The Universal Selection Source: Coatings Ingredients

Coatex
Thanks to its robust range of thickeners and dispersing agents, Coatex provides technical solutions to recurrent formulators issues (color acceptance, storage stability, water resistance...) for waterborne wall paint, wood coating and specialty coating formulations.

Paint Texture Design

KU builder

Users' first action upon opening a can of paint is generally to re-homogenise the paint to evaluate its consistency. In this regard, a good formulation should ensure a positive impression of smoothness. This impression may be correlated with a rheological measurement conducted at a medium velocity gradient, i.e. approximately 100 s-1. For each type of paint, there is a range of preferential values related to this viscosity called "Stormer viscosity" or "KU viscosity".

Some thickeners can prove more effective than others in increasing these viscosity values to 100 s-1. Rheology modifiers imparting this behaviour themselves feature a sufficiently high rheology profile at 100 s-1.

Rheological Behaviour of Acrylic Thickeners Rheotech X800 series
Figure 1: Rheological Behaviour of Acrylic Thickeners Rheotech™ X800 series
Rheotech™ 2800 and Rheotech™ 3800 are recommended to obtain excellent appearence and creaminess:
  • Rheotech™ 2800 for semi-gloss or one coat matt paints
  • Rheotech™ 3800 for matt or semi-matt paints
  • Rheotech™ 4800 for matt paints or fillers

See the different rheological behaviors of wood stain formulations containing 3 different Coatex thickeners
(Thixol™ 53 L, Viscoatex™ 730 and Rheotech™ 4800)




Color acceptance / Tinting system

Architectural and decorative paints with deep and vibrant colors are becoming a growing market to be addressed. Very good color acceptance upon tinting should therefore not be overlooked. In some cases, lack of stability after color addition may occur thus leading to in can pigment separation or flooding issues often revealed by a rub out test.

Architectural and decorative paints with deep and vibrant colors with Rheotech
No color float with Rheotech™


The use of universal colorant in tinting paints can also lead to important drops in viscosity, particularly when the paint is tinted to a deep tone.

In given cases, the interaction between the associative rheology modifiers and the binder can be disrupted resulting in a weaker thickening network.

The viscosity can be dramatically reduced affecting the application properties: poor sag resistance, hiding power and brush load.
Formulators are then driven towards more demanding rheology modifiers offering optimized behaviour after tinting.

The paint, based on Rheotech™ 4800 exhibits less viscosity drop than that of traditional acrylic rheology modifiers.

The paint, based on Rheotech 4800 exhibits less viscosity drop than that of traditional acrylic rheology modifiers
Figure 2: % viscosity drop after tinting of 5% black pigment T24h – Matt paint (PVC: 82%, styrene acrylic)


Viscosity drop upon tinting as well as color float can then be easily addressed with the associative acrylic rheology modifiers from the Rheotech™ range.

Rheotech™ thickener range can ensure improved behavior after tinting comparatively to that of standard acrylic thickeners or HEC thickeners. VOC water-based tinting coatings can benefit from the Rheotech™ thickeners offering excellent color acceptance performances even in the presence of high levels of deep colorants.

Contact our expert!

And get personalized advice

Submit request

28

Product Selection

Products and Documents
Description
Download
Access this presentation featuring Coadis™ 123 K, a hydrophobic dispersing agent which can help formulators to improve the surface of the film and increase water repellency.
Dispersant
Polyurethane Thickener
Dispersant
Dispersant
Thickener
Thickener
Acrylic associative Thickener
Acrylic associative Thickener
Acrylic associative Thickener
Acrylic associative Thickener
Dispersant
Dispersant
Polyurethane Thickener
Polyurethane Thickener
Polyurethane Thickener
Polyurethane Thickener
Polyurethane Thickener
Polyurethane Thickener
Dispersant
Dispersant
Access this Case Study featuring Coadis™ 144 A, a pigment dispersant designed for a wide variety of rutile TiO2. It provides outstanding performance to a broad spectrum of waterborne exterior and interior coatings.
Read this Case Study featuring Rheotech 3800™, and acrylic associative thickener, which enables to make cost savings by using less thickener while matching the perfect rheological balance in waterborne matt & semi-gloss paints.
Read this Case study to learn more about Coadis™ BR 85 and Coapur™ XS 22 designed to address the recurrent challenge (high gloss, good stability...) of Alkyd emulsion based formulations.
Access this Case Study and learn more about Rheotech™ 4800, an acrylic associative thickener providing excellent leveling properties and improved color acceptance to water-based flat & matt paints.
Access this Case Study featuring Rheotech™ 2800, a VOC-free and APEO-free associative thickener which enables to avoid color float, increase tinting strength and limit viscosity drop.
Read this Case Study featuring Coapur 975 W and discover how it can help you develop low emission paints that offer optimal application properties and excellent color acceptance.
Access this presentation introducing the Bumper technology™, a dispersing technology which enables Coating formulators to achieve effective TIO2 reduction. It can be used with various binders and for any kind of paint (from matt to gloss).
28 items matching your search
8

Case Studies from Rheology Modifiers Solutions Center

Improve coating durability and application flexibility for water-based formulations

Are long lasting, high-performance coatings critical to your business? While minimizing maintenance work and end-user cost, they also ease the workload by providing application flexibility.
To meet these two objectives, you have one effective solution: improve water resistance!

Download this Case Study and discover a combination of two rheology additives that can enhance water resistance of your water-based formulations.

Download

Develop ecofriendly water-based paints with excellent color acceptance and optimal application properties

Coapur™ 975 W is a zero-VOC & APEO-free thickener which, used in combination with Ecodis™ P50, enables the formulation of eco-friendly water-based paints. These rheological additives can help you develop low emission paints that offer optimal application properties and excellent color acceptance.

Download

Get effective TiO2 dispersion for your whole Coatings range thanks to a unique dispersant, Coadis™ 144 A

Coadis™ 144 A is a pigment dispersant specifically designed for a wide variety of rutile TiO2. It provides outstanding performance to a broad spectrum of waterborne exterior and interior coating formulations. 

Coadis™ 144 A enables maximized gloss potential, while providing ideal viscosity, flow and wet adhesion across a wide range of sheens (from flat to high gloss).

Download

Highly efficient Rheology Modifier for improved Storage Stability and better Color Acceptance

Based on a proprietary technology, Rheotech™ 2800, a Coatex VOC-free and APEO-free associative thickener enables to avoid color float, increase tinting strength and limit viscosity drop. Rheotech™ 2800 allows paint formulators to improve storage stability and make cost saving in using two times less product compared to a standard thickener.


Download

Address the recurrent challenge (high gloss, good stability...) of Alkyd emulsion based formulations with COADIS™ BR 85

Coatex has designed Coadis™ BR 85 and Coapur™ XS 22 solutions to address the recurrent challenge (high gloss, good stability...) of Alkyd emulsion based formulations.

Coadis™ BR 85 and Coapur™ XS 22 are the best candidates to formulate high gloss topcoat with excellent stability.

Download

10

Downloads from Rheology Modifiers Solutions Center

21
8

Webinars & Videos

Check out our webinars and videos about Rheology Modifiers Solutions

Back to Top