Abstract: Disclosed herein is a foam composition comprising a first epoxide comprising a first glycidyl epoxide and/or a first non-glycidyl epoxide; a second epoxide comprising a second glycidyl epoxide and/or a second non-glycidyl epoxide; wherein the first glycidyl epoxide is different from the second glycidyl epoxide and wherein the first non-glycidyl epoxide is different from the second non-glycidyl epoxide; wherein the first and the second epoxide are cationically polymerizable; an initiator; and a diluent; wherein the diluent is present in about 0.1 to 30 wt %, based on the total weight of the composition; wherein the composition upon external stimulus undergoes an ionic polymerization reaction in a spatially propagating reaction front or in a global reaction that occurs throughout an entire composition.

Abstract: The present invention relates to a process for producing rigid polyurethane foams by reaction of a) at least one organic polyisocyanate with b) at least one polyol component in the presence of a blowing agent mixture comprising water and halogenated alkenes, wherein the amount of water is at least 1.40 mol/kg of polyol component b) and the amount of halogenated alkene is at most 2.00 mol/kg of polyol component b), and also to the use of such a blowing agent mixture for producing corresponding rigid polyurethane foams and for increasing the adherence and reducing the thermal conductivity of corresponding rigid polyurethane foams. The present invention further relates to a rigid polyurethane foam obtainable by the process of the present invention.

Abstract: The invention relates to particle-comprising polyether alcohols which can be prepared by in-situ polymerization of olefinically unsaturated monomers in a polyether alcohol, wherein the polymerization is carried out in the presence of at least one compound (A) comprising a polysiloxane chain to which at least one polyether chain comprising at least one reactive hydrogen atom and a polyether chain comprising at least one olefinic double bond are bonded.

Abstract: The present invention relates to a dynamically evacuable, electrically operated device comprising a coherently evacuable region and a temperature-controllable useful region, which is thermally insulated from the ambient temperature by the coherently evacuable region, and also a means for actively maintaining a vacuum, such that the pressure in the coherently evacuable region of the device is constantly within a defined pressure range, said coherently evacuable region making up at least 20% by volume of the total volume which is occupied by a porous and/or cellular insulating material in the device, and said coherently evacuable region comprising at least one organic aerogel and/or organic xerogel.

Abstract: The invention provides a molding producible by a process comprising the following steps: a) introduction of a foamable reactive resin into a support material and b) compressive deformation of the support material comprising the foamable reactive resin.

Abstract: The invention relates to a composite element comprising a) a core made of a foam or of a porous material, b) an outer layer applied to the core a), and, c) a foil c) made of a thermoplastic and differing from the outer layer b).

Abstract: The invention relates to a process for producing polyurethanes by reacting a) polyisocyanates with b) compounds having at least two hydrogen atoms which are reactive toward isocyanate groups, wherein the compounds b) having at least two hydrogen atoms which are reactive toward isocyanate groups comprise at least one polyether alcohol b1) which has been prepared by reaction of an aromatic amine b1a) with propylene oxide using an amine b1b) which is different from b1a) as catalyst.

Abstract: The present invention relates to a process for producing polyurethane (PU) rigid foams by reaction of polyisocyanates with compounds having two or more isocyanate-reactive hydrogen atoms in the presence of blowing agents.

Abstract: The present invention relates to a dynamically evacuable, electrically operated device comprising a coherently evacuable region and a temperature-controllable useful region, which is thermally insulated from the ambient temperature by the coherently evacuable region, and also a means for actively maintaining a vacuum, such that the pressure in the coherently evacuable region of the device is constantly within a defined pressure range, said coherently evacuable region making up at least 20% by volume of the total volume which is occupied by a porous and/or cellular insulating material in the device, and said coherently evacuable region comprising at least one organic aerogel and/or organic xerogel.

Abstract: The present invention relates to a process for the production of polyurethane rigid foams by reaction of polyisocyanates with compounds with at least two hydrogen atoms reactive with isocyanate groups in the presence of propellants.

