WO2002018486A2 - Cellulose hydrophile insoluble utilisee comme agent de modification rheologique dans des liquides immiscibles avec l'eau - Google Patents

Cellulose hydrophile insoluble utilisee comme agent de modification rheologique dans des liquides immiscibles avec l'eau Download PDF

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WO2002018486A2
WO2002018486A2 PCT/US2001/025821 US0125821W WO0218486A2 WO 2002018486 A2 WO2002018486 A2 WO 2002018486A2 US 0125821 W US0125821 W US 0125821W WO 0218486 A2 WO0218486 A2 WO 0218486A2
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cellulose
composition
water
agent
immiscible liquid
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WO2002018486A3 (fr
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You-Lung Chen
Neil A. Morrison
Daniel Burgum
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CP Kelco US Inc
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CP Kelco US Inc
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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
    • C09K8/02—Well-drilling compositions
    • C09K8/32—Non-aqueous well-drilling compositions, e.g. oil-based
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L1/00—Compositions of cellulose, modified cellulose or cellulose derivatives
    • C08L1/02—Cellulose; Modified cellulose
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/03—Powdery paints
    • C09D5/033—Powdery paints characterised by the additives
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/04—Thixotropic paints
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K3/00—Materials not provided for elsewhere

Definitions

  • the present invention relates to a composition comprising hydrophilic insoluble cellulose and certain co-agents, wherein the composition acts as a rheological modifier in water-immiscible liquids.
  • the invention also relates to a process for making the composition and for making the resulting rheologically modified dispersion.
  • the co- agent(s) used in the invention is capable of forming hydrogen bonds with the hydroxyl groups on the surface of the cellulose fiber and is soluble in the water- immiscible liquid.
  • the hydrophilic insoluble cellulose can be produced by bacteria or by chemical and/or mechanical modification of low surface area cellulose derived from cotton, wood pulp, oat fiber, cereal cellulose, corn cellulose, sugar beet and other plant cellulose well-known to one skilled in the art.
  • Rheological modifiers of water-immiscible liquids which include the category of oil thickeners, have long been sought for a number of industrial applications, including use in oil drilling fluids, paint solvents, solvent-born or solvent-free epoxy systems, industrial lubricants and grease, thin film and powder coatings and vegetable oils.
  • Rheological modifiers have the ability to form stable, highly viscous fluids on suspension in water-immiscible liquids..
  • a rheological modifier impart a pseudoplastic character to the liquid that allows for rapid decrease in viscosity under applied shear. It is also important that a rheological modifier be capable of maintaining viscosity and yield stress in pure-oil systems. In addition, it would be advantageous for a rheological modifier to have efficacy at small concentrations, to maintain the integrity of the water- immiscible system which may further potentially provide economic cost-savings benefits. It would also be advantageous for a rheological modifier to be able to maintain viscosity and yield stress under a range of temperature conditions and to provide long-term suspension for an extended shelf-life.
  • polymers as viscosifiers in water-immiscible liquids are well-known in the art.
  • U.S. Patent No. 4,670,501 and U.S. Patent No. 4,777,200 disclose polymeric viscosifiers having a dry weight particle size below 10 ⁇ that are insoluble in water- immiscible liquid but can be swollen by absorbing surrounding water found in the liquid.
  • the polymeric viscosifiers are added as co-agents to the water- immiscible liquid to provide the desired viscosity.
  • the polymeric viscosifiers of these systems have limitations however, in that they require the presence of water and thus cannot function in pure oil systems, and also have limited pseudoplasticity.
  • compositions that are able to rheologically modify water-immiscible liquids without the required presence of water or hydrophilic liquids. It would also be highly desirable if this composition could provide long term suspension of colloids and particles for an extended shelf-life, increased viscosity and yield stress, stability under a range of temperature conditions, highly pseudoplastic character under applied shear and improved efficacy at small concentrations. Co-agents which can be used in the composition to stabilize the rheologically-modified water-immiscible liquids would also be highly desirable.
