Wacker Chemie Ag

Werner Limmer

Gerhard Beer

Christof Brehm

Ernst Selbertinger

Markus Grandl

An aqueous of pre-crosslinked organopolysiloxanes and process for producing the same. The aqueous dispersion is preferably aqueous emulsion, including pre-crosslinked organopolysiloxanes which contains on average at least one structural unit of the general formula SiRO—Y—SiROand units of the formula RSiO. Where Y is a radical of the formula—R—[NR—R—]—NR—OC—[C(Z)(H)]—[C(Z)(H)]—CO—NR—[R—NR]—Rand where R, R, R, R, k1, k2, x, Zand Zhave a definition a set forth within herein. Additionally, the sum of k1+k2 is ≥1, the that at least one radical Zor Zis a hydroxyl or NHRgroup, preferably a hydroxyl group, and so the bridging group Y contains at least one hydroxyl or NHRgroup, preferably at least one hydroxyl group.

Aqueous dispersions of pre-crosslinked organopolysiloxanes

Aqueous nanoemulsions of carbamato-functional organopolysiloxanes prepared using a polyoxyethylene emulsifier having an HLB greater than 15 and at least 40 oxyethylene moieties and having a Dparticle size &#x2264;100 nm are transparent, stable, and useful in cosmetic compositions, particularly hair care compositions.

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Pleiskirchen, Germany

Werner Limmer