Abstract: Provided is a coating composition that contains (A) an alkoxysilane containing a compound represented by formula (I) or a hydrolyzate or condensate thereof and (B) a curing catalyst, the coating composition giving a coating having selective ultraviolet radiation transmission optical-characteristics, namely transmitting ultraviolet radiation having wavelengths of 280 nm or more to the greatest extent possible while completely blocking ultraviolet radiation having wavelengths of less than 280 nm, without losing the advantages of a curable coating composition having a siloxane bond. (In the formula, the Y moieties may be the same as, or different from, each other, and each denote a group represented by —R1—SiR2n(OR3)3?n, R? denotes an alkylene group having 1-6 carbon atoms, and R2 and R3 may be the same as, or different from, each other, and each denote an alkyl group having 1-5 carbon atoms, n is an integer between 0 and 2.

Abstract: A plastic article is provided wherein a plastic substrate is coated with multiple resin layers including a primer layer comprising a polymer having a UV-absorptive functional group incorporated therein and a weather resistant hardcoat layer comprising a reaction product of alkoxysilyl-containing benzophenone and/or a hydrolyzate thereof.

Abstract: Disclosed is a method for repairing a damaged area of a silicone hard-coat layer on an automotive resin glazing substrate by applying an intermediate coating composition (I) to the damaged area and applying a topcoat coating composition (II) to the intermediate coating composition. The intermediate coating composition (I) contains (A) a reactive siloxane compound and (B) silica. The topcoat coating composition (II) contains (C) an alkoxysilane having a UV-absorbing functional group, (D) a multifunctional alkoxysilane, (E) a reactive siloxane compound, (F) colloidal silica, and (G) phosphoric acid. The method forms a coating having the same appearance and physical properties as the underlying silicone hard-coat layer.

Abstract: A refinish coating system comprising (I) an intermediate coating composition and (II) a topcoat coating composition is useful for repairing a damage area of a silicone hard coat layer on an automotive resin glazing substrate. The intermediate coating composition (I) comprises (A) a reactive siloxane compound and (B) silica. The topcoat coating composition (II) comprises (C) an alkoxysilane having a UV-absorbing functional group, (D) a multifunctional alkoxysilane, (E) a reactive siloxane compound, (F) colloidal silica, and (G) phosphoric acid. The system forms a coating having the same appearance and physical properties as the underlying silicone hard coat layer.

Abstract: A coating composition comprising (A) a UV-absorbing functionality-bearing alkoxysilane, (B) colloidal silica, (C) a multifunctional alkoxysilane and/or a partial hydrolytic condensate thereof, and (D) phosphoric acid is applicable and curable to resin substrates, typically polycarbonate substrates without a need for primer, heat or UV. On curing, it forms a film having transparency, mar resistance, and UV screening properties.

Abstract: A coating composition is provided which contains (A) a co-hydrolytic condensate of a UV-absorbing alkoxysilane, a UV-curable alkoxysilane, and a tetraalkoxysilane, (B) a polyfunctional poly(meth)acrylate, and (C) a photobleachable photopolymerization initiator. Upon exposure to UV, the composition cures briefly at low temperature to form a cured film having durability, adhesion and transparency.

Abstract: A composition comprising (A) a hydrolytic condensate of a bisphenol A alkoxysilane, (B) silica colloid sol, and (C) a curing catalyst is coated and cured to a transparent substrate to form a transparent film having crack resistance, flexibility and water vapor barrier properties.

Abstract: A plastic article is provided wherein a plastic substrate is coated with multiple resin layers including a primer layer comprising a polymer having a UV-absorptive functional group incorporated therein and a weather resistant hardcoat layer comprising a reaction product of alkoxysilyl-containing benzophenone and/or a hydrolyzate thereof.

Abstract: A coating composition is provided comprising (A) a co-hydrolytic condensate of a UV-absorbing alkoxysilane, a UV-curable alkoxysilane, and a tetraalkoxysilane, (B) a polyfunctional poly(meth)acrylate, and (C) a photobleachable photopolymerization initiator. Upon exposure to UV, the composition cures briefly at low temperature to form a cured film having durability, adhesion and transparency.

Abstract: A mixture of a benzophenone derivative having hydroxyl and alkoxysilyl groups and a benzophenone derivative having silyloxy and alkoxysilyl groups provides a reactive UV absorber which is unlikely to gel, stable during shelf storage, and curable. A coating solution comprising the UV absorber cures at room temperature to form a UV-screening film which has adhesion to glass and plastic substrates, scratch resistance, and bleed resistance, and maintains a UV-screening function over time.

