Abstract: A homogeneous, demixing-stable polyol component comprising at least two relatively high molecular weight compounds containing at least two reactive hydrogen atoms and, if desired, low molecular weight chain extenders and/or crosslinkers and also, if desired, blowing agents, catalysts and further auxiliaries and/or additives is prepared by adding at least one amine and at least one organic and/or modified organic isocyanate to this component.This polyol component is useful for producing polyurethanes, in particular compact and foamed polyurethanes.

Abstract: Polyurethane foams are produced by reactinga) organic and/or modified organic diisocyanates and/or polyisocyanates withb) at least one relatively high molecular weight compound containing at least two reactive hydrogen atoms,c) at least one compound containing from three to eight, preferably from three to six, reactive hydrogen atoms andd) low molecular weight chain extenders and/or crosslinkers containing at least two reactive hydrogen atomsin the presence ofe) blowing agentsf) catalysts and, if desired,g) further auxiliaries and additives,wherein (c) are ethylene oxide-rich adducts having an ethylene oxide content of more than 50% by weight and an OH number of from 200 to 800 mg KOH/g and (d) are polyfunctional chain extenders and/or crosslinkers having an OH number of more than 700 mg KOH/g.The polyurethane foam produced by this process can be used as upholstery material.

Abstract: A process for preparing a homogeneous polyol component which is stable to separation and consists of at least one compound of relatively high molecular weight having at least two reactive hydrogen atoms and low-molecular-weight chain extenders and/or crosslinkers and, if desired, of blowing agents, catalysts and other auxiliaries and/or additives comprises the addition to this component of at least one amine and at least one organic and/or modified organic isocyanate; the invention also provides the corresponding polyol component which is stable to separation.The use of this polyol component for preparing PUR, in particular compact or foamed PUR, is also described.

Abstract: A stable dispersion of melamine in polyol components comprising at least one relatively high molecular weight compound containing at least two reactive hydrogen atoms and, if desired, low molecular weight chain extenders and/or crosslinkers, blowing agents, catalysts, flame retardants and also further auxiliaries and/or additives is prepared by using the melamine in combination with at least one amine and at least one organic and/or modified organic isocyanate.

Abstract: A stable dispersion of melamine in polyol components comprising at least one relatively high molecular weight compound containing at least two reactive hydrogen atoms and, if desired, low molecular weight chain extenders and/or crosslinkers, blowing agents, catalysts, flame retardants and also further auxiliaries and/or additives is prepared by using the melamine in combination with at least one amine and at least one organic and/or modified organic isocyanate. Such a dispersion can be used for producing flame-resistant polyurethane foams.

Abstract: The invention relates to a process for the production of rigid to semirigid polyurethane foams having an increased proportion of open cells and reduced shrinkage using recyclate polyols. The invention furthermore relates to the rigid to semirigid polyurethane foams produced by this process.

Abstract: A process for the production of cellular polyurethanes by reactinga) at least one organic and/or modified organic polyisocyanate,b) at least one relatively high-molecular-weight compound containing at least two reactive hydrogen atoms, if desiredc) low-molecular-weight chain extenders and/or crosslinking agents,in the presence ofd) blowing agents,e) catalysts, and, if desired,f) auxiliaries and/or additives,wherein the blowing agent d) is at least one acetal.

Abstract: The invention relates to polyurethane-based, compact moldings or moldings having a cellular core and a compacted surface which comprise crosslinked poly(meth)acrylic acid, poly(meth)acrylic acid salts and/or poly(meth)acrylamides, to a process for their production, and to their use as shoe or shoe sole material.

Abstract: The invention relates to polyurethane-based, compact moldings or moldings having a cellular core and a compacted surface which comprise crosslinked poly(meth)acrylic acid, poly(meth)acrylic acid salts and/or poly(meth)acrylamides, to a process for their production, and to their use as shoe or shoe sole material.