ACUSOL 830 Rheology Modifier and Stabilizer

Transcription

1 ACUSOL 830 Rheology Modifier and Stabilizer Description ACUSOL 830 is an Alkali Soluble acrylic polymer Emulsion (ASE). ACUSOL 830 can be directly incorporated into formulations without preparation of a separate thickener solution. Viscosity is developed simply by adjusting the ph on the alkaline side with any base. It is supplied as low viscosity emulsion and therefore is easy to handle. ACUSOL 830 contains carboxylic groups that immediately swell upon neutralization. Floor cleaners Window and windscreen cleaners Solvent based cleaners Paint strippers Alcohol and glycerine thickeners Lubricant emulsions Peroxide based cleaners/sanitizers Pigment suspensions Antifreeze products Liquid laundry detergents Silicone emulsions Features Polar solvent compatibility Gel appearance Salt tolerance Liquid Anionic Emulsion technology Instant neutralization Shear thinning Excellent viscosity stability over time Better high shear stability than typical thickeners Suspension Benefits Suitable for stable, viscous formulations containing high levels of polar solvents (ethyl alcohol, isopropyl alcohol, glycerol). Produces thick and stable fashionable clear formulations. Compatible with Ca and Mg. Compatible with up to 7% NaCl. Low sensitivity to water hardness and to ionic strength of inorganic ingredients. Supplied as low viscosity easy to handle liquid emulsion. No predissolution, declumping or warming required. Can be thickened instantaneously with any alkali. Compatible with both nonionic and anionic surfactants, builders and fillers. Water based polymerization. No residual solvents like many typical thickeners. No residual organic initiators. Permits continuous manufacturing process through in-line static mixers. Permits formulations of detergents that flow readily from the container. Formulations exhibit very little viscosity drift and remain stable during challenges of temperature variations. Gives greater freedom in order of addition during processing when homogenizers are used. Ability to suspend visual cues such as air bubbles, particulates, pigments, etc. Performance Properties Effect of ph ACUSOL 830 is an effective thickener/stabilizer over the ph range of 6.5 to 12.5.

2 Effect of Temperature The shear thinning effect imparted by ACUSOL 830 is lower than that obtained with ACUSOL 820 and very close to the cellulosics one. Thickening undergoes a modest decrease throughout a temperature range of 20 C to 75 C, but will recover viscosity on cooling. Thickening of Polar Solvents ACUSOL 830 is the product of choice to thicken and stabilize a variety of alcoholic solutions. The thickening efficiency of ACUSOL 830 (sodium form) is shown in Table 1, Table 2 and Figure 3. More hydrophobic organic amines will be appropriate to thicken less polar solvents. ACUSOL 830 is suitable to thicken up to 60% alcohol. To thicken these high levels of alcohols it is recommended to add approximately one half of the required alkali for neutralization prior to the addition of alcohol, followed by the balance of the alkali. The viscosity of glycerin and propylene glycol solutions thickened with ACUSOL 830 is shown in Table 1 and Table 2.

3 Table 1 - Glycerin Solvent % Water % ACUSOL Month Viscosity , , , , ,100 Table 2 - Propylene Glycol Solvent % Water % ACUSOL Month Viscosity ,200 Figure 3 shows the thickening efficiency of ACUSOL 830 in various polar solvents. The solvents are at 50% concentration in water. Suspension of Particulates Many difficult to suspend particles and pigments, like red iron oxide (Fe 2 O 3 ), can be thickened and stabilized with ACUSOL 830. Even slurries of particulates can be stabilized with ACUSOL 830. Table 3 shows stable kaolin slurries

