Bayer Corporation

Mobay Chemical Corporation

Kenneth P Yonek

Douglas A Wicks

Lyuba K Gindin

Philip E Yeske

Arthur W Mason

Peter D Schmitt

Peter H Markusch

William E Slack

Rick L Adkins

James W Rosthauser

Edward P Squiller

Terry A Potter

Hersel T Kemp, Ii

Lanny D Venham

Patricia B Jacobs

Clarence D Blue

Yuliya Berezkin

Jeffrey S Bolton

Brian H Peterson

Mark R Kratz

Kirk J Bourgeois

Roger C Suter

This invention relates to storage-stable, liquid, partially trimerized polyisocyanates having an NCO group content of 24 to 40% by weight, and comprising 20 to 88% by weight of toluene diisocyanate and 12 to 80% by weight of a polyisocyanate of the diphenylmethane series. The present invention also relates to a process for the preparation of the storage-stable, liquid, partially trimerized polyisocyanates; to storage-stable, liquid urethane prepolymers of these partially trimerized polyisocyanates; and to a process for the production of these storage-stable, liquid, urethane prepolymers.

Liquid partially trimerized polyisocyanates based on toluene diisocyanate and diphenylmethane diisocyanate

This invention relates to a process for the reduction of color of polymethylene poly(phenylisocyanates). This process comprises mixing a polymethylene poly(phenylisocyanate) with an epoxide having an epoxide equivalent weight of about 44 to about 700, and heating this mixture to a temperature of from about 35 to about 150.degree. C. for at least about 15 minutes, with stirring. Suitable epoxides include epoxidized fatty acid monoglycerides, epoxidized fatty acid diglycerides, epoxidized fatty acid triglycerides, epoxidized dimer fatty acids and epoxidized trimer fatty acids.

Color reduction of polymethylene poly (phenylisocyanates)

The present invention relates to a process for preparing aqueous polyurethane dispersions in a multi-step process by forming an NCO prepolymer by

Aqueous polyurethane dispersions containing non-cyclic diisocyanates and

The present invention is directed to a powder coating composition containing as binder

Blocked polyisocyanate crosslinkers for providing improved flow

The present invention relates to aqueous dispersions of polyurethanes containing hydantoin groups (calculated as C.sub.3 N.sub.2 O.sub.2, MW 96) in an amount of 1 to 40% by weight, based on resin solids. The present invention also relates to the use of these dispersions for preparing coatings with excellent hydrolytic and thermal stability.

Aqueous polyurethane dispersions and their use for preparing coatings

The present invention relates to a coating composition for the preparation of a polyurea coating which contains

Polyurea coating compositions having faster dry times

The present invention relates to blocked polyisocyanates containing at least one isocyanate group which is reversibly blocked with a monofunctional blocking agent for isocyanate groups and at least one isocyanate group in the form of a urea group, which may be converted to a thermally stable hydantoin group. The present invention also relates to one-component coating compositions containing these blocked polyisocyanates and compounds containing isocyanate-reactive groups.

Blocked polyisocyanates with improved thermal stability

The present invention relates to aqueous dispersions of polyureas containing hydantoin groups (calculated as C.sub.3 N.sub.2 O.sub.2, MW 96) in an amount of 1 to 40% by weight, based on resin solids. The present invention also relates to the use of these dispersions for preparing coatings having excellent hydrolytic and thermal stability.

Aqueous polyurea dispersions and their use for preparing coatings with

The present invention relates to aqueous polyurea dispersions wherein the polyureas contain 0.1 to 25% by weight, based on the weight of the polyureas, of en-urea groups (calculated as --NH--C(O)--N--, MW 57) obtained by the reaction of an isocyanate group with an aldimine group prepared from a cyclic polyamine containing (cyclo)aliphatically bound amino groups. The present invention also relates to a process for preparing these aqueous polyurea dispersions and to their use for preparing coatings.

Aqueous polyurea dispersions with improved hardness and solvent

The present invention relates to blocked polyisocyanates containing at least one isocyanate group which is reversibly blocked with a monofunctional blocking agent for isocyanate groups and at least one isocyanate group in the form of a thermally stable hydantoin group. The present invention also relates to one-component coating compositions containing these blocked polyisocyanates and compounds containing isocyanate-reactive groups.

The present invention relates to blocked polyisocyanates containing at least two isocyanate groups which are reversibly blocked with a monofunctional blocking agent for isocyanate groups and at least two isocyanate groups in the form of urea groups, which may be subsequently converted to thermally stable hydantoin groups. The present invention also relates to one-component coating compositions containing these blocked polyisocyanates and compounds containing at least two isocyanate-reactive groups.

The present invention relates to blocked polyisocyanates containing at least two isocyanate groups which are reversibly blocked with a monofunctional blocking agent for isocyanate groups and at least two isocyanate groups in the form of thermally stable hydantoin groups. The present invention also relates to one-component coating compositions containing these blocked polyisocyanates and compounds containing at least two isocyanate-reactive groups.

The present invention is directed to an organic polyurethane composition having a solids content of about 10 to 100 weight percent which comprises

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McMurray, PA, United States of America

Kenneth P Yonek