WO2007002030A2 - Pigments produisant peu de poussiere - Google Patents

Pigments produisant peu de poussiere Download PDF

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Publication number
WO2007002030A2
WO2007002030A2 PCT/US2006/023898 US2006023898W WO2007002030A2 WO 2007002030 A2 WO2007002030 A2 WO 2007002030A2 US 2006023898 W US2006023898 W US 2006023898W WO 2007002030 A2 WO2007002030 A2 WO 2007002030A2
Authority
WO
WIPO (PCT)
Prior art keywords
powder
liquid
solid
composition
pigment
Prior art date
Application number
PCT/US2006/023898
Other languages
English (en)
Other versions
WO2007002030A3 (fr
Inventor
David Schlossman
Yun Shao
Frank Mazella
Carl Orr
Original Assignee
Kobo Products, Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kobo Products, Inc. filed Critical Kobo Products, Inc.
Publication of WO2007002030A2 publication Critical patent/WO2007002030A2/fr
Publication of WO2007002030A3 publication Critical patent/WO2007002030A3/fr

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00—Cosmetics or similar toiletry preparations
    • A61K8/02—Cosmetics or similar toiletry preparations characterised by special physical form
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
    • A61Q1/00—Make-up preparations; Body powders; Preparations for removing make-up
    • A61Q1/02—Preparations containing skin colorants, e.g. pigments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y5/00—Nanobiotechnology or nanomedicine, e.g. protein engineering or drug delivery
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK  ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
    • C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
    • C09C1/44—Carbon
    • C09C1/48—Carbon black
    • C09C1/56—Treatment of carbon black ; Purification
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK  ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
    • C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
    • C09C3/08—Treatment with low-molecular-weight non-polymer organic compounds
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK  ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
    • C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
    • C09C3/10—Treatment with macromolecular organic compounds
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK  ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
    • C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
    • C09C3/12—Treatment with organosilicon compounds
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K2800/00—Properties of cosmetic compositions or active ingredients thereof or formulation aids used therein and process related aspects
    • A61K2800/40—Chemical, physico-chemical or functional or structural properties of particular ingredients
    • A61K2800/41—Particular ingredients further characterized by their size
    • A61K2800/413—Nanosized, i.e. having sizes below 100 nm
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/60—Particles characterised by their size
    • C01P2004/62—Submicrometer sized, i.e. from 0.1-1 micrometer
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/60—Particles characterised by their size
    • C01P2004/64—Nanometer sized, i.e. from 1-100 nanometer

