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US4071375A
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Process for preparing stable aqueous dispersions of rosin-base material
Assignee: Arakawa Rinsan Kagaku Kogyo KK
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Filing: 1976-10-14
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Granted: 1978-01-31
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Expires: 1996-10-14
Abstract
Abstract A process for preparing a stable aqueous dispersion of rosin-base material by dissolving in a water-immiscible organic solvent a rosin-base material composed of 0 to 95 wt. % of rosin and 100 to 5 wt. % of an adduct of rosin and α,β-unsaturated carboxylic acid or anhydride thereof, dispersing the organic solvent solution in water in the presence of a dispersant and removing the organic solvent from the resulting emulsion, the process being characterized in that the dispersant in an alkali metal salt of a half alkyl sulfate.
Inventors
- 👤 Shuhei Ishibe
- 👤 Toshiharu Okumichi
- 👤 Yasushi Ishihara
- 👤 Hisayoshi Naka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:01
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/03; C08J3/07; D; D21; D21H; D21H17/00; D21H17/62; C08J2393/00
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
88 words
A process for preparing a stable aqueous dispersion of rosin-base material by dissolving in a water-immiscible organic solvent a rosin-base material composed of 0 to 95 wt. % of rosin and 100 to 5 wt. % of an adduct of rosin and α,β-unsaturated carboxylic acid or anhydride thereof, dispersing the organic solvent solution in water in the presence of a dispersant and removing the organic solvent from the resulting emulsion, the process being characterized in that the dispersant is an alkali metal salt of a half alkyl sulfate.
Claim 2
Dependent Claim
88 words
A process for preparing a stable aqueous dispersion of rosin-base material by dissolving in a water-immiscible organic solvent a rosin-base material composed of 0 to 95 wt. % of rosin and 100 to 5 wt. % of an adduct of rosin and α,β-unsaturated carboxylic acid or anhydride thereof, dispersing the organic solvent solution in water in the presence of a dispersant and removing the organic solvent from the resulting emulsion, the process being characterized in that the dispersant is an alkali metal salt of a half alkyl sulfate.
Claim 3
Dependent Claim
28 words
A process as defined in claim 1 wherein the alkyl group in the alkali metal salt of half alkyl sulfate is one having 8 to 22 carbon atoms.
Claim 4
Dependent Claim
17 words
A process as defined in claim 2 wherein the alkyl group has 10 to 16 carbon atoms.
Claim 5
Dependent Claim
15 words
A process as defined in claim 2 wherein the alkali metal salt is sodium salt.
Claim 6
Dependent Claim
25 words
A process as defined in claim 4 wherein the sodium salt is sodium salt of half dodecyl sulfate or sodium salt of half myristyl sulfate.
Claim 7
Dependent Claim
32 words
A process as defined in claim 1 wherein the alkali metal salt of half alkyl sulfate is used in an amount of 0.2 to 5 wt. % based on the rosin-base material.
Claim 8
Dependent Claim
32 words
A process as defined in claim 6 wherein the alkali metal salt of half alkyl sulfate is used in an amount of 0.5 to 3 wt. % based on the rosin-base material.
Claim 9
Dependent Claim
27 words
A process as defined in claim 1 wherein the solvent is at least one member selected from the group consisting of benzene, toluene, cyclohexane and carbon tetrachloride.
Claim 10
Dependent Claim
23 words
A process as defined in claim 1 wherein the solvent solution contains about 20 to about 70 wt. % of the rosin-base material.
Claim 11
Dependent Claim
24 words
A process as defined in claim 1 wherein the organic solvent solution is dispersed in water at a temperature of 10° to 80° C.
Claim 12
Dependent Claim
26 words
A process as defined in claim 1 wherein the organic solvent solution is dispersed in water with use of a high-pressure homogenizer of the piston type.
Claim 13
Dependent Claim
21 words
A process as defined in claim 11 wherein the output pressure of the homogenizer is 100 to 600 kg/cm 2 .
Claim 14
Dependent Claim
23 words
A process as defined in claim 1 wherein the despersion finally obtained substantially contains 1 to 60 wt. % of the rosin-base material.
Claim 15
Dependent Claim
12 words
A stable aqueous dispersion produced by the process claimed in claim 1.
References Cited (Backward Citations)
US3565755A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-01-30 | 1981-08-01 | 1982-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-30 | 1985-08-01 | 1986-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-30 | 1989-08-01 | 1990-01-31 | $7700.00 | Window Closed / Lapsed |