A hydrophilic silicone, compositions comprising the same, and articles comprising the same are shown and described herein. The hydrophilic silicone is an ionically modified silicone compound wherein the compound comprises a zwitterionic moiety and has a net neutral charge. The hydrophilic silicone compounds may be provided as part of a composition, e.g., a composition suitable for forming a hydrogel, which may be employed to form a film material and even an article (e.g., in a contact lens).

A hydrophilic silicone, compositions comprising the same, and articles comprising the same are shown and described herein. The hydrophilic silicone is an ionically modified silicone compound wherein the compound comprises a zwitterionic moiety and has a net neutral charge. The hydrophilic silicone compounds may be provided as part of a composition, e.g., a composition suitable for forming a hydrogel, which may be employed to form a film material and even an article (e.g., in a contact lens).

The present disclosure provides an aqueous binder composition for forming a sacrificial corrosion-protective coating, said composition being free of chromates and also preferably free of borates and molybdates. Said binder composition advantageously has a pH of less than 6 and comprises a binder, particles of at least one metal oxide and at least one metallic phosphate, said binder comprising a hydrolyzed organosilane oligomer. In addition, the proportion by weight of said particles of at least one metal oxide relative to the total dry weight of said binder composition is greater than or equal to 75%.

The present disclosure provides an aqueous binder composition for forming a sacrificial corrosion-protective coating, said composition being free of chromates and also preferably free of borates and molybdates. Said binder composition advantageously has a pH of less than 6 and comprises a binder, particles of at least one metal oxide and at least one metallic phosphate, said binder comprising a hydrolyzed organosilane oligomer. In addition, the proportion by weight of said particles of at least one metal oxide relative to the total dry weight of said binder composition is greater than or equal to 75%.

A curable organopolysiloxane composition is provided which forms a pressure sensitive adhesive (PSA) layer having a low storage elastic modulus (G), excellent curability, and sufficient adhesion, along with applications thereof. A PSA layer-forming organopolysiloxane composition comprises: (A) a chain organopolysiloxane having alkenyl groups; (B) an organopolysiloxane resin wherein the weight average molecular weight (Mw) thereof is less than 4500 and the sum of the content of hydroxyl groups, etc. is 9 mole % or less; (C) an organohydrogenpolysiloxane; and (D) a hydrosilylation reaction catalyst; and optionally, (A) a chain organopolysiloxane which does not contain a carbon-carbon double bond-containing reactive group in the molecule. The mass ratio of the organopolysiloxane resin (B) to the chain organopolysiloxane (A) is within a specific range and the shear storage elastic modulus G at ?20? C. of a PSA layer obtained by curing the composition is within a range of 0.01 to 1.0 MPa.

A curable organopolysiloxane composition is provided which forms a pressure sensitive adhesive (PSA) layer having a low storage elastic modulus (G), excellent curability, and sufficient adhesion, along with applications thereof. A PSA layer-forming organopolysiloxane composition comprises: (A) a chain organopolysiloxane having alkenyl groups; (B) an organopolysiloxane resin wherein the weight average molecular weight (Mw) thereof is less than 4500 and the sum of the content of hydroxyl groups, etc. is 9 mole % or less; (C) an organohydrogenpolysiloxane; and (D) a hydrosilylation reaction catalyst; and optionally, (A) a chain organopolysiloxane which does not contain a carbon-carbon double bond-containing reactive group in the molecule. The mass ratio of the organopolysiloxane resin (B) to the chain organopolysiloxane (A) is within a specific range and the shear storage elastic modulus G at ?20? C. of a PSA layer obtained by curing the composition is within a range of 0.01 to 1.0 MPa.

A photocurable composition can comprise a polymerizable material and a photoinitiator, wherein the polymerizable material may comprise at least one silicon-containing monomer having a structure of formula (1)

##STR00001##

with R1, R2: OSi(CH.sub.3).sub.3, alkyl, aryl, or alkylaryl; R3, R4: OSi(CH.sub.3).sub.3, alkyl, aryl, or alkylaryl; R5: C.sub.1-C.sub.5-alkyl, aryl, alkylaryl; R.sub.6: -R5-X, or X, or OSi(CH.sub.3).sub.3, or alkyl, or aryl, or alkylaryl; X: acrylate or methacrylate; and n: 0-4. The amount of silicon (Si) in the photocurable composition can be at least 15 wt % based on the total weight of the photocurable composition.

A photocurable composition can comprise a polymerizable material and a photoinitiator, wherein the polymerizable material may comprise at least one silicon-containing monomer having a structure of formula (1)

##STR00001##

with R1, R2: OSi(CH.sub.3).sub.3, alkyl, aryl, or alkylaryl; R3, R4: OSi(CH.sub.3).sub.3, alkyl, aryl, or alkylaryl; R5: C.sub.1-C.sub.5-alkyl, aryl, alkylaryl; R.sub.6: -R5-X, or X, or OSi(CH.sub.3).sub.3, or alkyl, or aryl, or alkylaryl; X: acrylate or methacrylate; and n: 0-4. The amount of silicon (Si) in the photocurable composition can be at least 15 wt % based on the total weight of the photocurable composition.

Matrix materials, such as sol-gels and polymers derivatives to contain a redox active material can be used to form electrodes and probes suitable for use in pH meters and other analyte sensing devices.

Matrix materials, such as sol-gels and polymers derivatives to contain a redox active material can be used to form electrodes and probes suitable for use in pH meters and other analyte sensing devices.