The invention relates to the use of foam stabilizers, produced on the basis of sustainable raw materials, for prroducing polyurethane foams

Use of foam stabilizers of the general formula (I)

• in which
• n is 0-500,
• m is 1-60,
• o is 0-60,
• k is 0-10,
• R may be a linear, cyclic or branched, aliphatic or aromatic, saturated or unsaturated hydrocarbon radical having 1 to 20 C atoms, which may contain heteroatoms, such as oxygen, nitrogen, phosphorus or sulphur,
• R1 is R, R2 or R3,
• R2 is CH2—CH2—CH2—O—(CH2—CH2O—)x—(CH2—CH(R″)O—)y—C(O)R′, in which R′ represents the alkyl radical derived from monobasic fatty acids based on natural vegetable or animal oils having 6-30 carbon atoms, in particular having 8-22 carbon atoms, such as caproic acid, caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, palmitoleic acid, isostearic acid, stearic acid, 12-hydroxystearic acid, dihydroxystearic acid, oleic acid, linoleic acid, petroselinic acid, elaidic acid, arachidic acid, behenic acid, erucic acid, gadoleic acid, linolenic acid, eicosapentaenoic acid, docosahexaenoic acid, arachidonic acid, which can be used alone or as a mixture,
• R3 is CH2—CH2—CH2—O—(CH2—CH2O—)x—(CH2—CH(R′)O—)y—R′″,
• CH2—CH2—O—(CH2—CH2O—)x—(CH2—CH(R″)O—)y—R′″,
• CH2—CH2—CH2—O—(CH2—CH2O—)x—(CH2—CH(R″)O—)y—(SO)z—R′″,
• CH2—RIV,
• CH2—CH2—(O)x′—RIV,
• CH2—CH2—CH2—O—CH2—CH(OH)—CH2OH,
• CH2—CH2—CH2—O—CH2—C(CH2OH)2—CH2—CH3,
• in which
• x is 0 to 100,
• x′ is 0 or 1,
• y is 0 to 100,
• z is 0 to 100,
• R″ is an optionally substituted alkyl group having 1 to 4 C atoms and
• R′″ denotes a hydrogen radical or an alkyl group having 1 to 4 C atoms, the group —C(O)—R″, an alkylaryl group, such as the benzyl group;
• the group —C(O)NH—R′,
• RIV denotes an optionally substituted, optionally halogen-substituted, hydrocarbon radical having 1 to 50 C atoms.
• SO denotes the radical —CH(C6H5)—CH2—O—, for the preparation of polyurethane foams.