The Dow Chemical Company

The Firestone Tire & Rubber Company

Robert B. Turner

James R. Porter

Robert B Turner

Ralph D Priester, Jr

Richard D Peffley

Ronald M Herrington

Oomman P Thomas

James R Porter

Randall C Jenkines

Larry W Mobley

Kenneth W Skaggs

James A Vanderhider

Manuel Gonzales, Jr

James E McGrath

Gerald M Lancaster

Christopher P Christenson

Raymond A Plepys

Laura A Grier

John F Serratelli

Paul L Neill

Joseph H Tazewell

James K Jennings

Douglas K Hillshafer

Robert M Harnden

Llewellyn D Booth

Roney J Matijega

Terry L Lamb

Roy E Morgan, Jr

Clyde G Taylor

Kimbley A Bushman

Youngtai Yoo

Garland R Barnes

Robert A Kuklies

Stephen R Burkes

Donald H Ridgway

Diane M Lewis

Novel catalyst compositions comprising complexes of tin(IV) salts and amine compounds are used to prepare polyurethanes, polyureas, polycarbodiimides and polyisocyanurates. The complexes, which preferably employ primary amines, allow delay of gelation until they dissociate under certain reaction conditions. The complexes can be prepared neat or in situ in an active hydrogen containing formulation component. The complexes serve to delay gelation of the formulation because they can be prepared to be relatively stable to moisture and will predictably dissociate upon heating, either as a result of the exothermic nature of the reaction being catalyzed or with application of an external heat source. The catalyst compositions are particularly useful for preparation of carpet underlay and in other applications requiring significant delay prior to gelation.

Process for preparation of polyurethanes utilizing novel catalysts

The invention includes a process for preparing a flexible, water-blown polyurea foam by reacting a reaction mixture containing at least one polyisocyanate component and an active hydrogen component, wherein active hydrogen compounds of relatively high equivalent weight have an average of about 1.5 to about 4 active hydrogen-containing groups per molecule, of which active hydrogen-containing groups: an average of (a) from about 5 to about 60 percent are primary aliphatic amine groups or (b) at least about 25 percent are primary aromatic, secondary aliphatic, Lewis acid-blocked primary or secondary aliphatic or aromatic amine groups or mixtures of such groups. An amount of at least one alkali metal halide salt effective to increase load bearing strength of the foam is incorporated into the reaction mixture. Differing amounts of alkali metal halide salts are suitably incorporated into different areas of the foam to produce areas having differing load bearing strengths. The invention includes the foams formed by the processes of the invention as well as active hydrogen compositions containing the alkali metal halide salts and useful in the processes.

Flexible polyurea foams having controlled load bearing qualities

A process is disclosed for preparing a polyurethane or polyurea elastomer by reacting in a closed mold a reaction mixture comprising a polyisocyanate and a relatively high equivalent weight polyether. The process is characterized by employing as said polyether a polymer or copolymer of propylene oxide having at least two hydroxyl groups per molecule, an equivalent weight from about 1000 to about 5000 and a monofunctional species content of about 0.04 milliequivalents/gram of polymer or less.

Process for preparing elastomeric polyurethane or polyurethane-urea

Described herein is an isocyanate-reactive compound containing at least one linkage of the formula:

Combustion-modified polyurethane foam

Polyurethane foams having a specified glass transition temperature are densified for transportation or other purposes by heating the foam to a temperature above its T.sub.g, compressing the heated foam, and then cooling the compressed foam to a temperature below its T.sub.g. The cooled foam remains in a densified state until re-heated to a temperature above its T.sub.g, whereupon it re-expands to assume its original dimensions.

Densifiable and re-expandable polyurethane foam

Flexible polyurethane foams are prepared from poly(propylene oxide) polymers having low levels of monofunctional impurities. The resulting foam has improved processing characteristics and compression set.

