PARALOID AU-1033 Acrylic Polyol with Low Isocyanate Demand For Coatings on Recreational Equipment and Fleet Refinishing

Transcription

1 Technical Data Sheet PARALOID AU-1033 Acrylic Polyol with Low Isocyanate Demand For Coatings on Recreational Equipment and Fleet Refinishing Introduction Features and Benefits Typical Physical Properties 1 PARALOID AU-1033 Acrylic Polyol is specifically designed to crosslink with isocyanates at ambient temperatures. Coatings based on these resins achieve fast lacquer-like dry properties with some trade-off in flexibility and impact resistance. Typical uses of these coatings are recreational equipment, fleet refinishing, and other areas not requiring a high degree of chemical resistance. Provides lacquer-like dry properties which reduce equipment downtime. Reduces formulation costs because of lower isocyanate demand. Maintains film integrity when exposed to corrosive chemicals. Maintains gloss and color thereby reducing the need to repaint. Property Typical Values Nonvolatiles Content (105 C), % 50 Solids Content (105 C), % 46.5 Viscosity, cps (25 C) 6000 Solvent, 55/25/20 PA Acetate/Ethyl Benzene/ VM+P Naphtha Hydroxyl Equivalent Weight 1,000 Solids Basis Density, lbs/gal, (25 C) 8.5 As Supplied Bulk Density, gal/lbs, (25 C) Tg, C 65 Molecular Weight 35, These properties are typical but do not constitute specifications. Page 1 of 5 PARALOID AU-1033 Acrylic Polyol with Low Isocyanate Demand Form No NAR-EN-CDP

2 Table 1: Application and Performance Properties of Urethane Coating Based on PARALOID AU-1033 Acrylic Polyol/Desmodur N 75BA Hardener Application Properties; 2 mils dry, on treated aluminum panels Set to Touch Time, min Tack Free Time (500 grams Zapon), min. Viscosity Profile; Pot Life #4 Ford Cup, sec. Initial 21 1 hr hrs hrs. 40 Performance Properties (2 Weeks Ambient Cure) Hardness Pencil Knoop Hardness Number Gloss Flexibility, Mandrel 1/8" 1/2" Impact Resistance (in.-lb.) Direct Reverse Chemical Resistance (Pencil Hardness) Initial 6 hrs. 10% NaOH 6 hrs. 10% HCl 6 hrs. 10% Acetic Acid 30 min. Cleaning Solution Butyl CELLOSOLVE Coalescent/ Water/Ammonia (50/47/3) 30 min. Toluene 30 min. PM Acetate 4H Cracks No Cracks H 2H 2H HB F 6B 3H Formulating Suggestions The two-component formulation given herein is recommended for initial evaluation of PARALOID AU-1033 Acrylic Polyol. The recommended ratio (solids basis) for PARALOID AU-1033 Acrylic Polyol aliphatic isocyanate is 83.4/16.6 weight percent. This corresponds to a slight excess of isocyanate resin (1.0/1.05 meq hydroxyl/isocyanate). For best pot life, polyurethane grade solvents are recommended and contamination with water should be avoided. The following formulating suggestions are offered: Catalyst Suggestions Coatings using PARALOID AU-1033 Acrylic Polyol develop properties more rapidly with the use of a tin catalyst such as Dabco T-12 dibutyltin dilaurate. In practice, we recommend levels of 0.01 to 0.05% based on vehicle solids. Zinc octoate at levels of 0.02 to 0.06% is also recommended. The lower levels appear to be better for chemical resistance properties and extended pot life, while the higher provides very rapid dry times. Flow Aid In many formulations, the addition of a flow aid is beneficial. Either SF1023 silicone or Byk-300 silicone surface additive can be tried in this application at a maximum of 0.1% on total resin solids. Page 2 of 5 PARALOID AU-1033 Acrylic Polyol with Low Isocyanate Demand Form No NAR-EN-CDP

3 UV Absorbers The addition of UV absorbers and light stabilizers (1% each of Tinuvin 328 and Tinuvin 292 liquid light absorbers on total resin solids) can enhance the weathering properties of acrylic urethane coatings. Isocyanate Aliphatic (hexamethylenediisocyanates; HMDI) isocyanates are recommended for best weathering properties. The isocyanurates of HMDI, such as Desmodur N 3300 hardener and Luxate HT2000 polyisocyanate, impart better appearance durability in PARALOID AU-1033 Acrylic Polyol urethane coatings than the biurets of HMDI, such as Desmodur N 75 hardener. Either Desmodur N 3300 hardener or Luxate HT2000 polyisocyanate can be substituted on an equal solids basis for Desmodur N 75BA hardener in the formulation given herein. Colorants Most colors can be produced using a sand mill grind in PARALOID AU-1033 Acrylic Polyol. In some instances, it may be preferable to use a grinding medium such as PARALOID DM-55 Solid Grade Thermoplastic Acrylic Resin. If predispersed colorants are preferred, we recommend the use of acrylic-based colorants. Defoamer Dehydran ARA7219 defoamer has been found to be an effective air release agent at 0.1 to 0.2% (on total paint weight) to minimize foam, particularly in airless spray applications. Table 2: Acrylic Urethane White Enamel Formulation Based on PARALOID AU-1033 Acrylic Polyol Materials Lbs Gal Sand Mill Grind Acrylic Component A PARALOID AU-1033 Acrylic Polyol Solvent Blend Ti-Pure R-960 titanium dioxide Sand grind the above for 20 minutes, filter and letdown with the following: PARALOID AU-1033 Acrylic Polyol Solvent Blend Byk-300 silicone surface additive Sub Totals: Isocyanate Component B Desmodur N 75BA hardener PM Acetate (PUG) Sub Totals: Component A and B Totals Physical Constants Weight Solids, % 50.2 Volume Solids, % 35.8 Pigment Volume Concentration, % 14.7 Pigment/Binder Ratio 36/64 Acrylic/Isocyanate Weight Ratio 83.4/16.6 Acrylic/Isocyanate Equivalent Ratio 1.0/1.05 Viscosity, #4 Ford Cup, sec., As Made Diluted to Spray 21 PM Acetate/Ethyl Benzene/VM+P Naphtha 55/20/25 Page 3 of 5 PARALOID AU-1033 Acrylic Polyol with Low Isocyanate Demand Form No NAR-EN-CDP

