Abstract: A reaction product containing a non-cyclic alkoxy-functional polysiloxane is produced by heating a reaction system, which contains a cyclic polyorganosiloxane of the formula [(R12SiO)2/2]n, where the subscript n is an integer of at least 4 and each R1 is an alkyl group or aryl group; a silane of the formula R2(4?m)Si(OR3)m, where the subscript m is an integer from 1 to 4, each R2 independently is an alkyl group or aryl group, a hydrocarbyl group or a halogenated hydrocarbyl group and each R3 independently is an alkyl group; and a catalyst system comprising a metal trifluoromethanesulfonate of the formula [M]+[CF3SO3]?, where M is a metal atom selected from sodium (Na) and potassium (K), and a Brønsted acid, wherein Brønsted acids having a pKa?3.0, preferably having a pKa?2.0, particularly preferably having a pKa??0.0 are used.

Abstract: The present invention provides a gel containing a crosslinked polymer having at least one selected from the group consisting of an acidic dissociative group, an acidic dissociative group in a salt form, and a derivative group of an acidic dissociative group, and a condensate of a compound represented by the following formula (I): Si{R1—N(R2)(R3)}(OR4)(OR5)(R6) (wherein each group is as defined in the DESCRIPTION).

Abstract: Organopolysiloxanes having an OH content of 3.0-10.0% by weight are produced in a continuous process in which silanes of the formula I R1mSiR2nXo??(I), in which R1 is a C1-C18-hydrocarbon radical and R2 is a C1-C6-alkoxy radical and X is a chlorine or bromine radical m is 1, 2 or 3, n is 0, 1, 2 or 3 and o is 0, 1, 2 or 3, with the proviso that 4?m=n+o, and that in at least 30 mol % of the silanes of the general formula I, n?0 und o?0, water, and water-insoluble non-polar solvent are metered in continuously into a reactor to form a reaction mixture and the reaction mixture is continuously discharged from the reactor.

Abstract: Some variations provide a segmented copolymer composition comprising: fluoropolymer first soft segments that are (?,?)-hydroxyl-terminated and/or (?,?)-amine-terminated; polyester or polyether second soft segments that are (?,?)-hydroxyl-terminated and/or (?,?)-amine-terminated; isocyanate species possessing an isocyanate functionality of 2 or greater; and polyol or polyamine chain extenders or crosslinkers, wherein the molar ratio of the second soft segments to the first soft segments is less than 2.0. Exemplary segmented copolymers are disclosed. The segmented copolymer composition may be present in a low-friction, low-adhesion coating. Such a coating may be characterized by a coefficient of friction, measured at 90% relative humidity, less than 0.7. Such a coating may be characterized by an average kinetic delay of surface ice formation of at least 10 minutes at ?10° C. These coatings are useful as bugphobic and icephobic coatings.

Abstract: A curable organopolysiloxane composition that can achieve excellent initial adhesion improvement effects towards various types of substrates, and a protective agent or adhesive composition for electric and electronic components, are provided. The curable organopolysiloxane composition comprises (A) either i) (a1) an organopolysiloxane having a specific alkoxysilyl-containing group and at least an average of 0.5 alkenyl groups, or ii) a mixture of (a1) and (a2) an organopolysiloxane that has at least two alkenyl groups in a molecule, and that does not have the aforementioned group having an alkoxysilyl group. In the mixture, the amount of component (a1) is 10 to less than 100 mass %. The curable organopolysiloxane composition further comprises (B) an organopolysiloxane having at least two silicon-bonded hydrogen atoms in each molecule, (C) a catalyst for a hydrosilylation reaction, and (D) a catalyst for a condensation reaction.

Abstract: A room-temperature-curable silicone rubber composition exhibiting good adhesion to a substrate contacted during curing and capable of suppressing the occurrence of oil bleeding is disclosed. The room-temperature-curable silicone rubber composition comprises: (A) a mixture of (A1) an organopolysiloxane having at least two specified alkoxysilyl-containing groups in the molecular and (A2) an organopolysiloxane having one specified alkoxysilyl-containing group in the molecular; (B) an organopolysiloxane lacking a hydroxyl group and an alkoxy group; (C) an alkoxysilane; and (D) a condensation-reaction catalyst.

