US4155773A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing pigmented resin particles
Assignee: Hercules LLC
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Filing: 1977-07-12
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Granted: 1979-05-22
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Expires: 1997-07-12
Abstract
Abstract A process for producing pigmented resin particles which are readily dispersible in fluid ink systems is described. The process involves the steps of milling pigment and certain water-insoluble, alcohol-soluble resins in aqueous medium in the presence of a small amount of certain organic solvents of Class III which have a solubility parameter within the range of the resin and a water solubility of 0.1 to about 5.0 grams/100 grams of water at 20° C., separating the resulting particles from the aqueous medium and recovering the particles.
Inventors
- 👤 Richard M. Ferrill, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:05
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/02; C09D11/03; C09D11/037; C09B; C09B67/00; C09B67/006; C09B67/0071; C09B67/0092; C09B67/0095
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
105 words
A process for producing pigmented resin particles which are readily dispersible by stirring in fluid ink systems, which process comprises milling pigment and at least one water-insoluble, alcohol-soluble resin at a pigment: resin weight ratio of 0.8:1 to 2.5:1 in aqueous medium in the presence of from 10 to 50% by weight of said resin of at least one alcohol which is a solvent for said resin and has a water solubility at 20° C. of 0.5 to about 5.0 grams/100 grams of water, until an intimate dispersion of pigmented resin particles is formed, separating the particles from the aqueous medium, and recovering the particles.
Claim 2
Dependent Claim
105 words
A process for producing pigmented resin particles which are readily dispersible by stirring in fluid ink systems, which process comprises milling pigment and at least one water-insoluble, alcohol-soluble resin at a pigment: resin weight ratio of 0.8:1 to 2.5:1 in aqueous medium in the presence of from 10 to 50% by weight of said resin of at least one alcohol which is a solvent for said resin and has a water solubility at 20° C. of 0.5 to about 5.0 grams/100 grams of water, until an intimate dispersion of pigmented resin particles is formed, separating the particles from the aqueous medium, and recovering the particles.
Claim 3
Dependent Claim
12 words
The process of claim 1 wherein the pigment is an organic pigment.
Claim 4
Dependent Claim
20 words
The process of claim 2 wherein the alcohol is selected from the group consisting of n-hexanol, cyclohexanol, and benzyl alcohol.
Claim 5
Dependent Claim
24 words
The process of claim 3 wherein the resin is selected from the group consisting cellulose ethers, cellulose esters, rosin esters, and poly(fatty acid amides).
Claim 6
Dependent Claim
15 words
The process of claim 4 wherein the aqueous medium also contains at least one surfactant.
Claim 7
Dependent Claim
19 words
The process of claim 5 which includes the step of removing the alcohol from the particles prior to recovery.
Claim 8
Dependent Claim
14 words
The process of claim 6 wherein the recovered particles are ground to a powder.
Claim 9
Dependent Claim
14 words
The process of claim 7 wherein at least one resin is a cellulose ether.
Claim 10
Dependent Claim
12 words
The process of claim 8 wherein the cellulose ether is ethyl cellulose.
Claim 11
Dependent Claim
13 words
The process of claim 7 wherein the resin is a poly(fatty acid amide).
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) | 1982-05-21 | 1982-11-20 | 1983-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-05-21 | 1986-11-20 | 1987-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-05-21 | 1990-11-20 | 1991-05-22 | $7700.00 | Window Closed / Lapsed |