Pigment Surface Treatments - sunjinbs.com

1 Pigment Surface TreatmentsKobo Products, Plainfield, NJ 07080, USA1. Common Surface Treatments and their properties2. Hybrid treatment3. Hydrophilic treatment4. ConclusionsOutline Modifies Pigment Surface to hydrophobic and/or lipophilic Improve the skin feel Improve the chemical stability of metal oxides Improves Pigment wetting and size reduction during dispersion process Improved dispersion stability and formula stability1. Surface TreatmentPigmentOHOHOHOHHOHOHOHOHOC ommon and Popular Surface Treatmentfor Color CosmeticsSi O SiO SiCH3H3 CCH3CH3CH3 HCH3CH3 OOHHOOHOSiOCH3Si(CH3)3Si OCH3OH(H3C)3 SiOOOSiOCH3Si(CH3)3 SiOCH3O(H3C)3 SiOHOHO- H2 More heat- H2 Pigmentn- H2 PigmentHeatPigmentCH3 Properties: Very Hydrophobic Chemically bonded and stable at pH of 3 - 9 Very popular in silicone based formulas.

2 Not easy for o/w or w/o formula Hydrogen potential -processing hazard Methicone Code MSSiOSiOSiOOCH3CH3CH3CH3CH3CH3 OOHHHHOOSiSiH3CH3 CCH3CH3 OSiOCH3CH3nPigmentn- H2 OPigmentProperties: Easy to disperse in cyclomethicone Have good slip and a more lubricious feel than methicone No Hydrogen potential Hydrophobicity can be low when the reactive sites are Code DSOHOTiOCC17H35 OCH3 CHCH3 OTiC17H35 OCOOCOC17H35 OCOC17H35pigment Surface ---hydrophlicpigment Surface ---hydrophobic lipophilic3- (CH3)2 CHOHO rgano TitanateIsopropyl Titanium TriisostearateProperties.

3 Lipophilic and easy to disperse in oil, ester, hydrocarbon and silicone Easy to grind so color can be consistent Have excellent affinity to the skin Suitable for cream-to-powder formula and pressed powder Not stable to acid Code ITTKobo patent on ITT treated pigments and powders : # 4877604 Dispersion of 40% TiO2 ITT treatedUntreatedOrgano Titanate (II) Metal Soap -- Magnesium MyristateProperties: Creamy feel: Increased adhesion to skin and wear Better pressability. Suitable for powders Hydrophobic / LipophilicSoluble salt of Fatty Acid+ Metal salt Fatty Acid+ Metal hydroxideMetal soapPigmentDepositionCode MMTriethoxycaprylylsilaneHOSiCnH2n+1 OHOHC2H5 OSiCnH2n+1OC2H5OC2H5 OHHOHOHOHOH- H2 OSiOCnH2n+1 OHydrophobicSi- 3 C2H5 OHCnH2n+1 OpigmentOOpigmentxHOSiCnH2n+1 OHOHP roperties.

4 Excellent hydrophobicity Zero Hydrogen Potential, no Si-H bonds More compatible with ester and oil Stable at pH = 3(code 11S2)Fluorinated compoundsMOMOPOCnF2n+1CH2CH2 OOHHP igment SurfaceProperties: Hydrophobic Lipophobic Good for long wear Hard to wet and grind; color consistency can be an issueNatural lookWith PF t reated pigments ,ligh t is scatteredWith conventional (lipophilic) pigments , light is reflectedSkin OilLipophilic PigmentSkin SurfaceSkin OilPF Treated PigmentSkin SurfaceC9-15 Perfluoroalcohol Phosphates ( code PF)Lecithin Non-hydrogenated : code CLHydrogenated : code PCProperties.

5 Nature ingredient Highly moisturizing Very creamy texture and good for powder Hydrogenated lecithin provide fair hydrophobicity, but is much less odorous and more heat coatingPolyether Alkoxysilane TreatmentOC2H5Si PEG-8OC2H5C2H5 OOHOHOHOHOO O OSi O SiPEG-8 PEG-8x+Hydrophilic treatment - StructurePEG-8 Methyl Ether Triethoxysilane -Code SWPEG-8 Triethoxysilane treatment in H2 Onon-treatedtreatednon-treatedtreatednon -treatedtreatedImmediately after mixingAfter 30 secondsAfter 10 minutesMixed 2 grs of TiO2 CR-837 in 50 ml H2 OViscosity of metal oxide pigments premixes at 65% Oxide Black C33-5198 TiO2CR-837200.

