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US 2014/0212368 A1Published application
Amphiphilic Organopolysiloxane Dendrimers With High Refractive Index
AssigneeWacker Chemical Corporation
InventorsAroop K. Roy, Amitabha Mitra, Michael L. Coffey
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Abstract
Branched organopolysiloxanes of low molecular weight contain bonded arylalkyl groups. Si—C bonded surfactant groups, preferably polyoxyalkylene polyether groups, and long chain alkyl groups, exhibit a high refractive index, are completely or partially self-emulsifying, and are compatible with a variety of cosmetically acceptable oils and solvents.
Claims21
A liquid or solid branched organopolysiloxane of the formula
- MaTbQc
- where a is at least 3, b is 0-4, and c is 0-2;
- where M is a monovalent siloxy unit of the formula
- ReR1fR2gR3hSiO(4−(e+f+g+h))/2
- where e, f, g, and h are individually integers from 0 to 3 and the sum (e+f+g+h) equals 3;
- R is a lower alkyl group or an aryl group,
- R1 is an arylalkyl group
- R2 comprises an alkylene-bonded surfactant group selected from the group consisting of polyoxyalkylene polyethers, polyhydroxyl compounds, and saccharides,
- R3 is a long chain alkyl group;
- where T is a trivalent siloxy unit of the formula
- Re′R1f′R2g′R3h′SiO(4−(e′+f′+g′+h′))/2
- where the sum (e′+f+g′+h′) is 1;
- where Q units are of the formula SiO4/2,
- with the proviso that the refractive index of the organopolysiloxane or dendrimer is ≧1.45, and the organopolysiloxane or dendrimer is self-emulsifyable in water at 10% by weight relative to the total weight of water and organopolysiloxane or dendrimer, and the organopolysiloxane or dendrimer contains at least one of each of R1, R2, and R3.
11 more elements
Dependencies are inferred from the claim text.