Definitions

  • the present invention relates to cosmetic manufacturing processes incorporating micronized pigments highly subject to entrainment in the air, particularly low dust pigments useful in the preparation of dispersions for use in cosmetics compositions.
  • Powders of various ultrafine particle sizes have, in the cosmetics industry uses in numerous applications. Powder materials such as pigments, fillers and the like are often useful in fine and ultrafine particle sizes, which may be measured in microns or nanometers for the particular properties they may bring to cosmetic emulsions, dispersions and other products.
  • some materials may be problematic in cosmetic applications if, during manufacturing, for example, they are handled in such a way as to result in some of the material becoming airborne. More specifically, powder materials that contain dust particles that can become airborne during processing, end use or other handling, and may be harmful to personnel and others who come into contact with the airborne particulates and who may inhale or otherwise ingest the dust.
  • D&C Black No. 2 carbon black
  • This material was recently approved for cosmetic use by the FDA and prior to the present application. See the Federal Register of July 28, 2004 (69 FR 44927) and October 8, 2004 (69 FR 60307).
  • D&C Black No. 2 is usually supplied as a fluffy, fine-particle product which can easily become airborne and may pose a health hazard to a technician, equipment operator or other individual handling it.
  • OIHHA California Office of Environmental Health and Hazard Assessment
  • the International Agency for Research on Cancer (“IARC") has stated that the respirable fraction is "that fraction of an aerosol with an aerodynamic diameter suitable for penetration into the alveoli/gas exchange region of the lung (typically ⁇ 10 ⁇ m)" (pp. 171- 172, Volume 65, IARC Monographs on the Evaluation of Carcinogenic Risks to Human, 1996).
  • this reference is, apparently, to liquid materials as opposed to solid particles.
  • carbon black pigment powder has desirable properties and is appealing to cosmetic chemists and others. Accordingly, as has been discovered in connection with the present invention, there is an unrecognized need to address the problem of dusting. Similar problems and needs may arise with other powders.
  • the invention provides a non-dusting powder product, with a mean size in the range of about 0.01 mm (10 ⁇ m) to about 10 mm optionally in the range of 1 - 5 mm.
  • the powder is a pigment such as a black pigment and comprises loosely bound agglomerations of, for example, microf ⁇ ne particles.
  • the inventive agglomerated pigment is, even under the gentlest forces present in normal cosmetic manufacturing processes, easily dispersed into the other applicable ingredients in a manner substantially as effective as conventional pigment.
  • Useful pigments include, for example, carbon black powder such as D&C Black No. 2.
  • the powder treatment product desirably is particulate and may take the form of flakes, prills, beads or granules that are aesthetic, free flowing and have desirable properties for being manually or automatically handled.
  • the powder is treated to be free of, or have a low dust content.
  • the dust control treatment may be a treatment as described herein or equivalent or comparable treatment such as will be apparent to one of skill in the art in light of this disclosure.
  • the product is readily dispersible in liquids, e.g. aqueous media, lipophilic or silicone oils, or emulsions or in powder products after comminution to a desired particle size.
  • Such dispersibility can be obtained by providing the product adequate softness to be easily ground or milled to have a desired particle size characteristics, as for example are employed in the cosmetics industry.
  • a desirable softness can generally be obtained with a content of water, of solvent or of binder in the powder product of from about 5 to about 60 percent by weight.
  • the invention provides a method of treatment of commercially available dust-containing carbon black pigment, for example, UNIPURE BLACK LC902 from LCW Inc., to reduce or eliminate potentially harmful dust or with a view to providing an innocuous, aesthetic product.
  • commercially available dust-containing carbon black pigment for example, UNIPURE BLACK LC902 from LCW Inc.
  • One embodiment of the treatment method comprises the addition of a suitable proportion of a hydrophilic solvent to the carbon black pigment powder, or other dust- containing powder to render it non-dusting.
  • a proportion of from about 10 to about 90 percent by weight of hydrophilic solvent, based on the weight of the resultant composition is employed.
  • the proportion can be from about 30 to about 70 percent hydrophilic solvent, the balance being carbon black pigment powder.
  • Other ingredients may be added to this composition as described herein or as will be apparent to those skilled in the art. Pursuant to a further embodiment of the invention, approximately equal weight of solvent to pigment can be employed.
  • a suitable hydrophilic organic solvent, or mixture of solvents can be selected from the group consisting of alkyl alcohols including methyl, ethyl, isopropanol, and other lower alkyl alcohols having not more than about 10 carbon atoms, polyhydric alcohols including butylene glycol, glycerol and lower alkyl dihydric or trihydric alcohols having not more than about 12 carbon atoms, and aqueous solutions of the foregoing hydrophilic organic solvents.
