Abstract: An aqueous dispersion includes precrosslinked organopolysiloxanes, emulsifiers, and water. The precrosslinked organopolysiloxanes include units of the formula R2SiO2/2 (I), and on average at least one structural unit of the formula SiR1O2/2—Y—SiR1O2/2 (III) where Y is a divalent radical of the formula —R2—[NR3—R4—]nNR3—C(O)—C(O)—NR3—Z—NR3—C(O)—C(O)—NR3—[R4—NR3—]nR2—.

Abstract: 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 SiRO2/2—Y—SiRO2/2 and units of the formula R2SiO2/2. Where Y is a radical of the formula —R2—[NR3—R4—]x—NR3—OC—[C(Z1)(H)]k1—[C(Z2)(H)]k2—CO—NR3—[R4—NR]x—R2 and where R, R2, R3, R4, k1, k2, x, Z1 and Z2 have a definition a set forth within herein. Additionally, the sum of k1+k2 is ?1, the that at least one radical Z1 or Z2 is a hydroxyl or NHR3 group, preferably a hydroxyl group, and so the bridging group Y contains at least one hydroxyl or NHR3 group, preferably at least one hydroxyl group.

Abstract: In an additive 3D printing method for production of shaped articles from silicone elastomers, an elastomeric shaped body is built up step by step, by repeatedly precisely positioning portions of the crosslinkable silicone material and crosslinking by means of electromagnetic radiation. Charges that occur on the surface of the print material or on the article are neutralized by means of an ionization system.

Abstract: Curable silicone rubber compositions of high viscosity can be ballistically printed if the melt flow index is within a defined shear thinning range and the viscosity is also within a defined range.

Abstract: Complex shaped bodies of silicone are produced by ballistic 3D DOD printing by employing a silicone resin-based composition curable by hydrosilylation, which exhibits a high shear thinning behavior and a rapid viscosity recovery rate alter removal of shear.

Abstract: Silicon elastomer articles are prepared by a 3-D printing process by depositing droplets of high viscosity curable silicone onto a substrate layer by layer from independently spatially controllable nozzles and irradiation with independently spatially controllable electromagnetic energy.

Abstract: 3D printing of curable silicone cam positions is made possible by employing a mixture of Si—H-functional silicon compounds and silicon compounds bearing aliphatically unsaturated groups, a hydrosilylation catalyst, and a combination of a reinforcing filler and a rheological agent containing polar groups, exhibiting shear thinning behavior.

Abstract: Nanoemulsions are prepared by: a) solubilizing a silicone resin in an organic solvent system to yield a silicone resin solution concentration of about 80% or less, wherein the organic solvent system comprises a single solvent selected from the group consisting of monoalcohols, polyalcohols, ethers of monoalcohols, ethers of polyalcohols, fatty esters, Guerbet alcohols, isoparaffins, naphthols, glycol ethers, provided that the solvent is not diethyleneglycol monobutyl ether; b) mixing the silicone resin solution with an aminosiloxane polymer to obtain an aminosiloxane polymer:silicone resin mixture having ratio of about 20:1; c) allowing the resin mixture to age for at least about 6 hours at ambient temperature; d) adding the resin mixture to a vessel; e) optionally adding with agitation, an additional organic solvent to the resin mixture; f) mixing until homogenous; g) adding a protonating agent; h) additionally adding an aqueous carrier in an amount to produce the desired concentration of emulsion.

Abstract: In an additive 3D printing method for production of shaped articles from silicone elastomers, an elastomeric shaped body is built up step by step, by repeatedly precisely positioning portions of the crosslinkable silicone material and crosslinking by means of electromagnetic radiation. Charges that occur on the surface of the print material or on the article are neutralized by means of an ionization system.

Abstract: Nanoemulsions are prepared by: a) solubilizing a silicone resin in an organic solvent system to yield a silicone resin solution concentration of 80% or less, wherein the organic solvent system comprises diethyleneglycol monobutyl ether and at least one additional solvent; b) mixing the silicone resin solution from a) with an aminosiloxane polymer to obtain an aminosiloxane polymer: silicone resin mixture; c) allowing the resin mixture to age for at least about 6 hours at ambient temperature; d) adding the resin mixture to a vessel; e) optionally adding with agitation an additional organic solvent to the resin mixture; f) mixing until homogenous; g) adding a protonating agent; h) adding an aqueous carrier in an amount to produce a desired concentration of emulsion.

