Basf Corporation

Basf Se Corporation

Steven D Gagnon

Eric J Lind

Edward Michael Dexheimer

Pauls Davis

Duane A Heyman

William W Levis, Jr

Oscar M Grace

Johannes Jacobs

Thomas A Grzanka

Robert A Doerr

Kenneth K Bordelon

Donald Charles Mente

Theodore Michael Smiecinski

Steven E Wujcik

James A Gallagher

John E Davis

Egils Grinbergs

Sandy A Bananto

Gregory T Roginski

This invention provides a method for purifying a chlorine supply that includes a chlorine component, a bromine component, and nitrogen trichloride. The method includes the steps of introducing the chlorine supply into a vaporizer, heating the chlorine supply in the vaporizer to form a vapor, and introducing the vapor into a distillation system to provide purified chlorine gas, a distillate that includes liquid chlorine and the bromine component, and a bottoms component including the nitrogen trichloride. The method also includes the steps of condensing the vapor in a reflux condenser, heating the condensate in a reboiler, removing the purified chlorine gas from the distillation system, and removing the distillate from the distillation system.

Method for purifying a chlorine supply

There is now provided a method of recycling toluenediisocyanate residue resulting from the production of toluenediisocyanate by the reaction of toluenediamine by phosgenation in the presence of a solvent. In accordance with the teachings of the present invention, the toluenediisocyanate residue is treated at reflux with an alkanolamine to obtain an intermediary product which is distilled thereby giving rise to various products including but not limited to at least one component selected from toluenediamine, oxazolidone and hydroxyethylimidiazolidone. Preferably the alkanolamine employed is a monoethanolamine.

Recovery of products from toluenediisocyanate residues

A copolymer based on vinyl acetate and polyalkylene oxide(s) containing an allyl glycidyl ether reactive double bond.

Copolymers from polyalkylene oxides containing an allyl glycidyl ether

The flame retardancy of flexible polyurethane foams is increased by incorporation into the foam forming reactants of a low molecular weight, high primary hydroxyl trifunctional polyether polyol having a hydroxyl number between 300 and 500 and a primary hydroxyl content greater than 50 percent.

Polyurethane foams of increased flame retardancy

Polyether polyols prepared by oxyalkylating a 1,2-diaminocycloalkane have reduced levels of unsaturation and may be used to prepare melamine containing flame retardant polyurethane foams capable of passing California 117 and 133, and other flame tests.

Polyether polyols having reduced unsaturation and polyurethane foams

Macromers for use in preparing stable, low viscosity graft polymer polyols of high solids content are disclosed. These macromers are easily made in high yield with short cycle times, and may be used to prepare graft dispersions containing amine based polyols.

Macromers for graft polyols and the polyols prepared therefrom

A copolymer based on vinyl acetate and an allyl glycidyl ether capped C.sub.12 -C.sub.30 aliphatic alcohol and their saponified products.

Copolymers of vinyl acetate and allyl glycidyl ether capped C.sub.12 -C.sub

A polyether polycarbonate block copolymer nonionic surface-active agent and method for making the same. The polyether polycarbonate surface active agent is comprised of a hydrophilic portion comprised of a polymer selected from the group consisting of a polyoxyalkylene polyether, a saccharide, a saccharide polyoxyalkylenate, a polycarbonate having a carbon dioxide content of from about 1 to 15 molar percent and mixtures thereof and a hydrophobic portion comprising alkylene and carbonate units arranged in alternating or random order to form a poly(alkylene carbonate) having a total carbon dioxide content of from about 25 to 50 molar percent and a total molecular weight of from about 300 to 10,000. The hydrophobic portion is bonded to the hydrophilic portion at each side of a reactive hydrogen. The surface active agent is prepared by polymerizing the hydrophilic portion with the hydrophobic portion in a weight ratio of about 10:90 to 90:10.

Novel surfactants based on poly(alkylene carbonate)s

Polyvinyl acetate/allyl alcohol copolymers uniformly dispersible in or miscible with polyether and polyester polyols and useful in preparing urethane foams.

Polyvinyl acetate/allyl alcohol copolymers

The invention pertains to flame retardant flexible polyurethane foams prepared by reacting a polyether polyol, or organic isocyanate, and a blowing agent incorporating (a) melamine in an amount ranging from about 30 weight percent to about 55 weight percent and an effective amount of (b) another flame retardant.

Flame retardant polyurethane foams

The invention pertains to flame retardant polyurethane foams prepared by the reaction of a polyoxyalkylene polyether polyol with an organic polyisocyanate and a blowing agent wherein melamine is incorporated as the sole flame retardant compound. The amount of melamine may range from about 10 weight percent to about 55 weight percent of the total composition.

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Detroit, MI, United States of America

Steven D Gagnon