Hair Shampoo Laundry Detergent “Cleaning Your Hair vs Cleaning Your Clothes” Jeff Easley – Sr. Global Performance Improvement Specialist Stepan Company Midwest SCC Meeting March 11, 2014 Objectives… Compare and Contrast: • Cleaning technology • Ingredient types • Ingredient functions • Formulations • Performance testing • Regulatory environment Cleaning Technology Cleaning Hair vs Cleaning Fabric In General… • Different substrates • Many more fabric types than hair types • Soils to be removed differ • Surfactant interfacial phenomena similar • Differences in washing processes Detersive Systems System Soil Household Laundry Mixed & Variable Hair Shampoo Oily Mechanical Action Moderate Vigorous • Rubbing in • Rinse cycle Detergent Unbuilt or Built Surfactant Organic Surfactant Progression of Laundry Detergent Forms Bars Liquids Powders Also known as: Heavy Duty Powders (HDP) Heavy Duty Liquids (HDL) Product Trends • Increasing Concentration – 2X, 4X and greater • Cold Water Cleaning • Eco-friendly Products – Using “Green” or natural based Ingredients • Recyclable Packaging • High Efficiency – Low foaming variants Comparison of Claims • • • • • • • • • • • Hair Shampoo Rapid-Drying Fragrance Free Dermotologist Recommended Volumizing Clarifying Hypoallergenic pH Balanced No Animal Testing Mild Moisturizing Free From… • • • • • • • • • • • Laundry Detergent Botanical/Herbal Kosher No Additives/Preservatives Fragrance Free Hypoallergenic Economy Convenient Packaging All Natural Product Ease of Use pH Neutral Dermatologically Tested Interesting Laundry Fact… Ingredient Types Ingredient Comparison…. Hair Shampoo Key • Surfactants • Water • pH adjusters • Fragrance • Dye • Preservative • Vitamins • Protein derivatives • Inorganic salts • Humectants • Emollients • Silicones • Thickening agents • Chelants/Sequestrants • Suncreen agents Laundry Detergent • Surfactants • Builders • Buffering Agents • Enzymes • Optical Brightener • Polymers • Hydrotropes • Enzyme Stabilizer • Preservative • Colorant • Fragrance • Softening Agent • Bleach • Anti-redepostion Agent • Filler • Water Typical Physical Properties pH Hair Shampoo Slightly acidic (5.5 – 6.5) Household Alkaline Laundry (8.0-10.5) Detergent (Liquid) Viscosity % Actives 3,500– 10-12% 7,000 cps (mid-tier) at 25C 300 – 700 5-30% cps at 25C (bargain to premium) Soils Types and Ingredients to Address Them Anionic & Nonionic Surfactants Anionic Surfactant Nonionic Surfactant, Solvents Enzymes Surfactants, Bleaching Agents Water-soluble Particulate Fats/oils Proteins/ carbohydrates Oxidizable Inorganic salts Sugar Urea Perspiration Metal oxides Clays Humus Carbon Vegetable oil Animal fat Human sebum Mineral oil Waxes Blood Egg Milk Grass Starches Fruits Vegetables Wine Coffee Tea Surfactant Comparison Hair Shampoo • Sulfonates Laundry Detergent • Sulfonates – Alpha Olefin Sulfonate – Acids – Neutralized forms • Sulfates – Alkyl ether sulfates – Alkyl sulfates • • • • • Alkanolamides Amphoterics Methyl Esters Sulfoacetates Sulfosuccinates • Sulfates – Alkyl ether sulfates – Alkyl sulfates • • • • Alkoxylates Alkanolamides Methyl esters Hydrotropes Common Primary Anionic Surfactant • Linear Alkylbenzene Sulfonic Acid (LABSA) – – – – – Good foamer Good detergency Neutralization necessary Best carbon chain C11-12 linear Corrosive in acidic state Common Primary Anionic Surfactant • Alkyl Ether Sulfates (AES) C12-15(O-CH2-CH2)nOSO3- Na+ – – – – – n = 2 or 3 Foam enhancer Good hard water tolerance Carbon chain C12-14 with 2-3 moles EO Preferred Due to gel phase formation, add other ingredients first Stable at 4<pH<10 Other Primary Anionic Surfactant • Alpha Olefin Sulfonate CH3(CH2)m CH3(CH2)m CH CH (CH2)nSO3- Na+ + (CH2)nSO3- Na+ OH Where m = 8 – 14; n = 1-3; and m + n = 9-15 – – – – Good foaming Good detergency Stable over a broad pH range Synergism with LAS Common Primary Nonionic Surfactant • Alcohol Ethoxylates C12-15(O-CH2-CH2)nOH – – – – – Mid to high HLB preferred Good grease cleaner Low foam generation Stable in alkaline solutions Compatible with anionics/cationics n = 7-9 Common Secondary Surfactant CH3 • Amine Oxides (AO) N CH3(CH 2)11 • Alcohol Ethoxylates (low HLB) CH3 OH H CH3 N CH3(CH 2)11 C11-15(O-CH2-CH2)nOH n = 2-4 O OH C11-17 N • Alkanolamides OH O • Soap (defoamer) C11-17 O- Na+ O CH3 Ingredient Functions Surfactant Attributes for Laundry Detergents Role of Surfactants The Ideal Surfactant