  • Such aqueous solutions can employ any suitable concentration of alcohol in water, for example a concentration from about 10% to about 100%, (i.e. anhydrous alcohol). In a useful embodiment, the concentration of alcohol is from about 10 to about 30 % by weight.
  • Employing a polyhydric alcohol can be advantageous in reducing or controlling possible bacterial contamination of the pigment product.
  • a water soluble or dispersible natural or synthetic dispersant for example polysorbate 20 or ammonium polyacrylate, can also be added in a proportion helpful in providing adequate dust and better dispersibility, for example a proportion of from about 0.01 to about 10 percent, optionally from about 0.5 to about 5 percent by weight of the resultant composition.
  • suitable dispersants will be apparent to those skilled in the art in light of the disclosure herein.
  • the low-dust carbon black particulate product of the invention can be dried to remove solvent and/or water and provide the product with a desired hardness in a range providing good dust-free handling characteristics and permitting ready reduction to a quality powder for dispersion in cosmetics or other target end product formulations.
  • the invention includes cosmetics or other product formulation processes which comprise such reduction to powder and the cosmetics or other products of the formulation processes.
  • one or more of various binder materials can be employed to convert the noxious carbon black powder to an aesthetic non- dusting or low dust particulate product.
  • Comparable amounts of hydrophobic or amphoteric liquid, solid or semi-solid binder can be used in similar processes to provide alternative flake, grill or granular products which ay be more or less useful in various end products according to the compatibility of the binder with the end product.
  • Suitable binders can comprise one or more materials selected from the following groups: a) waxes including natural waxes, metal soaps, synthetic waxes, and petroleum waxes; b) wax-like polymers including polyethylene glycols and pololefin and other hydrocarbons resins; c) cosmetic liquids including natural and synthetic oils, esters, hydrocarbons and silicone fluids; and d) polymers or oligomers of hydroxy fatty acid acids, e.g. polyhdroxystearic acid or glyceryl-6 polyricinoleate.
  • waxes including natural waxes, metal soaps, synthetic waxes, and petroleum waxes
  • wax-like polymers including polyethylene glycols and pololefin and other hydrocarbons resins
  • cosmetic liquids including natural and synthetic oils, esters, hydrocarbons and silicone fluids
  • polymers or oligomers of hydroxy fatty acid acids e.g. polyhdroxystearic acid or glyceryl-6 poly
  • the solid binder is not easily comminuted with agitation or blending elevated temperature can be employed to soften the binder.
  • a further alternative is to employ a liquid, solid or semisolid surfactants to convert the carbon black powder, e.g. D&C Black # 2 to render it non-dusting.
  • Suitable surfactants can comprise one or more materials selected from the group consisting of anionic and non- ionic surfactants.
  • suitable surfactants which may be used alone or in combination include silicone polyether, alkanoamide and ethoxylated alcohol. Many others are known and can be employed.
  • the surfactant material can be employed in a manner similar to that described for the hydrophilic solvent or binder with the difference that relatively smaller proportion can be adequate, for example from about 0.1 to about 10 percent by weight of the carbon black product.
  • drying will usually not be appropriate, but heating may be employed to soften the binder or lower its viscosity, if desired. If a somewhat volatile liquid, for example a silicone is employed, drying to a suitable hardness may be employed, if desired, as described above.
  • the invention also includes embodiments of particulate-low dusts product as described herein which consist of or consist essentially of the specific ingredients described.
  • the invention permits a suit able low-dust or non-dusting particulate carbon product to be selected for a particular purpose.
  • products made from hydrophilic solvents can be employed in aqueous-base cosmetics or in the aqueous phase of an emulsion or dispersion cosmetic.
  • low-dust or non-dusting particulate carbon products prepared from waxes, lipophilic oils or silicone fluids can beneficially be employed in cosmetic formulations or phases having a wax, lipophilic oil or silicone fluid base respectively.
  • the proportion can be sufficient to introduce into the cosmetic formulation or cosmetic phase the amount of carbon powder, as embodied in the inventive low-dust particulate product, that would conventionally be used, for example from about 0.1 to about 20 percent by weight of the cosmetic formulation or phase.
  • the invention includes embodiments wherein the amount is from about 0.5 to about 10 percent by weight of the formulation or phase. If desired, a proportion of one or more other cosmetic ingredients in the formulation can be reduced to compensate for the presence of the solvent or binder in the novel particulate carbon product of the invention.
  • any desired proportion of another pigment powder or powers may be added to the carbon black powder, for example from about 10 to about 90 percent by weight of the resultant composition.
  • the proportion of polyhydric alcohol employed can then be based upon the weight of the resultant composition.
