prepared from a coating composition comprising a polyvalent metal salt of an aromatic carboxylic acid, a montmorillonite clay mineral containing about 10 to 20 parts by weight of aluminum per 100 parts by weight of silicon, zinc oxide, and a binder and which contains about 30 to 60 wt% solid ingredients and has a viscosity of about 50 to 7,000 cps.
Claim 3
Dependent Claim
107 words
The recording sheet of claim 1, wherein said polyvalent metal salt of an aromatic carboxylic acid is a salt of an aromatic carboxylic acid represented by the formula (I) ##STR2## wherein R 1 , R 2 , R 3 , R 4 and R 5 each represents a hydrogen atom, a halogen atom, a hydroxy group, an amino group, an alkylamino group, an acylamino group, a nitro group, a formyl group, an alkyl group, an aryl group, an alkylaryl group, an aralkyl group, an alkoxy group, or R 1 and R 2 or R 3 and R 4 may combine to form a 5- or 6-membered ring.
Claim 4
Dependent Claim
43 words
The recording sheet of claim 2, wherein at least one of R 1 and R 5 represents a hydroxy group and the o- or p-position with respect to the hydroxy is substituted by an alkyl group, an aryl group or an aralkyl group.
Claim 5
Dependent Claim
71 words
The recording sheet of claim 1, wherein said montmorillonite clay is represented by the formula x.sub.m (Y.sup.2+, Y.sup.3+).sub.2-3. Z.sub.4 O.sub.10 (HO).sub.2.SH.sub.2 O wherein X is K, Na, or Ca; Y.sup.(2+) is Mg, Fe 2+ , Mn 2+ , Ni, Zn, Li; Y.sup.(3+) is Al, Fe 3+ , Mn 3+ , Cr 3+ ; Z is Si or Al; the average of m is 1/3; S is the number of interlayer water.
Claim 6
Dependent Claim
38 words
The recording sheet of claim 1, wherein said montmorillonite clay mineral is present in said layer in an amount of about 10 to 10,000 parts by weight per 100 parts by weight of said aromatic carboxylic acid salt.
Claim 7
Dependent Claim
30 words
The recording sheet of claim 1, wherein said composition additionally contains a water soluble salt selected from the group consisting of zinc, aluminum, calcium and magnesium salts of strong acids.
Claim 8
Dependent Claim
19 words
The recording sheet of claim 1, wherein said coating composition has a pH of not more than about 10.
Claim 9
Dependent Claim
33 words
The recording sheet of claim 1, wherein said zinc oxide is present in an amount of about 1 to 1,000 parts by weight per 100 parts by weight of said montmorillonite clay mineral.
Claim 10
Dependent Claim
21 words
The recording sheet of claim 1, wherein the solids in said layer have a particle size not larger than about 10μ.
Claim 11
Dependent Claim
22 words
The recording sheet of claim 1, wherein said binder is a combination of a polymer containing a hydroxy group and a latex.
Claim 12
Dependent Claim
37 words
The recording sheet of claim 10, wherein said polymer containing a hydroxy group is a starch or polyvinyl alcohol having a saponification degree of about 80 to 100 and a polymerization degree of about 200 to 3,000.
Claim 13
Dependent Claim
14 words
The recording sheet of claim 12, wherein said latex is a carboxy-modified SBR latex.
Claim 14
Dependent Claim
35 words
The recording sheet of claim 1, wherein said binder is present in an amount of not more than about 50 parts by weight per 100 parts by weight of the solids making up said layer.
Claim 15
Dependent Claim
30 words
The recording sheet of claim 1, wherein said composition is coated on a support in an amount of about 0.03 to 6 g aromatic carboxylic acid salt per square meter.
Claim 16
Dependent Claim
78 words
In a recording material comprising an electron donating color former and an electron accepting color developer dispersed in one or more layers on one or more supports, the improvement which comprises a color developer layer prepared from a coating composition comprising a polyvalent metal salt of an aromatic carboxylic acid, montmorillonite clay mineral, zinc oxide and a binder and which contains about 30 to 60 wt% solid ingredients and has a viscosity of about 50 to 7,000 cps.
Claim 17
Dependent Claim
78 words
In a recording material comprising an electron donating color former and an electron accepting color developer dispersed in one or more layers on one or more supports, the improvement which comprises a color developer layer prepared from a coating composition comprising a polyvalent metal salt of an aromatic carboxylic acid, montmorillonite clay mineral, zinc oxide and a binder and which contains about 30 to 60 wt% solid ingredients and has a viscosity of about 50 to 7,000 cps.
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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) | 1984-09-14 | 1985-03-16 | 1985-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-09-14 | 1989-03-16 | 1989-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-09-14 | 1993-03-16 | 1993-09-15 | $7700.00 | Window Closed / Lapsed |