Typical Formulation Ingredients
Phase
Ingredient
Parts by weight
A
Hydroxyl ethyl cellulose (Cellosize ER-15M, Dow Chemical)
A
Surfactant (Triton X-405, Dow Chemical)
A
Dispersing agent, (COADIS 173, Coatex)
A
Biocide (Kathon LX 1.5%, Dow Chemical)
A
Acrylic latex (Encor 167S, Arkema)
A
Calcium carbonate, 6 microns
A
Titanium dioxide (Ti-Pure R-902, Chemours)
A
Organosilane (Silquest A187, Momentive)
A
Ammonium hydroxide, 28%
A
Biocide (Polyphase 663, Troy)
Resulting Properties
A broad product line with a wide range of properties can be developed by only varying the pigment-to-binder ratio. Typical formulations for flexible acrylic latex sealants are given above. They provide a high solids, rapid drying, paintable, and low cost formulation for gap filling applications. The binder’s low glass transition temperature allows for the formulation of sealants with outstanding low temperature flexibility without the need for external plasticizers. The elimination of external plasticizer has the added benefit of improved dirt pick-up and mildew resistance.
Source: Miner, R., “Flexible Formulation”, Adhesives and Sealants Industry, July 2017, pp. 19-21.