Silicone copolymers with pendant alkyl radicals attached via allyl glycidyl ether and related compounds, and use thereof as stabilizers for production of flexible polyurethane foams

A silicone copolymer of formula (I)

• where
• a is 1 to 178,
• b, c and d are each independently 0 to 177,
• the radicals R are each independently identical or different alkyl radicals,
• R1 in each occurrence is an oxygen-containing hydrocarbon radical and is the same or different,
• R2 in each occurrence is an oxygen-containing hydrocarbon radical and is the same or different,
• R3 is ═R3a and/or R3b,
• R3a is =—(CH2)z—O—CH2—CH[(CH2)1-g—(OR7)]—(CH2)g—O—R5,
• R3b is =—(CH2)z—O—CH2—C(CH2CH3)(CH2ORy)—CH2—O—CH2—R10,
• R5 in each occurrence is independently a saturated or unsaturated, optionally alkoxylated hydrocarbon radical, polyether moiety —(C2H4O)o—(C3H6O)p—(CH2—CHR′—O)q—R4 or a glycerol (partial) ester moiety of a glyceryl ester,
• where o, p and q are each independently 0 to 100 subject to the proviso that the sum total of o+p is in each case greater than 0,
• R4 in each occurrence is independently a hydrogen radical or an alkyl group of 1 to 4 carbon atoms, a —C(O)—R′″ group where R′″=alkyl, a —CH2—O—R′ group, an alkylaryl group, or a —C(O)NH—R′ group,
• R′ is an unsubstituted or optionally substituted, alkyl radicals, aryl radicals, halogens or haloalkyl or haloaryl radicals, alkyl or aryl radical having altogether 1 to 12 carbon atoms, and is the same or different,
• Rx in each occurrence is independently R1, R2, R3 or R,
• Ry in each occurrence is independently a hydrogen radical, alkyl, acyl or a polyether moiety —(C2H4O)o—(C3H6O)p—(CH2—CHR′—O)q—R4 where o, p, q, R4 and R′ are each as defined above,
• z in each occurrence is independently 2 to 4,
• R7═H, a polyether moiety —(C2H4O)o—(C3H6O)p—(CH2CHR′—O)q—R4 where o, p, q, R4 and R′ are each as defined above, or —(CH2)h—CH[(CH2)(1-h)(OR7′)]—CH2—O—CH2—R10,
• R7′═H, a polyether moiety —(C2H4O)o—(C3H6O)p—(CH2CHR′—O)q—R4 where o, p, q, R4 and R′ are each as defined above, or —(CH2)h—CH[(CH2)(1-h)(OR7′)]—CH2—O—CH2—R10,
• R7″═H, a polyether moiety —(C2H4O)o—(C3H6O)p—(CH2—CHR′—O)q—R4 where o, p, q, R4 and R′ are each as defined above, or —(CH2)h—CH[(CH2)(1-h)(OH)]—CH2—O—CH2—R10, g and h in each occurrence are 0 to 1 and the same or different,
• R10 in each occurrence is CH═CH2 or CH2—CH2—R9, and the same or different, and
• R9 in each occurrence is the same or different and is H or an R3′-attached siloxane moiety of formula (Ia)
• where a to d, R, Rx and R1 to R3 are each as defined for formula (I), subject to the proviso that the sum total of a+e in formula (Ia) is preferably 1,
• with the proviso that the sum total a+b+c+d per unit of formula (I) or (Ia) is 38 to 178 and the sum total of the attached units of formulae (Ia) per silicone copolymer of formula (I) does not exceed three.