US4295851A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of negligibly dusty preparation
Assignee: BASF Corp
•
Filing: 1980-06-17
•
Granted: 1981-10-20
•
Expires: 2000-06-17
Abstract
Abstract Described is a process for the production of negligibly dusty preparations by spray drying an aqueous suspension containing at least one water-soluble dye or optical brightener and optionally further additives, characterized in that a dust-binding surface active agent is added to the aqueous suspension containing at least one adhesive as e.g. sorbitol and/or to the spray-dried product.
Inventors
- 👤 Konrad Neumann
- 👤 Ernst Schenkenberger
- 👤 Friedrich Resch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:32
CPC Classifications
C; C09; C09B; C09B67/00; C09B67/0071; C09B67/0092; C09B67/0001; C09B67/0003; D; D06; D06L; D06L4/00; D06L4/60; D06L4/664
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
113 words
A process for the production of negligibly dusty preparations by spray drying an aqueous suspension consisting essentially of water, at least one water-soluble dye or optical brightner, at least one water-soluble adhesive containing at least five hydroxyl groups per molecule wherein said adhesive softens or melts in the temperature range of 30°-150° C., and in the presence or absence of diluting agents, dispersing agents, stabilisers against oxidative or reductive effects, pH-adjusting acids, bases or buffering agents; and wherein a dust-binding water-soluble surface-active agent is added to said aqueous suspension, or said dust-binding water-soluble surface-active agent is added to the spray-dried product, or partially to said aqueous suspension and partially to the spray-dried product.
Claim 2
Dependent Claim
113 words
A process for the production of negligibly dusty preparations by spray drying an aqueous suspension consisting essentially of water, at least one water-soluble dye or optical brightner, at least one water-soluble adhesive containing at least five hydroxyl groups per molecule wherein said adhesive softens or melts in the temperature range of 30°-150° C., and in the presence or absence of diluting agents, dispersing agents, stabilisers against oxidative or reductive effects, pH-adjusting acids, bases or buffering agents; and wherein a dust-binding water-soluble surface-active agent is added to said aqueous suspension, or said dust-binding water-soluble surface-active agent is added to the spray-dried product, or partially to said aqueous suspension and partially to the spray-dried product.
Claim 3
Dependent Claim
18 words
Process according to claim 1, wherein the aqueous suspension contains at least one adhesive and a dust-binding agent.
Claim 4
Dependent Claim
20 words
Process according to claim 1, wherein the dust-binding agent is added to the product after this has been spray dried.
Claim 5
Dependent Claim
27 words
Process according to claim 1, wherein the dust-binding agent is added partially to the aqueous suspension containing at least one adhesive and partially to the spray-dried product.
Claim 6
Dependent Claim
29 words
Process according to claim 1, wherein the adhesive is added in amounts of 10 to 50 percent by weight, relative to the dry final product, to the aqueous suspension.
Claim 7
Dependent Claim
27 words
Process according to claim 1, wherein the dust-binding agent is used in an amount of 1 to 15 percent by weight, relative to the dry final product.
Claim 8
Dependent Claim
21 words
Process according to claim 1, wherein the dye used is a cationic dye in the form of a moist press cake.
Claim 9
Dependent Claim
15 words
Process according to claim 1, wherein the adhesive used is dextrin, sorbitol or polyvinyl alcohol.
Claim 10
Dependent Claim
21 words
Process according to claim 1, wherein the dust-binding agent used is a condensation product from an aliphatic alcohol with ethylene oxide.
Claim 11
Dependent Claim
20 words
Process according to claim 1, wherein the dust-binding agent used is a condensation product from an alkylphenol with ethylene oxide.
Claim 12
Dependent Claim
20 words
Process according to claim 1, wherein the dust-binding agent used is a condensation product from fatty acid with ethylene oxide.
Claim 13
Dependent Claim
20 words
Process according to claim 1, wherein polethylene glycols, fatty acid amides or fatty acid ethanolamides are used as dust-binding agents.
Claim 14
Dependent Claim
18 words
Process according to claim 1, wherein the dust-binding agent is finely or coarsely sprayed onto the spray-dried product.
Claim 15
Dependent Claim
28 words
Process according to claim 13, wherein the dust-binding agent is heated to about 60°-100° C. and is then applied to the spray-dried product heated to about 60°-85° C.
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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) | 1984-10-19 | 1985-04-20 | 1985-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-19 | 1989-04-20 | 1989-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-19 | 1993-04-20 | 1993-10-20 | $7700.00 | Window Closed / Lapsed |