Evonik Degussa Gmbh

Evonik Goldschmidt Corporation

Goldschmidt Gmbh

Evonik Operations Gmbh

Ruediger Landers

Wilfried Knott

Dagmar Windbiel

Matthias Naumann

Roland Hubel

Christian Eilbracht

Berend-Jan De Gans

Carsten Schiller

Annegret Terheiden

Described are a method of producing polyurethane foam comprising polyolefin-based polyols by using an additive composition comprising at least one ionic surfactant A selected from ionic surfactants of formula AM, where A=anion selected from the group consisting of alkyl sulphates, aryl sulphates, sulphonates, polyether sulphates, polyether sulphonates, alkyl sulphonates, aryl sulphonates, alkyl carboxylates, aryl carboxylates, saccharinates and polyether phosphates, and M=cation, and/or at least one ionic surfactant B selected from a quaternized ammonium compound, and also at least a tertiary amine compound C having a molar mass of at least 150 g/mol, and/or an oxazasilinane D, and also polyurethane foams thus obtained and their use.

Production of polyurethane foams comprising polyolefin-based polyols

The object of the invention is a method for producing polyurethane and/or polyisocyanurate insulating foam based on foaming reaction mixtures containing polyisocyanates, compounds having reactive hydrogen atoms, propellants, stabilizers, nucleation agents, and optionally further additives, which is characterized in that porous solids, in particular silicates having a zeolite structure, are used as the nucleation agents.

Method for producing polyurethane insulating foams

The subject matter of the present invention relates to a low-viscosity aqueous hot-cure flexible polyurethane foam stabilizer solution which can be used in the production of hot-cure flexible polyurethane foams, wherein the low-viscosity aqueous hot-cure flexible polyurethane foam stabilizer solution comprises the following components: &#x2267;40% to &#x2266;70% by weight of polyethersiloxane, &#x2267;0.5% to &#x2266;20% by weight of organic surfactant, &#x2267;10% by weight of water, &#x2267;0% by weight of organic solvent additions, in which the polyethersiloxane has the following formula (I) &#x2014;R&#x2014;Si(CH)O&#x2014;[Si(CH)(OSi(CH)R)O&#x2014;]&#x2014;[Si(OSi(CH)R)O&#x2014;]&#x2014;[Si(CH)O&#x2014;]&#x2014;[SiCHRO&#x2014;]&#x2014;[SiCHRO&#x2014;]&#x2014;[SiCHRO]&#x2014;[SiRRO]&#x2014;Si(CH)&#x2014;R(I).

Use of low-viscosity aqueous hot-cure flexible polyurethane foam stabilizer solutions containing polyethersiloxanes in the production of hot-cure flexible polyurethane foams

The invention therefore relates to a process for preparation of SiOC-linked, linear (AB)polydimethylsiloxane-polyoxyalkylene block copolymers of the general formula [(RSiO)(CHO)], in which

Process for preparation of SiOC-linked, linear polydimethylsiloxane-polyoxyalkylene block copolymers

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Essen, Germany

Ruediger Landers