Abstract: The invention relates to a composite element comprising a) a core made of a foam or of a porous material, b) an outer layer applied to the core a), and, c) a foil c) made of a thermoplastic and differing from the outer layer b).

Abstract: A polyurethane foam reaction system to fix over an area of a vacuum insulation panel (VIP) on an inside of an outer wall of a cooling apparatus and/or on a outside of a wall of a inner container of the cooling apparatus, where the reaction system includes the following components: an organic and/or a modified organic polyisocyanate; at least one high molecular weight compound having at least two hydrogen atoms which are reactive toward a isocyanate group; a blowing agent; a catalyst; and a foam stabilizer, where the components are selected to obtain a closed-cell polyurethane foam having a free-foamed density of 50 to 1100 g/l and a compressive strength of ?15 kPa, excluding rigid integral foams.

Abstract: The invention relates to a process for producing polyurethanes by reacting a) polyisocyanates with b) compounds having at least two hydrogen atoms which are reactive toward isocyanate groups, wherein the compounds b) having at least two hydrogen atoms which are reactive toward isocyanate groups comprise at least one polyether alcohol b1) which has been prepared by reaction of an aromatic amine b1a) with propylene oxide using an amine b1b) which is different from b1a) as catalyst.

Abstract: The invention relates to a process for preparing polyether alcohols by reacting a) aromatic amines with b) alkylene oxides in the presence of c) a catalyst, wherein the alkylene oxide b) comprises at least 90% by weight, based on the weight of the component b), of propylene oxide and an amine is used as catalyst c).

Abstract: The invention relates to a process for preparing rigid polyurethane foams, which comprises reacting a) polyisocyanates with b) compounds having at least two hydrogen atoms reactive with isocyanate groups in the presence of c) blowing agents, wherein said compounds having at least two hydrogen atoms reactive with isocyanate groups b) comprise at least one polyether alcohol b1) having a functionality of 2-8 and a hydroxyl number of 200-800 mgKOH/g, obtained by addition of an alkylene oxide b1b) onto a compound having at least two hydrogen atoms b1a), hereinafter also known as starter substances, reactive with alkylene oxides by using an amine b1c) as catalyst.

Abstract: The invention relates to a process for preparing polyurethanes, which comprises reacting a) polyisocyanates with b) compounds having at least two hydrogen atoms reactive with isocyanate groups, wherein said compounds having at least two hydrogen atoms reactive with isocyanate groups b) comprise at least one polyether alcohol b1) having a functionality of 2-8 and a hydroxyl number of 200-600 mgKOH/g, obtained by addition of an alkylene oxide b1b) onto a compound having at least two hydrogen atoms reactive with alkylene oxides by using an amine b1c) as catalyst.

Abstract: In a process for preparing a polyether alcohol d1) by reaction of a) at least one compound having at least three hydrogen atoms reactive with alkylene oxides and a molecular weight Mn of not more than 600 g/mol with b) an alkylene oxide by using c) a catalyst, said reaction is carried out in the presence of a polyether alcohol d) having a hydroxyl number of 100-800 mg KOH/g and a functionality of 1.5 to 8.

Abstract: A cylindrical molding based on cellular polyurethane elastomers having a density according to DIN EN ISO 845 of from 300 to 900 kg/m3, a tensile strength according to DIN EN ISO 1798 of ?2.

Abstract: The present invention relates to a composite comprising an elastic polyurethane molding with compact surface and with cellular core and rubber, capable of production via introduction of a reaction mixture, obtainable via mixing of (a) organic polyisocyanates with (b) at least one compound having at least two reactive hydrogen atoms, (c) chain extenders and/or crosslinking agents, (d) blowing agents, (e) catalysts, (f) hyperbranched polymers, and (g) if appropriate, other auxiliaries and/or additives, into a mold, comprising rubber, and also to a process for production of these composite materials, and to the use of these composite materials as shoe soles.

Abstract: The invention provides a molding producible by a process comprising the following steps: a) introduction of a foamable reactive resin into a support material and b) compressive deformation of the support material comprising the foamable reactive resin.