Abstract: A precipitated silica having an SiOHisolated absorbance ratio of greater than or equal to 1.5, a silanol group density of 1 to 3.0 SiOH/nm2, a modified tapped density of 1 to 50 g/l, and a pH of 3-5, when measured as a aqueous suspension of 5.00 g of the precipitated silica in 100 ml. of deionized water allows preparation of storage-stable RTV-1 silicone rubber formulations without stabilizer. A process for preparing the precipitated silica and its use in thickening sealants is provided.

Abstract: A composition provided to contain: an alkoxysilane condensate obtained by the condensation of alkoxysilane A represented by general formula (1): (CH3)Si(OR1)3 (In the general formula (1), R1 mutually independently represents methyl group or ethyl group.), alkoxysilane B represented by general formula (2): (Ph)Si(OR1)3 (In the general formula (2), R1 mutually independently represents methyl group or ethyl group.), and alkoxysilane C represented by general formula (3): (CH3)2Si(OR1)2 (In the general formula (3), R1 mutually independently represents methyl group or ethyl group.) at an A:B:C mole ratio within the range of 30-70:10-50:20-60; and a polyether-modified polydimethylsiloxane.

Abstract: A composition of matter comprising an interpenetrating polymer network of a combination of a silanol-containing polysiloxane phase and a silylated triglyceride oil phase. The two phases are mixed and covalently bound to each other via siloxane crosslinks. A method for producing interpenetrating polymer networks. The method comprises providing triglycerides from oils or fats and reacting the triglycerides with a reactive silane to form a silylated triglyceride oil. The silylated triglyceride oil and a silanol terminated polysiloxane are emulsified with water in a predetermined ratio. Thereafter, crosslinking agents are added and the water is removed from the emulsions providing siloxane crosslinks between the two intimately mixed immiscible phases.

Abstract: The present invention provides a curable coating composition comprising at least one linear or cyclic polysiloxane containing at least one quaternary ammonium group, a process for producing the aforesaid coating composition, and a process for producing a coating with the curable coating composition, and also the coatings and coating compositions themselves that are obtainable by the processes described.

Abstract: A tire dressing composition is provided that includes at least one silicone fluid having a viscosity of between 40 and 500,000 centiStokes at room temperature. An amine functionalized silicone fluid having a viscosity of between 40 and 500,000 centiStokes at room temperature is also present. A thickener is present to yield a coating from the composition has limited sag, low tack upon coating formation, and desirable durability properties. An organic solvent is present in which the at least one silicone fluid and the amine functionalized silicone fluid are soluble or suspended. A process is provided for dressing a tire having a previous silicone coating thereon, the process including applying the tire dressing composition and allowing a solvent to evaporate from the composition to form a tire dressing coating. The coating producing an initial gloss of great than 200 units.

Abstract: The flame-retardant silicone resin composition of the present invention comprises: an inorganic oxide particle-containing condensation-reactive silicone resin (A) comprising a crosslinking structure in which inorganic oxide particles dispersed in a polysiloxane resin having a condensation-reactive group are crosslinked with the polysiloxane resin by chemical bonds; and inorganic particles (B). The inorganic oxide particles are preferably at least one type of inorganic oxide particles selected from the group consisting of silica, alumina, glass frit, and antimony-doped tin oxide.

Abstract: A nonaqueous electrolyte and a lithium ion battery with reduced temporal variations in battery characteristics from initial values are provided. A mixed solution is prepared by dissolving a lithium salt such as LiPF6 in a nonaqueous solvent such as ethylene carbonate. Allylboronate ester and siloxane are mixed with the mixed solution. The content of the allylboronate ester is 1 wt % or less. The content of the siloxane is 2 wt % or less. 2-Allyl-4,4,5,5-tetramethyl-1,3,2-dioxaborolane is used as the allylboronate ester. At least one kind selected from hexamethyldisiloxane and 1,3-divinyltetramethyldisiloxane is used as the siloxane.

Abstract: Moisture curable RTV-1 silicone elastomers with hydrophilic surfaces are produced from crosslinkable compositions containing a polyoxyethylene ether glycol terminated with both a C6-22 hydrocarbon group and an alkoxysilyl group.

