US3879335A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of pigmented resin powders
Assignee: BASF SE
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Filing: 1972-08-14
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Granted: 1975-04-22
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Expires: 1992-08-14
Abstract
Abstract Production of pigmented resin powders by finely dispersing dispersions of pigments in solutions of polymeric materials in at least one organic solvent in water containing a protective colloid while supplying mixing energy, and removing the solvent. A preferred method is to introduce one or more jets of water containing protective colloid at the rate of 5 to 100 m/sec into animpulse exchange chamber together with the dispersion issuing in the immediate vicinity of the orifice(s), and to remove the solvent. The method avoids crosslinking and provides pigmented resin powders of consistently reproducible color which are suitable for conventional powdered-resin coating methods.
Inventors
- 👤 Gerhard Storck
- 👤 Horst Diefenbach
- 👤 Matthias Marx
- 👤 Otto Nagel
- 👤 Heribert Kuerten
- 👤 Werner Weinle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:32
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/03; C09B; C09B63/00; C09B67/00; C09B67/0001; C09B67/0003; C09B67/0071; C09B67/0092; C09B67/0095
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
11 words
A PROCESS FOR THE MANUFACTURE OF PIGMENTED RESIN POWDERS WHICH COMPRISES:
Claim 2
Dependent Claim
11 words
A PROCESS FOR THE MANUFACTURE OF PIGMENTED RESIN POWDERS WHICH COMPRISES:
Claim 3
Dependent Claim
174 words
MIXING (A) A DISPERSION OF A PIGMENT IN A POLYMERIC SUBSTANCE DISSOLVED IN A SOLVENT, AND (B) WATER CONTAINING FROM 0.01 TO 5.0 PERCENT W/W OF A WATER-SOLUBLE PROTECTIVE COLLOID BY INTRODUCING AT LEAST ONE JET OF WATER CONTAINING SAID PROTECTIVE COLLOID AT THE RATE OF 5 TO 100 M/SEC THROUGH THE INNER ORIFICE OF ONE OR MORE NOZZLES HAVING AN INNER AND AN OUTER CONCENTRIC NOZZLE ORIFICE. INTO AN IMPULSE EXCHANGE CHAMBER LOCATED IN A MIXING TANK, BOTH SAID CHAMBER AND SAID TANK BEING FILLED WITH WATER CONTAINING SAID PROTECTIVE COLLOID AND EXTENDING IN THE DIRECTION OF ENTRY OF THE JET OF WATER TOGETHER WITH SAID DISPERSION WHICH IS INTRODUCED INTO SAID IMPULSE EXCHANGE CHAMBER THROUGH SAID OUTER CONCENTRIC NOZZLE ORIFICE, THE MEANS HYDRAULIIC DIAMETER OF SAID IMPULSE EXCHANGE CHAMBER BEING FROM 2 TO 20 TIMES THE DIAMETER OF THE INNER NOZZLE ORIFICE, AND ITS LENGTH BEING FROM 2 TO 30 TIMES ITS HYDRAULIC DIAMETER, WHEREBY SAID POLYMERIC SUBSTANCE CONTAINING SAID PIGMENT IS PRECIPITATED FROM SAID SOLVENT IN THE FORM OF PARTICLES; AND
Claim 4
Dependent Claim
174 words
MIXING (A) A DISPERSION OF A PIGMENT IN A POLYMERIC SUBSTANCE DISSOLVED IN A SOLVENT, AND (B) WATER CONTAINING FROM 0.01 TO 5.0 PERCENT W/W OF A WATER-SOLUBLE PROTECTIVE COLLOID BY INTRODUCING AT LEAST ONE JET OF WATER CONTAINING SAID PROTECTIVE COLLOID AT THE RATE OF 5 TO 100 M/SEC THROUGH THE INNER ORIFICE OF ONE OR MORE NOZZLES HAVING AN INNER AND AN OUTER CONCENTRIC NOZZLE ORIFICE. INTO AN IMPULSE EXCHANGE CHAMBER LOCATED IN A MIXING TANK, BOTH SAID CHAMBER AND SAID TANK BEING FILLED WITH WATER CONTAINING SAID PROTECTIVE COLLOID AND EXTENDING IN THE DIRECTION OF ENTRY OF THE JET OF WATER TOGETHER WITH SAID DISPERSION WHICH IS INTRODUCED INTO SAID IMPULSE EXCHANGE CHAMBER THROUGH SAID OUTER CONCENTRIC NOZZLE ORIFICE, THE MEANS HYDRAULIIC DIAMETER OF SAID IMPULSE EXCHANGE CHAMBER BEING FROM 2 TO 20 TIMES THE DIAMETER OF THE INNER NOZZLE ORIFICE, AND ITS LENGTH BEING FROM 2 TO 30 TIMES ITS HYDRAULIC DIAMETER, WHEREBY SAID POLYMERIC SUBSTANCE CONTAINING SAID PIGMENT IS PRECIPITATED FROM SAID SOLVENT IN THE FORM OF PARTICLES; AND
Claim 5
Dependent Claim
16 words
removing said solvent and said water from said particles whereby a pigmented resin powder is formed.
Claim 6
Dependent Claim
16 words
removing said solvent and said water from said particles whereby a pigmented resin powder is formed.
Claim 7
Dependent Claim
16 words
REMOVING SAID SOLVENT AND SAID WATER FROM SAID PARTICLES WHEREBY A PIGMENTED RESIN POWDER IS FORMED.
Claim 8
Dependent Claim
16 words
REMOVING SAID SOLVENT AND SAID WATER FROM SAID PARTICLES WHEREBY A PIGMENTED RESIN POWDER IS FORMED.
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) | 1978-04-21 | 1978-10-21 | 1979-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-21 | 1982-10-21 | 1983-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-21 | 1986-10-21 | 1987-04-22 | $7700.00 | Window Closed / Lapsed |