Dibenzoate plasticizers/coalescent blends for low VOC coatings

摘要

A novel, low volatility, non-phthalate plasticizer/coalescent blend for use in paints and other polymeric coatings comprises a triblend of diethylene glycol dibenzoate, dipropylene glycol dibenzoate, and 1,2-propylene glycol dibenzoate. The triblend when used in a paint or other coatings achieves a low VOC paint or coating having stable viscosity after three freeze/thaw cycles and equivalent or superior wet edge/open time ratings, gloss ratings, scrub resistance and block resistance when compared to traditional coalescents, including without limitation high VOC coalescents, low VOC non-dibenzoate coalescents and other dibenzoate blends. The triblend may be used as a substitute or alternative coalescent in latex and acrylic emulsion coatings, among others, to achieve a lower VOC content without sacrificing performance properties.

主权项

1. A low VOC coalescent triblend additive for use in a polymeric coating composition, consisting essentially of:
a. diethylene glycol dibenzoate present in amounts of at least about 60 wt. %, b. dipropylene glycol dibenzoate present in amounts of at least about 15 wt. %, and c. 1,2-propylene glycol dibenzoate present in amounts of at least about 20 wt. %,based upon the total weight of the triblend composition.