Hydrolysis resistant organomodified disiloxane surfactants
View Patent ↗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: R 13 (C 2 H 4 O) a (C 3 H 6 O) b (C 4 H 8 O) c R 14 and R 12 SiR 5 R 6 (R 13 (C 2 H 4 O) a (C 3 H 6 O) b (C 4 H 8 O) c R 14 ) that exhibit resistance to hydrolysis over a wide pH range.
1. A silicone composition comprising a silicone having the formula:
MM′
where
M=R 1 R 2 R 3 SiO 1/2 ;
M′=R 4 R 5 R 6 SiO 1/2 ;
wherein R 1 is R 7 where R 7 has the formula R 8 R 9 R 10 SiR 12 with R 8 , R 9 , and R 10 each being methyl, and R 12 is a divalent hydrocarbon radical having 2 carbon atoms,
R 2 and R 3 are each independently selected from the group of from 1 to 6 carbon atom monovalent hydrocarbon radicals or R 1 , with R 4 being an alkylpolyalkyleneoxide bearing substituent selected from the group consisting of:
R 13 (C 2 H 4 O) a (C 3 H 6 O) b (C 4 H 8 O) c R 14 and
R 12 SiR 5 R 6 (R 13 (C 2 H 4 O) a (C 3 H 6 O) b (C 4 H 8 O) c R 14 )
where R 13 is a divalent linear or branched hydrocarbon radical having the structure:
—CH 2 —CH(R 15 )(R 16 ) d O—
where R 15 is H or methyl; R 16 is a divalent alkyl radical of 1 to 6 carbons where the subscript d is 0 or 1;
R 14 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 R 5 and R 6 are each independently selected from the group of monovalent hydrocarbon radicals having from 1 to 6 carbon atoms or R 4 .
2. The composition of claim 1 where R 15 is hydrogen.
3. The composition of claim 1 where R 2 is methyl.
4. The composition of claim 3 where R 15 is hydrogen.
5. A silicone composition comprising a silicone having the formula:
MM′
where
M=R 1 R 2 R 3 SiO 1/2 ;
M′=R 4 R 5 R 6 SiO 1/2 ;
wherein R 1 is R 7 where R 7 has the formula R 8 R 9 R 10 SiR 12 with R 8 , R 9 , and R 10 each being methyl, and R 12 is a divalent hydrocarbon radical having 2 carbon atoms,
R 2 and R 3 are each independently selected from the group of from 1 to 6 carbon atom monovalent hydrocarbon radicals or R 1 , with R 4 being an alkylpolyalkyleneoxide bearing substituent selected from the group consisting of:
R 13 (C 2 H 4 O) a (C 3 H 6 O) b (C 4 H 8 O) c R 14 and
R 12 SiR 5 R 6 (R 13 (C 2 H 4 O) a (C 3 H 6 O) b (C 4 H 8 O) c R 14 )
where R 13 is a divalent linear or branched hydrocarbon radical having the structure:
—CH 2 —CH(R 15 )(R 16 ) d O—
where R 15 is H or methyl; R 16 is a divalent alkyl radical of 1 to 6 carbons where the subscripted is 0 or 1;
R 14 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 R 5 and R 6 are each independently selected from the group of monovalent hydrocarbon radicals having from 1 to 6 carbon atoms or R 4 wherein said silicone composition has an enhanced resistance to hydrolysis.
6. The composition of claim 5 where R 15 is hydrogen.
7. The composition of claim 5 where R 2 is methyl.
8. The composition of claim 7 where R 15 is hydrogen.
9. An aqueous emulsion wherein the discontinuous phase comprises water and the continuous phase comprises the composition of claim 1 .
10. An aqueous emulsion wherein the discontinuous phase comprises water and the continuous phase comprises the composition of claim 5 .
11. An aqueous emulsion wherein the continuous phase comprises water and the discontinuous phase comprises the composition of claim 1 .
12. An aqueous emulsion wherein the continuous phase comprises water and the discontinuous phase comprises the composition of claim 5 .
13. A non-aqueous emulsion wherein the discontinuous phase comprises a non-aqueous hydroxylic solvent and the continuous phase comprises the composition of claim 1 .
14. A non-aqueous emulsion wherein the discontinuous phase comprises a non-aqueous hydroxylic solvent and the continuous phase comprises the composition of claim 5 .
15. A non-aqueous emulsion wherein the continuous phase comprises a non-aqueous hydroxylic solvent and the discontinuous phase comprises the composition of claim 1 .
16. A non-aqueous emulsion wherein the continuous phase comprises a non-aqueous hydroxylic solvent and the discontinuous phase comprises the composition of claim 5 .