ACRYSOL RM-5000 Rheology Modifier

Transcription

1 Technical Data Sheet ACRYSOL RM-5000 Description ACRYSOL RM-5000 is a solvent-free* nonionic associative rheology modifier suitable for both interior and exterior latex paints. It offers a nearly Newtonian viscosity profile that yields a very appealing balance of flow and leveling properties and exceptional film build. What distinguishes from other HEUR products is its excellent efficiency in building viscosity in the upper end of the shear spectrum and the ability to furnish truly outstanding flow properties in all types of paints. The exceptional efficiency of as much as 20 to 40 percent more effective in generating high-shear (ICI) viscosity in a typical architectural coating formulation (Table 1) can yield major benefits. First is an opportunity for a notable savings in raw material costs. Just as important, by allowing formulators the opportunity to reduce the amount of thickening agent in their formulations, facilitates better corrosion and water resistance possible. The outstanding efficiency of in co-thickened formulations is shown in Figure 1. * - manufactured without added solvent Page 1 of 12 ACRYSOL RM-5000 / Dow Coating Materials 03/2013, Rev. 0

2 Feature and Benefits Features Efficient mid - and high-shear Viscosity development Excellent flow and leveling, hiding uniform film formation and gloss development Solvent - free*, water based Supplied as low viscosity liquid Benefits Excellent brush drag,film build,spatter resistance; reduced levels required for comparable rheology Excellent finished paint appearance Low - VOC formulations Easy handling and incorporation into paint mix Typical Physical Properties The following properties are typical but should not be considered specifications Properties Typical Values Apperance Hazy off-white liquid Solids content, % Liquid phase water Brookfield C, as supplied, cp (max) 4,000 Density, lb/gal (U.S.) 8.7 The features offered by ACRYSOL RM-5000 make it especially valuable in both low-solids formulations based on conventional binders and highperformance, low-voc semigloss paints based on all-acrylic binders such as RHOPLEX SG-30 Emulsion. Both types of paints often require undesirably high levels of conventional HEUR modifiers. is also well suited to low-voc gloss enamels formulated with binders such as RHOPLE HG-700 Emulsion; it can sometimes serve as a sole thickening agent in such coatings. High-gloss enamels based on RHOPLEX HG-700 Emulsion can be formulated with to offer flow and sag resistance comparable to that of alkyd formulations. An example is Figure 2 showing that the high-gloss formulation containing on the left has virtually the same flow and sag properties as that of the high-gloss alkyd formulation on the right. Page 2 of 12 ACRYSOL RM-5000 / Dow Coating Materials 03/2013, Rev. 0

3 Classic HEUR Advantages Applications While giving exceptional thickening efficiency, ACRYSOL RM-5000 also offers all the attributes that have made other HEUR rheology modifiers so attractive. It builds viscosity through association, which results in paint films exhibiting more consistent gloss and hiding than formulations employing nonassociative (e.g., HEC) products. It is manufactured without the use of solvents, which makes it a valuable tool for formulators striving to meet increasingly stringent VOC limits. is supplied as a low-viscosity liquid that is easier to handle and formulate than powdered cellulosic products. Finally, it does not support microbial growth in the paint film. The ability of ACRYSOL RM-5000 to generate high-shear viscosity (Figure 3) makes it an especially valuable complement to-thickening agents designed primarily to build mid-shear (Krebs) viscosity (e.g., ACRYSOL RM-995, ACRYSOL RM-825,, and s) or low-shear (Brookfield) viscosity (e.g., ACRYSOL RM-12W and most cellulosics). By employing and one (or more) of these other agents, formulators can obtain a wide range of viscosity profiles in flat through gloss latex paints. Its aqueous nature also makes well suited for use in paint formulations containing low levels of VOC, no formaldehyde, and no free ammonia. Page 3 of 12 ACRYSOL RM-5000 / Dow Coating Materials 03/2013, Rev. 0

