US3919110A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Colored organic synthetic pigments and method for producing same
Assignee: Champion International Corp
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Filing: 1972-11-08
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Granted: 1975-11-11
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Expires: 1992-11-08
Abstract
Abstract Colored, synthetic, organic pigments are provided which comprise discrete, substantially spherical, air-containing microcapsules having an average particle diameter below about two microns and substantially continuous solid walls with a dye material incorporated in the wall or an oil-dispersible pigment provided in the core of the microcapsule. Such colored pigments are produced by providing an oil-soluble dye or oil-dispersible pigment in the oily phase of the emulsion that is employed to provide oil-containing microcapsules which are activated by heating to drive the oil from said microcapsules and replace it by air to provide air-containing pigments. Alternatively, a water-soluble dye may be incorporated in an aqueous dispersion of the oil-containing microcapsules.
Inventors
- 👤 Anthony E Vassiliades
- 👤 Edward F Nauman
- 👤 Shrenik Shroff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:37
CPC Classifications
C; C09; C09B; C09B67/00; C09B67/0097; B; B01; B01J; B01J13/00; B01J13/02; B01J13/20; B01J13/203; D; D21; D21H; D21H19/00; D21H19/36; D21H19/38; D21H19/42; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2984; Y10T428/2985; Y10T428/2987; Y10T428/2989
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
37 words
COLORED, SYNTHETIC, ORGANIC PIGMENTS CONSISTING ESSENTIALLY OF DISCRETE, SUBSTANTIALLY SPHERICAL, AIR-CONTAINING MICRO CAPSULES HAVING AN AVERAGE PARTICLE DIAMETER BELOW ABOUT TWO MICRONS, SAID MICROCAPSULES HAVING SUBSTANTIALLY CONTINUOUS, ORGANIC, POLYMERIC, SOLID WALLS HAVING A DYE MATERIAL INCORPORATED THEREIN.
Claim 2
Dependent Claim
37 words
COLORED, SYNTHETIC, ORGANIC PIGMENTS CONSISTING ESSENTIALLY OF DISCRETE, SUBSTANTIALLY SPHERICAL, AIR-CONTAINING MICRO CAPSULES HAVING AN AVERAGE PARTICLE DIAMETER BELOW ABOUT TWO MICRONS, SAID MICROCAPSULES HAVING SUBSTANTIALLY CONTINUOUS, ORGANIC, POLYMERIC, SOLID WALLS HAVING A DYE MATERIAL INCORPORATED THEREIN.
Claim 3
Dependent Claim
28 words
The synthetic pigments of claim 1 wherein the dye material is the residue of an oil-soluble dye and is incorporated in the inside surface of the capsular wall.
Claim 4
Dependent Claim
14 words
The synthetic pigments of claim 2 wherein the capsular wall comprises a hydrophobic starch.
Claim 5
Dependent Claim
14 words
The synthetic pigment of claim 3 wherein said hydrophobic starch is a benzyl-substituted starch.
Claim 6
Dependent Claim
34 words
The synthetic pigments of claim 2 wherein the caPsular wall comprises either gum arabic, gum tragacanth, agar, gelatin, hydroxyethyl cellulose, methyl cellulose, polyvinyl pyrrolidone or the copolymer of methyl vinyl ether and maleic anhydride.
Claim 7
Dependent Claim
22 words
The synthetic pigments of claim 1 wherein said microcapsules have an average particle diameter of between about 0.25 and about 0.8 micron.
Claim 8
Dependent Claim
40 words
Colored, synthetic, organic pigments consisting essentially of discrete, substantially spherical, air-containing microcapsules having an average particle diameter below about two microns, said microcapsules having substantially continuous, organic, polymeric, solid walls and containing a non-white oil-dispersible pigment in the microcapsular core.
Claim 9
Dependent Claim
40 words
Colored, synthetic, organic pigments consisting essentially of discrete, substantially spherical, air-containing microcapsules having an average particle diameter below about two microns, said microcapsules having substantially continuous, organic, polymeric, solid walls and containing a non-white oil-dispersible pigment in the microcapsular core.
Claim 10
Dependent Claim
14 words
The synthetic pigments of claim 7 wherein said capsular wall comprises a hydrophobic starch.
Claim 11
Dependent Claim
14 words
The synthetic pigments of claim 8 wherein said hydrophobic starch is a benzyl-substituted starch.
Claim 12
Dependent Claim
34 words
The synthetic pigments of claim 7 wherein said capsular wall comprises either gum arabic, gum tragacanth, agar, gelatin, hydroxyethyl cellulose, methyl cellulose, polyvinyl pyrrolidone or the copolymer of methyl vinyl ether and maleic anhydride.
