Wacker Chemie Ag

Gerhard Beer

Holger Rautschek

Christof Brehm

Markus Merget

Ernst Selbertinger

Markus Grandl

Werner Limmer

Claudius Schwarzwaelder

Claudius SCHWARZWÄLDER

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.

Aqueous emulsions of carbamato-functionalized organopolysiloxanes

The invention relates to a novel cosmetic composition, containing, in a cosmetically acceptable medium, at least one hair conditioning agent and at least one aqueous dispersion of pre-cross-linked organopolysiloxanes composed of units of general formula (I), wherein R means a monovalent, saturated or unsaturated hydrocarbon group having 1 to 200 carbon atoms per group, which hydrocarbon group can contain one or more heteroatoms from the group N, P, S, O, and halogen, Rmeans a hydrogen atom or an alkyl group having 1 to 8 carbon atoms per group, Rmeans a monovalent, optionally substituted hydrocarbon group having 1 to 18 carbon atoms per group, AKT is a group of the formula &#x2014;CHNHR, &#x2014;CH2NR, or formula (II), wherein Rmeans a monovalent hydrocarbon group having 1 to 18 carbon atoms, which hydrocarbon group can contain one or more heteroatoms from the group N and O, and Rmeans a divalent hydrocarbon group having 3 to 12 carbon atoms, which hydrocarbon group can contain one or more heteroatoms from the group N and O, b is 0.1 or 2, c is 0.1, 2, or 3, d is 0.1 or 2, and n is 0.1 or 2, with the stipulation that the sum n+b+c+d is &#x2266;3, that at least one AKT group is contained per molecule on average, and that the organopolysiloxanes preferably form elastomeric films after the water is removed.  

Cosmetic compositions

Aqueous emulsions of high viscosity organopolysiloxanes can be prepared having a very low content of cyclic siloxanes by condensing low molecular weight alkoxy-functional organopolysiloxanes in aqueous emulsion with an alkylphosphate emulsifier and at least one selected polyoxyethylene non-ionic surfactant.

Growing community of inventors

Burghausen, Germany

Gerhard Beer