Abstract: The invention provides a surface treatment agent wherein a fluorooxyalkylene group-containing polymer or a fluorooxyalkylene group-containing polymer composition comprising the polymers, which is controlled of a temperature range of vaporization of fluorooxyalkylene group-containing polymer(s). The fluorooxyalkylene group-containing polymer has a fluorooxyalkylene structure represented by —(OCF2)p(OCF2CF2)q— and hydrolysable groups bond to a silicon atom represented by the formula at least one terminal. The polymer composition shows a decrease of 75% or more in weight, relative to the total weight of the polymer, in a temperature range of from 150 to 350 degrees C. when this is heated at a rate of 2 degrees C. per minute and a pressure of 0.1 Pa or less. The present surface treatment agent forms a coating having water- and oil-repellency and scratch resistance regardless of a vapor deposition conditions, in particularly by a vapor deposition at a mild temperature such as 350 degrees C.

Abstract: A method for producing an organopolysiloxane emulsion composition, which enables the organopolysiloxane to be formed with a high viscosity in a short period of time, and suppresses the amount of octamethylcyclotetrasiloxane (D4) to not more than 3,000 ppm. Specifically, a method for producing an organopolysiloxane emulsion which includes emulsifying a mixture containing an organopolysiloxane represented by formula: HO(R12SiO)nH and having a D4 content of not more than 1,000 ppm, a nonionic surfactant, an anionic surfactant, and water, and subjecting the obtained emulsion composition to emulsion polymerization, thus preparing the emulsion composition.

Abstract: The present invention provides curable compositions comprising non-Sn organo-metal catalysts that accelerate the condensation curing of moisture curable silicones/non-silicones. In particular, the present invention provides Zn(II) and Zr(IV) complexes that are particularly suitable as replacements for organotin for sealant and RTV formulations. The Zn(II) and Zr(IV) complexes are comparable or superior to organotin such as DBTDL and exhibit certain behavior in the presence of components that allow for tuning or adjusting the cure characteristics of the present compositions and provide good adhesion and storage stability.

Abstract: This invention comprises filled silicone compositions initially having a slump of at least 2.5 millimeters when tested described in ASTM D2202-00(2010) except temperature shall be 25 degrees Celsius and time shall be 5 minutes, and a method of preparing and uses of the composition.

Abstract: Polycarbonate compositions having flame retardant properties and improved impact resistance are disclosed, together with methods for preparing the same.

Abstract: The invention relates to an aqueous silicone dispersion, containing one or more polyorganosiloxanes (POSs) intended to be crosslinked or having been crosslinked by elimination of water or alcohol, according to a polycondensation mechanism. The present invention also relates to methods for preparing aqueous silicone emulsions and dispersions.

Abstract: Provided is a laminated film comprising a substrate, and at least one layer of film layer that is formed on at least one surface of the substrate, wherein at least one layer of the film layer contains silicon, oxygen, and hydrogen, a ratio of a total value of Q1, Q2, and Q3 peak areas to a Q4 peak area on the basis of an abundance ratio of silicon atoms having different bonding states to oxygen atoms, which are obtained by 29Si solid-state NMR measurement of the film layer, satisfies the following conditional expression (I): (total value of Q1, Q2, and Q3 peak areas)/(Q4 peak area)<1.0??(I) wherein Q1 represents a silicon atom that is bonded to one neutral oxygen atom and three hydroxyl groups, Q2 represents a silicon atom that is bonded to two neutral oxygen atoms and two hydroxyl groups, Q3 represents a silicon atom that is bonded to three neutral oxygen atoms and one hydroxyl group, and Q4 represents a silicon atom that is bonded to four neutral oxygen atoms.

Abstract: A method of making a polysiloxane containing polymer is described. The method comprises the steps of the polycondensation of a) 100 parts by weight of oligomers comprising non-cyclic siloxane containing oligomers having at least two condensable groups per molecule alone or in a mixture with one or organic oligomers having at least two condensable groups per molecule in the presence of: b) at least 2 parts by weight per 100 parts of (a) of one or more condensation catalysts comprising a Bronsted acid or a Lewis acid c) at least 15 parts by weight per 100 parts of (a) of one or more liquefied gases or a supercritical fluid therefrom. Subsequent to the reaction completion the polysiloxane containing polymer is recovered by expansion of the liquefied gas(es) or supercritical fluid (c).

