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1、TAMOL Dispersants Product Solutions Guide Dow Coating Materials TAMOLSaltSolidsUse Level (on pigment)Benefits Polyacid Dispersants 945Na45%0.3 - 1.0% Excellent cost/performance balance. Excellent color acceptance with high reproducibility. Low odor. Low-foam generator. 1254Na35%0.3 - 1.0% Broad form
2、ulating latitude and cost/performance balance. Low-foam. Good color acceptance and stability with active pigments. 851Na30%0.6 - 1.0% High efficiency with low-foam generation. Excellent stability in paints containing ZnO and other reactive pigments. 901NH430%0.6 - 1.0% Low-foam generator. Excellent
3、stability. Ammonia version of TAMOL 851 Dispersant. 963NH435%0.3 - 1.0%Low-cost, low-foam generator. Good water resistance. Hydrophilic Copolymer Dispersants 1124NH450%0.5 - 1.0% High-gloss potential. Broad formulating latitude. Cost/performance balance. Low-foam generator. SG-1NH435%0.7 - 1.0% High
4、-gloss potential. Broad formulating latitude. Cost/performance balance. Low-foam generator. Hydrophobic Copolymer Dispersants 165ANH421%0.6 - 1.0% Excellent early blister resistance and wet adhesion. Good color acceptance. Good gloss development and corrosion resistance. 731ANa25%0.7 - 1.0% Excellen
5、t overall compatibility. Good pigment wetting. Highly efficient performance. 681NH435%1.0% - 5.0% Maximizes gloss potential. Good stability in paints containing ZnO and other reactive pigments. Good corrosion resistance. 2011K23%1.0% - 5.0% Low-odor, solvent free* capability. Maximizes gloss potenti
6、al. Good stability with ZnO. Good corrosion resistance. 2002n/a42%1.0% - 5.0% Low pH to allow for neutralizer choice. Low-odor, solvent-free* capability. Maximizes gloss potential. Good stability with ZnO. Good corrosion resistance. Trademark of The Dow Chemical Company (“Dow”) or an affiliated comp
7、any of Dow 2013 The Dow Chemical Company 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, the Customer is responsible for determining whether produ
8、cts and the information in this document are appropriate for the Customers use and for ensuring that the Customers workplace and disposal practices are in compliance with applicable laws and other governmental enactments. The product shown in this literature may not be available for sale and/or avai
9、lable 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
10、otherwise expressly noted. NO WARRANTIES ARE GIVEN; ALL IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE ARE EXPRESSLY EXCLUDED. TAMOLSolids* Acid Homopolymers 1254/9450.3% - 0.75% 8510.6% - 1.0% Hydrophilic Copolymers 11240.5% - 1.0% Hydrophobic Copolymers 2011, 681, 20021.
11、0% - 5.0% 731A/165A0.75% - 1.5% Dispersant Level Guidelines * With TiO2 slurries, subtract 0.2% to 0.5% * Manufactured without added solvent. For more information, contact Dow Coating Materials US Toll Free 800-447-4369 Form No. 884-00336-1013-NAR-EN-GS 3305_DCM_WCS_Tamol Brochure.indd 1-215/10/2013
12、 10:48 pg 2pg 3 Polymeric Dispersants The most prevalent dispersant molecules used are polymeric dispersants. There are two categories of polymeric dispersant: polyacid homopolymer and polyacid copolymer types. The polyacid copolymer category can be further broken into two sub- categories: hydrophil
13、ic and hydrophobic copolymers. The category of dispersant chosen depends on efficiency, rheology modifier compatibility, ZnO compatibility, and other film performance criteria expected for a particular formulation. Polymeric dispersant molecules tend to be lower in molecular weight, ranging from 1,0
14、00 to 20,000 daltons. Getting More From Your Paint The goal of the dispersion phase in the paint making process is to mechanically separate pigment particles by high- shear and stabilize these pigment particles for optimum performance. Properly dispersing and stabilizing pigment particles will help
15、improve the light scattering for better hide and a tighter, more durable coating. If not properly stabilized, the pigment particles in dispersion will re-agglomerate over time and thus provide lower gloss, poor hiding and reduced durability. Dispersant molecules play an active role in this phase. Th
16、e role of a dispersant molecule is to prevent re-agglomeration of dispersed pigment particles over time; this is key to developing a high-performance, durable coating for any surface you want to protect. As-supplied pigment is agglomerated. Grinding reduces agglomeration. Grinding Polyacid Homopolymer Dispersants Polyacid homopolymers are made by polymerizing acrylic, methacrylic, crotonic, or maleic acids together. These homopolymers are supplied in the neutralized for