Abstract: Complex shaped bodies of silicone are produced by ballistic 3D DOD printing by employing a silicone resin-based composition curable by hydrosilylation, which exhibits a high shear thinning behavior and a rapid viscosity recovery rate alter removal of shear.

Abstract: Curable silicone rubber compositions of high viscosity can be ballistically printed if the melt flow index is within a defined shear thinning range and the viscosity is also within a defined range.

Abstract: 3D printing of curable silicone cam positions is made possible by employing a mixture of Si—H-functional silicon compounds and silicon compounds bearing aliphatically unsaturated groups, a hydrosilylation catalyst, and a combination of a reinforcing filler and a rheological agent containing polar groups, exhibiting shear thinning behavior.

Abstract: Silicon elastomer articles are prepared by a 3-D printing process by depositing droplets of high viscosity curable silicone onto a substrate layer by layer from independently spatially controllable nozzles and irradiation with independently spatially controllable electromagnetic energy.

Abstract: Nanoemulsions are prepared by: a) solubilizing a silicone resin in an organic solvent system to yield a silicone resin solution concentration of 80% or less, wherein the organic solvent system comprises diethyleneglycol monobutyl ether and at least one additional solvent; b) mixing the silicone resin solution from a) with an aminosiloxane polymer to obtain an aminosiloxane polymer: silicone resin mixture; c) allowing the resin mixture to age for at least about 6 hours at ambient temperature; d) adding the resin mixture to a vessel; e) optionally adding with agitation an additional organic solvent to the resin mixture; f) mixing until homogenous; g) adding a protonating agent; h) adding an aqueous carrier in an amount to produce a desired concentration of emulsion.

Abstract: Nanoemulsions are prepared by: a) solubilizing a silicone resin in an organic solvent system to yield a silicone resin solution concentration of about 80% or less, wherein the organic solvent system comprises a single solvent selected from the group consisting of monoalcohols, polyalcohols, ethers of monoalcohols, ethers of polyalcohols, fatty esters, Guerbet alcohols, isoparaffins, naphthols, glycol ethers, provided that the solvent is not diethyleneglycol monobutyl ether; b) mixing the silicone resin solution with an aminosiloxane polymer to obtain an aminosiloxane polymer:silicone resin mixture having ratio of about 20:1; c) allowing the resin mixture to age for at least about 6 hours at ambient temperature; d) adding the resin mixture to a vessel; e) optionally adding with agitation, an additional organic solvent to the resin mixture; f) mixing until homogenous; g) adding a protonating agent; h) additionally adding an aqueous carrier in an amount to produce the desired concentration of emulsion.

Abstract: Amino group-containing organosilicon compounds containing no or only a small fraction of Si-bonded hydroxyl groups are prepared by preparing an organosilicon compound containing amino groups and Si-bonded hydroxyl groups by equilibration in the presence of an equilibration catalyst, and reacting the resultant product with a cyclic silazane. The products are particularly useful as a monomer or macromere for the preparation of high molecular weight organic polymers containing organosilicon blocks.

Abstract: Amino group-containing organosilicon compounds containing no or only a small fraction of Si-bonded hydroxyl groups are prepared by preparing an organosilicon compound containing amino groups and Si-bonded hydroxyl groups by equilibration in the presence of an equilibration catalyst, and reacting the resultant product with a cyclic silazane. The products are particularly useful as a monomer or macromere for the preparation of high molecular weight organic polymers containing organosilicon blocks.

Abstract: Organopolysiloxane/polyuria/polyurethane block copolymers containing a compatible UV stabilizer are transparent and resistant to degradation.

Abstract: Non-blocking polymer pellets are produced in spherical or nearly spherical form by introducing molten polymer directly from a polymerization reactor into a coolant and pelletizing just prior to, simultaneously with, or immediately following entry into the coolant such that residual heat allows the polymer pellets to change their shape to eliminate sharp corners, particularly cylindrical shapes, and assume a spherical-type morphology.