Abstract: A room temperature curable organopolysiloxane composition comprising (A) a diorganopolysiloxane, (B) an alkoxysilane compound and/or a partial hydrolytic condensate thereof, (C) a curing catalyst, and (D) an organic compound having at least one fatty acid ester radical —OC(?O)CH2R3 (wherein R3 is H or a monovalent hydrocarbon radical) and 0, 1 or 2 hydroxyl radicals effectively cures to glass and fluoropolymer-coated aluminum without a need for primer and has storage stability in a sealed package.

Abstract: [Subject] The object of the present invention is to provide a method for producing siloxane oligomers which contain a small amount of ring form and have a high molecular weight. [Solving Means] An embodiment of the present invention is a method for producing siloxane oligomers which includes using a 2-hydroxycarboxylic acid compound represented by a predetermined formula as a catalyst and subjecting an alkoxysilane to hydrolysis and condensation. According to the production method of the present invention, it is possible to synthesize siloxane oligomers with a low content of siloxanes having cyclic structures and a high molecular weight.

Abstract: We describe methods for synthesis and formulations of stable elastomeric negative acoustic contrast particles with controllable compressibility and density. These elastomeric negative acoustic contrast particles have a density/compressibility ratio that is less than that of water and therefore exhibit negative acoustic contrast under acoustic radiation exposure. This negative acoustic contrast allows our elastomeric negative acoustic contrast particles to be acoustically manipulated (e.g. separated) differently from other components (e.g. cells) within an aqueous solution. This disclosure also describes methods for biofunctionalization of the elastomeric negative acoustic contrast particles and as an example their use as platforms for bioassays.

Abstract: A composition is capable of curing via condensation reaction. The composition uses a sulfonic acid condensation reaction catalyst. The sulfonic acid condensation reaction catalyst is used to replace conventional tin catalysts. The composition can react to form a gum, gel, or rubber.

Abstract: An oil-in-water silicone emulsion composition comprising (A) 100 mass parts of a polyorganosiloxane that contains in each molecule at least two silicon-bonded hydroxyl or hydrolyzable groups, (B) 0.1 to 200 mass parts of a colloidal silica, (C) 1 to 100 mass parts of an ionic emulsifying agent, (D) 0.1 to 50 mass parts of a polyoxyethylene-polyoxypropylene copolymer-type nonionic emulsifying agent, and (E) 10 to 200 mass parts water. Such oil-in-water silicone emulsion composition exhibits an excellent storage stability, contains little low molecular weight silicone, and can form, even without the use of a tin catalyst, a cured film that exhibits a satisfactory elasticity, through the removal of the water fraction.

Abstract: A tire dressing composition is provided that includes at least one silicone fluid having a viscosity of between 40 and 500,000 centiStokes at room temperature. An amine functionalized silicone fluid having a viscosity of between 40 and 500,000 centiStokes at room temperature is also present. A thickener is present to yield a coating from the composition has limited sag, low tack upon coating formation, and desirable durability properties. An organic solvent is present in which the at least one silicone fluid and the amine functionalized silicone fluid are soluble or suspended. A process is provided for dressing a tire having a previous silicone coating thereon, the process including applying the tire dressing composition and allowing a solvent to evaporate from the composition to form a tire dressing coating. The coating producing an initial gloss of great than 200 units.

Abstract: A coating film forming composition includes an amino acid generator including a protecting group that is eliminated to generate an amino acid. A coating film forming composition includes a component (A): the amino acid generator; a component (B): a hydrolyzable silane, a hydrolysis product thereof, a hydrolysis-condensation product thereof, or a mixture thereof; and a component (C): a solvent.

Abstract: A compound having a guanidine structure and uses thereof as organopolysiloxane polycondensation catalysts are described.

Abstract: A process for producing silicon-containing particles having an extremely small particle diameter by a simple process without using surface-active agents or the like. The process is characterized by forming silicon-containing particles as a result of phase separation from an organic polymer, wherein the phase separation is achieved by an addition reaction, condensation reaction, ring-opening reaction, or a radical reaction of a curable silicon-containing compound or a curable composition that contains said compound, and the silicon-containing compound or the composition is maintained in a uniform liquid, fused, or dissolved phase with the organic polymer that is free of silicon and does not participate in the curing reaction of the silicon-containing compound or the composition.

