This invention relates to an aqueous coating composition, a greaseproof article and a process of forming a coating on a substrate. The aqueous coating composition comprises at least the following components: an organopolysiloxane (A) which is a polysiloxane compound having at least two alkenyl groups per molecule, an organohydrogenpolysiloxane (B) which is a polysiloxane compound comprising at least two Si H groups per molecule, an hydrosilylation catalyst (C) able to catalyse an hydrosilylation reaction between the organopolysiloxane compound (A) and the organohydrogenpolysiloxane compound (B), an organic copolymer (D) comprising at least two types of repeating units (i) and (ii): unit (i) which is an alkyl group comprising from 2 to 2 carbon atoms, unit (ii) which is an alkyl group comprising from 2 to 12 carbon atoms and having at least one pendant alcohol substituent, water, and the composition is able to form upon curing by hydrosilylation a coating on a substrate.

A crosslinked polyolefin separator which has gels with a longer side length of 50 m or more in a number ranging from 0 to 3 per 1 m.sup.2 of the separator, and shows a standard deviation of absorbance ratio between the center of the separator and the side thereof ranging from 0.01 to 0.5 is provided. A method for manufacturing the crosslinked polyolefin separator is also provided. The method includes (S1) preparing a polyolefin porous membranes, and (S2) applying a coating solution containing an initiator and alkoxy group-containing vinylsilane onto at least one surface of the porous membrane. The coating solution can permeate even to the inside of exposed pores. Thus, it is possible to provide a crosslinked polyolefin separator in which silane crosslinking occurs uniformly even inside of the pores.

Provided are a polyhedral oligomeric silsesquioxane and a preparation method thereof, more particularly, a polyhedral oligomeric silsesquioxane itself which has a low refractive property and enables formation of a coating layer with excellent chemical and mechanical properties, and provides excellent adhesive strength for the surfaces of various substrates, and a preparation method thereof.

Expandable polystyrene-based resin particles may include a styrene-based monomer, a polysiloxane-containing macro monomer, and a coating composition having a melting point of 40 C. or greater. A coefficient of static friction of a foamed molded product, obtained by pre-expanding the expandable polystyrene-based resin particles and molding the pre-expanded expandable polystyrene-based resin particles, may be 4.0 or less. The expandable polystyrene-based resin particles may have a surface layer part that contains polysiloxane as a main component.

A thermosetting resin composition and a prepreg and a metal foil-covered laminate made using same, the thermosetting resin composition comprising component (A): a solvent-soluble polyfunctional vinyl aromatic copolymer, the copolymer being a poly-functional vinyl aromatic copolymer having a stoctoal unit derived from monomers comprising divinyl aromatic compound (a) and ethyl vinyl aromatic compound (b); and component (B): a vinyl-containing organic silicone resin. The prepreg and metal foil-covered laminate made from the thermosetting resin composition have good toughness, and maintain a high glass transition temperature, a low water absorption, dielectric properties and humidity resistance, being suitable for the field of high-frequency and high-speed printed circuit boards and the processing of multilayer printed circuit boards.

Provided are rapidly cross-linkable silicone foam compositions, kits, and methods for filling implanted medical devices in situ or in vivo, the implanted medical devices, including for example, body implants and tissue expanders, the compositions including a platinum divinyl disiloxane complex; a low viscosity vinyl terminated polydimethylsiloxane; a low viscosity hydride terminated polydimethylsiloxane; a silicone cross-linker; and a gas and/or gas-filled microcapsules, where the rapidly cross-linkable silicone foam composition has a viscosity of 150 cPs for 1 min. post-preparation and 300 cPs5 min. post-preparation, at ambient temperature.

Provided is an inexpensive thermally conductive silicone rubber composite sheet. The thermally conductive silicone rubber composite sheet of the invention includes a laminated structure body comprised of an intermediate layer and an outer layer laminated on both surfaces of the intermediate layer, in which

(A) the intermediate layer is an electrical insulating synthetic resin film layer having a thermal conductivity of not lower than 0.20 W/m.Math.K and a tensile elastic modulus of not lower than 5 GPa, and

(B) the outer layer is a silicone rubber layer of a cured product of a composition containing: (a) an organopolysiloxane; (b) a curing agent; (c) a thermally conductive filler; and (d) a silicon compound-based adhesion imparting agent having at least one kind of group selected from the group consisting of an epoxy group, an alkoxy group, a methyl group, a vinyl group and a SiH group.

A method for making a solventless polyorganosiloxane pellet is disclosed. The pellet is comprised of a polyorganosilicate resin and a polyorganosiloxane gum. The pellet is useful for making silicone pressure sensitive adhesive compositions.

A polycarbonate article comprises: a substrate comprising a poly(carbonate-bisphenol arylate ester) composition that comprises, based on the total weight of the poly(carbonate-bisphenol arylate ester) composition, 90 to 99.9 wt. %, preferably 95 to 99.9 wt. % of a poly(carbonate-bisphenol arylate ester), and 0.1 to 10 wt. %, preferably 0.1 to 5 wt. % of an additive comprising at least one of a processing aid, a heat stabilizer, an antioxidant, and an ultra violet light absorber; and a siloxane urethane acrylate coating disposed on at least a portion of a surface of the substrate, the siloxane urethane acrylate coating having a thickness of greater than or equal to 8 micrometers; wherein the article has a pencil hardness of 2H or harder when measured according to ASTM D3363-00 at 1,000 g force on the siloxane urethane acrylate coating.

Abrasion resistant ultraviolet (UV) curable coatings, which may be applied in the field. Flooring products including such abrasion resistant UV curable coatings and methods of applying such abrasion resistant UV curable coatings to flooring products.