General agent of French Arkema company in China, Arkema CVP, rheological additive Crayvallac CVP, micro powder castor oil derivative, used as anti settling and thixotropic agent overview:
arkema CRAYVALLAC ANTISILTE CVP is a micronized rheological additive derived from hydrogenated castor oil, applied in aliphatic solvent based coatings.arkema The main characteristics of CVP are:
100% active ingredient
Endowing the system with shear thinning rheological properties, and its viscosity gradually recovers over time
• Excellent anti sagging performance
• Excellent anti sinking performance
• Excellent recoating ability
arkema CRAYVALLAC ANTISETLLE complies with FDA 175.300 requirements, but this statement does not indicate full recognition. The customer needs to refer to the FDA 175.300 regulatory requirements, including extraction limits and restrictions on the use of the product.
Recommended dosage of Akoma Crayvallac CVP micro powder rheological additive castor oil derivative:Anti sinking and anti current hanging: 0.2-1.5%
| Product Code | type | Addition amount (wt%) |
| crayvallac cvp | Castor oil derivatives | 0.2-1.5 |
| Product specifications |
| Other properties |
| Particle size distribution (Malven Mastersizer)Laser Particle Size Distribution Analyzer (CR 005) | Specific gravity (25 ℃, g/cm3),
(CR 006) | one point zero one |
DV.2 min
DV.8 max | 4µm
20µm | Bulk density, g/cm3, (CR 016) | 0.4-0.6 |
|
| appearance | White powder |
Akoma Crayvallac CVP, a micro powder rheological additive, is a simple method for adding castor oil derivatives
● Disperse at high speed together with the base material
● Dispersion temperature: 30-55 ℃ in aliphatic hydrocarbon solvents
Akoma Crayvallac CVP micro powder rheological additive castor oil derivative detailed addition method and steps:
arkema CRAYVALLAC ANTISILTE CVP is best added together with pigments and fillers during the grinding stage, dispersed using a high-speed disperser, and controlled at a temperature below 55 ℃. In order to achieve the optimal effect of CRAYVALLAC ANTISETLLE CVP, high-speed dispersion is still required for 20-40 minutes after reaching the activation temperature of 30-55 ℃.
The high-speed disperser is the most ideal dispersing device because it can provide the shear force and temperature required to activate CRAYVALLAC ANTISELLTE CVP, thereby fully activating CRAYVALLAC ANTISELLTE CVP. The activation process is a process that involves arkema The process of ANTISILTE CVP transforming from a powder state to 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.
When the activation temperature is too low（<30 ℃), or too high（>55 ℃), or insufficient activation time, will result in poor formation of the interacting network structure. Excessive activation temperature will cause the dissolution of the network structure.
Partially dissolved arkema ANTISELLTE CVP will thicken during the cooling process. It is the result of the uncontrolled recrystallization and precipitation of dissolved CRAYVALLAC ANTISELLTE CVP.
Like all systems that use hydrogenated castor oil derivatives as rheological agents, the use of arkema The CVP system sometimes forms a pseudo thickening phenomenon. If the system is not stirred during the cooling process, false thickening will occur. This phenomenon can be avoided by slowly stirring the system to below 30 ℃ during the cooling process before packaging. Of course, false thickness is a temporary phenomenon that can be eliminated during construction through high shear forces.
Due to the potential occurrence of false consistency, it is necessary to ensure that the sample is not affected by false consistency during the detection process. Mechanical stirring of the sample for a few minutes before testing can eliminate the phenomenon of false thickening.
In addition to solvent based coating systems, arkema CRAYVALLAC ANTISILTE CVP has also been successfully applied in other industries such as ink, glue, paste, putty, sealant, potting, grease, and lubricants.
Given the different formulation systems, production processes, and application areas, we strongly recommend conducting a comprehensive evaluation when using CRAYVALLAC ANTISELLTE CVP to ensure it meets the requirements. In addition, when coating construction is carried out under poor ventilation conditions, or when the substrate temperature is too high, or during hot spraying, additional attention may be required.
Akoma Crayvallac CVP Micro powder Rheological Additive Castor Oil Derivatives Storage Requirements:
arkema CRAYVALLAC ANTISILTE CVP 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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