  • This invention relates to a composition
  • a composition comprising hydrophilic insoluble cellulose and a co-agent capable of forming hydrogen bonds with said hydrophilic insoluble cellulose, wherein said co-agent is soluble in a water- immiscible liquid.
  • This invention is also directed to a process for making the composition.
  • This invention is further directed to a water-immiscible liquid that is rheologically modified by the composition described above, and to applications for the rheologically-modified water-immiscible liquid, such as oil drilling fluids, paint solvents, solvent-born or solvent-free epoxy systems, industrial lubricants and grease, thin film and powder coatings and vegetable oils.
  • hydrophilic insoluble cellulose such as bacterial cellulose
  • hydrophilic insoluble cellulose can serve as rheological modifiers for water-immiscible liquids.
  • the hydroxyl groups on the surface of the cellulose fibers can be stabilized in water-immiscible ⁇ . - b -
  • the resultant solutions have enhanced rheological properties, such as long term suspension stability of colloids and particles for an extended shelf-life, improved stability under a range of temperature conditions, highly pseudoplastic character under applied shear, improved efficacy at small concentrations and most significantly, functionality without the required presence of water or a hydrophilic liquid.
  • Cellulose is a linear polymer of D-glucose in which the sugar residues are connected by ⁇ (l,4) linkages, as represented below:
  • hydrophilic insoluble cellulose refers to cellulose which has an affinity to water but has a solubility of less than about 100 mg per liter in both water and water-immiscible systems.
  • the cellulose of this invention is a high surface area cellulose.
  • High surface area cellulose can be produced by bacteria or by chemical and/or mechanical modification of low surface area cellulose such as cotton, wood pulp, oat fiber, cereal cellulose, corn cellulose, sugar beet - t> -
  • Bacterially produced cellulose because of its source and recovery conditions, has a high surface area that together with certain co-agents can form a well dispersed cellulose network in water-immiscible liquids. This results in a substantial increase in the viscosity of the water-immiscible system and usually in measurable yield stress that must be overcome before a sample will flow.
  • the surface area of most plant derived cellulose is substantially less than the surface area of bacterially produced -cellulose. Because of this, plant derived cellulose materials do not appreciably viscosify aqueous systems unless their surface area is increased.
  • the surface area of plant-derived cellulose may be increased by acid digestion and/or homogenization or extension homogenization at high pressures.
  • the cellulose of this invention is high surface area cellulose produced from bacteria.
  • Bacterially produced cellulose may be obtained directly by bacterial fermentation of Acetobacter xylinum.
  • Cellulose fibers obtained by microbial fermentation of
  • Acetobacter xylinum have an average diameter of about 0.1 ⁇ m and an average length of about 10 to about 15 ⁇ m. In comparison, conventional plant cellulose has an average diameter of about 30 and an average length of about 300 ⁇ m. Consequently, cellulose obtained by bacterial fermentation has up to 200 times more surface area than an equivalent amount of plant derived cellulose.
  • a process for obtaining cellulose by bacterial fermentation from Acetobacter strains is described in U.S. Patent No. 5,079,162 and U.S. Patent No. 5,144,021, the entire contents of which are incorporated by reference herein.
  • Wet cake cellulose, containing approximately 80 to about 90 wt% water can be produced using the methods and conditions disclosed in the above-mentioned patents. Alternative methods of obtaining bacterial cellulose are well-known in the art.
  • Dispersing co-agents may be used in conjunction with cellulose to inhibit the cellulose-to-cellulose interaction and thus enhance the ability of individual fibers to interact with the water-immiscible liquid. It is believed that the co-agent interacts with the hydroxyl groups on the glucose moieties by hydrogen bonding, resulting in the formation of cellulose fiber having a hydrophobic surface, which in turn allows for improved dispersion and stabilization of the cellulose/co-agent composition in the water-immiscible liquid.
  • water-immiscible liquid refers to any non-aqueous or hydrophobic solvent which separates from solution into two distinct phases when mixed with water.
