Abstract: This invention relates to a process for the preparation of stable dispersions of hydroxyl-containing polyhydrazodicarbonamides in a hydroxyl-containing compound. The dispersions are prepared by the reaction of organic isocyanates, isocyanate-reactive compounds having a molecular weight in the range from 400 to 10,000, relatively low molecular weight isocyanate-reactive compounds, and hydrazines or hydrazides. This invention further relates to the dispersions prepared by said process, the use of the dispersions to prepare polyurethane foams having exceptional hardness, and the foams prepared thereby.

Abstract: The present invention is directed to a process of thermoplastically molding a specific foam composition. The composition is formed by reacting an isocyanate and a relatively low molecular weight tri or higher polyol in the presence of a blowing agent.

Abstract: The present invention relates to polyisocyanate compositions containing reversibly blocked catalysts for the isocyanate addition reaction, characterized in that they contain(a) at least one organic polyisocyanate,(b) at least one addition product dissolved or dispersed in the polyisocyanate compositions, of a sulfonyl isocyanate with a tertiary amine and/or with a catalyst having a tin(II)- or tin(IV)-carboxylate structure as the reversibly blocked catalyst.The present invention also relates to a process for producing these polyisocyanate compositions and to the use of new polyisocyanate compositions as reactants for compounds containing isocyanate-reactive groups for the production of isocyanate addition products such as polyurethane plastics using a one-component or two-component principle. The present invention finally relates to the latent polyurethane catalysts prepared from a sulfonyl isocyanate and a tin(II)- or tin(IV)-carboxylate.

Abstract: The present invention is directed to a process for the production of optionally foamed polyurethanes which are combined or fabricated with another material, comprising reacting compounds with molecular weights from 400 to 10,000 containing at least 2 isocyanate reactive hydrogen atoms with polyisocyanates in the presence of catalysts containing tertiary amino groups and combining or fabricating the resulting polyurethane with another material, characterized in that the catalysts used are diffusion resistant aminoalkanols corresponding to the general formula ##STR1## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 may be identical or different and represent hydrogen or a C.sub.1 -C.sub.6 alkyl group,R.sup.5, R.sup.6, R.sup.7 and R.sup.8 may be identical or different and represent a C.sub.1 -C.sub.6 alkyl group or together form a C.sub.2 -C.sub.6 alkylene group which may contain hetero atoms such as O or NR (R=C.sub.1 -C.sub.4 alkyl), and n and m may be identical or different and represent integers from 1 to 6.

Abstract: Polyurethanes are made by reacting a polyisocyanate with a compound containing at least two isocyanate-reactive hydrogen atoms having a molecular weight of from 400 to 10,000 in the presence of a catalyst containing tertiary amino groups. The required catalyst corresponds to the formula ##STR1## in which R, R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6 and R.sup.7 represent a specified group or radical. A blowing agent and/or stabilizer and/or chain extending agent and/or other additives commonly used in the production of polyurethanes may optionally be included in the reaction mixture. The catalyst employed in the process is particularly advantageous in that it does not have a noticeable amine odor.

Abstract: 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).

Abstract: The present invention is directed to an upholstered seat consisting of an in situ foam core based on a cold foam formulation and an air-permeable covering and to a process for integrally producing an upholstered seat with improved standards of comfort by back foaming a covering material in a mold, characterized in that, in a split mold of which the dividing plane preferably extends in the vicinity of the actual seat surface, a sealed foam-impermeable covering material is applied to the internal contour of the mold and that part of the covering material which forms the actual seat surface is clamped in the dividing plane of the mold, the entire mold cavity is filled with foam by metering the foam in correspondingly large quantities, after which the sealing layer around the fully reacted foam core, where it consists of an air-impermeable material, is destroyed by a mechanical treatment, such as needle punching, flexing, compression, knocking, or by solvents to at least such an extent that it becomes permeable t

Abstract: A process for the production of an optionally cellular polyurethane by reacting at least one compound having at least two hydrogen atoms which are reactive with isocyanate groups and have a molecular weight of from about 400 to 10,000 with polyisocyanates in the presence of a poly(dialkylaminoalkyl)ether catalyst corresponding to the formula ##STR1## wherein A represents a straight-chain or branched-chain (x+1)-valent, optionally substituted C.sub.2 -C.sub.6 alkyl radical,x represents an integer of 1 to 4 andR.sup.1 -R.sup.4 represent the same or different C.sub.1 -C.sub.4 alkyl radicals, which optionally form a heterocyclic radical with N.

Abstract: This invention relates to a process for the production of polyurethanes, particularly polyurethane foam moldings having a compact skin and a cellular core, using special tin activators.

Abstract: The invention relates to a process for the preparation of foamed or unfoamed polyurethanes by the reaction of compounds with molecular weights of 400 to 10,000 having at least two isocyanate-reactive hydrogen atoms with polyisocyanates in the presence of catalysts containing tertiary amino groups and optionally in the presence of chain-lengthening agents of molecular weight 32 to 400, foam stabilizers, water and/or organic blowing agents and optionally other auxiliary agents and additives, characterized in that the catalysts are morpholine derivatives of the general formula ##STR1## wherein X is an integer from 3 to 6 andR.sup.1 and R.sup.2 are identical or different and(a) represent a C.sub.1 -C.sub.6 -alkyl or C.sub.6 -C.sub.10 -cycloalkyl group or(b) form a heterocyclic ring containing 4-7 C-atoms, which heterocyclic ring may contain hetero groups in addition to the N-atom and wherein the additional hetero groups may be substituted by a C.sub.1 -C.sub.

Abstract: A process for preparing modified polyisocyanates in which an organic polyisocyanate is reacted with a polyamine present in less than stoichiometric amount. Polyamines suitable to this process include (a) polyamines having more than three nonaromatically bound, basic nitrogen atoms of which at least two are primary and/or secondary amino nitrogen atoms, and (b) polyamine mixtures having an average of more than three nonaromatically bound, basic nitrogen atoms of which at least two are primary and/or secondary amino nitrogen atoms. These modified polyisocyanates are particularly useful starting materials for production of polyurethane plastics by the isocyanate-polyaddition process.