E.i. Dupont De Nemours and Company

Albert L Lore

Stuart Raynolds

Edward James Greenwood

Nandakumar S Rao

Oil- and water-repellent solid fluoropolymers are disclosed, comprising by weight:

Oil- and water-repellent copolymers

Mixtures of (1) a polymer of at least one polyfluoroalkyl acrylate or methacrylate and (2) a copolymer of (a) at least one polyfluoroalkyl acrylate or methacrylate, (b) at least one 3-chloro- (or 3-bromo-) 2-hydroxypropyl acrylate or methacrylate, (c) at least one alkyl acrylate or methacrylate and (d) at least one polyoxyethylene acrylate or methacrylate. Mixtures are prepared by first polymerizing (1) and then (2) (a)-(d). Mixtures are useful as oil- and water-repellents, particularly for rainwear.

Fluorine-containing polymer compositions and their preparation

Terpolymers comprising (i) from 55 to 80 percent by weight of units derived from a perfluoroaliphatic acrylate or methacrylate monomer, (ii) from 15 to 35 percent by weight of units derived from a nonfluorinated polyethylene oxide acrylate or methacrylate monomer, and (iii) from 1 to 15 percent by weight of units derived from a nonfluorinated dialkylaminoethyl acrylate or methacrylate monomer in its free base, amine salt, quaternary ammonium, or amine oxide form. The terpolymers are useful in oil and water repellency applications.

Fluorine-containing terpolymers

When added thereto, certain cationic alkylammonium surfactant compounds, e.g., C.sub.12 H.sub.25 N(CH.sub.3).sub.3 Cl, enhance the leveling activity of known fluorophosphate leveling agents, e.g., ##STR1## where (CF.sub.2).sub.n represents a mixture of groups with C.sub.4 -C.sub.14 carbons, in floor polishes.

Growing community of inventors

Wilmington, DE, United States of America

Albert L Lore