  • the water-immiscible liquid may be, for example, a chlorinated hydrocarbon, but is generally non-polar and is preferably a mineral oil, vegetable oil, refined kerosene, diesel oil, paraffin oil, white spirit or aviation crude oil, oil of an oil-based paint, grease, solvent-born or solvent-free epoxy systems, thin film and powder coating, or other water-immiscible liquids well known in the art.
  • co-agents are commonly added to cellulose prior to and during activation in the water- ir ⁇ iiscifole liquid to reduce the formation of inter- cellulose associations during the activation process.
  • High shear dispersion, or "activation” is used to thoroughly mix the cellulose and co-agent in a solvent to increase the cellulose surface area and to form a smooth, uniform dispersion. Activation is typically accomplished by a homogenizer, but in some instances, as in the case of bacterial cellulose, a high shear mixer is adequate.
  • the term "activated” describes a process in which the 3- dimensional structure of cellulose is dispersed in the solvent such that the cellulose imparts to the fluid composition such properties as thickening, increased yield stress, heat stability, suspension properties, freeze-thaw stability, flow control, foam stabilization, coating and film formation, and the like.
  • the activation “teases apart” the cellulose fibers to expand the cellulose to create a network of highly intermeshed fibers with a very high surface area.
  • the expanded cellulose, formed by activation significantly modifies the properties of the base solvent or composition, thereby "activating" it.
  • the co-agents of the present invention must (a) be capable of forming hydrogen bonds with the hydrophilic insoluble cellulose, and (b) be soluble in water- immiscible liquid.
  • the co-agents are surfactants, such as long- chain fatty acids, fatty acid derivatives, mono- and di- glycerides, alkylamines and alcohols.
  • the co-agents are long chain alkylamines, or mixtures of long-chain alkylamines, Preferably, the alkylamines are long chain amines comprising four to thirty carbons. Most preferably, the long chain amine comprises eight to eighteen carbons .
  • the most preferred surfactant co-agents of this invention are dodecylamine or mono- or di- glycerides.
  • the co-agents are polymers, such as alkylated polyvinylpyrrolidones that are graft copolymers prepared from -olefins, e.g., polyvinylpyrrolidone-graft-hexadecene (PVPGH) or 1- ethenylhexadecyl or eicosene or tricontanyl, which are sold commercially as GANEX ® polymers by ISP Corporation in Wayne, NJ.
  • the polymers tend to be high molecular weight compounds which disperse less easily than surfactants.
  • the polymer is a homopolymer such as polyvinyl pyrrolidone or any other suitable homopolymer well-known in the art.
  • both surfactants and polymers are present as co-agents in the invention.
  • both surfactants and polymers are present as co-agents, both must be charge- compatible, meaning that they must either be both anionic, both cationic, or one may be neutral.
  • the weight ratio of co-agent, or mixture of co-agents, to cellulose ranges from 1:4 to 30:1, and is most preferably 1:2 to 10:1.
  • increasing the temperature increases the dispersability of the co-agents and cellulose in the solvent.
  • the solubility of the co-agents in the water- immiscible liquid need not be high.
  • the co- agents of the invention have a solubility of at least 500 mg per liter in the water-immiscible liquid.
  • activation of the cellulose with the co-agent first takes place in a water-miscible solvent. Once activated in a water-miscible solvent, the cellulose/co-agent composition can then be added to the water-immiscible liquid and re-dispersed, or reactivated, by high shear mixing or homogenization.
  • the cellulose/co-agent composition may be tray dried, drum dried or dried by any method well known in the art, prior to re-dispersion in the water- immiscible liquid.
  • at least one co-agent is present prior to or during activation of the cellulose in the water-miscible solvent to form compositions having superior stability and viscosity.
  • the co-agents may be in any form, as solid or liquid, when mixed with the cellulose. If more than one co-agent is used, each additional co-agent may be added to the cellulose either as a mixture with other co-agents or separately, and in any order, either prior to, simultaneously with, or subsequent to dispersion of the cellulose material in the water-miscible solvent.
