Method of using personal and home care compositions containing a sol-gel derived material
Disclosed is a method for removing fatty oil from a surface containing the fatty oil comprising the steps of applying to the surface containing the fatty oil a composition comprising a sol-gel derived material, the sol-gel derived material including a plurality of alkylsiloxy substituents and the sol-gel derived material obtained from (a) at least one first alkoxysilane precursor having the formula: (R′O) 3 —Si—(CH 2 ) n —Ar—(CH 2 ) m —Si—(OR′) 3 (1) where n and m are individually an integer from 1 to 8, Ar is a single-, fused-, or poly-aromatic ring, and each R′ is independently a C 1 to C 5 alkyl group and (b) optionally, at least one second precursor having the formula: where x is 1, 2, 3 or 4; y is 0, 1, 2, 3; z is 0, 1; the total of x+y+z is 4; each R is independently an organic functional group; each an R′ is independently a C 1 to C 5 alkyl group and R″ is an organic bridging group and then moving the composition from the surface to remove the fatty oil.
1. A method of making a sol-gel derived material, the method comprising:
combining
(a) at least one first alkoxysilane precursor having a formula:
(R′O) 3 —Si—(CH 2 ) n —Ar—(CH 2 ) m —Si—(OR′) 3
where n and m are individually an integer from 1 to 8, Ar is a single-, fused-, or poly-aromatic ring, and each R′ is independently a C 1 to C 5 alkyl group; and
(b) at least one second alkoxysilane precursor having a formula:
where x is 1; y is 2 or 3; z is 0 or 1; the total of x+y+z is 4; each R is independently an organic functional group, each an R′ is independently a C 1 to C 5 alkyl group and R″ is an organic bridging group; and
(c) a solvent, to form an alkoxysilane precursor reaction medium; and
catalyzing hydrolysis and condensation of the alkoxysilane precursors by adding to the reaction medium a catalytic solution comprising a catalyst and water,
thereby obtaining the sol-gel derived material.
2. The method of claim 1 , wherein the catalyst is a base catalyst.
3. The method of claim 2 , wherein the base catalyst is selected from tetrabutylammonium fluoride (TBAF), potassium fluoride, 1,5-diazabicyclo[4.3.0]non-5-ene (DBN), and propylamines.
4. The method of claim 3 , wherein the base catalyst is TBAF.
5. The method of claim 4 , wherein the TBAF is present in the catalytic solution at a concentration of about 0.00001 to about 0.002 M.
6. The method of claim 4 , wherein the TBAF is present in the catalytic solution at a concentration of about 0.001 to about 0.01 M.
7. The method of claim 1 , further comprising, after formation of the sol-gel derived material, aging the reaction product.
8. The method of claim 7 , further comprising rinsing during or after the aging process, to provide a sol-gel derived material characterized by residual silanol groups.
9. The method of claim 8 , further comprising reacting the residual silanol groups with a derivatization reagent, resulting in end-capped silanol groups.
10. The method of claim 9 , wherein the derivatization reagent is selected from halosilanes, silazanes, and disilazanes.
11. The method of claim 1 , wherein y is 2 and z is 1, and R′ is a methyl, ethyl, or propyl group.
12. The method of claim 1 , wherein R comprises an unsubstituted or substituted straight-chain hydrocarbon group, branched-chain hydrocarbon group, cyclic hydrocarbon group, or aromatic hydrocarbon group.
13. The method of claim 1 , wherein the plurality of alkylsiloxy groups have the formula:
—(O) w —Si—(R 1 ) 4-w
where each R 1 is independently an organic group as described above and w is an integer from 1 to 3.
14. The method of claim 1 wherein the at least one first alkoxysilane precursor comprises a bis(trialkoxysilylalkyl)benzene.
15. The method of claim 14 where the at least one first alkoxysilane precursor comprises 1,4-bis(trimethoxysilylmethyl)benzene (BTMB), bis(triethoxysilylethyl)benzene (BTEB), or mixtures thereof.
16. A method of making a sol-gel derived material, the method comprising:
combining
(a) at least one first alkoxysilane precursor having a formula:
(R′O) 3 —Si—(CH 2 ) n —Ar—(CH 2 ) m —Si—(OR′) 3
where
n and m are individually an integer from 1 to 8, Ar is a single-, fused-, or poly-aromatic ring, and each R′ is independently a C 1 to C 5 alkyl group; and
(b) at least one second alkoxysilane precursor having a formula:
where x is 1; y is 2 or 3; z is 0 or 1; the total of x+y+z is 4; each R is independently an organic functional group, each an R′ is independently a C 1 to C 5 alkyl group and R″ is an organic bridging group; and
(c) a solvent, to form an alkoxysilane precursor reaction medium; and
catalyzing hydrolysis and condensation of the alkoxysilane precursors by adding to the reaction medium a catalytic solution comprising a base catalyst and water, thereby obtaining a reaction product;
aging the reaction product
thereby obtaining a sol-gel derived material having residual silanol groups; and
reacting the residual silanol groups with a derivatization reagent, thereby obtaining a sol-gel derived material having end-capped silanol groups.
17. The method of claim 16 , wherein the base catalyst is tetrabutylammonium fluoride (TBAF).
18. The method of claim 16 , wherein y is 2 and z is 1, and R′ is a methyl, ethyl, or propyl group.
19. The method of claim 16 , wherein R comprises an unsubstituted or substituted straight-chain hydrocarbon group, branched-chain hydrocarbon group, cyclic hydrocarbon group, or aromatic hydrocarbon group.
20. The method of claim 16 , further comprising rinsing the reaction product during or after the aging process and before reacting the residual silanol groups with the derivatization reagent.