4 Safe Handling Information PARALOID AU-1033 Acrylic Polyol is expected to be moderately toxic via oral, dermal or inhalation exposure and moderately irritating to the skin, eyes, and respiratory tract. The product is highly flammable. Vapors can travel to a source of ignition and flash back. Heated material can form explosive vapors with air. The hazards associated with this product are due to the solvents. It is important that Material Safety Data Sheets be reviewed to assure safe handling and storage. Isocyanates, including Desmodur N 75BA hardener, recommended for formulation use in this bulletin are known health hazards if not handled properly. We, therefore, recommend that you contact your supplier of isocyanates for information regarding appropriate health and safety precautions for these materials prior to using them in your facilities. The Dow Chemical Company maintains Material Safety Data Sheets (MSDS) on all of its products. These sheets contain pertinent information that you may need to protect your employees and customers against any known health or safety hazards associated with our products. The Dow Chemical Company recommends that you obtain copies of our Material Safety Data Sheets on each of our products from your local Dow representative prior to its use in your facilities. We also suggest that you contact your supplier of other materials recommended for use with our products for appropriate health and safety precautions prior to their use. Page 4 of 5 PARALOID AU-1033 Acrylic Polyol with Low Isocyanate Demand Form No NAR-EN-CDP

5 Handling Precautions Before using this product, consult the Material Safety Data Sheet (MSDS)/Safety Data Sheet (SDS) for details on product hazards, recommended handling precautions and product storage. CAUTION! Keep combustible and/or flammable products and their vapors away from heat, sparks, flames and other sources of ignition including static discharge. Processing or operating at temperatures near or above product flashpoint may pose a fire hazard. Use appropriate grounding and bonding techniques to manage static discharge hazards. CAUTION! Failure to maintain proper volume level when using immersion heaters can expose tank and solution to excessive heat resulting in a possible combustion hazard, particularly when plastic tanks are used. Storage Disposal Considerations Store products in tightly closed original containers at temperatures recommended on the product label. Dispose in accordance with all local, state (provincial) and federal regulations. Empty containers may contain hazardous residues. This material and its container must be disposed in a safe and legal manner. It is the user's responsibility to verify that treatment and disposal procedures comply with local, state (provincial) and federal regulations. Contact your Dow Technical Representative for more information. Product Stewardship Customer Notice Dow has a fundamental concern for all who make, distribute, and use its products, and for the environment in which we live. This concern is the basis for our product stewardship philosophy by which we assess the safety, health, and environmental information on our products and then take appropriate steps to protect employee and public health and our environment. The success of our product stewardship program rests with each and every individual involved with Dow products from the initial concept and research, to manufacture, use, sale, disposal, and recycle of each product. Dow strongly encourages its customers to review both their manufacturing processes and their applications of Dow products from the standpoint of human health and environmental quality to ensure that Dow products are not used in ways for which they are not intended or tested. Dow personnel are available to answer your questions and to provide reasonable technical support. Dow product literature, including safety data sheets, should be consulted prior to use of Dow products. Current safety data sheets are available from Dow. Contact: North America: Latin America: (+55) Europe: (+800) Asia-Pacific: (+800) Notice: No freedom from infringement of any patent owned by Dow or others is to be inferred. Because use conditions and applicable laws may differ from one location to another and may change with time, Customer is responsible for determining whether products and the information in this document are appropriate for Customer's use and for ensuring that Customer's workplace and disposal practices are in compliance with applicable laws and other government enactments. The product shown in this literature may not be available for sale and/or available in all geographies where Dow is represented. The claims made may not have been approved for use in all countries. Dow assumes no obligation or liability for the information in this document. References to Dow or the Company mean the Dow legal entity selling the products to Customer unless otherwise expressly noted. NO WARRANTIES ARE GIVEN; ALL IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE ARE EXPRESSLY EXCLUDED. Page 5 of 5 Trademark of The Dow Chemical Company Form No NAR-EN-CDP