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US 7,652,072 B2Granted
Hydrolysis resistant organomodified disiloxane surfactants
AssigneeMomentive Performance Materials Inc.
InventorsMark D. Leatherman, George A. Policello, Suresh K. Rajaraman
Life of this patent
Estimating the term…
Abstract
Compositions comprising an asymmetric disiloxane surfactant composition comprising a silicone composition comprising a silicone having the formula: MM′ where M or M′ comprises an alkylpolyalkyleneoxide bearing substituent selected from the group consisting of: R13(C2H4O)a(C3H6O)b(C4H8O)cR14 and R12SiR5R6(R13(C2H4O)a(C3H6O)b(C4H8O)cR14) that exhibit resistance to hydrolysis over a wide pH range.
Claims16
A silicone composition comprising a silicone having the formula:
- MM′
- where
- M=R1R2R3SiO1/2;
- M′=R4R5R6SiO1/2;
- wherein R1 is R7 where R7 has the formula R8R9R10SiR12 with R8, R9, and R10 each being methyl, and R12 is a divalent hydrocarbon radical having 2 carbon atoms,
- R2 and R3 are each independently selected from the group of from 1 to 6 carbon atom monovalent hydrocarbon radicals or R1, with R4 being an alkylpolyalkyleneoxide bearing substituent selected from the group consisting of:
- R13(C2H4O)a(C3H6O)b(C4H8O)cR14 and
- R12SiR5R6(R13(C2H4O)a(C3H6O)b(C4H8O)cR14)
- where R13 is a divalent linear or branched hydrocarbon radical having the structure:
- —CH2—CH(R15)(R16)dO—
- where R15 is H or methyl;
- R16 is a divalent alkyl radical of 1 to 6 carbons where the subscript d is 0 or 1;
- R14 is selected from the group consisting of H, monovalent hydrocarbon radicals of from 1 to 6 carbon atoms and acetyl where the subscripts a, b and c are zero or positive and satisfy the following relationships:
- 2≦a+b+c≦20 with a≧2,
- and R5 and R6 are each independently selected from the group of monovalent hydrocarbon radicals having from 1 to 6 carbon atoms or R4.
12 more elements
A silicone composition comprising a silicone having the formula:
- MM′
- where
- M=R1R2R3SiO1/2;
- M′=R4R5R6SiO1/2;
- wherein R1 is R7 where R7 has the formula R8R9R10SiR12 with R8, R9, and R10 each being methyl, and R12 is a divalent hydrocarbon radical having 2 carbon atoms,
- R2 and R3 are each independently selected from the group of from 1 to 6 carbon atom monovalent hydrocarbon radicals or R1, with R4 being an alkylpolyalkyleneoxide bearing substituent selected from the group consisting of:
- R13(C2H4O)a(C3H6O)b(C4H8O)cR14 and
- R12SiR5R6(R13(C2H4O)a(C3H6O)b(C4H8O)cR14)
- where R13 is a divalent linear or branched hydrocarbon radical having the structure:
- —CH2—CH(R15)(R16)dO—
- where R15 is H or methyl;
- R16 is a divalent alkyl radical of 1 to 6 carbons where the subscripted is 0 or 1;
- R14 is selected from the group consisting of H, monovalent hydrocarbon radicals of from 1 to 6 carbon atoms and acetyl where the subscripts a, b and c are zero or positive and satisfy the following relationships:
- 2≦a+b+c≦20 with a≧2,
- and R5 and R6 are each independently selected from the group of monovalent hydrocarbon radicals having from 1 to 6 carbon atoms or R4 wherein said silicone composition has an enhanced resistance to hydrolysis.
12 more elements
Dependencies are inferred from the claim text.