CRAYVALLAC® SLW

​Formulation

• Easy handling

• Ready to use

Storage:

• Antisettling

• In-can appearance

• Syneresis resistance

Application:

• Gunnability

• Slump resistance

• Temperature resistance

APEO free: Yes

Bacteria resistance: Yes

Bio content (%): 69

Heavy metal free: Yes

Solvent-free: Yes

• CRAYVALLAC® SLW is specially designed for manufacture of one-component Silyl- Terminated-Polymer systems where processing temperatures typically lie within the range 55 - 90°C (130 - 194°F).
• With moisture curing Silyl-Terminated-Polymer based sealants, CRAYVALLAC® SLW is generally added along with the initial charge of Silyl-Terminated-Polymer polymer and plasticizer to a vacuum dispersion vessel either with or without heating capability.
• This is then followed by the pigments and extenders. Efficient activation of CRAYVALLAC® SLW is achieved during the vacuum dispersion stage by allowing the batch temperature to rise to 55 - 90°C (130 - 194°F) for approximately 30 minutes or until the required level of dispersion is obtained and a suitable low moisture content has been achieved (typically lower than 800 ppm.).
• Following this, the batch temperature is lowered sufficiently to allow for the safe addition of additives such as moisture scavengers, adhesion promoters and reaction catalysts.
• The activation process constitutes the conversion of the CRAYVALLAC® SLW particles to an interacting network of crystalline fibers.
• It is this network that gives rise to the shear thinning rheology.
• This shear thinning characteristic provides for a low viscosity at the shear rates associated with application by extrusion, and a very high viscosity under the low shear rates experienced after application.
• The net result is ease of application followed by excellent sag and slump resistance.
• Activation at too low a temperature, or for too short a time, will result in the formation of an inefficient interacting network and consequently poor sag and slump resistance.

• It should be stored in the original containers in a dry place at temperatures between 5°C (41°F) and 30°C (86°F).
• Avoid exposure to direct sunlight or frost.
• In these conditions, this product should be used within 48 months from delivery.