Overview of Arkema Crayvallac Super, Micro Powder Polyamide Wax Rheological Additive:
Arkema CRAYVALLAC SUPERIt is a high-performance micronized polyamide rheological additive applied in solvent based, high solid content, and solvent-free systems. The main features of CRAYVALLAC SUPER are:
100% active ingredient
Endow the system with shear thinning rheological properties, and its viscosity gradually recovers over time
Excellent anti sagging performance
Very good anti sinking performance
Excellent storage stability
arkema SUPEROvercoming some drawbacks of hydrogenated castor oil derivatives as rheological agents, such as back thickening and false thickening. Therefore, using the Arkema CRAYVALLAC SUPERThe formula system has demonstrated superior performance.
Arkema Crayvallac Super, a micro powder polyamide wax rheology additive. Recommended usage: anti settling and anti sagging: 0.5-1.5%
| Product Code | type | Addition amount (wt%) |
| crayvallac super | Polyamide wax | 0.5-2.0 |
| Product specifications | Other properties |
Particle size distribution (Malven Mastersizer)
Laser Particle Size Distribution Analyzer (CR 005) | Specific gravity (25 ℃, g/cm3), (CR006) | zero point nine eight |
DV.1 min
DV.9 max | 1.8µm
15.0µm | Bulk density, g/cm3,
(CR 016) | 0.4-0.6 |
| Capillary melting point determination (CR 003) | 120-130℃ | appearance | Grey white powder |
Summary of the method for adding micro powder polyamide wax rheology additive, Crayvallac Super:
● Disperse at high speed together with the base material, dispersion temperature:>50 ℃ in aliphatic hydrocarbon solvents,>40 ℃ in aromatic hydrocarbon solvents, esters, ketones, alcohols or mixed strong solvents
Arkema Crayvallac Super, a micro powder polyamide wax rheological additive. Detailed addition method and steps:
Arkema CRAYVALLAC SUPERIt is best to add it to a high-speed disperser and use it for activation. Usually added together with resin during the grinding and filling stage. According to the characteristics of different coating systems, maintaining a temperature of 50-60 ℃ during high-speed dispersion can ensure the full activation of CRAYVALLAC SUPER. After reaching the activation temperature, high-speed dispersion is still required for 15-30 minutes.
The high-speed disperser is the most ideal dispersing equipment because it can provide activated ArkemaThe shear force and temperature required for SUPER to fully activate CRAYVALLAC SUPER. The activation process is a process of transforming CRAYVALLAC SUPER from a powder state into a fibrous network structure with interactions. It is precisely this network structure that ultimately endows the system with shear thinning properties. This shear thinning characteristic provides the ability to maintain high viscosity under low shear conditions, thereby achieving excellent anti settling performance; During construction, that is, under high shear conditions, the viscosity of the system will decrease. The ultimate result is that the system has good anti sinking properties and is easy to construct.
After the construction is completed, the system returns to a low shear state, and the network structure in the system is re formed. The viscosity of the system gradually recovers over time. The process of gradually recovering viscosity over time is called "thixotropy", which enables the system to achieve good leveling and anti sagging performance after viscosity recovery.
The following lists the different activation temperatures required for the high-speed dispersion of CRAYVALLAC SUPER in different solvent systems:
Aromatic mineral oil:55-60℃
Aliphatic hydrocarbon solvents: 50-55 ℃
Aromatic hydrocarbon solvents: 40-50 ℃
Aromatic hydrocarbon solvents/alcohol mixed solvents: 40-50 ℃
Aromatic hydrocarbon solvent/ether mixed solvent: 40-50 ℃
Aromatic hydrocarbon solvent/ester mixed solvent: 40-50 ℃
Solvent free system:55-65℃
For stronger solvent systems, such as mixed solvent systems of xylene and alcohols, ethers, or esters, we strongly recommend replacing CRAYVALLAC SUPER with CRAYVALLAC ULTRA. There will be better performance in the issues of false thickening and returning coarseness.
We strongly recommend that all additives be quickly and evenly dispersed in the moisture cured methylsiloxane terminated polyether sealant system,Do not come into contact with the resin part of the system for a long time, otherwise it may form insoluble small crusts, resulting in small particles in the finished product of the sealant.
Given the different formulation systems, production processes, and application fields, we strongly recommend using CRAYVALLAC SUPERConduct a comprehensive evaluation to ensure that it meets the requirements. In addition, when the coating is applied on poorly ventilated strips, or when the substrate temperature is too high, or during hot spraying, additional attention may be required. We strongly recommend using CRAYVALLAC ULTRA for solvent based epoxy systems that cure at room temperature.
Storage requirements for Arkema CRAYVALLAC SUPER:
The Arkema CRAYVALLAC SUPER should be stored in its original packaging bag, placed in a dry and temperature range of 5-30 ℃, and protected from direct sunlight or freezing. The product is valid for four years when stored under the above conditions.
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