4 The balance of properties offered by ACRYSOL RM-5000 renders it particularly valuable in the following types of formulations: Paints based on solvent-free latex binders. High-opacity, high-build coatings for exterior substrates that require improved hiding and excellent exterior durability (water resistance). Interior wall paints based on all types of emulsions (e.g., ROVACE 9900, RHOPLEX SG-10M, and RHOPLEX SG-30 Emulsions); offers excellent performance and application properties in these formulations. Gloss paints formulated with small-particle hydrophobic acrylic gloss binders such as RHOPLEX HG-700 Emulsions; the outstanding flow and leveling properties and film continuity furnished by help facilitate uniform light reflectance. is particularly beneficial in low-solvent semigloss paints formulated with hydrophilic binders such as RHOPLEX SG-30 Emulsion. These binders have a surface treatment that offers them a greater associative thickener demand than many conventional all-acrylic binders. As a result, more traditional HEUR products do not provide sufficient ICI viscosity at economical use levels with these new emulsions. Such is not the case with due to its greater ICI-viscosity-building efficiency. Formulating Guidelines Generally speaking, the decision of how to use ACRYSOL RM-5000 by itself or with another modifier is dictated by the rheological needs of the paint formulation. As indicated previously, is similar to ACRYSOL RM-2020 NPR in that it is designed specifically to provide ICI viscosity in the upper end of the shear spectrum. Consequently, although it does provide some mid-shear (KU) viscosity, is typically used with a KU-building product such as ACYRYSOL RM-995. If sag resistance is a priority, manufacturers may be able to obtain the rheological character they seek with a combination of and a Brookfield efficient agent such as ACRYSOL RM-12W or s or a cellulosic agent. The use of as the sole thickening agent is generally limited to brush-applied gloss formulations based on hydrophobic, small-particle binders (e.g., RHOPLEX SG-10M Emulsion). In these formulations, is typically sufficiently effective at building mid-shear viscosity to eliminate the need for a complementary modifier. For roller application, however, should be used in combination with another thickener(s). More in-can structure can be attained by cothickening with ACRYSOL RM-995 or RM-825 s. The following table provides a brief guide to choosing the most appropriate combination of ACRYSOL RM-5000 and other HEUR rheology modifiers for different types of paint formulations. Page 4 of 12 ACRYSOL RM-5000 / Dow Coating Materials 03/2013, Rev. 0

5 ACRYSOL HEUR RHEOLOGY MODIFIER PACKAGE SELECTION GUIDE Emulsion RHOPLEX SG-20 RHOPLEX HG-700 RHOPLEX HG RHOPLEX SG-1O M RHOPLEX AC-347 RHOPLEX AC-261 RHOPLEX SG-30 EXP-3899 RHOPLEX AC-2508 RHOPLEX ML-200 RHOPLEX AC-264 High Volume Solids (>36%) ACRYSOL RM- 2020NPR ACRYSOL RM-SW ACRYSOL RM- 2020NPR ACRYSOL RM-SW ACRYSOL RM- 2020NPR ACRYSOL RM-5000 ACRYSOL DR-300 HEC Standard Volume Solids (32-36%) ACRYSOL RM-2020NPR ACRYSOL DR-300 HEC Low Volume Solids (<31%) ACRYSOL DR-300 HEC High PVC (>35%) General Comments ACRYSOL DR-300 HEC or can be used to increase KU and Brookfield response in lowsolids and/or high-pvc formulations. As volume solids drop or PVC increases, ratio of Rheology Modifier should increase commensurately. or can be used to increase KU and Brookfield response in lowsolids and/or high-pvc formulations. As volume solids drop or PVC increases, ratio of Rheology Modifier should increase commensurately. Rheology Modifier is primary ICI builder. Will generate more KU in stardard and high volume solid paints. ACRYSOL RM- 8W or should be used to improve KU and Brookfield performance. ACRYSOL SCT: better fit in lower volume solids paint. ACRYSOL RM-2020NPR: better fit in higher volume solids paint. RHOPLEX SG-30 and EXP require ACRYSOL SCT- 275 for Increased sag resistance. As volume solids drop or PVC increases, levels of ACRYSOL SCT-275 and ACRYSOL RM should generally increase ACRYSOL DR-300 is primary choice for exterior paints. Rheology Modifier and ACRYSOL RM should be used in combination with HEC to lmprove flow and leveling and increase ICI viscosity. Page 5 of 12 ACRYSOL RM-5000 / Dow Coating Materials 03/2013, Rev. 0

6 Vinyl Acrylic/ Acrylic Blends ACRYSOL RM-6000 Rheology modifier entries are color-coded to indicate the types d viscosity they provide in a particutar thickener package: Red = Stormer viscosity builder Blue = ICI viscosity builder Green = Brookfield viscosity builder Black = HEC or an HEC replacement Increased levels of ACRYSOL SCT-275 required to enhance KU and Brookfield viscosity. Additional levels of RM-6000 or Rheology Modifier to improve ICI viscosity. Determining Appropriate ACRYSOL Usage Levels As with any thickening agent, the paint manufacturer s principal task in formulating ACRYSOL RM-5000 centers on determining the proper use level. Most needs can be satisfied with an amount of ranging from 5.0 to 25.0 pounds per 100 gallons of paint; the specific quantity required depends on a number of factors. Like all HEUR rheology modifiers, functions principally through its interactions or associations with other ingredients in the paint formulation. Consequently, any factor that affects the ability of to associate can impact the amount of rheology modifier required. Such factors include other formulation ingredients, as well as ph and volume solids of the formulation. Effect of Formulation Ingredients Binder Generally speaking, the nature of the binder particle size and size distribution, composition, and stabilizing system plays the largest role in determining how much thickener a formulation will need. Small-particle hydrophobic binders (e.g., RHOPLEX SG-10M Emulsion) encourage association, so ACRYSOL RM-5000 will be most efficient in thickening formulations based on these emulsions. Interfacial Agents The choice of interfacial agents (surfactants and dispersants) can also help govern the thickening efficiency of because they affect its ability to react with the solid elements in the paint. Surfactants The hydrophobic nature of surfactants allows them to compete with rheology modifier for adsorption onto binder particle surfaces. If the surfactant is able to displace the rheology modifier from binder particles completely, the modifier s ability to form associations, and thus provide viscosity especially in the low-shear range is inhibited. Thus, the type and quantity of surfactants employed in the paint formulation become extremely important. The formulator must also be wary of predispersed colorants in this regard; these products generally contain surfactants for stability and color acceptance. Page 6 of 12 ACRYSOL RM-5000 / Dow Coating Materials 03/2013, Rev. 0

