The present invention relates to hydrogels prepared using silylated organic molecules (such as silylated biomolecules), a method for obtaining same, and uses thereof.

The present disclosure provides an aerogel precursor including an alkoxydisiloxane-based prepolymer and having a functional group derived from a hydrophobic sol-gel forming agent of the following Chemical Formula 1 on a surface thereof, and therefore, capable of enhancing high temperature thermal stability of an aerogel providing hydrophobic pores having uniform pore size distribution when preparing an aerogel, and an aerogel prepared using the same:

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(in Chemical Formula 1, M, R, R.sup.1 to R.sup.4 are the same as defined in the specification.)

A liquid crystal display device includes a liquid crystal panel; and a backlight unit disposed at one side of the liquid crystal panel. The backlight unit includes a prism sheet, which comprises a base and a plurality of prism patterns arranged on the base and a binder and a silicon compound having adjacent siloxane moieties linked via a diselenide group, and a light source disposed at a lower portion of the prism sheet. In the liquid crystal display device, the prism sheet is disposed between the light source and the liquid crystal panel.

Surface-modified nanoparticles are produced by associating ligand interactive agents with the surface of a nanoparticle. The ligand interactive agents are bound to surface modifying ligands that are tailored to impart particular solubility and/or compatibility properties. The ligand interactive agents are crosslinked via a linking/crosslinking agent, such as hexamethoxymethylmelamine or a derivative thereof. The linking/crosslinking agent may provide a binding site for binding the surface modifying ligands to the ligand interactive agents.

Organopolysiloxanes bearing regularly spaced pendent carboxylic acid groups or salts thereof have a block polymer structure and are derived by the double half-esterification of a dianhydride and a silanol- or carbinol-functional organopolysiloxane or sulfur analog thereof. The products can form stable aqueous dispersions without the need for a surfactant.

This disclosure relates to a silica support for a metallocene catalyst used for olefin polymerization, a preparation method thereof, a metallocene catalyst using the same, and olefin polymer. Specifically, according to the present invention, a silica support used for preparing a metallocene supported catalyst is treated with a specific halogenized metal compound, thereby diversifying reaction sites to a cocatalyst when preparing a metallocene catalyst, and thus, the molecular weight distribution of produced olefin polymer may be much broadened and polymer having high molecular weight may be obtained compared to the existing support, even if the same metallocene catalyst is supported.

A method of preparing an organosilanol compound is disclosed. The method comprises reacting (A) an initial organosilicon compound and (B) water in the presence of (C) a catalyst. The catalyst (C) is selected from: (C1) [(C.sub.8H.sub.12irCl].sub.2[(p-cymene)RuCl.sub.2].sub.2; and (C3) Pd/C. The initial organosilicon compound (A) has the general formula HOSi(R).sub.2[Si(R).sub.2O].sub.aOSi(R).sub.2Y and the organosilanol compound has the general formula HOSi(R)2-[Si(R).sub.2O].sub.aOSi(R).sub.2Y, where each R is an independently selected hydrocarbyl group; Y comprises a functional moiety selected from alkoxysilyl moieties, epoxide moieties, and acryloxy moieties, with the proviso that Y is other than the acryloxy moieties when the catalyst (C) is (C3) Pd/C; and subscript a is 0 or 1. The organosilanol compound prepared by the method is also provided.

A branched organosilicon compound is provided which has the general formula (R.sup.1)3SiXNR.sup.2X.sup.1NR.sup.22- In the formula: each R.sup.1 is selected from R and OSi(R.sup.4)3, with the proviso that at least one R.sup.1 is OSi(R.sup.4).sub.3; each R4 is selected from R, OSi(R5)3, and [OSiR2]mOSiR3; each R.sup.1 is selected from R, OSi(R.sup.6).sub.3, and [OSiR.sub.2].sub.mOSiR.sub.3; each R6 is selected from R and [OSiR.sub.2].sub.mOSiR.sub.3; with the proviso that at least one of R.sup.4, R.sup.1 and R6 is [OSiR.sub.2]mOSiR.sub.3; 0<m100. Each R is independently a substituted or unsubstituted hydrocarbyl group, e.g. a methyl group. Each of X and X.sup.1 is an independently selected divalent linking group, e.g. a divalent hydrocarbon linking group. Each R.sup.2 independently comprises a substituted or unsubstituted hydrocarbyl group, a polyether group, or H. At least one R.sup.2 comprises a polyether group. A method of preparing the branched organosilicon compound and a composition comprising the branched organosilicon compound are also provided.

A process for preparing an aldehyde-functional organosilicon compound comprises: 1) combining, under conditions to catalyze hydroformylation reaction, starting materials comprising (A) a gas comprising hydrogen and carbon monoxide, (B) a vinyl-functional organosilicon compound, and (C) a rhodium/ligand complex catalyst.