Abstract: A composition comprising (A) a hydrolytic condensate of a bisphenol A alkoxysilane, (B) silica colloid sol, and (C) a curing catalyst is coated and cured to a transparent substrate to form a transparent film having crack resistance, flexibility and water vapor barrier properties.

Abstract: A perfluoropolyether rubber composition is useful for forming a polymer electrolyte membrane, comprising (A) an alkenyl-containing perfluoropolyether, (B) a silicon-oxygen crosslinked structure having ionic conduction, and (C) a peroxide crosslinker. The silicon-oxygen crosslinked structure is obtained by simultaneously effecting oxidation and hydrolysis on an organoxysilane having an epoxy group and an organoxysilane having a mercapto group for thereby converting the mercapto group into a sulfonic group, and neutralizing the resulting sulfonic group-containing siloxane with a nitrogen-containing compound.

Abstract: A mixture of a benzophenone derivative having hydroxyl and alkoxysilyl groups and a benzophenone derivative having silyloxy and alkoxysilyl groups provides a reactive UV absorber which is unlikely to gel, stable during shelf storage, and curable. A coating solution comprising the UV absorber cures at room temperature to form a UV-screening film which has adhesion to glass and plastic substrates, scratch resistance, and bleed resistance, and maintains a UV-screening function over time.

Abstract: An organopolysiloxane having triazinethiol and alkenyl radicals in a molecule and a primer composition comprising the same are provided. The primer composition assists in establishing a high bond strength between metal and silicone rubber by the mechanism that the triazinethiol moieties form strong chemical bonds with a difficult-to-bond metal such as gold, silver or copper, and the alkenyl moieties are involved in silicone rubber vulcanization.

Abstract: An organopolysiloxane having triazinethiol and alkenyl radicals in a molecule and a primer composition comprising the same are provided. The primer composition assists in establishing a high bond strength between metal and silicone rubber by the mechanism that the triazinethiol moieties form strong chemical bonds with a difficult-to-bond metal such as gold, silver or copper, and the alkenyl moieties are involved in silicone rubber vulcanization.

Abstract: A perfluoropolyether rubber composition is useful for forming a polymer electrolyte membrane, comprising (A) an alkenyl-containing perfluoropolyether, (B) a silicon-oxygen crosslinked structure having ionic conduction, and (C) a peroxide crosslinker. The silicon-oxygen crosslinked structure is obtained by simultaneously effecting oxidation and hydrolysis on an organoxysilane having an epoxy group and an organoxysilane having a mercapto group for thereby converting the mercapto group into a sulfonic group, and neutralizing the resulting sulfonic group-containing siloxane with a nitrogen-containing compound.

Abstract: A conductive adhesive composition is obtained by mixing a binder resin with 30-98 wt % based on the adhesive composition of a silver powder as a conductive agent. The silver powder contains a silver powder consisting of flat primary particles and having a massive agglomerate structure and a tap density of 0.1-1.5 g/cm3 in an amount of 30-98 wt % based on the adhesive composition. The conductive adhesive composition cures into a product having improved conductivity, adhesion, heat resistance, moisture resistance, ease of working and heat transfer.

Abstract: A conductive powder is incorporated in a pressure-sensitive adhesive composition comprising a silicone gum, an MQ resin, and a crosslinking agent. The conductive powder consists of core particles of inorganic material or organic resin, an interlayer of silicon-base polymer, and a metal plating. The resulting conductive silicone pressure-sensitive adhesive composition is satisfactorily adherent to silicone rubber and cures into a product that exhibits stable conductivity and adhesive properties in the temperature region where silicone rubber is used.

Abstract: A conductive composition is obtained by dispersing conductive particles in a curable polymer. At least 50% by weight of the entire conductive particles are those conductive particles coated with a metal on their outermost layer surface and having a specific gravity which differs within ±1.5 from the specific gravity of the curable polymer. The composition remains stable during storage, experiences a minimal change with time of curability, and cures into a conductive rubber which experiences a minimal change with time of volume resistivity.

Abstract: A conductive adhesive composition is obtained by mixing a binder resin with 30-98 wt % based on the adhesive composition of a silver powder as a conductive agent. The silver powder contains a silver powder consisting of flat primary particles and having a massive agglomerate structure and a tap density of 0.1-1.5 g/cm3 in an amount of 30-98 wt % based on the adhesive composition. The conductive adhesive composition cures into a product having improved conductivity, adhesion, heat resistance, moisture resistance, ease of working and heat transfer.