Abstract: This invention relates to a process for the production of polyurethane resins (more particularly foam resins) in which linear polyamines containing at least four tertiary nitrogen atoms are used as catalysts. The compounds correspond to the general formula: ##STR1## wherein the groups R, which may be the same or different, represent methyl or ethyl groups; m represents an integer of from 2 to 7; and the integers n, which may be the same or different, represent 2 or 3.

Abstract: A process is provided for introducing mixed foamable reactants to a mold. The process involves introducing the reactants into a mixing chamber through injection apertures in its side wall portion. The mixing chamber has an outlet aperture communicating with the cavity of the mold. Prior to introducing the reactants into the mixing chamber, a displacement piston having a smaller cross-section than the mixing chamber is inserted into the outlet aperture of the mixing chamber so that the injection apertures communicate with the mold cavity by means of a generally annular passage.

Abstract: The instant invention is broadly directed to novel polyether esters and the use thereof in manufacturing polyurethane resins. The novel products are produced by esterifying an alkoxylated, halogenated bisphenol, a polycarboxylic acid and a dihydric alcohol.

Abstract: Novel compounds which upon heating are converted into the corresponding phenol which is a catalyst for the trimerization of compounds having isocyanato groups to form isocyanurates have the formula: ##STR1## in which N REPRESENTS AN INTEGER OF FROM 1 TO 4A represents an aromatic hydrocarbon group obtained by removing the NCO group from a monomeric aromatic monoisocyanate containing 6 - 14 carbon atoms,R.sub.1 and R.sub.2 may be the same or different and represent a C.sub.1 to C.sub.6 alkyl group or a polymethylene chain containing 4 to 8 carbon atoms which together with the nitrogen atom form a heterocyclic ring,R.sub.3 may be hydrogen, chlorine, bromine or a C.sub.1 - C.sub.18 -alkyl group.

Abstract: The instant invention is directed to an improved device for the continuous production of foam blocks of rectangular cross-section, comprising an endless conveyor belt with side walls, means for supplying a covering sheet to the upper surface of the upper rim of the conveyor belt and the side walls, a charging device for supplying a foamable reaction mixture to the upstream end of the said upper rim of the conveyor belt, and a plurality of mold covers which are placed along the foaming area and each of which is suspended from a guiding device, the improvement wherein each guiding device comprises first and second links secured to mounting means, a diagonally extending rod pivotally connected at its lower end to the mold cover, a first lever pivotally connected at one end to the first link and pivotally connected at its opposite end to a point on the rod intermediate its ends, and a second lever pivotally connected at one end to the second link downstream of the pivotal connection between the first lever and th

Abstract: This invention relates to a continuous process for the production of polyisocyanate polyaddition products using a multi-phase reaction flow tube as reactor.

Abstract: The present invention relates to isocyanato-polysulphonic acids comprising from 1 to 3 aromatically bound isocyanate groups which may be present at least partly in the dimerized form as uretdione groups and from 2 to 6 sulphonic acid groups for each non-dimerized isocyanato-polysulphonic acid or for each monomeric isocyanato-polysulphonic acid on which the dimer is based. These acids are produced by reacting mono- or poly-isocyanates having exclusively aromatically bound isocyanate groups with sulphur trioxide at -10.degree. C to 140.degree. C, wherein the isocyanate used as starting material which is to be sulphonated is reacted with at least 50% by weight of sulphur trioxide, based on the quantity of isocyanate used as starting material. Alternatively they may be produced using isocyanate-monosulphonic acids which have exclusively aromatically bound isocyanate-groups.

Abstract: This invention relates to a new process for the production, in inert organic solvents, of physiologically compatible polyisocyanates containing isocyanurate groups which have a monomeric diisocyanate content, based on solids, of at most 0.7%, by weight. The process uses Mannich bases as the trimerizing catalyst at temperatures below 60.degree. C and the reaction is terminated at the desired degree of trimerization by thermally decomposing the catalyst or by deactivating with a catalyst poison.

Abstract: An elastic polyurethane foam having a density, sag factor, tensile strength and elongation at break which adapt it for use in upholstery is prepared by reacting a poly(alkylene ether) polyol having at least about 10% by weight of primary hydroxyl groups and hydrazine or a hydrazine adduct with an organic polyisocyanate which contains at least about 50% by weight of distilled tolylene diisocyanate.

Abstract: This invention relates to novel halogen-free flame retarding agents and a process in which they are used in the production of polyurethanes. These compounds are represented by the general formula: ##STR1## wherein: R.sub.1 represents C.sub.1 -C.sub.5 alkylene groups which may be branched,R.sub.2 represents C.sub.1 -C.sub.3 alkyl groups which may be branched or R.sub.1 OH andR.sub.3 represents C.sub.1 -C.sub.8 -alkyl, C.sub.1 -C.sub.8 -dialkylamino, C.sub.1 -C.sub.4 -oxyalkyl, C.sub.1 -C.sub.4 -thioslkyl, C.sub.6 -C.sub.14 -aryl or C.sub.7 -C.sub.15 -aralkyl groups or ##STR2## and A and L may be identical or different and represent C.sub.1 -C.sub.10 -alkyl groups, which may be branched, benzyl groups or OR groups, whereinR represents an alkyl group, with 1-8 C atoms which may be branched, or a benzyl group.

