PVM/MA ester polymers provide long term hold plus benefits of shine, thermal styling, moveability and brushability
to meet the dynamic demands of professional stylists and consumers' styling needs.
n-Butanol, as a solvent, improves the brushability
of paints and coats by reducing viscosity and prevents cobwebbing and blushing.
The Stormer instrument (see ASTM D562) often used to test architectural and maintenance paints operates at a low shear rate of about 60 [s.sup.-1], which works well to test stirrability, but not sprayability or brushability
. A conventional spindle-type rotational viscometer does not give shear rates much above 100 [s.sup.-1], so it is not of use either.
When used as a solvent in paint, it improves the paint brushability
, wet-edge and flow by slowing down the over-all evaporation (Potter and Simmons, 1998).
A unique product which promises to revolutionize the mass market for paints in India, ICI Magik is an acrylic paint, which offers consumers benefits in the economy category with its smooth finish, exhaustive shade range offering a palette of 1,500 distinctive shades and enhanced brushability
. Also a first for its category, ICI Magik has low VOC and low odor content.
Market Satisfaction Gap Hiding Power 37% Brushmark Leveling 13% Window Sticking 12% Crayon Removal 36% Brushability
19% Scrub Resistance 30% Fading Resistance 10% Stain Resistance 14% Sprayability 16% Factory Mix Time 6% Note: Table made from bar graph.
Acrylic dispersions suffer from a too fast sintering of the particles, after which brushability
is no longer possible.
In the coating industry, the density of the paint binder has a profound influence on factors such as pigment dispersion, brushability
of paint, flow, leveling and sagging (Lowel, 1990).
Latex paints dry quickly and may show brush strokes more, but additives like Floetrol (The Flood Co., 800-321-3444) improve "brushability
For coating products used on drug tablets, for example, rheometers can verify storage stability, brushability
, and film formation.
A good scheme for evaluating architectural coatings is found in ASTM D7394, "Standard Practice for Rheological Characterization of Architectural Coatings Using Three Rotational Bench Viscometers." One of the three instruments is a high speed cone/plate viscometer (as described in D4287, "High-Shear Viscosity Using a Cone/Plate Viscometer") that provides useful data related to brushability