  • Preparation of the hydrophilic insoluble cellulose slurry involves mixing the cellulose, and possibly a co-agent, in a water-miscible solvent.
  • the cellulose is already in wet cake form containing about 10 to about 20% cellulose and about 80 to about 90% water.
  • the resulting dispersion of wet cake cellulose in water- miscible solvent will generally contain about 0.1 to about 6 wt% cellulose, preferably about 0.5 to about 3 wt% cellulose.
  • water is used as the water-miscible solvent, but other organic solvents may also be used, provided that they are water-miscible.
  • Exemplary water- miscible solvents useful for dispersing cellulose include ethanol, propanol, isobutanol, isopropanol, methyl or dimethyl sulfoxide, butanol and mixtures thereof or with water.
  • the water-miscible solvent is isopropanol or a constant boiling mixture of isopropanol and water.
  • the dispersion contains the water-miscible solvent in an amount from about 50 to about 99 wt%, and preferably in an amount from about 65 to about 97 wt% of the total dispersion.
  • the hydrophilic insoluble cellulose slurry is prepared by mixing the cellulose, the water-miscible solvent and possibly a co-agent, in either a homogenizer, such as an APV Homogenizer® (APV Limited, West Wales, U.K.), in a high shear mixer or in both.
  • a homogenizer such as an APV Homogenizer® (APV Limited, West Wales, U.K.)
  • the cellulose, co-agent and water-miscible solvent are first mixed in a high shear mixer prior to mixing in a homogenizer.
  • the cellulose may be mixed with a co- agent in the water miscible solvent by homogenization, high shear mixing or both.
  • the cellulose and the co-agent preferably combine to make a total weight of about 0.3 wt% to about 50 wt% in the water-miscible solvent, most preferably about 1 wt% to about 30 wt% of the dispersion. While the cellulose is added at a range of 0.1 wt% to about 6 wt%, the co-agent is added at about 0.2 wt% to about 44 wt% of the dispersion.
  • any of a variety of co-agents may be used in combination with the cellulose, as may be required for a specific application.
  • both surfactants and polymers are present as co-agents.
  • the surfactant is dodecylamine or mono- or di-glyceride
  • the polymer is PVPGH or polyvinyl pyrrolidone tricontene (PVPT) .
  • the co-agent is a surfactant or is a plurality of surfactants, then preferably at least one surfactant is added prior to or during activation of the cellulose in the water-miscible solvent.
  • the polymer should be a homopolymer and the solvent should be a less polar water-miscible solvent, such as isopropanol or isobutanol or others well-known in the art.
  • polymer " co-agents are not added to the water-miscible solvent at all, but are added with the cellulose prior to or during re-activation in the water-immiscible liquid.
  • surfactant co-agent is added prior to or during activation of the cellulose in the water-miscible solvent.
  • the remaining surfactants may be added at any time subsequent to activation in the water-miscible solvent, and the polymer or polymers are preferably added directly to the water-immiscible liquid prior to or during activation.
  • Activation of the cellulose, and any possible co-agents, in the water-miscible solvent may be accomplished by a high shear mixing device or a pressure-drop homogenizer or both, as described above.
  • the composition is first mixed in a high shear mixer before being passed through a pressure-drop homogenizer at approximately 8,000 psi for multiple passes, depending on the source of the cellulose and the desired viscosity.
  • the compositions will typically exhibit an increase in viscosity with each successive pass through the homogenizer.
  • For high surface area cellulose produced from bacteria typically only one or two passes is required.
  • high surface area cellulose produced from plants up to fifty passes may be desired.
  • the surface area and viscosity of the cellulose may be adjusted by using methods well-known to one skilled in the art, e.g., adjusting the homogenization pressure as well as the total number of passes through the homogenizer or high shear mixer.
  • the pressure may be increased to as high as 26,000 psi.
  • a high shear mixer may alone be sufficient.
