The invention relates to polysiloxanes which can be obtained by adding at least one monovinyl functional polysiloxane and at least one epoxy functional, monovinyl functional component to a Si—H functional polysiloxane. The invention also relates to the production of polysiloxanes, to compositions containing said polysiloxanes, to the use of the compositions in a coating method and to substrates coated with the composition and to the use of the polysiloxanes as additives for finishing surfaces of hardened compositions with anti-adhesive properties.

A rubber composition for a tire containing a cyclopentene ring-opening polymer and a solution polymerized styrene-butadiene rubber. The rubber composition is a cross-linked rubber with excellent wet grip and low heat buildup properties.

Disclosed herein is a composition comprising a brush polymer; where the brush polymer comprises a reactive moiety that is reacted to a substrate upon which it is disposed; and a block copolymer; where the block copolymer comprises a first block and a second block that are covalently bonded to each other; where the first block comprises a first polymer and a second block comprises a second polymer; where the first polymer comprises less than or equal to 10 atomic percent polysiloxane; where the second polymer comprises at least 15 atomic percent polysiloxane; where the brush polymer is chemically different from the first polymer and the second polymer; and where the first polymer is chemically different from the second polymer; and wherein the block copolymer is disposed upon the brush polymer.

A silicone pressure sensitive adhesive with amphiphilic copolymers for maintaining adhesion in a moist environment. The amphiphilic copolymers for silicone adhesives include at least one silicone moiety and at least one hydrophilic segment. Such adhesives are applicable to securing medical devices to human skin.

A silicone pressure sensitive adhesive with amphiphilic copolymers for maintaining adhesion in a moist environment. The amphiphilic copolymers for silicone adhesives include at least one silicone moiety and at least one hydrophilic segment. Such adhesives are applicable to securing medical devices to human skin.

Articles comprising a polymer composition, wherein the polymer composition is obtainable by grafting an ethylene copolymer with comonomer units comprising hydrolysable silane groups, wherein the polymer composition shows high gel content and low compression set at −25° C. These articles have applications in automotive weather-stripping, such as sealing systems for doors, trunks and hoods.

Articles comprising a polymer composition, wherein the polymer composition is obtainable by grafting an ethylene copolymer with comonomer units comprising hydrolysable silane groups, wherein the polymer composition shows high gel content and low compression set at −25° C. These articles have applications in automotive weather-stripping, such as sealing systems for doors, trunks and hoods.

Provided are: a heavy release additive for a release sheet, for imparting an excellent release coating whereby heavy release force is obtained curability is not reduced, low-temperature curing is possible, and there is also minimal reduction in residual adhesion rate of a released adhesive sheet; an addition-reaction-type organopolysiloxane composition; and a release sheet. A heavy release additive for a release sheet, containing an acrylic-silicone-based graft copolymer having a weight-average molecular weight of 30,000-2,000,000 obtained by radical polymerization of an organopolysiloxane compound (A) having a radical-polymerizable group, and a radical-polymerizable monomer (B) having an acrylic group and/or a methacrylic group, the heavy release additive for a release sheet wherein the component (A) includes an organopolysiloxane compound (A1) having one radical-polymerizable group in each molecule thereof, and the component (B) includes a radical-polymerizable monomer (B2) having two or more radical-polymerizable groups in each molecule thereof.

The invention provides a method for making silicone hydrogel contact lenses. The method of the invention is characterized by using an organic solvent as a processing-aid tool for controlling lens diameter without significantly affecting lens equilibrium water content during cast-molding of soft contact lenses from a polymerizable composition. By adjusting the weight percentage of the organic solvent in a polymerizable composition for making SiHy contact lenses, one can adjust lens diameter of produced SiHy lenses to meet target without affecting adversely the lens properties.

The invention provides a method for making silicone hydrogel contact lenses. The method of the invention is characterized by using an organic solvent as a processing-aid tool for controlling lens diameter without significantly affecting lens equilibrium water content during cast-molding of soft contact lenses from a polymerizable composition. By adjusting the weight percentage of the organic solvent in a polymerizable composition for making SiHy contact lenses, one can adjust lens diameter of produced SiHy lenses to meet target without affecting adversely the lens properties.