Environmentally Friendly Coloration Lead Free Pigment

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Environmentally Friendly Coloration Lead Free Pigment LEAD FREE PIGMENTATION?? Environmentally friendly coloration Lead Free Pigment Public BU Pigments Coatings 19.11.2013 2 Public, Enviromental friendly coloration BU Pigments, Coatings, 19.11.2013 Contents 1. Global Regulations and Concerns on the Use of Lead containing coatings 2. Lead Pigments – toxicity issue 3. Something about Paint 4. Lead free pigmentation – The available option & alternative 13 Public, Enviromental friendly coloration BU Pigments, Coatings, 19.11.2013 17 Public, Enviromental friendly coloration BU Pigments, Coatings, 19.11.2013 European Chemical Agency (ECHA) Classification and Labelling ◼Classification in Annex VI of Regulation (EC) No 1272/2008 C.I Pigment Yellow 34 C.I Pigment Red 104 EC number: 215-693-7 EC number: 235-759-9 CAS number: 1344-37-2 CAS number: 12656-85-8 Index number: 082-009-00-X Index number: 082-010-00-5 Carc. 1B; H350 Carc. 1B; H350 Repr. 1A; H360Df Repr. 1A; H360Df STOT RE 2; H373 STOT RE 2; H373 Aquatic Acute 1; H400 Aquatic Acute 1; H400 Aquatic Chronic 1; H410 Aquatic Chronic 1; H410 Car. Cat. 2; R45 (may cause cancer) Repr. Cat. 1; R61 (may cause harm to the unborn child) Repr. Cat. 3; R62 (possible risk of impaired fertility) very toxic dangerous for R33 (danger of cumulative effects) the environment N: R50-53 (dangerous for the environment: very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment) Lead Pigments – Toxicity Issues Public BU Pigments Coatings 19.11.2013 22 Public, Enviromental friendly coloration BU Pigments, Coatings, 19.11.2013 Lead chrome –Toxicity Issues – Lead(II) chromate is a known carcinogen, developmental toxicant, and reproductive toxicant. It is also suspected that lead(II) chromate is a cardiovascular or blood toxicant, immunotoxicant, kidney toxicant, neurotoxicant, respiratory toxicant, and a skin toxicant or sense organ toxicant. (Source from http://en.wikipedia.org/wiki/Lead(II)_chromate) – Although lead poisoning is one of the oldest known work and environmental hazards, the modern understanding of the small amount of lead necessary to cause harm did not come about until the latter half of the 20th century. No safe threshold for lead exposure has been discovered—that is, there is no known amount of lead that is too small to cause the body harm. 23 Public, Enviromental friendly coloration BU Pigments, Coatings, 19.11.2013 Exposure and contact with Lead – common source of lead exposure for children is lead based paint and the contaminated dust and soil it generates (Clark et al. 1991; Lanphear et al. 1995, 1998; Lanphear and Roghmann 1997; McElvaine et al. 1992; Rabinowitz et al. 1985; Shannon and Graef 1992) – operation of paint mixing, paint spraying (chrome yellow) may be at an average of 1.75 mg/m3 and 3.9 mg/m3 respectively (Elkins, H.B., “The chemistry of Industrial Toxicology” John Willey and Sons, New York and Davis, W.E. & Associates “Emission Study of Industrial Sources of Lead Air Pollutants” Leawood, Kansas 1973) 24 Public, Enviromental friendly coloration BU Pigments, Coatings, 19.11.2013 Some Sources of Lead Exposure 25 Public, Enviromental friendly coloration BU Pigments, Coatings, 19.11.2013 Basic Composition of Paint 26 Public, Enviromental friendly coloration BU Pigments, Coatings, 19.11.2013 Paint Raw Materials – Lead chromate use (intentionally or unintentionally) Types of Paint Pigment Extender * Dryer Air drying primer X X X and topcoat Primer, other bases X X types Top coat, other X bases types *Natural extenders or pigments (like ferro oxides) may contain lead compounds 27 Public, Enviromental friendly coloration BU Pigments, Coatings, 19.11.2013 Typical lead chromate yellow and molybdate orange shades Lemon Middle Molybdate Public: Environmental friendly colorationChrome Chrome Orange 28 Public, Enviromental friendly coloration BU Pigments, Coatings, 19.11.2013 Lead chromate pigments Advantages and Disadvantages Advantages (??) Disadvantages Brilliant & Saturated shades Poor acid and alkali resistance Excellent hiding power Shear sensitive Excellent flow properties Low colour strength Relatively low cost Toxicology 29 Public, Enviromental friendly coloration BU Pigments, Coatings, 19.11.2013 Organic pigments Advantages and Disadvantages Advantages Disadvantages (??) Brilliant & Saturated shades Technical know how Excellent hiding power Excellent flow properties Relatively low cost* No shear sensitive Excellent chemical Resistance Environment Friendly *Depend on the pigment selection *Lead Free Pigmentation – The Way Forward Public BU Pigments Coatings 19.11.2013 31 Public, Enviromental friendly coloration BU Pigments, Coatings, 19.11.2013 Benefits of Organic Pigment *Lead free Pigmentation ✓ Environmentally friendly ✓ Healthy