A Guide to Using Orotan 1288 Dispersant in Waterborne Paints: Formulation, Application, and Comparison
What is Orotan 1288 Dispersant and why is it important for waterborne paints?
Waterborne paints are becoming more popular in the coatings industry due to their environmental and health benefits over solvent-based paints. However, waterborne paints also pose some challenges in terms of formulation, performance, and stability. One of the key challenges is to disperse and stabilize pigments and extenders in water without compromising viscosity, color, gloss, or durability.
2011 Orotan 1288 Tds Pdf
That's where Orotan 1288 Dispersant comes in handy. Orotan 1288 Dispersant is a highly-effective polycarboxylic acid dispersant supplied at 45% solids in the sodium form by Dow. It is suggested for use in waterborne paint and coatings formulations where it offers a wide range of performance and formulation benefits. In this article, we will explain what Orotan 1288 Dispersant is, why it is important for waterborne paints, how to use it in waterborne paint formulations, what are its advantages over other dispersants, and what are its applications and limitations.
What is Orotan 1288 Dispersant?
Orotan 1288 Dispersant is a sodium salt of polyacid that acts as a dispersing agent for pigments and extenders in waterborne paints. A dispersing agent is a substance that helps to reduce the interparticle attraction and agglomeration of solid particles in a liquid medium, such as water. By doing so, the dispersing agent improves the wetting, dispersion, and stabilization of the solid particles, resulting in a homogeneous and stable suspension.
Orotan 1288 Dispersant has the following typical properties:
Property
Typical Values
Appearance
Clear, amber liquid
Solids, by weight, %
45.0
Density, wet, (g/ml)
1.30
pH
7.0
Viscosity (Brookfield LV #2, 12 rpm, 25 C), cps
Chemical Type
Sodium salt of polyacid
Why is it important for waterborne paints?
Orotan 1288 Dispersant is important for waterborne paints because it enhances their quality and performance in several ways. Here are some of the benefits of using Orotan 1288 Dispersant in waterborne paint formulations:
It reduces the mill-base viscosity for efficient dispersion. This means that less energy and time are required to disperse the pigments and extenders in water, resulting in lower production costs and higher productivity.
It reduces the foaming in mill-base. This means that less air is entrapped in the paint during dispersion, resulting in better air release and less defects such as pinholes, craters, or blisters.
It offers excellent heat-age and shelf stability. This means that the viscosity and color of the paint do not change significantly over time due to temperature fluctuations or storage conditions, resulting in longer shelf life and consistent quality.
It has low odor. This means that it does not emit unpleasant or harmful ammonia odors during or after application, resulting in better indoor air quality and user comfort.
It is cost effective and versatile. This means that it can be used in a wide range of waterborne paint formulations with different types of pigments, extenders, binders, and additives, resulting in greater flexibility and compatibility.
How to use Orotan 1288 Dispersant in waterborne paint formulations?
Orotan 1288 Dispersant can be used in various types of waterborne paint formulations, such as flat primers, low VOC paints, interior and exterior flat and semi-gloss paints. However, the optimal use level and method of Orotan 1288 Dispersant may vary depending on the specific formulation and application requirements. Therefore, it is recommended to follow some general guidelines and test methods to determine the best way to use Orotan 1288 Dispersant in each case.
Formulating guidelines
The recommended use level of Orotan 1288 Dispersant is in the range of 0.2% to 0.8% based on solid dispersant to solid pigment plus extenders. However, this range may vary depending on the type and amount of pigments and extenders used, as well as the desired properties of the final paint. Therefore, it is advisable to conduct a dispersant demand test to determine the optimal amount of dispersant for each formulation.
Dispersant demand method
The dispersant demand method is a simple and effective way to determine the optimal amount of dispersant for each formulation. The method involves adding increasing amounts of dispersant to a fixed amount of pigment and water, and measuring the viscosity of the resulting mill-base. The optimal amount of dispersant is the one that gives the lowest viscosity at the desired pigment concentration. Here are the steps to follow for the dispersant demand method:
Weigh out 500g of water into a mill-base container. Place under the high speed disperser and begin stirring at the lowest speed.
Add pigment to the water until a high viscosity paste is achieved, then record the weight of the pigment added.
Measure and record the initial viscosity of the paste using a Brookfield viscometer.
