E.i. Dupont De Nemours and Company

Robert A Halling

Hsu-Nan Huang

Patrick Henry Corcoran

Gary Delmar Jaycox

Josef Huybrechts

Charles Francis Palmer, Jr

Carl Brent Douglas

Marko Strukelj

Eric Diaz Felton

Davis E Lee

This invention concerns low viscosity aldimine and ketimine reactive diluents having multi-imine functionality, which are useful in automotive refinish coating compositions, including a process for making them and the coatings that contain them.

Low viscosity imine reactive diluents and coating compositions made therefrom

The present invention relates to the preparation of fluoroalkylalkoxylates in which one reacts at least one fluorinated alcohol with at least one alkylene epoxide in the presence of a novel catalyst system comprising an iodine source and an alkali metal borohydride.

Process for the alkoxylation of fluorinated alcohols

Mixture of the compounds: F(CF.sub.2).sub.m --(CH.sub.2).sub.n --(OCH.sub.2 CH.sub.2)p--OH wherein m=2 and about 20, but in at least 5 weight % of molecules m is 8 or higher or mixtures of the same, but in no more than 5 weight % of the molecules is m equal to 14 or higher or mixtures of the same; n=1 to 3; & p=1 to 40, but the mixture has an average p=8 to 17.

Fluoroalkylethoxylate compositions having enhanced water solubility

Novel and highly reactive hydrolyzed silane emulsions are achieved by emulsifying a hydrolyzable alkoxysilane (e.g., or the like) in water in the presence of an effective amount of an emulsifier of sufficiently high HLB value (preferably 14 or greater) to simultaneously retain said hydrolyzable alkoxysilane compound in a substantially totally hydrolyzed state and inhibit said resulting hydrolyzed alkoxysilane compound from self-condensation. Such reactive emulsions containing hydrocarbon silanes are useful to produce durable coatings that impart water repellency and lubricity to substrates having siliceous, cellulosic or proteinaceous surfaces.

Hydrolyzed silane emulsions and their use as surface coatings

Novel and highly reactive hydrolyzed silane emulsions are achieved by emulsifying a hydrolyzable alkoxysilane (e.g., perfluoroalkylethyltris(2-(2-methoxyethoxy)ethoxy)silane, 2-perfluoroalkylethyltris(2-(2-(2-methoxyethoxy)ethoxy)ethoxy) silane, 2-Perfluoroalkylethyltris(polyoxyethyleneglycolmonomethylether)silane or the like) in water in the presence of an effective amount of an emulsifier of sufficiently high HLB value (preferably 14 or greater) to simultaneously retain said hydrolyzable alkoxysilane compound in a substantially totally hydrolyzed state and inhibit said resulting hydrolyzed alkoxysilane compound from self-condensation. Such reactive emulsions containing fluorocarbon silanes are useful to produce durable coatings that impart oil and water repellency to substrates having siliceous, cellulosic or proteinaceous surfaces.

Novel polymeric fluorocarbon siloxane represented by the formula: ##STR1## and corresponding polymeric branched structures wherein R.sub.a is a perfluoroalkyl radical, R.sub.b is an aminoalkyl or substituted aminoalkyl radical and R.sub.c hydrocarbyl, substituted hydrocarbyl phenyl, substituted phenyl or cyanoalkyl radical are shown to form stable aqueous emulsions without the use of volatile organic solvents and by a low energy processing. These emulsion are found to be highly hydrolyzed in solution without leading to precipitation via intermolecular condensation The emulsions when applied to substrates impart both oil and water repellent properties as well as improved lubricity.

Polymeric fluorocarbon siloxanes, emulsions and surface coatings thereof

Modified hydrophilic polyesters

Permselective membranes comprising hydrazide-containing aromatic polymers complexed with selected metals that form square planar coordination complexes therewith; the membranes being prepared by reacting the polymer with a salt solution of the selected metal so that the metal is incorporated into the resulting membranes; the membranes being useful, among other things, for the reverse osmosis separation of a salt solute from an aqueous solvent.

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Wilmington, DE, United States of America

Robert A Halling