Abstract: This invention relates to novel flame retarding agents and processes in which they are used in the production of polyurethanes. These compounds are represented by the general formula: ##STR1## wherein: A and L, which are identical or different, represent optionally branched C.sub.1 -C.sub.17 -alkyl groups or -OR groups wherein R represents an optionally branched C.sub.1 -C.sub.8 -alkyl group, andX represents hydrogen, halogen, an optionally branched C.sub.1 -C.sub.8 alkyl group, a C.sub.6 -C.sub.12 aryl or aralkyl group, NH.sub.2, CF.sub.3, CN, COOR', SO.sub.3 R', ##STR2## wherein: R' represents hydrogen or an optionally branched alkyl or cycloalkyl group having 1-10 C atoms andR" represents an optionally branched alkyl or cycloalkyl group having 1-10 C atoms.

Abstract: The instant invention is directed to an improved device for mixing liquid reaction components comprising a storage container for each reaction component, a feed pipe leading from each container to a mixing head where the pipe terminates in a pressure controlled injecting jet, and a return pipe containing a shut-off valve, the improvement wherein a pressure adjustable initial stress valve is located in each return pipe. The adjusted initial stress pressure is greater than the solution pressure of the gases or air contained in the reaction components but less than the opening pressure of the injection jet.

Abstract: New chemical compounds containing the radicals --CO--NH--CH.sub.2 --OR; ##STR1## wherein R is an alkyl radical having one to six carbon atoms and R.sub.1 is an alkylene radical having one to six carbon atoms and a process for making polyurethanes with the new compounds as a catalyst are provided.

Abstract: This invention relates to aqueous alkali metal silicate/iron oxide pigment suspensions which are resistant to sedimentation, to a process for the preparation thereof and to the use thereof. The pigment suspensions comprise:A. from about 10 to about 40%, by weight, of iron oxide pigment,B. from about 20 to about 40%, by weight, of alkali metal silicate andC. from about 30 to about 70%, by weight, of water,Wherein at least 95% by weight of the iron oxide pigment has a particle size equal to or less than 1 .mu..

Abstract: The invention relates to a process for preparing cold-hardening foams containing urethane groups using as an emulsifier, sulphonamide compounds of the formula: ##STR1## wherein R represents an alkyl, chloroalkyl, cycloalkyl radical having from 8 to 30 carbon atoms, or an alkaryl radical having from 10 to 30 carbon atoms,R.sup.1 and R.sup.2, which may be the same or different, each represent a hydrogen atom, a chloromethyl, methyl, ethyl or phenyl radical,m is an integer of from 0 to 50,R.sup.3 represents a hydrogen atom, an alkyl, aralkyl, alkaryl, aryl radical or a --(CHR.sup.1 -CHR.sup.2 -O-).sub.m R.sup.4 - group andR.sup.4 represents a hydrogen atom, an alkyl, aralkyl, acyl, carbamoyl or cyanalkyl radical having from 1 to 20 carbon atoms.The use of these additions results in an increase in compression hardness without detrimental effects on other foam properties.

Abstract: This invention relates to a process for making optionally cellular cross-linked elastomeric polyurethane resins from(a) polyisocyanates,(b) higher molecular weight polyhydroxyl and/or polyamino compounds containing filler particles,(c) chain lengthening agents and, optionally,(d) blowing agents, catalysts and other additives known per se,Wherein filler particles capable of being cross-linked with the formaldehyde are used and wherein the elastomeric polyurethanes which contain fillers are cross-linked with formaldehyde or formaldehyde releasing compounds, after the chain lengthening reaction has been substantially completed.

Abstract: This invention relates to the use of certain finely divided, stable and relatively low viscosity dispersions of polyisocyanate polyaddition products in compounds having hyroxyl groups. The dispersions are produced by reacting1. organic polyisocyanates with2. compounds having primary and/or secondary amino groups and/or primary hydroxyl groups in3. compounds having at least one hydroxyl group, whereinCompounds (3) have secondary hydroxyl groups in cases when compounds (2) have primary hydroxyl groups and wherein the components are reacted in the presence of more than 4% by weight of water, based on the quantity of reaction mixture including water.

Abstract: The instant invention relates to the use of stable, relatively low viscosity dispersions of polyisocyanate-polyaddition products in hydroxyl containing compounds as dispersing agents in the preparation of polyurethane resins. The dispersions are made by a process which broadly comprises mixing an aqueous dispersion of an isocyanate-polyaddition product with a compound having at least two hydroxyl groups and having a boiling point about 100.degree. C, and thereafter at least partially distilling off the water.

Abstract: Polyaminopolyarylmethanes and a monoarylamine are heated in water in the presence of a solid acid catalyst insoluble in the reaction mixture to convert the polyarylaminopolyarylmethanes into diaminodiarylmethanes.

Abstract: A method for making microporous sheets is provided wherein a dispersion of a cationic and/or anionic polyurethane is mixed with a solution containing a non-ionic polyurethane and the resulting mixture is coagulated with a non-solvent for the non-ionic polyurethane.