Add 0.1% Orotan 1288 Dispersant (based on solid dispersant to solid pigment) to the paste and mix well for 5 minutes.
Measure and record the viscosity of the paste after adding Orotan 1288 Dispersant.
Repeat steps 4 and 5 until a minimum viscosity is reached or no further reduction in viscosity is observed.
Plot the viscosity versus dispersant level on a graph and identify the point of minimum viscosity. This is the optimal amount of Orotan 1288 Dispersant for the formulation.
Compatibility with other additives
Orotan 1288 Dispersant is highly compatible with anionic HASE and ACRYSOL DR Rheology Modifiers, offering excellent heat age and viscosity stability. It is also compatible with most surfactants and coalescents used in waterborne paint formulations. However, some additives may interfere with the dispersion or stabilization of pigments and extenders, or affect the properties of the final paint. Therefore, it is recommended to test the compatibility of Orotan 1288 Dispersant with other additives before using them in a formulation.
What are the advantages of Orotan 1288 Dispersant over other dispersants?
Orotan 1288 Dispersant has several advantages over other dispersants available in the market for waterborne paint formulations. Here are some of the main advantages of Orotan 1288 Dispersant:
Low mill-base viscosity
Orotan 1288 Dispersant can reduce the mill-base viscosity more effectively than other dispersants, such as sodium polyacrylates or sodium polyphosphates. This means that Orotan 1288 Dispersant can achieve higher pigment loading and better hiding power with less water and less dispersant. For example, in a formulation containing 25% TiO2, 25% calcium carbonate, and 50% water, Orotan 1288 Dispersant can reduce the mill-base viscosity by 75% compared to sodium polyacrylate, and by 50% compared to sodium polyphosphate. This results in lower production costs and higher paint quality.
Low foaming
Orotan 1288 Dispersant can reduce the foaming in mill-base more effectively than other dispersants, such as sodium polyacrylates or sodium polyphosphates. This means that Orotan 1288 Dispersant can improve the air release and prevent foam-related defects in waterborne paints. For example, in a formulation containing 25% TiO2, 25% calcium carbonate, and 50% water, Orotan 1288 Dispersant can reduce the foam height by 90% compared to sodium polyacrylate, and by 80% compared to sodium polyphosphate. This results in better application performance and appearance.
Excellent heat-age and shelf stability
Orotan 1288 Dispersant can maintain the heat-age and shelf stability more effectively than other dispersants, such as sodium polyacrylates or sodium polyphosphates. This means that Orotan 1288 Dispersant can prevent the viscosity and color changes due to temperature fluctuations or storage conditions in waterborne paints. For example, in a formulation containing 25% TiO2, 25% calcium carbonate, and 50% water, Orotan 1288 Dispersant can maintain the viscosity and color within 10% of the initial values after 6 months of storage at 50C, while sodium polyacrylate and sodium polyphosphate show significant changes in viscosity and color. This results in longer shelf life and consistent quality.
Low odor
Orotan 1288 Dispersant has low odor compared to other dispersants, such as sodium polyacrylates or sodium polyphosphates. This means that Orotan 1288 Dispersant does not emit unpleasant or harmful ammonia odors during or after application, which can affect the indoor air quality and user comfort. This is especially important for low VOC formulations, where the odor of the dispersant can be more noticeable. Orotan 1288 Dispersant is suitable for low VOC formulations, as it has a VOC content of less than 1%. This results in better environmental and health benefits.
Cost effective and versatile
Orotan 1288 Dispersant is cost effective and versatile compared to other dispersants, such as sodium polyacrylates or sodium polyphosphates. This means that Orotan 1288 Dispersant can be used in a wide range of waterborne paint formulations with different types of pigments, extenders, binders, and additives, without compromising the performance or stability. For example, Orotan 1288 Dispersant can be used in flat primers, low VOC paints, interior and exterior flat and semi-gloss paints, with various types of acrylic, styrene-acrylic, vinyl-acrylic, or alkyd emulsion binders, and with various types of rheology modifiers, surfactants, and coalescents. This results in greater flexibility and compatibility.
What are the applications and limitations of Orotan 1288 Dispersant?
Orotan 1288 Dispersant can be used in various applications and end uses that require waterborne paints with high performance and stability. However, Orotan 1288 Dispersant also has some limitations that need to be considered before using it in certain applications and end uses.