  • the cellulose/co-agent composition may be heated to between about 30°C to about 100°C prior to activation, as required to melt the co-agent and/or aid in dispersion.
  • the resulting slurry can then be transferred directly into the water-immiscible liquid for re-dispersion.
  • the resulting slurry can first be tray dried or drum dried at a temperature below the vaporization point of any added co-agents, generally at temperatures ranging from about 35°C to about 150°C. If dried, the resulting slurry can be milled to a mesh size ranging from about 1.7 mm (about 10 mesh size) to about 0.15 mm (about 200 mesh size) and stored for later re- dispersion in the water-immiscible liquid.
  • the dried form of the resulting cellulose or cellulose/co-agent composition is preferable for storage and ease of transport.
  • the resulting slurry prepared above is then re-dispersed, preferably with polymer co-agents, in a water-immiscible liquid to produce suspensions or dispersions possessing excellent viscosity and yield stress .
  • a polymer added as co-agent
  • the quantity of co-agent or the types of co-agents used in combination with the re-dispersible cellulose will also vary as required for a specific application.
  • the amount of co-agent or co-agents present in the final water-immiscible dispersion is about 0.1 to about 3 wt% of the total weight of the dispersion.
  • the amount of cellulose present in the final water-immiscible dispersion is generally an amount of about 0.05 to about 5 wt%, and preferably about 0.1 to about 1.5 wt% of the total weight of the dispersion.
  • the polymers may be added to the water-immiscible liquid with the cellulose/surfactant slurry for re-dispersion.
  • the activation of the cellulose/surfactant slurry, plus added polymer, in the water-immiscible liquid is accomplished in the same manner as the dispersion in water-miscible solvent described above.
  • the cellulose/surfactant/polymer composition is activated by mixing in a homogenizer, high shear mixer, or both to attain the desired surface area and viscosity using methods well-known to one skilled in the art. In the instance where the cellulose is produced by high surface area bacteria, activation in a high shear mixer may alone be sufficient.
  • a slurry of hydrophilic insoluble cellulose was prepared by mixing 573.2 g cellulose wet cake fiber (90.0 g cellulose fiber and 483.2 g water) with 180.00 g (6.0 wt%) of the surfactant dodecylamine and 2246.8 g water in a high shear mixer for about 10 minutes at 2,000 rpm. The dispersion was then passed through an APV Homogenizer® (APV Limited, West Wales, U.K.) for 15 minutes at 8,000 psi for two passes. The resulting slurry, containing approximately 3 wt% cellulose, was tray dried at 50 °C and milled to about 1.7 mm (approximately 10 mesh size).
  • the mineral oil modified by the above cellulose/dodecylamine composition showed an appreciable increase in viscosity, both before and after hot-rolling, when compared to base mineral oil alone.
  • the mineral oil sample which was stored over 1% years showed no visible separation of oil and cellulose, while viscosity increased slightly.
  • Table 1 Viscosity of Mineral Oil Rheologically Modified by Cellulose/Dodecylamine Composition
  • Samples of the resulting oil modified by the cellulose/dodecylamine/PVPGH combination were hot rolled in a temperature controlled roller oven for approximately 19 hours at about 300°F (150°C) and about 200 psi (14 kg/cm 2 ) of nitrogen gas.
  • ⁇ cellulose/dodecylamine/PVPGH combination showed an appreciable increase in viscosity, both before and after hot-rolling, when compared to base mineral oil alone.
  • Example 2 1.5 g of the milled cellulose/dodecylamine composition prepared in Example 1, plus 0.5 g of the polymer polyvinyl pyrrolidone tricontene (PVPT) were dispersed in 150 g of mineral oil by high shear mixing in a Waring Blender® (from Dynamics Corp. of America, New Hartford, CN) for 5 minutes. The resulting dispersion contained about 0.25 wt% cellulose, about 0.5 wt% dodecylamine and about 0.5 wt% PVPT.
