Patent US5236624A successfully refreshed from Google Patents.
US5236624A
Expired / Lapsed
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Dispersions and emulsions
Assignee: ExxonMobil Chemical Patents Inc
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Filing: 1990-06-29
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Granted: 1993-08-17
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Expires: 2010-06-29
Abstract
Abstract Dispersions of hydrophobic substance e.s. resin emulsions, usually having a relatively low average particle size can be continuously and speedily prepared by feed a hydrophobic substance in the liquid state into at least two static mixers, arranged in a series. The resin is introduced at a temperature above 50 degrees C. but below its degradation temperature of hydrophobic substance and water under pressure is introduced into the first mixer. The mixture of resin and water is passed to another mixer maintained at a temperature lower than that prevailing in the first mixer and below the boiling point of water. Optionally aqueous solution of surfactant under pressure instead of water is introduced into the first mixer and optionally aqueous surfactant is introduced into the second mixer.
Inventors
- 👤 Andre Lepert
- 👤 Jacques Mourand
- 👤 Alain J. M. Rauline
- 👤 Thierry Lapie
- 👤 Jean L. Marchal
- 👤 Graham Yeadon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:01
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/03; C08J2395/00; Y; Y10; Y10S; Y10S516/00; Y10S516/924; Y10S516/928
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
99 words
A process for producing a dispersion of a hydrophobic composition in an aqueous solution, comprising the steps of: (a) mixing the hydrophobic composition with the aqueous solution in a first mixing apparatus, to form a mixture, at a temperature above about 50° C.; (b) pressurizing the mixture to prevent vaporization of the water; (c) transferring said mixture to a second mixing apparatus; and (d) cooling the mixture in said second mixing apparatus to a temperature below the temperature of step (a) and below the boiling point of the aqueous solution at the pressure present in said second mixing apparatus.
Claim 2
Dependent Claim
99 words
A process for producing a dispersion of a hydrophobic composition in an aqueous solution, comprising the steps of: (a) mixing the hydrophobic composition with the aqueous solution in a first mixing apparatus, to form a mixture, at a temperature above about 50° C.; (b) pressurizing the mixture to prevent vaporization of the water; (c) transferring said mixture to a second mixing apparatus; and (d) cooling the mixture in said second mixing apparatus to a temperature below the temperature of step (a) and below the boiling point of the aqueous solution at the pressure present in said second mixing apparatus.
Claim 3
Dependent Claim
28 words
The process of claim 1 wherein the hydrophobic composition is an organic resin with a ring and ball softening point of from about 10° to about 180° C.
Claim 4
Dependent Claim
24 words
The process of claim 1 wherein the mixing of step (a) is carried out at a temperature from about 50° to about 300° C.
Claim 5
Dependent Claim
27 words
The process of claim 1 wherein the hydrophobic composition comprises organic resins, waxes, oxidized waxes, rosins, rosin esters or salts, natural rubbers, synthetic rubbers or mixtures thereof.
Claim 6
Dependent Claim
13 words
The process of claim 1 wherein said mixing apparatus is a static mixer.
Claim 7
Dependent Claim
20 words
The process of claim 5 wherein the speed of the mixture through the static mixer is above about 15 meters/second.
Claim 8
Dependent Claim
13 words
The process of claim 1 further comprising the step of adding a surfactant.
Claim 9
Dependent Claim
26 words
The process of claim 7 wherein the surfactant comprises a cationic surfactant, anionic surfactant, or a mixture thereof, the surfactant having an HLB greater than 12.
Claim 10
Dependent Claim
34 words
The process of claim 7 wherein said mixing, pressurizing, adding and cooling produces a dispersion wherein from about 40 to about 60 percent of the emulsion particles are less than 0.50 microns in size.
Claim 11
Dependent Claim
125 words
A process for producing a dispersion of an organic hydrophobic composition, selected from the group consisting of organic resins, waxes, oxidized waxes, rosins, rosin esters or salts, rubbers, EVA, modified EVA and mixtures thereof, comprising the steps of: (a) mixing the hydrophobic composition with an aqueous solution in a first mixing apparatus to form a mixture, at a temperature above about 50° C.; (b) maintaining said first mixing apparatus at a sufficiently high pressure to prevent vaporization of the aqueous solution; (c) transferring said mixture to a second mixing apparatus; and (d) cooling the mixture in said second mixing apparatus to a temperature below the temperature of step (a) and below the boiling point of water at the pressure present in said second mixing apparatus.
Claim 12
Dependent Claim
125 words
A process for producing a dispersion of an organic hydrophobic composition, selected from the group consisting of organic resins, waxes, oxidized waxes, rosins, rosin esters or salts, rubbers, EVA, modified EVA and mixtures thereof, comprising the steps of: (a) mixing the hydrophobic composition with an aqueous solution in a first mixing apparatus to form a mixture, at a temperature above about 50° C.; (b) maintaining said first mixing apparatus at a sufficiently high pressure to prevent vaporization of the aqueous solution; (c) transferring said mixture to a second mixing apparatus; and (d) cooling the mixture in said second mixing apparatus to a temperature below the temperature of step (a) and below the boiling point of water at the pressure present in said second mixing apparatus.
Claim 13
Dependent Claim
23 words
The process of claim 10 wherein from about 40 to about 60 percent of the dispersion particle size is less than 0.5 microns.
Claim 14
Dependent Claim
27 words
The process of claim 11 further comprising adding a surfactant selected from the cationic surfactants, anionic surfactants and mixtures thereof having an HLB greater than about 12.
Claim 15
Dependent Claim
22 words
The process of claim 12 wherein the hydrophobic composition is in a molten or dissolved state before the mixing of step (a).
Claim 16
Dependent Claim
34 words
The process of claim 12 wherein the amount of 14 in aqueous solution in said step of mixing is from about 10 to about 80 wt.%, based on the weight of the hydrophobic composition.
Claim 17
Dependent Claim
14 words
The process of claim 10 wherein said mixing includes mixing with a polymer latex.
Claim 18
Dependent Claim
20 words
The process of claim 10 further comprising adding a polymer latex after said step of mixing with an aqueous solution.
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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) | 1996-08-16 | 1997-02-15 | 1997-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-08-16 | 2001-02-15 | 2001-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-08-16 | 2005-02-15 | 2005-08-17 | $7700.00 | Window Closed / Lapsed |