Abstract: A tire dressing composition is provided that includes at least one silicone fluid having a viscosity of between 40 and 500,000 centiStokes at room temperature. An amine functionalized silicone fluid having a viscosity of between 40 and 500,000 centiStokes at room temperature is also present. A thickener is present to yield a coating from the composition has limited sag, low tack upon coating formation, and desirable durability properties. An organic solvent is present in which the at least one silicone fluid and the amine functionalized silicone fluid are soluble or suspended. A process is provided for dressing a tire having a previous silicone coating thereon, the process including applying the tire dressing composition and allowing a solvent to evaporate from the composition to form a tire dressing coating. The coating producing an initial gloss of great than 200 units.

Abstract: The present invention relates to a process for the continuous preparation of mixtures containing organosilicon compound (A) and solid (B) and optionally further components in a mixing unit comprising at least one rotating mixing shaft, wherein at least one mixing shaft makes an angle of inclination with the horizontal of more than 10 degrees and the inlet opening for the solid (B) is arranged higher than the outlet opening.

Abstract: Provided are a process for producing a compatibilized resin including reacting a cyanate compound, a siloxane resin having a hydroxyl group at an end thereof, and an epoxy resin at a specified rate of reaction; a thermosetting resin composition containing (A1) a compatibilized resin produced by the foregoing process or (A2) a thermosetting resin obtained by reacting a cyanate compound and a siloxane resin having a hydroxyl group at an end thereof at a specified rate of reaction, and (B) fused silica having been subjected to a surface treatment with a trimethoxysilane compound; and a prepreg, a laminate, and a wiring board each using the same.

Abstract: The present invention relates to a curable dental composition comprising a surfactant and an F-containing compound. The dental composition can be used e.g. as impression material and/or for the production of crown and bridges.

Abstract: A process is described for making polysiloxane emulsions by emulsion polymerizing a silicon monomer or oligomer under an elevated pressure. The process produces emulsions of a polysiloxane containing a lower amount of octamethylcyclotetrasiloxane (D4) and decamethylcyclopentasiloxane (D5) than conventional emulsion polymerization techniques. The emulsions by the inventive method can be used in cosmetic and personal care products, for textile treatment, lubrication, release, and building material protections.

Abstract: The disclosure relates to a polycarbonate resin film with excellent clarity and flame retardance. The compositions comprise 100 parts by weight of a polycarbonate resin (A). The compositions further comprise 0.10 to 0.18 parts by weight of an alkali metal or alkaline earth metal salt compound (B) of a perfluoroalkane sulfonic acid. The compositions further comprise 0.05 to 0.35 parts by weight of a silicone compound (C). The film has an average thickness of 200 to 500 ?m, a degree of haze of 5% or lower as measured according to the conditions specified in JIS K7105, and a flame retardance of VTM-1 or VTM-0 at a thickness of 300 ?m as measured according to the UL94 test specified by the Underwriters Laboratories (UL).

Abstract: Disclosed herein is a silicone release coating composition of condensation reaction curing type including: (A) an organopolysiloxane having at least two silanol groups in one molecule; (B) (B-1) an organohydrogenpolysiloxane having at least three SiH groups in one molecule, and/or (B-2) an organopolysiloxane having at least three hydrolyzable groups directly bonded to a silicon atom in one molecule; (C) a compound of metal selected from Mg, Al, Ti, Cr, Fe, Co, Ni, Cu, Zn, Zr, W, and Bi, which functions as a condensation reaction catalyst; and (D) (D-1) a cocatalyst of an organic compound having a bond between a nitrogen atom and an oxygen atom and/or a bond between a nitrogen atom and a sulfur atom through 1 to 3 carbon atoms, or (D-2) a cocatalyst of an organic compound functioning as an oxygen multidentate ligand.

Abstract: The present invention relates to curable alkenyl based silicone release coating compositions having improved adhesion to paper and polymeric substrates. Furthermore the present invention relates to the process for making a silicone release coating with improved adhesion to paper and polymeric substrates.

Abstract: A resin composition suited for rapid prototyping is provided comprising (I) an actinic energy radiation-curable silicone composition, (II) an actinic energy radiation-sensitive polymerization initiator, and (III) an actinic energy radiation absorber. The resin composition experiences little viscosity buildup and maintains fluidity during long-term storage at elevated temperature, and is effective in rapid prototyping or shaping by stereolithography using any actinic energy radiation.