  • PVPT polymer polyvinyl pyrrolidone tricontene
  • the mineral oil modified by the cellulose/dodecylamine/PVPT combination showed a significant increase in viscosity when compared to base mineral oil alone or to the mineral oil dispersions modified by cellulose/dodecylamine or cellulose/dodecylamine/PVPGH.
  • the viscosities of the mineral oil compositions, both modified and unmodified, are shown in Table 3 below.
  • Example 2 2.25 g of the milled cellulose/dodecylamine composition prepared in Example 1 was then re-dispersed in 300 g of canola oil by high shear mixing in a Waring Blender® (from Dynamics Corp. of America, New Hartford, CN) for 5 minutes to provide a dispersion containing about 0.25 wt% cellulose, about 0.5 wt% dodecylamine.
  • the modified canola oil showed a marked increase in yield stress, as measured by the Bohlin stress rheometer.
  • the modified canola oil revealed a yield stress of 7.067 Pa, as compared to a base canola oil yield stress of 0 Pa.
  • the canola oil modified by the cellulose/dodecylamine composition showed a significant increase in viscosity when compared to base canola oil alone.
  • the viscosities. of the canola oil compositions, both modified and unmodified, are shown in Table 4 below.
  • Table 4 Viscosity of Canola Oil Rheologically Modified by Cellulose/Dodecylamine Composition
  • a slurry of hydrophilic insoluble cellulose was prepared by mixing 32 g cellulose wet cake fiber (5.0 g cellulose fiber and 27.0 g water) with 10.0 g (3.85 wt%) of the surfactant monoglyceride (myvatex 3-50® from Quest International, Hoffman Estates, IL) and 218.0 g water in a high shear mixer for about 10 minutes at 2,000 rpm. - ⁇ -
  • the resulting slurry containing approximately 1.92 wt% cellulose, was tray dried at 50 °C and milled to about 1.7 mm (approximately 10 mesh size).
  • Example 5 2.25 g of the milled cellulose/monoglyceride prepared in Example 5 was re-dispersed in 300 g of canola oil by high shear mixing in Waring Blender® for 5 minutes to provide a dispersion containing 0.25% cellulose and 0.5 wt% monoglyceride .
  • the canola oil modified by the cellulose/monoglyceride composition showed an appreciable increase in viscosity, when compared to base canola oil alone.
  • the viscosities of the canola oil compositions . f both modified and unmodified, are shown in Table 5 below.
  • Example 5 2.25 g of the milled cellulose/monoglyceride composition prepared in Example 5 was re-dispersed in 300 g paraffin oil by high shear mixing in a Waring Blender® (from Dynamics Corp. of America, New Hartford, CN) for 5 minutes to ' provide a dispersion containing about 0.25 wt% cellulose and about 0.5 wt% monoglyceride.
  • Waring Blender® from Dynamics Corp. of America, New Hartford, CN
  • the paraffin oil modified by the cellulose/monoglyceride composition showed an appreciable increase in viscosity.
  • the viscosity of the paraffin oil composition is shown in Table 6 below. Table 6 : Viscosity of Paraffin Oil Rheologically

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Abstract

Cette cellulose hydrophile insoluble agit comme agent de modification rhéologique dans des liquides immiscibles avec l'eau lorsqu'elle est mélangée à des co-agents capables de former des liaisons hydrogène avec des groupes hydroxy à la surface de la fibre cellulosique et qui sont également solubles dans le liquide immiscible avec l'eau. Les co-agents selon l'invention, qui peuvent être des tensioactifs ou des polymères, sont ajoutés au liquide immiscible avec l'eau avant ou pendant le mélange avec la cellulose hydrophile insoluble. Il est possible d'ajouter plusieurs co-agents à la cellulose pendant ou après ajout au liquide immiscible avec l'eau. Le rapport pondéral co-agent/cellulose de cette composition est, d'ordinaire, compris entre ¼ et 30/1.
