Redispersible polymer powder from polyolefin dispersions and the use thereof in construction applications
AssigneeDow Global Technologies LLC
InventorsRobert Baumann, Sandra D. Hofmann, Hartmut Kuehn, Margarita Perello
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Abstract
The present invention provides compositions comprising redispersible polymer powders of polyolefins with carboxyl group containing dispersant polymers and vinyl ester copolymers which may further comprise hydraulic or water curable inorganic cements for various construction applications, such as cement tile adhesives. Methods of making redispersible polymer powders of polyolefins are also provided, including forming an aqueous polyolefin dispersion, such as, for example, by mechanical dispersion, followed by drying to form the redispersible polymer powders.
Claims10
A composition comprising redispersible polymer powder particles having one or more polyolefin, from 5 to 50 wt. % of one or more carboxyl group containing dispersant polymer, based on the total amount of polyolefin and dispersant polymer solids, and one or more vinyl ester copolymer in a weight ratio of polyolefin to vinyl ester copolymer of from 10:90 to 90:10.
A method for making redispersible polymer powder particles comprising:
- forming an aqueous polyolefin dispersion containing a polyolefin and a carboxyl group containing dispersant polymer,
- blending the aqueous polyolefin dispersion with a vinyl ester copolymer to form an aqueous polymer dispersion,
- and drying the resulting aqueous polymer dispersion to form a redispersible polymer powder.
Dependencies are inferred from the claim text.