7 Dispersants When using ACRYSOL RM-5000, formulators should avoid polyacid dispersants such as TAMOL 850, TAMOL 963, and TAMOL 1254 Dispersants if at all possible. The carboxyl functionality of these products provides large concentrations of ions that make HEUR thickeners insoluble. The result can be phase separation, possibly even syneresis. In testing conducted by Dow scientists, good results have been achieved with standard acid copolymer dispersants. TAMOL 731A Dispersant has performed best in matte paints; TAMOL 1124 Dispersant has distinguished itself in semigloss formulations; and TAMOL 681 and TAMOL 165 A Dispersants have proven themselves the top choices for high-gloss paints. Cosolvents Solvents that are not soluble in water have little or no effect on the rheology of paints containing ACRYSOL RM Water-miscible cosolvents, however, tend to inhibit the degree of association achieved with this new HEUR modifier and so compromise its ability to provide mid-shear viscosity. The effect that water-miscible cosolvents can have varies. Testing has demonstrated that products such as ethylene glycol and propylene glycol have the least impact; butyl CARBITOL Solvent has the most. The viscosity-suppressing ability of these products makes it possible for formulators to use them in reducing low-shear (Brookfield) viscosity, thereby enhancing flow and leveling. There are drawbacks to using solvents in this fashion, however. They increase raw material costs, and because they are water-soluble, they may reduce the paint s water resistance. Of course, as in the case of interfacial agents, the formulator must account for the cosolvent contributed by predispersed colorants. Paint ph Control Incorporation Starting Point Formulations In some paints, high ph can cause the binder particles to swell, elevating viscosity and causing instability. To help manufacturers obtain the rheological properties they expect when formulating with ACRYSOL RM-5000 and to avoid stability problems, ph should be maintained in the range from 8.5 to 9.0 inclusive. In ammonia-free, low-voc formulations, we have successfully used permanent bases such as sodium or potassium hydroxide or amines to accomplish this objective. ACRYSOL RM-5000 is supplied as a pourable, pumpable liquid that contains no added solvent. It can be added to the paint at any stage of the manufacturing process. Following are four starting point formulations that employ ACRYSOL RM-5000 Rheology Modifier. These formulations have been qualified with the specified components; substitutions should be tested carefully to ensure that users obtain the same properties reported here. Page 7 of 12 ACRYSOL RM-5000 / Dow Coating Materials 03/2013, Rev. 0

8 LOW-VOC INTERIOR/EXTERIOR* SEMIGLOSS PAINT WITH RHOPLEX TM SG-30 Emulsion, ROPAQUE TM Ultra Opaque Polymer Ingredient Pounds Gallons Water Propylene glycol KATHON TM LX 1.5% Preservative Ti-Pure R-746 titanium dioxide Grind the above in a high speed Cowles mixer for 15 to 20 minutes, then let down with the following: RHOPLEX SG-30 Emulsion ROPAQUE Ultra Opaque Polymer Texanol coalescent Aerosol OT-75 surfactant Byk-022 defoamer 4 or equivalent Ammonia (28%) ACRYSOL SCT Water TOTALS Equilibrated Stormer viscosity, KU 100 ± 2 Equilibrated ICI viscosity, poise 1.4 ± 0.1 Initial ph 9.0 ± 0.1 Total PVC,% 28 Volume solids,% 34 VOC, g/l <150 1 E.I. Dupont de Nemours Company 2 Eastman Chemical Company 3 Cytec- ChemicaI 4 Byk-Chemie *Formulations designed for exterior use should contain an appropriate biocide (e.g, SKANE TM M-8) for mildew protection Page 8 of 12 ACRYSOL RM-5000 / Dow Coating Materials 03/2013, Rev. 0