6 000300,000400,0000 Untreated1% silanecPs100,0002% silane48,400 cPs18,500 cPs100,000150,000200,0000 Untreated1% silane50,0002% silane4,500 cPs4,600 cPscPsPEG-8 Triethoxysilane treatment in H2O15 nm Hydrophilic TiO2 Non treatedTreatedViscosity of premix at 42% solids500,0001,000,0000 Untreated5% treatmentcPs250,000750,0002,800850,000 PEG-8 Triethoxysilane treatment in H2 ONew Hybrid Treatment1. Modify Surface energy* US Provisional patent application No. 60/472,527 AlkoxysilaneMethiconeDimethiconeCrosslin ked coating on Pigment {Design of Superdispersible Surface TreatmentIsopropyl titanium triisostearate(ITT)+ Captures advantages of both coatings in one single treatment .}

7 A broader range of materials can be coated. Allow better color retention for pigments and particle size Soap / ITTTTS CrosspolymerTTS coated Pigment floats almost indefinitely at pH 2 Stability of TTS treatment Toward daysITTM agnesium Myristate1020030 Cont rolNeutralWashingWashingat pH 240 Hydrophobicity by Floating Test73% in Cyclopentasiloxane75% in Mineral OilViscosity of Iron Oxide DispersionscPs500,0001,000,0001,500,0000 Untrea te dI T TSilaneITT/TCSC ross polymerToo thickto measure500,0001,000,0001,500.

8 0000 Untrea te dI T TSilaneITT/TCSC ross polymercPsToo thickto measureITT/TCS (TTS) Crosspolymer treatment * Dispersant: %of polyhydroxystearic acidViscosity of 75% Rutile TiO2 DispersionsOut of scale100,000200,0000 UntreatedMSITTITT/TCSC rosspolymercPs50,000150,000 SilaneTTS Crosspolymer in C12-15 Alkyl BenzoateViscosity of 75% Anatase TiO2 DispersionsTTM & TTDM Crosspolymer Treatments * w/ of PEG/PPG-20/15 dimethicone ** w/ of polyhydroxystearic acidIsododecane*cyclomethicone*C12-15 AlkylBenzoate**cPs0100,000200,000300,000 400,000 ITTMSTPDMTTM TTDM800,000ent2.

9 PF + Silane = FOTS Hybrid -- Improved compatibility PF treatmentHYBRIDTREATMENTSila netreatmentF3C CF2 CH2 CH2 P OH()nmO3- mPFFOTS - Improved dispersibility- Retained lipohobicity- Popular in Japan Silane entP F treatm en tHYBRIDTREATMENTF3 CCF2CH2CH2 POH()nmO3-mITTFITT- More lipophlic and easy to formulateIsopropyl titanium triisostearate3. PF + ITT = FITT Hybrid -- Improved compatibility NT: No treatmentMS: MethiconeNNS: Methoxy Amodimethicone/Silsesquioxane Copolymer(And) Triethoxy Caprylylsilane(WO 03/043567 A3, May 30, 2003)4.

10 treatment of Organic LakesFD&C Blue 1 Aluminum LakeNTMSNSSFD&C Red 40 Aluminum LakeNTMSNSS2% in water, Standing over 4 40 Al LakeBlue 1 Al Lake< .1 % of 2% aqueous suspensions by spectrophotometryNon-treated : after 1 day @ room temperatureNSS-treated : after 30 days @ room temperatureNSS-treated : after 30 days @ 50 CTreatment of Organic LakesFD&C Red 40 Aluminum LakepH2pH3pH11pH12mineral acidorganic acidorganic base mineral baseEffect of pH on the stability in water (2% lake in water; 1 day test) Effect of pH on the stability in waterFD&C Blue 1 Aluminum LakeMethiconeNSStreatmenttreatmentEffect of surfactants on the stability in Water(2% lake in 2% SDS aqueous solution; 7 days test)Conclusions The use of hybrid or composite materials to treat pigments can enhance their chemical stability and wetting by multimedia.