Alliedsignal Inc.

Other

Mathias P Koljack

Lidia T Calcaterra

George David Green

Dale A Hangey

William B Bedwell

Michael G Koehler

Qamardin Farishta

Raymond John Swedo

Romulus Gaita

Darryl K Barnes

Eugene V Sitzmann

Russell F Anderson

Charles Wu

Julietta G Cruz

Stephen Frederick Yates

Chandra M Srivastava

A process for the purification of nucleosides, and more particularly to a selective solvent extraction method for purifying protected nucleosides. In the purification process, solid particles of protected nucleosides are selectively washed to remove undesirable polar and/or non-polar impurities, while leaving the solid particles substantially undissolved.

Selective solvent extraction for the purification of protected nucleosides

The present invention relates to polymer precursors used in sterolithography. Specifically, the invention provides a novel resin having a glass transition temperature (Tg) that is substantially higher than any existing resins. The polymer precursors comprise an admixture of at least one vinyl ether, functionalized compound and at least one epoxy functionalized compound, at least one acrylate functionalized compound, and a photoinitiator, wherein the polymer precursor composition cures by a dual cure mechanism utilizing a free radical pathway as well as a cationic pathway thus yielding improved green strength.

High temperature performance polymers for stereolithography

The present invention provides methods and compositions to impart coffee stain resistance to polyamide textile substrates such as carpets. The compositions comprise either (i) a copolymer selected from the group consisting of a hydrolyzed aromatic-containing vinyl ether maleic anhydride copolymer, a half ester of an aromatic-containing vinyl ether maleic anhydride copolymer, and mixtures thereof, or (ii) an aromatic-containing acrylate copolymerized with an acid selected from the group consisting of acrylic acid and maleic acid. The coffee stain-resistant polyamide textile substrates made are also part of the invention.

Method to impart coffee stain resistance to polyamide textile substrates

Method to impart coffee stain resistant to polyamide textile substances

A method of imparting acid dye stain resistance to polyamide substrates having improved durability of the stain resistance to detergent washings comprising treating the polyamide substrate with an effective amount of a mixture of phenyl vinyl ether/maleic diacid copolymer and 2-(4-hydroxymethyl-phenoxy)-ethyl vinyl ether/maleic diacid copolymer, wherein the phenyl vinyl ether/maleic diacid copolymer is the stain resist agent, and the 2-(4-hydroxymethyl-phenoxy)-ethyl vinyl ether/maleic diacid copolymer is added to improve the durability of the stain resist agent.

Method and composition to enhance acid dye stain resistance of

The stain resistance of nylon fibers is improved by attaching stainblocking compounds to the fiber surface using agents which have been grafted to the nylon using UV light and a photoactivator.

Activation of nylon fibers for modification by UV radiation

An enhancement of the bulk and hand of carpeting and carpet fiber is made by treating with a terpolymer, particularly the terpolymer of (a) phenyl vinyl ether, (b) 2-(4-hydroxymethyl-phenoxy)ethyl vinyl ether, and (c) maleic anhydride.

Method of coating for enhancement of bulk and hand in carpets

A method to impart coffee stain resistance to polyamide fibers such as those found in textile substrates (e.g., carpets). The method includes preparing an aqueous dispersion of charged microfine beads of either (i) a copolymer selected from the group consisting of a hydrolyzed aromatic-containing vinyl ether maleic anhydride copolymer, a half ester of an aromatic-containing vinyl ether maleic anhydride copolymer, and mixtures thereof, or (ii) an aromatic-containing acrylate copolymerized with an acid selected from the group consisting of acrylic acid and maleic acid, immersing the polyamide fiber in the aqueous dispersion so that the beads contact and coat the fiber via an electrostatic attraction. The aqueous dispersion is prepared by dissolving the polymer into a water-soluble solvent to form a solution, injecting the solution into water, and evaporating the solvent.

Method to impart coffee stain resistance to polyamide fibers

The present invention provides methods and compositions to impart coffee stain resistance to polyamide textile substrate such as carpets. The compositions comprise either (i) a copolymer selected from the group consisting of a hydrolyzed aromatic-containing vinyl ether maleic anhydride copolymer, a half ester of an aromatic-containing vinyl ether maleic anhydride copolymer, and mixtures thereof, or (ii) an aromatic-containing acrylate copolymerized with an acid selected from the group consisting of acrylic acid and maleic acid. The coffee stain-resistant polyamide textile substrates made are also part of the invention.

Growing community of inventors

Arlington Heights, IL, United States of America

Mathias P Koljack