Surfactants for manufacture of urethane foams

Claim 1

A composition of matter having the generalized average formula M*D x D" y M* wherein M* represents (CH 3 ) 3 SiO 1/2 or R(CH 3 ) 2 SiO 1/2 ; D represents (CH 3 ) 2 SiO 2/2 ; D"represents (CH 3 )(R)SiO 2/2 ; x is 40-80; y is 5-20; and in the above formulae for M* and D", R is a polyether-containing substituent derived from a C n H 2 n--1-started polyether and is selected from the group consisting of: (1) --C n H 2n O(C 2 H 4 O) a (C 3 H 6 O) b R" moieties having average atomic masses in the range 1500-6000, and wherein n is 3-4; a is a number such that ethylene oxide residues constitute 30-50% by weight of the alkylene oxide residues of the polyether; b is a number such that propylene oxide residues constitute 70-50% by weight of the alkylene oxide residues of the polyether; R" represents H, an alkyl group of 1-4 carbon atoms, or --C(O)CH 3 ; and (2) --C n' H 2n' O(C 2 H 4 O) a' (C 3 H 6 O) b' R" moieties having average atomic masses in the range 300-750, and wherein n' is 3-4; a' is 0 to a number such that ethylene oxide residues constitute 100% by weight of the alkylene oxide residues of the polyether; and b' is 0 to a number such that propylene oxide residues constitute 100% by weight of the alkylene oxide residues of the polyether; with the proviso that at least one of a' and b' must be finite; and R" is as defined above; and with the further provisos that the composition M*D x D" y M* contains polyether-containing substituents R having average atomic masses in the range 1500-6000 and polyether-containing substituents R having average atomic masses in the range 300-750, and that the overall average atomic mass of the C n H 2n-1 -started polyethers from which the polyether-containing substituents R in the composition M*D x D" y M* are derived is in the range 1000-1800.

Claim 14

A method of preparing polyurethane foam, which comprises the steps of: (1) preparing a mixture comprising: (a) a polyether polyol containing an average of more than 2 hydroxyl groups per molecule; (b) an organic diisocyanate; (c) at least one catalyst for production of polyurethane foam; (d) a blowing agent; and (e) a siloxane-oxyalkylene copolymer having the generalized average formula M*D x D" y M* wherein M* represents (CH 3 ) 3 SiO 1/2 or R(CH 3 ) 2 SiO 1/2 ; D represents (CH 3 ) 2 SiO 2/2 ; D" represents (CH 3 )(R)SiO 2/2 ; x is 40-80; y is 5-20; and in the above formulae for M* and D", R is a polyether-containing substituent derived from a C n H 2n-1 -started polyether and is selected from the group consisting of: (1) --C n H 2n O(C 2 H 4 O) a (C 3 H 6 O) b R" moieties having average atomic masses in the range 1500-6000, and wherein n is 3-4; a is a number such that ethylene oxide residues constitute 30-50% by weight of the alkylene oxide residues of the polyether; b is a number such that propylene oxide residues constitute 70-50% by weight of the alkylene oxide residues of the polyether; R" represents H, an alkyl group of 1-4 carbon atoms, or --C(O)CH 3 ; and (2) --C n' H 2n' O(C 2 H 4 O) a' (C 3 H 6 O) b' R" moieties having average atomic masses in the range 300-750, and wherein n' is 3-4; a' is 0 to a number such that ethylene oxide residues constitute 100% by weight of the alkylene oxide residues of the polyether; and b' is 0 to a number such that propylene oxide residues constitute 100% by weight of the alkylene oxide residues of the polyether; with the proviso that at least one of a' and b' must be finite; and R" is as defined above; and with the further provisos that the composition M*D x D" y M* contains polyether-containing substituents R having average atomic masses in the range 1500-6000 and polyether-containing substituents R having average atomic masses in the range 300-750, and that the overall average atomic mass of the C n H 2n-1 -started polyethers from which the polyether-containing substituents R in the composition M*D x D" y M* are derived is in the range 1000-1800; (2) allowing the mixture to foam; and (3) curing the foamed composition.

Claim 15

A method of preparing polyurethane foam, which comprises the steps of: (1) preparing a mixture comprising: (a) a polyether polyol containing an average of more than 2 hydroxyl groups per molecule; (b) an organic diisocyanate; (c) at least one catalyst for production of polyurethane foam; (d) a blowing agent; and (e) a siloxane-oxyalkylene copolymer having the generalized average formula M*D x D" y M* wherein M* represents (CH 3 ) 3 SiO 1/2 or R(CH 3 ) 2 SiO 1/2 ; D represents (CH 3 ) 2 SiO 2/2 ; D" represents (CH 3 )(R)SiO 2/2 ; x is 40-80; y is 5-20; and in the above formulae for M* and D", R is a polyether-containing substituent derived from a C n H 2n-1 -started polyether and is selected from the group consisting of: (1) --C n H 2n O(C 2 H 4 O) a (C 3 H 6 O) b R" moieties having average atomic masses in the range 1500-6000, and wherein n is 3-4; a is a number such that ethylene oxide residues constitute 30-50% by weight of the alkylene oxide residues of the polyether; b is a number such that propylene oxide residues constitute 70-50% by weight of the alkylene oxide residues of the polyether; R" represents H, an alkyl group of 1-4 carbon atoms, or --C(O)CH 3 ; and (2) --C n' H 2n' O(C 2 H 4 O) a' (C 3 H 6 O) b' R" moieties having average atomic masses in the range 300-750, and wherein n' is 3-4; a' is 0 to a number such that ethylene oxide residues constitute 100% by weight of the alkylene oxide residues of the polyether; and b' is 0 to a number such that propylene oxide residues constitute 100% by weight of the alkylene oxide residues of the polyether; with the proviso that at least one of a' and b' must be finite; and R" is as defined above; and with the further provisos that the composition M*D x D" y M* contains polyether-containing substituents R having average atomic masses in the range 1500-6000 and polyether-containing substituents R having average atomic masses in the range 300-750, and that the overall average atomic mass of the C n H 2n-1 -started polyethers from which the polyether-containing substituents R in the composition M*D x D" y M* are derived is in the range 1000-1800; (2) allowing the mixture to foam; and (3) curing the foamed composition.