  • the added pigments are selected to provide, in combination with the carbon black pigment, a desired end product color. For example, various combinations of blue, green and white pigments may be added for a blue-black eye shadow. Other selections of pigments for desired color effects will be apparent to those skilled in the art.
  • the invention includes embodiments wherein such other pigments are also treated or processed by the methods of the invention, along with the carbon black powder pigment, whereby undesired dust contained such other pigments can also be controlled.
  • a wide range of other pigments or powder materials may be employed additively with the carbon black powder being admixed therewith either before or after a dust-control treatment pursuant to the invention.
  • Such other pigments include inorganic pigments and organic pigments, pigment extenders and fillers, including talc, mica and barium sulfate and other insoluble powder materials employed in the cosmetics arts.
  • Some suitable inorganic pigments which may be employed include: titanium dioxide; zinc oxide; iron oxide; alumina oxide; chromium oxide; mango violet; ultramarines, composites of metal oxides or of a metal oxide and an inorganic salt and any other inorganic pigment powder useful in the cosmetic or other relevant arts.
  • powders such as titanium dioxide, zinc oxide and other inorganic pigments or fillers, may be treated with silica, alumina, boron nitride or other known inorganic coatings, singly or in combinations.
  • suitable organic pigments include aluminum, barium, calcium an zirconium lakes of FD&C and D&C grades of Red No. 6, Red No. 7, Red No. 21, Red No. 27 and Yellow No. 5.
  • suitable inorganic or organic pigments will be known or be or become apparent to those skilled in the art.
  • the flake, prill or granular particulate pigment product of the invention can be air-blasted or winnowed to remove residual fine dust, should such be present.
  • the separation can play an air velocity sufficient to effect separation yet low enough to avoid undesired displacement of the desired beads or prills.
  • a gas other than air could used if desired.
  • Such air-driven separation methods are difficult to perform on the dust-containing commercial product whose small particle size renders the desired primary particles prone to air-entrainment and undesired dispersal in even very light or air currents.
  • non-carbon black powders described or suggested herein suffer from dusting problems, they can be treated by the methods of the invention in the same way as has been described for carbon black, subject to any modifications that one skilled in the art may be treated alone or in admixture with carbon black and the resultant non-dusting, or low dust comminutable product may be employed alone or together with the carbon black product of the invention. It will be understood that the invention can be applied to a wide range of other dust-bearing powders, including pigments, fillers and the like regardless of color.
  • novel low-dust or non-dusting carbon black product of the invention preferably prepared from D&C Black No. 2, can be employed in a desired cosmetic or other formulation including a formulation selected from the group consisting of eyeliner, brush-on-brow, eye shadow, mascara, lipstick, blushers and rouge, makeup and foundation, and nail enamel.
  • the invention is of particular advantage when employed with eye cosmetics including eyeliner, brush-on-brow, eye shadow, and mascara as these products may conventionally contain relatively high proportions of black pigment, for example from about 2% to about 10% weight of the formulation. Pursuant to the present invention this pigment can be provided by employing a similar proportion by weight of the inventive low-dust particulate carbon product.
  • eye cosmetics include, without limitation, eyeliner pencils: hydrogenated palm glycerides, hydrogenated palm kernal glycerides, hydrogenated cottonseed oil, synthetic japan wax, myristyl lactate, carnauba, isopropyl myristate, quaternium 18 bentonite, silica, methylparaben, propylparaben, butylparaben, BHT, BHA, citric acid, D&C Black No.
  • iron oxides ultramarine blue and titanium dioxide
  • wet and dry eyeliner talc, mica, lauroyl lysine, zinc stearate, bismuth oxychloride, isopropyl isostearate, dismethicone copolyo, stearic acid , triethanolamine, propylparaben, butylparaben, methylparaben, titanium dioxide, brown iron oxide, yellow iron oxide, D&C Black No.
  • the invention also has particular application in other fields where carbon black powder is a desirable product, but carbon dust formation may be problematic or hazardous to personnel and it is desirable to employ a product which voids these problems.
  • the particulate carbon products of the invention replace carbon powder in foodstuffs, over-the-counter pharmaceutical products, medicaments, ethical pharmaceutical products, health aids, nutritional supplements and rubber products including tires, hoses and the like.
  • the invention enables aesthetic non-dusting or low-dust products to be provided that are safe and convenient to handle and do not generate unaesthetic or potentially hazardous airborne particles under normal handling and processing conditions employed in the cosmetics or other relevant industry.
  • the inventive low-dust powder products can readily be comminuted to a desired size under conditions normal to, or easily accepted by, the respective industry.
  • the solvent, binder or other dust-control additive can be a cosmetically compatible material, such as those described herein, which is useful or acceptable in the end product application.