9 LOW-VOC INTERIOR/EXTERIOR* SEMIGLOSS PAINT WITH RHOPLEX HG-700 Emulsion Ingredient Pounds Gallons RHOPLEX HG-700 Emulsion Byk-022 defoamer 1 or equivalent Texanol coalescent TRITON X-405 Suofactant KATHON LX 1.5% Preservative Ti-Pure R-746 titanium dioxide Grind the above in a high speed Cowles mixer for 15 to 20 minutes, then let down with the following: Premix and add slowly with adequate agitation: Water Sodium benzoate Premix and add slowly with adequate agitation: Water TAMOL 681 Dispersant Propylene glycol ACRYSOL RM TOTALS Equilibrated Stormer viscosity, KU 95 ± 2 Equilibrated ICI viscosity, poise 1.5 ± 0.1 Initial ph 9.0 ± 0.1 Total PVC,% 19 Volume solids,% 36 VOC, g/l <150 1 Byk-Chemie E.I. Dupont de Nemours Company 2 Eastman Chemical Company 3 E.I. Dupont de Nemours Company *Formulations designed for exterior use should contain an appropriate mildewcide (e.g. SKANE M-8) Page 9 of 12 ACRYSOL RM-5000 / Dow Coating Materials 03/2013, Rev. 0

10 LOW-VOC INTERIOR SEMIGLOSS PAINT WITH RHOPLEX TM SG-10M Emulsion, ROVACE TM 9900 Emulsion, ROPAQUE TM Ultra Opaque Polymer Ingredient Pounds Gallons Water TAMOL TM 1124 Dispersant TRITON TM CF-10 Surfactant Byk-022 defoamer 1 or equivalent AMP-95 TM Base KATHON TM LX 1.5% Preservative Ti-Pure R-746 titanium dioxide Grind the above in a high speed Cowles mixer for 15 to 20 minutes, then let down with the following: RHOPLEX TM SG-10M Emulsion ROVACE TM 9900 Emulsion ROPAQUE TM Ultra Opaque Polymer Texanol coalescent Byk-022 defoamer or equivalent Ammonia (28%) ACRYSOL TM SCT ACRYSOL RM Water TOTALS Equilibrated Stormer viscosity, KU 90 ± 2 Equilibrated ICI viscosity, poise 1.4 ± 0.1 Initial ph 9.5 ± 0.1 Total PVC,% 24 Volume solids,% 34 VOC, g/l <100 1 Byk-Chemie 2 E.I. Dupont de Nemours Company 3 Eastman Chemical Company Page 10 of 12 ACRYSOL RM-5000 / Dow Coating Materials 03/2013, Rev. 0

11 LOW-VOC EXTERIOR FLAT PAINT WITH RHOPLEX TM MULTILOBE TM 200 Emulsion, ROPAQUE TM Ultra Opaque Polymer Ingredient Pounds Gallons Water TAMOL TM 731A Dispersant KTPP TRITON CF-10 Surfactant Colloids 643 defoamer KATHON TM LX 1.5% Preservative SKANE TM M-8 Mildewcide CELLOSIZE QP15000H Hydroxyethylcellulose or equivalent Ti-pure R-706 titanium dioxide Eagle Zinc 417 zinc oxide Minex 4 extender Attagel 50 attapulgite Grind the above in a high speed Cowles mixer for 15 to 20 minutes, then let down with the following: RHOPLEX TM MULTILOBE 200 Emulsion ROPAQUE Ultra Opaque Polymer Texanol coalescent Propylene glycol Colloids 643 defoamer Ammonia (28%) ACRYSOL RM Water TOTALS Equilibrated Stormer viscosity, KU 95 ± 2 Equilibrated ICI viscosity, poise 1.4 ± 0.1 Initial ph 9.5 ± 0.1 Typical gloss, 60 /85 6/7 Total PVC,% 45 Volume solids,% 38 VOC, g/l <100 1 Rhone-Poulenc 2 E.I. Dupont de Nemours Company 3 Eagle Zinc Company 4 Unimin Corporation 5 Engelhard Corporation 6 Eastman Chemical Co. Page 11 of 12 ACRYSOL RM-5000 / Dow Coating Materials 03/2013, Rev. 0

12 Handling Precautions Storage Disposal Considerations 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. 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 Coating Materials Technical Representative for more information. Chemical Registration Product Stewardship Customer Notice Many countries require the registration of chemicals, either imported or produced locally, prior to their commercial use. Violation of these regulations may lead to substantial penalties imposed upon the user, the importer or manufacturer, and/or cessation of supply. It is in your interests to ensure that all chemicals used by you are registered. Dow does not supply unregistered products unless permitted under limited sampling procedures as a precursor to registration. 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. Trademark of The Dow Chemical Company ( Dow ) or an affiliated company of Dow NAR-EN-CDP Page 12 of 12 ACRYSOL RM-5000 / Dow Coating Materials 03/2013, Rev. 0