Claim 13
Independent Claim
85 words
A METHOD FOR THE PRODUCTION OF DISCRETE, COLORED, SYNTHETIC PIGMENTS WHICH COMPRISES PROVIDING SUBSTANTIALLY SPHERICAL, PRECURSOR, MICROCAPSULES HAVING SUBSTANTIALLY CONTINUOUS, ORGANIC, POLYMERIC, SOLD WALLS AND AN OILY CORE MATERIAL CONTAINING A MEMBER SELECTED FROM THE GROUP CONSISTING OF NON-WHITE OIL-DISPERSIBLE PIGMENTS, OILSOLUBLE DYES, AND WATER-SOLUBLE DYES SAID PRECURSOR MICROCAPSULES HAVING AN AVERAGE PARTICLE DIAMETER BELOW ABOUT TWO MICRONS, AND HEATING SAID MICROCAPSULES TO A TEMPERATURE SUFFICIENT TO SUBSTANTIALLY COMPLETELY DRIVE OFF SAID OILY CORE MATERIAL FROM SAID MICROCAPSULES IN ORDER TO PROVIDE AIR-CONTAINING, COLORED PIGMENTS.
Claim 14
Independent Claim
85 words
A METHOD FOR THE PRODUCTION OF DISCRETE, COLORED, SYNTHETIC PIGMENTS WHICH COMPRISES PROVIDING SUBSTANTIALLY SPHERICAL, PRECURSOR, MICROCAPSULES HAVING SUBSTANTIALLY CONTINUOUS, ORGANIC, POLYMERIC, SOLD WALLS AND AN OILY CORE MATERIAL CONTAINING A MEMBER SELECTED FROM THE GROUP CONSISTING OF NON-WHITE OIL-DISPERSIBLE PIGMENTS, OILSOLUBLE DYES, AND WATER-SOLUBLE DYES SAID PRECURSOR MICROCAPSULES HAVING AN AVERAGE PARTICLE DIAMETER BELOW ABOUT TWO MICRONS, AND HEATING SAID MICROCAPSULES TO A TEMPERATURE SUFFICIENT TO SUBSTANTIALLY COMPLETELY DRIVE OFF SAID OILY CORE MATERIAL FROM SAID MICROCAPSULES IN ORDER TO PROVIDE AIR-CONTAINING, COLORED PIGMENTS.
Claim 15
Dependent Claim
12 words
The method of claim 11 wherein said core contains an oil-soluble dye.
Claim 16
Dependent Claim
18 words
The method of claim 11 wherein the core of the precursor microcapsules is provided with non-white oil-dispersible pigment.
Claim 17
Dependent Claim
13 words
The method of claim 11 wherein said capsular walls comprise a hydrophobic starch.
Claim 18
Dependent Claim
13 words
The method of claim 14 wherein said hydrophobic starch is a benzyl-substituted starch.
Claim 19
Dependent Claim
33 words
The method of claim 11 wherein said capsular walls comprise either gum arabic, gum tragacanth, agar, gelatin, hydroxyethyl cellulose, methyl cellulose, polyvinyl pyrrolidone or the copolymer of methyl vinyl ether and maleic anhydride.
Claim 20
Independent Claim
79 words
A method for the production of synthetic, organic, colored microcapsular pigments which comprises adding a water-soluble dye to an aqueous dispersion of precursor microcapsules consisting essentially of substantially spherical, microcapsules having substantially continuous, organic, polymeric, solid walls enclosing an oily core material, said microcapsules having an average particle diameter below about two microns, and heating said microcapsules to a temperature sufficient to substantially completely drive off said oily core material from said microcapsules to provide dyed, air-containing microcapsular pigments.
Claim 21
Independent Claim
79 words
A method for the production of synthetic, organic, colored microcapsular pigments which comprises adding a water-soluble dye to an aqueous dispersion of precursor microcapsules consisting essentially of substantially spherical, microcapsules having substantially continuous, organic, polymeric, solid walls enclosing an oily core material, said microcapsules having an average particle diameter below about two microns, and heating said microcapsules to a temperature sufficient to substantially completely drive off said oily core material from said microcapsules to provide dyed, air-containing microcapsular pigments.
Claim 22
Dependent Claim
13 words
The method of claim 17 wherein said capsular walls comprise a hydrophobic starch.
Claim 23
Dependent Claim
13 words
The method of claim 18 wherein said hydrophobic starch is a benzyl-substituted starch.
Claim 24
Dependent Claim
33 words
The method of claim 17 wherein said capsular walls comprise either gum arabic, gum tragacanth, agar, gelatin, hydroxyethyl cellulose, methyl cellulose, polyvinyl pyrrolidone or the copolymer of methyl vinyl ether and maleic anhydride.
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) | 1978-11-10 | 1979-05-12 | 1979-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-10 | 1983-05-12 | 1983-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-10 | 1987-05-12 | 1987-11-11 | $7700.00 | Window Closed / Lapsed |