PCT/US2001/025821 2000-08-25 2001-08-20 Cellulose hydrophile insoluble utilisee comme agent de modification rheologique dans des liquides immiscibles avec l'eau Ceased WO2002018486A2 (fr)

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WO2005060020A3 (fr) * 2003-12-12 2005-10-13 Eveready Battery Inc Cellule electrochimique
EP1762596A1 (fr) * 2005-09-09 2007-03-14 Italfinish S.p.A. Procédé de préparation de revêtements colloïdaux ou gel-coats
US7344593B2 (en) * 2001-03-09 2008-03-18 James Hardie International Finance B.V. Fiber reinforced cement composite materials using chemically treated fibers with improved dispersibility
WO2008079693A1 (fr) * 2006-12-19 2008-07-03 Cp Kelco U.S. Inc. Systèmes tensioactifs cationiques comprenant de la cellulose microfibreuse
WO2010105847A1 (fr) 2009-03-20 2010-09-23 Borregaard Industries Limited, Norge Microfibrilles de cellulose en tant qu'agent de désaération
US7815841B2 (en) 2000-10-04 2010-10-19 James Hardie Technology Limited Fiber cement composite materials using sized cellulose fibers
US7942964B2 (en) 2003-01-09 2011-05-17 James Hardie Technology Limited Fiber cement composite materials using bleached cellulose fibers
US7993570B2 (en) 2002-10-07 2011-08-09 James Hardie Technology Limited Durable medium-density fibre cement composite
US8133352B2 (en) 2000-10-17 2012-03-13 James Hardie Technology Limited Method and apparatus for reducing impurities in cellulose fibers for manufacture of fiber reinforced cement composite materials
US8772359B2 (en) 2006-11-08 2014-07-08 Cp Kelco U.S., Inc. Surfactant thickened systems comprising microfibrous cellulose and methods of making same
WO2014138593A3 (fr) * 2013-03-08 2015-03-05 Solazyme, Inc. Lubrifiants microbiens oléagineux
US9045716B2 (en) 2006-11-08 2015-06-02 Cp Kelco U.S., Inc. Surfactant thickened systems comprising microfibrous cellulose and methods of making same
WO2017067899A1 (fr) 2015-10-19 2017-04-27 Unilever N.V. Composition comprenant une phase huileuse
WO2018114452A1 (fr) 2016-12-23 2018-06-28 Unilever N.V. Composition comprenant une phase huileuse continue structurée
WO2018114450A1 (fr) 2016-12-23 2018-06-28 Unilever N.V. Composition comprenant une phase huileuse continue structurée
WO2018114448A1 (fr) 2016-12-23 2018-06-28 Unilever N.V. Composition comprenant une phase huileuse continue structurée
US10053646B2 (en) 2015-03-24 2018-08-21 Corbion Biotech, Inc. Microalgal compositions and uses thereof
US11337436B2 (en) 2016-12-23 2022-05-24 Conopco Inc. Water-in-oil emulsion
US12426608B2 (en) 2015-10-19 2025-09-30 Conopco, Inc. Composition comprising an oil phase

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CN105164230A (zh) * 2013-03-08 2015-12-16 索拉兹米公司 产油微生物润滑剂
US10053646B2 (en) 2015-03-24 2018-08-21 Corbion Biotech, Inc. Microalgal compositions and uses thereof
WO2017067899A1 (fr) 2015-10-19 2017-04-27 Unilever N.V. Composition comprenant une phase huileuse
US12426608B2 (en) 2015-10-19 2025-09-30 Conopco, Inc. Composition comprising an oil phase
WO2018114452A1 (fr) 2016-12-23 2018-06-28 Unilever N.V. Composition comprenant une phase huileuse continue structurée
WO2018114450A1 (fr) 2016-12-23 2018-06-28 Unilever N.V. Composition comprenant une phase huileuse continue structurée
WO2018114448A1 (fr) 2016-12-23 2018-06-28 Unilever N.V. Composition comprenant une phase huileuse continue structurée
US11337436B2 (en) 2016-12-23 2022-05-24 Conopco Inc. Water-in-oil emulsion

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