4 created with low levels of ACUSOL 830. Table 3 - Stabilizing of 30% Kaolin Clay Slurry ACUSOL 830 Viscosity (mpa.s) 12 rpm , , ,000 Effect of Alkalies ACUSOL 830 can be neutralized and hence activated by a wide range of both inorganic and organic bases. Choice of the base is dependent upon the intended application, specific ingredients and personal preference. In many simple detergent systems the choice is often NaOH, KOH or NH 4 OH. Amines are sometimes preferred, such as TEA (triethanolamine), DEA (diethanolamine), AMP (aminomethylpropanol), AMPD (aminomethylpropanediol), etc. For products with high level of organic solvents, such as window cleaners, paint strippers, antifreeze products, etc., alkanolamines of higher molecular weight or more hydrophobic amines are preferred, such as tetrahydroxypropylethylene diamine, PEG-15 cocoamine, etc. The choice of the amine can slightly affect the formulation viscosity as shown below: Table 4 - ACUSOL 830 Neutralization with Various Bases 1% dry polymer - Brookfield Viscosity (mpa.s) at 12 rpm ph = 7 ph = 9 NH 4 OH 3,700 3,200 TEA 5,500 5,500 KOH 3,900 4,300 Typical Physical Properties These properties are typical but do not constitute specifications. Appearance Type Charge Solids, % 28 Off white milky liquid Alkali swellable thickener Anionic ph (as supplied) Density 1.05 Viscosity (as supplied) Equivalent weight* 218 *grams of dry polymer neutralized by 1 eq of NaOH 10 mpa.s/cps Storage/Handling This emulsion product as supplied will irreversibly coagulate upon freezing. Keep from freezing. Toxicology Profile Overall Evaluation ACUSOL 830 is considered non-toxic by single oral, dermal and inhalation exposure and no more than slightly irritating to the eyes. Although this product was considered slightly irritating to rabbits in a dermal LC 50 study, it

5 was found to be non irritating and non sensitizing in humans. ACUSOL 830 is considered non-mutagenic to bacteria. ACUSOL 830 is considered non-toxic to aquatic organisms, non-toxic to sludge bacteria and moderately bioeliminable. Toxicity Test/Species Toxicity, Acute Oral LD 50 - rat Dermal LD 50 - rabbit Skin irritation - rabbit Eye irritation - rabbit Inhalation LC 50-1 hr - rat Toxicity, Genetic Ames test Toxicity, Sensitization Human Patch Test (HRIPT) Toxicity, Environmental Algae EC hr Daphnia magna LC hr Fathead Minnow LC hr Inherent biodegradation Activated sludge respiration inhibitor Microtox assay EC min Results > 5gr/kg - non-toxic > 5gr/kg - non-toxic slightly irritating slightly irritating > 16.3 mg/l - non-toxic non-mutagenic with and without metabolic activation in bacterial mutagenicity assay non-irritating and non-sensitizing > 342 ppm > 1000 mg/l > 1000 mg/l non-biodegradable, but moderately bioeliminable > 100 mg/l > 300 ppm Material Safety Data Sheets MSDS are available for all Rohm and Haas 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. We recommend that you obtain copies of the MSDS from your Rohm and Haas technical representative or from the sales office nearest to you, before using our products in your facilities. We also suggest that you contact your suppliers of other materials recommended for use with our products for appropriate health and safety precautions before using them. To obtain samples, technical assistance, a Material Safety Data Sheet (MSDS) or to have a technical representative call for an appointment, contact the nearest Rohm and Haas branch office. ACUSOL is a trademark of Rohm and Haas Company, or of its subsidiaries or affiliates. The Company s policy is to register its trademarks where products designated thereby are marketed by the Company, its subsidiaries or affiliates. These suggestions and data are based on information we believe to be reliable. They are offered in good faith, but without guarantee, as conditions and methods of use of our products are beyond our control. We recommend that the prospective user determine the suitability of our materials and suggestions before adopting them on a commercial scale. Suggestions for uses of our products or the inclusion of descriptive material from patents and the citation of specific patents in this publication should not be understood as recommending the use of our products in violation of any patent or as permission or license to use any patents of the Rohm and Haas Company. Rohm and Haas, 2008 All rights reserved. February 2003 CS-758