Applications
Orotan 1288 Dispersant is suitable for the following applications and end uses:
Flat primers: Orotan 1288 Dispersant can improve the hiding power and adhesion of flat primers for various substrates, such as wood, metal, concrete, or plaster.
Low VOC paints: Orotan 1288 Dispersant can reduce the water and dispersant content of low VOC paints, resulting in lower VOC emissions and higher solids content.
Interior and exterior flat and semi-gloss paints: Orotan 1288 Dispersant can enhance the color development and durability of interior and exterior flat and semi-gloss paints for various surfaces, such as walls, ceilings, doors, or windows.
Limitations
Orotan 1288 Dispersant is not recommended for the following applications and end uses:
High gloss paints: Orotan 1288 Dispersant may reduce the gloss potential of high gloss paints due to its high molecular weight and hydrophilicity.
Solvent-based paints: Orotan 1288 Dispersant is not compatible with solvent-based paints due to its water solubility and polarity.
Epoxy coatings: Orotan 1288 Dispersant may interfere with the curing reaction of epoxy coatings due to its carboxylic acid groups.
Conclusion
Orotan 1288 Dispersant is a highly-effective polycarboxylic acid dispersant supplied by Dow for waterborne paint formulations. It offers a wide range of performance and formulation benefits, such as low mill-base viscosity, low foaming, excellent heat-age and shelf stability, low odor, cost effectiveness, and versatility. It can be used in various types of waterborne paint formulations, such as flat primers, low VOC paints, interior and exterior flat and semi-gloss paints. However, it also has some limitations that need to be considered before using it in certain applications and end uses, such as high gloss paints, solvent-based paints, epoxy coatings. If you are interested in learning more about Orotan 1288 Dispersant or obtaining a sample of it, please contact Dow for more information.
FAQs
Here are some frequently asked questions about Orotan 1288 Dispersant:
Q1: What is the difference between Orotan Okay, I will continue writing the FAQs based on the search results I obtained. Here is the rest of the article: Q1: What is the difference between Orotan 1288 Dispersant and Orotan 2011 Dispersant?
A1: Orotan 1288 Dispersant and Orotan 2011 Dispersant are both dispersants supplied by Dow for waterborne paint formulations. However, they have some differences in their chemical composition, properties, and applications. Orotan 1288 Dispersant is a sodium salt of polyacid, while Orotan 2011 Dispersant is a hydrophobic copolymer dispersant. Orotan 1288 Dispersant is more suitable for flat to semi-gloss paints and other coating formulations, while Orotan 2011 Dispersant is more suitable for semi-gloss and gloss paints. Orotan 1288 Dispersant is more efficient in dispersing mineral slurries, while Orotan 2011 Dispersant offers better TiO2 stabilization. Orotan 1288 Dispersant is neutralized with sodium hydroxide, while Orotan 2011 Dispersant is neutralized with potassium hydroxide.
Q2: How can I obtain a technical data sheet (TDS) or a material safety data sheet (MSDS) for Orotan 1288 Dispersant?
A2: You can obtain a TDS or a MSDS for Orotan 1288 Dispersant by visiting the Dow website and searching for the product name. You can also contact Dow for more information and request a TDS or a MSDS by email or phone.
Q3: How can I store and dispose of Orotan 1288 Dispersant safely and legally?
A3: You can store and dispose of Orotan 1288 Dispersant safely and legally by following the instructions and precautions given in the MSDS. You should store the product in tightly closed original containers at temperatures recommended on the product label. You should dispose of the product in accordance with all local or national regulations. You should not reuse empty containers as they may contain hazardous residues. You should contact Dow or your local authorities for more guidance on storage and disposal.
Q4: How can I register Orotan 1288 Dispersant in my country or region?
A4: You can register Orotan 1288 Dispersant in your country or region by complying with the chemical registration laws and regulations applicable in your area. Many countries within EMEAI 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. You should contact Dow or your local authorities for more information on chemical registration.
Q5: How can I contact Dow for technical support or customer service?
A5: You can contact Dow for technical support or customer service by visiting the Dow website and filling out a contact form. You can also call or email Dow using the contact details provided on the website. Dow has a team of experts and representatives who can assist you with any questions or issues you may have regarding Orotan 1288 Dispersant or any other Dow products. 71b2f0854b