General agent of Arkema in China, Arkema SL, rheological additive Crayvallac SL, micro powder polyamide wax, used as anti settling thixotropic agent Overview:
Arkema CRAYVALLAC SL is a high-performance micronized polyamide rheology additive developed for moisture cured MS sealants produced at high temperatures. arkema The main features of SL are:
100% active ingredient
Can be effectively activated at 90-115 ℃
Reduce production cycle
Endowing the system with shear thinning rheological properties
Very good extrusion performance
Excellent anti sagging and anti collapse performance
Small impact on modulus
Excellent storage stability
Arkema CRAYVALLAC SLX Moisture cured MS adhesive also suitable for high-temperature production.
arkema CRAYVALLAC SLRecommended usage amount of micro powder polyamide wax rheology additive:For single component moisture cured MS sealant, excellent collapse and sagging control performance can be achieved based on 1-5% of the total formula dosage.
| Product Code | type | Addition amount (wt%) |
| crayvallac sl | Polyamide wax | 2. 0-5. 0 |
| Product specifications | Other properties |
Particle size distribution (Malven Mastersizer)
Laser Particle Size Distribution Analyzer (CR 005) | Specific gravity (25 ℃, g/cm3),
(CR 006) | zero point nine nine |
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 |
arkema CRAYVALLAC SLSummary of methods for micro powder polyamide wax rheological additives:
Add high-speed dispersion together with pigment fillers, with an activation temperature of 90-110 ° C
arkema CRAYVALLAC SLDetailed method and steps for adding micro powder polyamide wax rheological additives:
Arkema CRAYVALLAC SL is a high-performance micronized polyamide rheology additive developed for high-temperature production of single component MS sealants. Compared to hydrogenated castor oil-based products and gas-phase silica, its biggest advantage is its minimal impact on modulus and good storage stability.
In the single component moisture cured MS sealant formula, Arkema SL is best added together with MS polymer and plasticizer in the initial stage to a high-speed dispersion device with a heating device, and then the pigment filler is added. Maintaining a temperature of 90-115 ℃ during the vacuum high-speed dispersion process can fully activate CRAYVALLAC SL. This process is usually maintained at 110 ℃ for about 30 minutes, or to achieve the desired dispersion effect and qualified moisture content (usually<800ppm). Next, the system is cooled to a temperature at which the desiccant, adhesion promoter, and catalyst can be safely added.
The activation process is a process of integrating Akoma The process of SL transforming from a powder state to a network structure of fibrous 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. Activation at too low a temperature or insufficient activation time will result in ineffective network structure formation and poor resistance to sagging and collapse.
The successful production of MS sealant relies heavily on the control of moisture content throughout the entire production and storage process. For this reason, all pigments and fillers are usually preheated before being added to MS polymers. Similarly, some special components with low moisture content may be used.
The vacuuming process during the heating process has two key functions: preventing the inhalation of moisture and removing residual moisture from the raw materials.
For moisture cured MS sealants, it is particularly recommended to quickly disperse all additives and not allow direct contact between additives and resin components. Extended contact may result in insoluble crusts that appear as small particles in the final sealant.
Given the different formulation systems, production processes, and application fields, we strongly recommend using CRAYVALLAC SL Conduct a comprehensive evaluation to ensure that it meets the requirements. Additionally, we do not recommendAh科玛 SLUsed in paint systems.
arkema CRAYVALLAC SLStorage requirements:
AhKoma CRAYVALLAC SL should be stored in its original packaging bag and placed in a dry and temperature controlled environment of 5-30 ℃, avoiding direct sunlight or freezing. The product is valid for four years when stored under the above conditions.
The general agent of Arkema in China, Arkema SL, rheological additive Crayvallac SL, micro powder polyamide wax, used as anti settling and thixotropic agent. The main application areas are:
● Specially suitable for high-temperature production, single component moisture cured sealants and adhesives such as MS, SPUR, STPE, etc., with excellent shear thinning rheological properties.
● Excellent anti sagging, anti collapse, and storage stability performance
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