Bayer Aktiengesellschaft

Hans-Walter Illger

Klaus Konig

Hans-Josef Buysch

Peter Haas

Karl H Dorner

Manfred Schmidt

Wulf Von Bonin

Hans-Heinrich Moretto

Manfred Dahm

Holger Meyborg

Armand De Montigny

Peter Vehlewald

Peter Seifert

Alberto C Gonzalez-Dorner

Hansjurgen Rabe

Alberto C Gonzalez-Doerner

Manfred Naujoks

Gunter Baatz

Manfred Bock

Manfred Dietrich

Robert Eiben

Werner Mormann

Wolfgang Reichmann

Gundolf Jacobs

Hans-Albrecht Freitag

Geza Avar

Heinz Muller

Claus-Dieter Sommerfeld

Klaus-Dieter Wolf

Hans-Joachim Kogelnik

Peter Vogtel

A present invention relates to a process for preparing elastic, flexible slabstock foams by reacting polyisocyanates with at least one polyol having a molecular weight from 2,000 to 10,000, having a functionality of 2 to 4, which have at least two hydrogen atoms capable of reacting with said polyisocyanates; at least one polyol having a molecular weight from 400 to 4,000, having a functionality of 4 to 8 and having at least four hydrogen atoms capable of reacting with isocyanates; water and optionally, organic blowing agents; stabilizers; activators; additives and auxiliary agents; optionally, low molecular weight cross-linking agents with a molecular weight of 32 to 399; and liquid CO.sub.2, which is used as an additional blowing agent, and is decompressed in a decompression chamber containing fine-meshed gratings upstream of the discharge point to the conveyer belt.

Process for preparing elastic polyurethane slabstock foams

Low-fog flexible polyester polyurethane foams are produced by reacting

Process for the production of low-fog flexible polyester polyurethane

This invention relates to a process for the production of elastic, open-cell flexible slabstock polyurethane foams comprising reacting at an isocyanate index less than about 80 one or more polyisocyanates selected from the group tolylene diisocyanates, hexamethylene diisocyanate, and isophorone diisocyanate, with compounds containing at least two isocyanate-reactive hydrogen atoms and having a molecular weight of about 400 to about 10,000, in the presence of water as blowing agent in a quantity of about 5 to about 15 parts by weight for every 100 parts by weight of the isocyanate-reactive compound. The process may optionally include chain-extending and crosslinking agents containing at least two isocyanate-reactive hydrogen atoms and having a molecular weight of about 32 to about 399, and may optionally be carried out in the presence of other blowing agents, catalysts, auxiliaries, and additives.

Process for the production of flexible slabstock polyurethane foams

Flexible polyurethane foams having increased compression hardness are produced by reacting an organic polyisocyanate with a mixture of polyols in the presence of a blowing agent and optionally known additives such as catalysts, emulsifiers, etc. The mixture of polyols is (1) 75-95 wt % polyether polyol with terminal OH groups having a functionality of from 2 to 4 and an OH number of from 25 to 60 and (2) 5-25 wt % polyether polyol having a functionality of at least six and an OH number of from 150 to 200 which is the reaction product of an alcohol having a functionality of at least six and propylene oxide which has been modified to contain 5-50 wt % terminal ethylene oxide groups. These foams are useful in furniture applications.

Process for the production of elastic, open-celled flexible polyurethane

Composite polyisocyanate addition products are formed from (1) the reaction product of a compound having at least two isocyanate-reactive hydrogen atoms and a molecular weight of from 400 to 10,000, a polyisocyanate and a catalyst which is a diffusion stable amino alkyl urea having tertiary amino groups and corresponds to the formula ##STR1## in which R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6, R.sup.7 and n each represent specified groups or values and (2) another different material such as polyvinyl chloride, ABS, lacquers and textiles. Known additives such as blowing agents, chain extenders and foam stabilizers may optionally be used in the production of reaction product (1). The composite materials of the present invention which are particularly useful in the production of bedding and seating furniture, seats used in transport means, dashboard panels, arm-rests and for other similar applications are characterized by their lack of discoloration due to the diffusion of the catalyst employed in producing reaction product (1).

Process for the production of polyisocyanate addition products and

The invention relates to stabilizer-containing reactive components for the production of polyurethane foams having little or no tendency towards core discoloration which are characterized by a stabilizing addition of monomeric and/or oligomeric derivatives of the diphenylamine series, including the phenothiazine series. The invention also relates to new stabilizers of the diphenylamine and/or phenothiazine series and to a process for their production, characterized in that aromatic amines of the diphenylamine and/or phenothiazine series are reacted with bifunctional halogen derivatives, diols, bis-ethers or bis-esters or with bis-olefins formed therefrom at elevated temperatures in the presence of strong acids and the amines are optionally further alkylated.

Stabilizer-containing reactive components for pu-foams, new stabilizers

The invention relates to stabilizer-containing reactive components for the production of polyurethane foams having little or no tendency towards core discoloration which are characterized by a stabilizing addition of monomeric and/or oligomeric derivatives of the diphenylamine series, including the phenothiazine series. The invention also relates to new stabilizers of the diphenylamine and/or phenothiazine series and to a process for their production, characterized in that aromatic amines of the diphenylamine and/or phenothiazine series ae reacted with bifunctional halogen derivatives, diols, bis-ethers or bis-esters or with bis-olefins formed therefrom at elevated temperatures in the presence of strong acids and the amines are optionally further alkylated.

Polyorganopolysiloxane/polyoxyalkylene block copolymers suitable for use as stabilizers in making soft polyurethane foams, of the formula

Preparation of polysiloxane/polyoxyalkylene copolymer useful as

Stabilizer-containing reactive components for PU-foams, new stabilizers

A solution of a polyurethane in a polyol is made from (a) the reaction product of a polyisocyanate and a diprimary diol, and (b) a polyether in which the reaction product constitutes from 3 to 60 wt. % of the solution. Suitable diprimary diols have a molecular weight of from 90 to 800 and a structure at both hydroxyl groups corresponding to the general formula: ##STR1## in which R.sub.1 represents chlorine, an alkyl, cycloalkyl, aralkyl or aryl radical having from 1 to 10 carbon atoms, which carbon atoms may be substituted or interrupted by chlorine, ester groups, ether groups, amide groups, urethane groups or nitrile groups, and

Solution of a polyurethane in a polyol and a process for using such a

Polyorganopolysiloxane/polyoxyalkylene block compolymers suitable for use as stabilizers in making soft polyurethane foams, of the formula

The instant invention is directed to a process for the production of flame resistant foams by the impregnation of polyurethane foams with a dispersion consisting substantially of an aluminum hydroxide, a polyurethane latex, an aluminosilicate and surface active substances which results in foams having very desirable mechanical properties as well as excellent flame resistant properties.

Process for production of flame resistant foam

The instant invention relates to a process for the production of polyurethane foams by reacting polyisocyanates with polyhydroxyl compounds of a specified molecular weight range in the presence of blowing agents and chain lengthening or cross-linking agents and optionally in the presence of catalysts, foam stabilizers and other additives generally known. The improvement resides in

Integral-skin polyurethane foams and process therefor

The instant invention is directed to a process for the production of elastic polyurethane foams capable of being flame laminated and high frequency welded, comprising reacting

Growing community of inventors

Roesrath, Germany

Hans-Walter Illger