Manufacturing Environment ✓ Safe disposal to the environment ✓ Potential for improved fastness properties ✓ Branding and Social responsible 32 Public, Enviromental friendly coloration BU Pigments, Coatings, 19.11.2013 *Lead Free Pigmentation Possible and Limitation – Key issues (Challenges) : • Opacity : requirement - as close to target as possible i.e.. Try to match the contrast ratio • Shade/Gloss : Requirement – Similar shade, minimum metamerism, similar gloss There are no direct drop-in countertypes to lead chromates but there are many alternatives available which are very suitable. It is normal that each shade will need some minor adjustment • Fastness properties : Light / Weather / Solvent / Overpainting Organic pigments offer similar or better fastness properties to lead chrome • Cost of formulation : generally organic pigment alternatives will be at higher cost but by careful pigment selection and formulation the cost differential can be minimized or overcome. 33 Public, Enviromental friendly coloration BU Pigments, Coatings, 19.11.2013 Lead chrome Pigment alternative Challenge - Opacity – Possibilities : 1. Use of high opacity organic pigments or custom composite pigment 2. Combination with TiO2 (PW 6) 3. Combination with non-toxic inorganic pigments (PY 42, PY 184, PR 101) 4. Light-grey primer to improve opacity (reflectance between 60 – 70%) 34 Public, Enviromental friendly coloration BU Pigments, Coatings, 19.11.2013 Lead chrome Pigment alternative Challenge - Fastness Properties requirements • Fastness to light and weather (Indoor / outdoor application) • Fastness to solvents & alkali • Anticorrosion property* • Fastness to overpainting • Cost (not price !) • Suitability (environmental friendly) – NEW REQUIREMENT!! • There are not single pigment could fit for all the requirement, product selection is critical 35 Public, Enviromental friendly coloration BU Pigments, Coatings, 19.11.2013 Lead chrome Pigment alternative Challenge - Anticorrosive – Chemically active anticorrosive pigments (zinc oxide, zinc phosphate, calcium phosphate and their modification) – Electrochemically active anticorrosive pigments (Zinc and calcium phosphates and their modifications) – Active, cathodic protective anticorrosion pigment (Zinc dust) – Passive anticorrosive pigments (Micaceous iron oxide, aluminium silicates) High Opacity Organic Pigments – 70 Series Public BU Pigments Coatings 19.11.2013 37 Public, Enviromental friendly coloration BU Pigments, Coatings, 19.11.2013 1. High Opacity Organic Pigments Absorption / Reflectance of Light ◼ Organic Yellows and Reds have low absorption, high reflectance ◼ Determined by laws of physics Scattering of Light ◼ Depends on refractive index difference to binder (= constant for a given paint system) ◼ Depends on particle size of the pigment ➔Find the particle size of organic pigments at which maximum scattering occurs 38 Public, Enviromental friendly coloration BU Pigments, Coatings, 19.11.2013 1. High Opacity Organic Pigments Light Scattering depends on Particle Size Scattering ability particle size with maximum scattering power Particle size 39 Public, Enviromental friendly coloration BU Pigments, Coatings, 19.11.2013 1. High Opacity Organic Pigments The "70"-series of pigments Regular PY 83 Opaque PY 83 40 Public, Enviromental friendly coloration BU Pigments, Coatings, 19.11.2013 1. High Opacity Organic Pigments The "70"-series of pigments – General features compared to standard grades : - Larger particle size / smaller surface area - Higher opacity - Easier to disperse - Better rheology - Increased pigment loading possible - Improved fastness 41 Public, Enviromental friendly coloration BU Pigments, Coatings, 19.11.2013 1. High Opacity Organic Pigments Clariant pigments with optimized particle size Hostaperm Yellow H4G/H4G 70 Hostaperm Red D3G 70 / D2G 70 Novoperm Yellow 5GD 71 Hostaperm Red E2B 70 Novoperm Yellow F2G Novoperm Red HF3S 70 Novoperm Yellow M2R 70 Novoperm Red F2RK 70 Novoperm Yellow HR 70 Novoperm Red F3RK 70 Hansa Brill. Yellow 2GX 70 Permanent Red FGR 70 Novoperm Orange HL 70 Permanent Orange RL 70 We herewith confirm that substances restricted by directive 2002/95/EC, RoHS (Heavy metals (Cd, Pd, CrVI, Hg), PBB, PBDE) are not intentionally added to all above mentioned products. Public: Environmental friendly coloration 42 Public, Enviromental friendly coloration BU Pigments, Coatings, 19.11.2013 1. High Opacity Organic Pigments * Noted lead chrome pigment is in 20% pigment loading, meanwhile organic pigment is only 10% pigment loading Relative Opacity - Lead containing and lead free options Lead Free Pigment Opacity 100100 93.9 91.8 9090 87.56 83.7 82.73 80.81 8080 74.1 75.93 69.75 72.18 7070 66.37 6060 50 50 40 40 Contrast Ratio Contrast Contrast Ratio Contrast 30 P.O.34 P.O.74 P.O.36 30 P.R254 P.Y.74
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