Abstract

L'invention concerne une gamme de produits à base de poudres produisant peu ou pas de poussière, utilisés en cosmétique et pour d'autres applications, afin d'éviter les risques liés à leur libération lors de la manipulation. Ces produits peuvent être obtenus en utilisant des liants ou des solvants hydrophiles en quantités adaptées.
PCT/US2006/023898 2005-06-20 2006-06-20 Pigments produisant peu de poussiere WO2007002030A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US69212705P 2005-06-20 2005-06-20
US60/692,127 2005-06-20

Publications (2)

Publication Number Publication Date
WO2007002030A2 true WO2007002030A2 (fr) 2007-01-04
WO2007002030A3 WO2007002030A3 (fr) 2007-10-11

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Application Number Title Priority Date Filing Date
PCT/US2006/023898 WO2007002030A2 (fr) 2005-06-20 2006-06-20 Pigments produisant peu de poussiere

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Country Link
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010085689A1 (fr) * 2009-01-23 2010-07-29 Kobo Products, Inc. Dispersion de noir de carbone antimicrobienne perfectionnée
EP3549985A1 (fr) 2018-04-03 2019-10-09 M/S Koel Colours Pvt. Ltd. Pigment anti-poussière et facilement dispersible

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4194921A (en) * 1977-06-24 1980-03-25 Ciba-Geigy Corporation Pigment compositions and process for dust free pigment beads
WO2004050771A1 (fr) * 2002-12-04 2004-06-17 Ciba Specialty Chemicals Holding Inc. Compositions de pigments exemptes de poussiere obtenues par sechage par pulverisation
US20050042189A1 (en) * 2001-10-31 2005-02-24 Paolo Balliello Method of producing low-dust pigment compositions

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4194921A (en) * 1977-06-24 1980-03-25 Ciba-Geigy Corporation Pigment compositions and process for dust free pigment beads
US20050042189A1 (en) * 2001-10-31 2005-02-24 Paolo Balliello Method of producing low-dust pigment compositions
WO2004050771A1 (fr) * 2002-12-04 2004-06-17 Ciba Specialty Chemicals Holding Inc. Compositions de pigments exemptes de poussiere obtenues par sechage par pulverisation

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010085689A1 (fr) * 2009-01-23 2010-07-29 Kobo Products, Inc. Dispersion de noir de carbone antimicrobienne perfectionnée
EP3549985A1 (fr) 2018-04-03 2019-10-09 M/S Koel Colours Pvt. Ltd. Pigment anti-poussière et facilement dispersible
WO2019193597A1 (fr) 2018-04-03 2019-10-10 M/S Koel Colours Pvt. Ltd. Pigment anti-poussière et facilement dispersible
US10934437B2 (en) 2018-04-03 2021-03-02 M/S Koel Colours Pvt. Ltd. Anti-dust and easily dispersible pigment

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