Flexible polyurethane foams prepared using low unsaturation polyether

A polyurea foam is formed from a reaction mixture comprising at least one polyisocyanate component and an active hydrogen component, wherein active hydrogen compounds of relatively high equivalent weight have an average of about 1.5 to about 10 active hydrogen-containing groups per molecule, of which active hydrogen-containing groups: an average of (a) from about 5 to about 60 percent are primary or secondary aliphatic amine groups or (b) at least about 25 percent are primary aromatic, Lewis acid-blocked primary aliphatic, secondary aliphatic or aromatic amine groups or mixtures thereof. Carbon dioxide is adducted to said active hydrogen component. The adduct releases carbon dioxide to blow the foam.

Use of carbon dioxide adducts as blowing agents in cellular and

Polyether active hydrogen compounds having at least two terminal active hydrogen groups on primary carbon atoms are prepared by (a) forming polyoxyalkylene molecules each having at least one active hydrogen precursor, (b) linking at least two of the polyoxyalkylene molecules, and (c) converting the active hydrogen precursor groups to active hydrogen groups on primary carbon atoms. The polyoxyalkylene molecule is formed by exposing a reaction mixture comprising at least one alkylene oxide and at least one protective initiator to conditions effective for the polymerization of the alkylene oxides. Linking is accomplished at polyether chain ends distal to the protected active hydrogen precursor groups, such that the active hydrogen precursors remain on the linked polyether chains until they are converted to active hydrogen groups. The process is particularly useful to produce polyether compounds having at least about 80 mole percent primary active hydrogen groups, which compounds are useful, for instance, in forming polyurethanes.

Primary polyether active hydrogen compounds which are prepared from

Substrates having successive layers of a cellular polyurethane and a noncellular polyurethane are prepared using certain siloxane-polyether block copolymers in the noncellular polyurethane formulation. The use of the block copolymer reduces or eliminates the formation of a bubble line at the interface of the polyurethane layers, thereby improving physical and cosmetic properties of the carpet.

Process for preparing polyurethane-backed substrate

In one aspect, this invention is a polyurethane polymer having dispersed therein elongated particles of a high-melting, rigid polymer in an amount sufficient to measurably increase the tensile strength and/or elongation of the polyurethane relative to a like polyurethane which is prepared in the absence of said elongated particles. In another aspect, this invention is an active hydrogen-containing composition comprising at least one active hydrogen-containing compound having dispersed therein elongated particles of a high-melting rigid polymer in an amount which provides reinforcement to a polyurethane polymer prepared by reacting said active hydrogen-containing composition with a polyisocyanate.

Organic polymers reinforced with rigid rod micro fillers

Polyurethane-backed textiles are prepared from a polyurethane-forming composition employing a polyether polyol having an equivalent weight of at least about 1000, a specified functionality and an internal poly(ethylene oxide) block or a terminal ethylene oxide end cap of at least about 15% by weight. The use of these polyether polyols provides a particularly desirable combination of processing and physical characteristics.

Process for preparing polyurethane carpet backings based on high

Improved low temperature properties of polyureaurethane are obtained, such as low glass transition temperatures and reduced bending moduli at -400.degree. C., by the use of relatively high moleuclar weight polyether polyol intermediates. The polyureaurethane is made by reacting the polyether polyol intermediate with a diisocyanate and subsequent cure with a metal halide salt complex of methylenedianiline.

Polyureaurethanes having improved low temperature properties based on

An organic bulk polymer is disclosed having microscopically dispersed therein a liquid crystalline polymer in an amount sufficient to measurably improve the properties of the organic polymer relative to a like bulk polymer in the absence of the liquid crystalline polymer.

Organic polymers containing dispersed liquid crystalline filler polymers

A solution or colloidal dispersion of a polymer of an ethylenically unsaturated steroid derivative in an active hydrogen-containing compound is claimed. The polymer provides improved physical properties to a polyurethane made by reacting the solution or dispersion with an polyisocyanate.

Polyurethanes prepared from dispersions or solutions of cholesterol or

Polyurethanes are prepared from a polyol which itselve contains liquid crystalline moieties or which contains dispersed or dissolved liquid crystalline polymers. The use of this polyol is found to provide improved properties to polyurethanes, especially flexible polyurethane foams, which exhibit improved load bearing.

Growing community of inventors

Lake Jackson, TX, United States of America

Robert B Turner