Other Considerations • Hydration of fabrics and soils • Solubilization of greases/oils • Suspension of hydrophobic soils • Generation of suds Surfactant Attributes for Laundry Detergents Role of Surfactants The Ideal Surfactant Other Considerations • Low CMC • Low Krafft temperature • High solubility in hard/cold water • Lowest air/water surface tension • Low oil interfacial tension • Fast kinetics Surfactant Attributes for Laundry Detergents Role of Surfactants The Ideal Surfactant Other Considerations • Low cost to performance ratio • Excellent environmental profile • Excellent human safety profile Surfactant Function in HDL Formulas • Primary Surfactants Provide: – Good foaming – Good detergency (removing soils from clothes) – Emulsification and solubilization of soils or dirt Surfactants Function in HDL Formulas • Secondary Surfactants Provide: – Foam enhancement – Cleaning enhancement – High viscosity formulas – Solubilization of other ingredients Functions of Some Commonly Used Laundry Additives • • • • • • • • Builders Antiredeposition Agents Dye transfer inhibitors Soil release polymers Optical brighteners Enzymes Control additives for pH, viscosity, foam Preservatives, Perfume, Dye Formulation Comparison Formulation Ingredients HDLs Primary Surfactants (5-40%) Hydrotropes (0-5%) Secondary Surfactant (0.5-3%) Enzyme Stabilizer (0-5%) Buffering Agents (1-8%) Preservative (0-0.05%) Builders (1-7%) Colorant (0-0.1%) Enzymes (0-1.5%) Fragrance (0-1%) Optical Brightener (0.02-2%) Softening Agent (0-7%) Polymers (0-1%) Formulation Ingredients HDPs Primary Surfactants (5-15%) Polymers (0-1%) Builders (10-30%) Anti-caking Agent Bleach (0-5%) Filler (30-60%) Anti-redeposition Agent (0-1.5%) Colorant (0-0.1%) Enzymes (0-1.5%) Fragrance (0-1%) Optical Brightener (0.02-2%) Softening Agent (0-7%) Premium Laundry Formula INGREDIENTS % Wt. RANGE FUNCTIONALITY DODECYL BENZENE SULFONIC ACID 10-15 Primary Anionic Surfactant SODIUM ALKYL ETHER SULFATE 7-10 Primary Anionic Surfactant LINEAR ALCOHOL ETHOXYLATE 12-18 Primary Nonionic Surfactant SODIUM XYLENE SULFONATE 2-4 HARDENED COCONUT FATTY ACID 0.5-2 SODIUM HYDROXIDE (50% solution) 3-5 BORAX PENTAHYDRATE Hydrotrope Foam Modifier Neutralizer 0.5-3 Stabilizer PROPYLENE GLYCOL 1-3 Stabilizer CITRIC ACID (50% solution) 2-4 Builder TRIETHANOLAMINE 0.25-1 pH Buffer MONOETHANOLAMINE 0.25-1 pH Buffer 0.05-1.5 Brightener FLUORESCENT WHITENING AGENT PROTEASE 0.5-2 Enzyme AMYLASE 0.2-1 Enzyme q.s..to 100 Additives DI WATER, FRAGRANCE, COLORANT AND PRESERVATIVE Economy Laundry Formula INGREDIENTS % Wt. RANGE FUNCTIONALITY DODECYL BENZENE SULFONIC ACID 3-7 Primary Anionic Surfactant SODIUM LAURETH SULFATE 4-9 Primary Anionic Surfactant LINEAR ALCOHOL ETHOXYLATE 5-8 Primary Nonionic Surfactant SODIUM CARBONATE (100% powder) 2-4 pH Buffer/Builder SODIUM HYDROXIDE (50% solution) 0.5-2 Neutralizer FLUORESCENT WHITENING AGENT 0.0-0.2 Brightener q.s.to 100 Additives DI WATER, FRAGRANCE, COLORANT AND PRESERVATIVE Performance Testing Cleaning Performance • Washing: ASTM Methods D 4265-98 (stains) and D 3050-07 (artificial soils) – – – – HE (High Efficiency) and top loading machines Temperature controlled wash and rinse 6-lb ballast Purchased standard stained/soiled fabrics with dust sebum, clay, grass, red wine, cocoa, coffee, blueberry, blood/ink/milk, make-up among others – Duplicate washes • Data Analysis: – Hunter Spectrophotometer Software and LabScan XE sensor SRI = 100 - (L - L ) clean washed DSRI = SRIexperimental - SRIcontrol 2 + (a clean - a washed 2 ) + (b clean - b washed 2 ) Regulatory Environment Some Regulatory Matters… Item 1,4-Dioxane At Issue… Hair Shampoo Laundry Detergent Carcinogen Yes No Diethanolamide Carcinogen Yes No Alkyl Phenol Ethoxylates No Yes Nitrosamine Reproductive, Developmental effects Carcinogen Yes No Phosphates Eutrophication Yes Yes Summary • Surfactants are the key to both laundry detergent and hair shampoo formulations • There are several similarities and differences between laundry detergent and hair shampoo formulations • Personal Care formulators can formulate laundry detergents too with a little know how • Never use a laundry detergent as a substitute for hair shampoo !! References Available Upon Request Contact information: Jeff Easley Sr. Global Performance Improvement Specialist Stepan Company Direct Dial: 847-501-2239 Fax: 847-446-9359 Email: jeasley@stepan.com