Abstract: The present invention provides a crosslinkable elastomer composition, in which generation of HF under high temperature conditions is reduced, the decrease in weight to both NF3 plasma treatment and O3 treatment in the semiconductor manufacturing process is small and generation of foreign substances (particles) in these treatments is suppressed significantly. Specifically, the present invention relates to a crosslinkable elastomer composition comprising a crosslinkable elastomer and a filler having a specific surface area of at least 0.5 m2/g and containing a synthetic polymer having a thermally and chemically stable aromatic ring in the main chain, a crosslinkable elastomer composition comprising a crosslinkable elastomer and nonoxide ceramics and a crosslinkable elastomer composition wherein the decrease in weight by NF3 plasma irradiation is at most 0.20%.

Abstract: We describe methods for synthesis and formulations of stable elastomeric negative acoustic contrast particles with controllable compressibility and density. These elastomeric negative acoustic contrast particles have a density/compressibility ratio that is less than that of water and therefore exhibit negative acoustic contrast under acoustic radiation exposure. This negative acoustic contrast allows our elastomeric negative acoustic contrast particles to be acoustically manipulated (e.g. separated) differently from other components (e.g. cells) within an aqueous solution. This disclosure also describes methods for biofunctionalization of the elastomeric negative acoustic contrast particles and as an example their use as platforms for bioassays.

Abstract: The disclosure is directed to a sterilized medical device including a non-polymerized blend including a silicone matrix material and a radiation resistant component.

Abstract: A two-part moisture-curing composition having as a first part water and an hydroxy-terminated diorganosiloxane; and a second part which includes a reactive silicone, at least one end-capping silane which includes one or more enoxy groups, at least one end-capping catalyst and at least one moisture cure catalyst. Enhanced and controlled cure speed is obtained by these compositions.

Abstract: This invention relates to the polymerization of organopolysiloxanes to form organopolysiloxanes of increased molecular weight and to the organopolysiloxane compositions thus produced. The organopolysiloxane is in admixture with a molten wax during the polymerization, thereby forming a blend of the wax with an organopolysiloxane of increased molecular weight. After the polymerisation reaction is completed, the reaction product can be cooled below the solidification temperature of the wax, for example down to room temperature. This yield a paste-like solid blend which is a very intimate dispersion of wax in organopolysiloxane or vice versa. The dispersion is surprisingly stable.

Abstract: An addition-curable silicone emulsion that exhibits stable curability even with a small amount of platinum. The curable emulsion composition is composed of an emulsion A and an emulsion B described below which are mixed together at the time of use, wherein the ratio of [number-average particle size of dispersed particles in emulsion A]/[number-average particle size of dispersed particles in emulsion B] is within a range from 0.4 to 2.0. The emulsion A comprises a specific alkenyl group-containing organopolysiloxane, a specific organohydrogenpolysiloxane, a nonionic surfactant, a polyvinyl alcohol and water, wherein the number-average particle size of the dispersed particles is within a range from 300 to 1,000 nm. The emulsion B comprises a specific alkenyl group-containing organopolysiloxane, a platinum-based complex, a nonionic surfactant, a polyvinyl alcohol and water, wherein the number-average particle size of the dispersed particles is within a range from 300 to 1,000 nm.

Abstract: A compound having a guanidine structure and uses thereof as organopolysiloxane polycondensation catalysts are described.

Abstract: Multistage polymers predominantly stabilized by nonionic emulsifiers and derived from hard and soft monomer compositions containing vinyl esters, of which at least one monomer composition must contain an unsaturated compromisable organosilicon compound, are described. The plastic dispersions can be used as binders in emulsion paints and finishes and impart to these excellent scrub resistance in addition to good blocking resistance.

Abstract: The present invention relates to a method for concentrating organic silicate polymer solution, and more precisely, a method for concentrating organic silicate polymer solution by distillation which is characterized by remarkably reduced distillation time realized by the short-term continuous distillation at low temperature under low pressure, minimized physical property changes attributed to the inhibition of the heat-induced reaction by making the solution pass through the thin film evaporator shortly, concentration without cake generation, and easy manipulation with high capacity, making the method highly economical.

Abstract: Described are compositions comprising a fluorine containing or fluorine and silicon containing polymer, with a reactive diluent, and optionally non-reactive oligomeric additives, crosslinkers, or inorganic particles, which upon curing provides coatings with a good balance of adhesion, mechanical properties, scratch resistance, low surface energy, repellency, and transparency. The compositions are useful as a topcoat, particularly in optical applications.