Reduce Surface Tension
With today's trend in water-based low-VOC coatings, surface tension reduction
is critical for application and good film formation, as high surface tension may
cause film defects (craters, fish eyes, pin holes, orange peel, and poor
thin film control).
Capstone® fluorosurfactants provide multifunctional performance
above and beyond existing hydrocarbon and silicone based surfactants. They show
unique properties in reducing surface tension and in solving these surface defects.
Combined with their traditional role as wetting agents, using Capstone®
fluorosurfactants in your paint formulation leads to Improved Film Quality
and allows you to achieve:
- better wetting (improved intercoat adhesion, and the ability to wet out low energy surfaces)
- better leveling (improved gloss, and reduced "orange peel", or decreased incidence of Benard cells)
- better antiblocking (the tendency of glossy paints to stick to themselves)
- less cratering (an effect due to the presence of surface imperfections or contaminants)
- open-time extension for low-VOC paints
Capstone® fluorosurfactants work very well with different
sheen levels of latex paints, even with deep-based paints.
With $0.02 of Capstone® fluorosurfactant
alone, surface tension was reduced below 20 dynes/cm.
The above chart shows surface tension reduction in DI water of hydrocarbon surfactants
alone and mixtures of hydrocarbon surfactants with Capstone®
fluorosurfactant at an equal cost basis. This experiment was run with two hydrocarbon
surfactants and one fluorosurfactant. At $0.02 per pound cost of surfactants, the
hydrocarbon surfactants alone were less effective than using $0.01of hydrocarbon
surfactant and $0.01of Capstone® fluorosurfactant.
Recommended Capstone® grades are available in the product selection page.