A curable composition containing an alkoxysilylalkylaminopropyl-modified polysiloxane compound of the following general formula (1) and a hydrolyzable group-containing organosilicon compound:

##STR00001##

wherein R.sup.1s each independently represent a substituted or unsubstituted monovalent hydrocarbon group having 1 to 10 carbon atoms, R.sup.2 and R.sup.3 each independently represent an unsubstituted monovalent hydrocarbon group having 1 to 6 carbon atoms, R.sup.4 represents a divalent hydrocarbon group having 1 to 20 carbon atoms, which may contain a sulfur atom, a silicon atom, an ester bond or a urea bond, p is an integer of 1 to 1000, q is 0 or 1, r is 0, 1 or 2, and X represents a group of the following general formula (2) or R.sup.1.sub.3Si:

##STR00002##

wherein R.sup.2 to R.sup.4, q and r represent the same meaning as described above.

A curable composition containing an alkoxysilylalkylaminopropyl-modified polysiloxane compound of the following general formula (1) and a hydrolyzable group-containing organosilicon compound:

##STR00001##

wherein R.sup.1s each independently represent a substituted or unsubstituted monovalent hydrocarbon group having 1 to 10 carbon atoms, R.sup.2 and R.sup.3 each independently represent an unsubstituted monovalent hydrocarbon group having 1 to 6 carbon atoms, R.sup.4 represents a divalent hydrocarbon group having 1 to 20 carbon atoms, which may contain a sulfur atom, a silicon atom, an ester bond or a urea bond, p is an integer of 1 to 1000, q is 0 or 1, r is 0, 1 or 2, and X represents a group of the following general formula (2) or R.sup.1.sub.3Si:

##STR00002##

wherein R.sup.2 to R.sup.4, q and r represent the same meaning as described above.

Modified poly(diorganosiloxanes), compositions, and articles comprising the same. The modified poly(diorganosiloxanes) can be soluble or dispersable in aqueous media. The articles can have modified poly(diorganosiloxanes) affixed thereto.

Modified poly(diorganosiloxanes), compositions, and articles comprising the same. The modified poly(diorganosiloxanes) can be soluble or dispersable in aqueous media. The articles can have modified poly(diorganosiloxanes) affixed thereto.

Particles are prepared in an emulsion using a method that includes providing a first reactant having at least two unsaturated carbon-carbon moieties and a second reactant having at least two Si—H moieties, so long as at least one of the unsaturated carbon-carbon moieties of the first reactant or the Si—H moieties of the second reactant is pendant. The method also includes providing a third reactant having a silicon atom and a condensable reactive group bonded to the silicon atom and also having an unsaturated carbon-carbon moiety and/or a Si—H moiety, providing a hydrosilylation catalyst, and providing a polar liquid. The method further includes combining the first, second, and third reactants to form particles that have a cross-linked network wherein the condensable reactive group is disposed on the particles, and adding a silane having an organic moiety and a condensation leaving group to form the particles.

Particles are prepared in an emulsion using a method that includes providing a first reactant having at least two unsaturated carbon-carbon moieties and a second reactant having at least two Si—H moieties, so long as at least one of the unsaturated carbon-carbon moieties of the first reactant or the Si—H moieties of the second reactant is pendant. The method also includes providing a third reactant having a silicon atom and a condensable reactive group bonded to the silicon atom and also having an unsaturated carbon-carbon moiety and/or a Si—H moiety, providing a hydrosilylation catalyst, and providing a polar liquid. The method further includes combining the first, second, and third reactants to form particles that have a cross-linked network wherein the condensable reactive group is disposed on the particles, and adding a silane having an organic moiety and a condensation leaving group to form the particles.

A functionalized siloxane includes a ligand capable of coordinating a metal. The functionalized siloxane includes a pyridine-containing ligand attached to a siloxane polymer. The functionalized siloxanes can be employed to provide complexes including a metal that may impart a desired property to the polymer. In one embodiment, the polymer can complex lanthanide metals that are capable of phosphorescing upon exposure to UV irradiation. Such polymers can be employed to provide functional materials such as, for example, luminescent films, coatings, etc.

A functionalized siloxane includes a ligand capable of coordinating a metal. The functionalized siloxane includes a pyridine-containing ligand attached to a siloxane polymer. The functionalized siloxanes can be employed to provide complexes including a metal that may impart a desired property to the polymer. In one embodiment, the polymer can complex lanthanide metals that are capable of phosphorescing upon exposure to UV irradiation. Such polymers can be employed to provide functional materials such as, for example, luminescent films, coatings, etc.

The present technology provides a nanoparticle that includes a silica network comprising crosslinked polysiloxanes, wherein the crosslinks comprise disulfide linkages, and the nanoparticle has a surface bearing charged functional groups and a surface potential of either less than −30 mV or greater than +30 mV, and wherein the nanoparticle has an average diameter of 20 nm to 60 n. The nanoparticles may be used to efficiently deliver biomolecules to plant cells, including polynucleic acids, proteins and complexes thereof (e.g., Cas9 RNP).

An organo(poly)siloxane (A) consists of units of general formula (I) R.sub.nSiO.sub.(4-n/2), where R is selected from the radicals R.sup.1, —OR.sup.2, R.sup.u, R.sup.S and Q, wherein R.sup.1 denotes a monovalent substituted or unsubstituted hydrocarbon radical having 1 to 18 carbon atoms, R.sup.2 denotes a hydrogen atom or a monovalent substituted or unsubstituted hydrocarbon radical having 1 to 6 carbon atoms, R.sup.u denotes a monovalent aliphatic unsaturated hydrocarbon radical having 2 to 18 carbon atoms, R.sup.S denotes a monovalent thiol-functionalized hydrocarbon radical, Q is a nitrogen functional group of formula (II) —CR.sup.5R.sup.6—NR.sup.4R.sup.3, where R.sup.3 and R.sup.4 each independently denote hydrogen or a substituted or unsubstituted hydrocarbon radical, and R.sup.5 and R.sup.6 each independently denote hydrogen or the methyl radical. The organo(poly)siloxane (A) contains per molecule at least one unit of general formula (III) Q-Si(OR.sup.7).sub.2O.sub.1/2, at least 1 aliphatically unsaturated radical R.sup.u, and at least 2 thiol-functionalized groups R.sup.S.