Enhanced TDS
Identification & Functionality
- Chemical Family
- Chemical Name
- Manufactured By
- CASE Ingredients Functions
- Technologies
- Product Families
Applications & Uses
- Markets
- Applications
- Coating End Applications
Properties
- Typical Properties
Value Units Test Method / Conditions Average Particle Size 7 nm - Viscosity 5 mPa.s - Density 1.2 g/cc - pH Value 8 - - Silicon Dioxide Content 30 wt% - - Rheological Properties
It is rheological properties such as yield stress and elasticity, which differ between thickener types, that affect the efficiency of Levasil CC301 as an open time extender. In systems characterized by high yield stress and elasticity, the colloidal silica particles are hindered or slowed in their migration to the paint surface and then give a smaller extension of open time.
- Studied Paints
Open time
The type of thickener used affects the open time of a paint. The addition of silane modified colloidal silica, Levasil CC301, induces an extension of the open time for all studied thickeners but the degree of extension varies between the thickening agents. Levasil CC301and HM-PAPE thickener in combination give best results; an exten- sion of open time with up to 89%. Similar results are obtained for clear coat systems. Open time was determined according to ASTM D7488 standard.
Drying time
In addition to open time, the drying time of paint is also slightly affected by the type of thickener used. HM-PAPE and EHEC based systems are characterized by shorter drying times (2–3 min) in the presence of 10% Levasil CC301.Drying time was determined according to ASTM D5895 standard
Technical Details & Test Data
- SEM Analysis
Surface enrichment of colloidal silica on the paint surface is likely the cause of surface hardening and the modification of properties such as open time, hardness development and dirt pick-up resistance.
Paint surface
Paint surface with Levasil CC301.
