US4191680A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of concentrated formulations
Assignee: Rohner AG Pratteln
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Filing: 1978-07-11
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Granted: 1980-03-04
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Expires: 1998-07-11
Abstract
Abstract Process for the manufacture of concentrated formulations which are in the form of free-flowing, low-dust powders or granules and are easily dispersible in aqueous and/or organic media, starting from active ingredients which are sparingly soluble or insoluble in water.
Inventors
- 👤 Jacques Wegmann
- 👤 Hans D. Kirner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 16:15
CPC Classifications
C; C09; C09B; C09B67/00; C09B67/0071; C09B67/0092; C09B67/0095; C08; C08J; C08J3/00; C08J3/20; C08J3/22; C08J3/226; D; D06; D06L; D06L4/00; D06L4/60; D06L4/664
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
174 words
A process for the manufacture of aqueous and/or organic dispersible, free-flowing, and low-dusting concentrated formulations in powder or granular form of at least one ingredient which is sparingly soluble or insoluble in water, comprising the steps of: (i) mechanically and/or chemically comminuting said ingredient in an aqueous medium, in the presence of a grinding auxiliary comprising a dissolved, water soluble salt of an acid resin, until a mean particle size of less than 5 μm is reached; (ii) forming a two-phase system with said aqueous medium by adding, during or after comminution, at least one organic solvent which has a limited solubility, of at least 1% to 50%, in the aqueous medium; (iii) turbulently mixing the resulting two-phase system with at least one sparingly water-soluble, or water-insoluble, high-molecular carrier; (iv) reducing the volume of the organic phase, said organic phase containing said carrier and said ingredient by adding further water, until the formulation particles formed are no longer tacky; (v) separating off said formulation particles; and (vi) rinsing off with water said separated particles.
Claim 2
Dependent Claim
174 words
A process for the manufacture of aqueous and/or organic dispersible, free-flowing, and low-dusting concentrated formulations in powder or granular form of at least one ingredient which is sparingly soluble or insoluble in water, comprising the steps of: (i) mechanically and/or chemically comminuting said ingredient in an aqueous medium, in the presence of a grinding auxiliary comprising a dissolved, water soluble salt of an acid resin, until a mean particle size of less than 5 μm is reached; (ii) forming a two-phase system with said aqueous medium by adding, during or after comminution, at least one organic solvent which has a limited solubility, of at least 1% to 50%, in the aqueous medium; (iii) turbulently mixing the resulting two-phase system with at least one sparingly water-soluble, or water-insoluble, high-molecular carrier; (iv) reducing the volume of the organic phase, said organic phase containing said carrier and said ingredient by adding further water, until the formulation particles formed are no longer tacky; (v) separating off said formulation particles; and (vi) rinsing off with water said separated particles.
Claim 3
Dependent Claim
27 words
The process according to claim 1, wherein said ingredient comprises at least one member selected from the group consisting of water-insoluble dyestuffs, water-insoluble optical brighteners, and pigments.
Claim 4
Dependent Claim
52 words
The process according to claim 1 or 2, wherein said grinding auxiliary comprises from 0.5 to 20% by weight, relative to said ingredient of at least one dissolved water-soluble salt selected from the group consisting of a copolymer of maleic acid, a condensation product of maleic acid and a maleic acid derivative.
Claim 5
Dependent Claim
105 words
The process according to claim 1 wherein said grinding auxiliary is at least one alkali metal salt or ammonium salt of a member selected from the group consisting of (i) a condensation product of maleic acid with a resin acid and at least one polyhydric alcohol, and (ii) a copolymer of maleic acid with at least one olefinically unsaturated compound, and wherein said comminuting step further includes the presence of at most 5% by weight, relative to said ingredient of at least one member selected from the group consisting of an anionic dispersant, a non-ionic dispersant an anionic wetting agent, and a non-ionic wetting agent.
Claim 6
Dependent Claim
39 words
The process according to claim 1 wherein the concentration of said ingredient is from 20 to 60% by weight, relative to the aqueous medium, and wherein said comminuting is accomplished by wet grinding means including sand, balls or mills.
Claim 7
Dependent Claim
50 words
The process according to claim 1 wherein said organic solvent is at least one member selected from the group consisting of an alcohol, a ketone, an aldehyde, an ester, an ether, a nitrile and a nitroalkane and wherein said solvent has a solubility in water of from 10 to 50%.
Claim 8
Dependent Claim
42 words
The process according to claim 1 wherein said aqueous medium contains an electrolyte and wherein said organic solvent is miscible with pure water in all proportions but has a limited solubility of at least 1%, in said aqueous medium containing said electrolyte.
Claim 9
Dependent Claim
60 words
The process according to claim 1 wherein said carrier is at least one member selected from the group consisting of an ester of cellulose an ether of cellulose, a polyvinyl acetal, a polyolefine, a polyamide, a polyurethane, a polyester, a polyacrylic compound, a polyvinyl compound, and an acid or basic synthetic resin which can be converted to a water-soluble form.
Claim 10
Dependent Claim
25 words
A formulation, in the form of an aqueous and/or organic dispersible, free-flowing, low-dust powder, which has been manufactured by the process according to claim 1.
Claim 11
Dependent Claim
19 words
The formulation according to claim 9, wherein said formulation contains from 20 to 90% by weight of said ingredient.
Claim 12
Dependent Claim
27 words
Use of a formulation according to claim 9 or 10 for the manufacture of a finely divided dispersion of the ingredient in an aqueous or organic medium.
Claim 13
Dependent Claim
14 words
The process of claim 1 further including the step of drying said rinsed particles.
Claim 14
Dependent Claim
20 words
The process of claim 3 wherein said grinding auxiliary comprises from 1 to 20% by weight relative to said ingredient.
Claim 15
Dependent Claim
23 words
The process of claim 7 wherein said organic solvent has a solubility of 10 to 50% in said aqueous medium containing said electrolyte.
References Cited (Backward Citations)
US3449284A
Cited
US3769257A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-03-04 | 1983-09-03 | 1984-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-03-04 | 1987-09-03 | 1988-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-03-04 | 1991-09-03 | 1992-03-04 | $7700.00 | Window Closed / Lapsed |