Abstract: An epoxy resin composition includes a polyol (A) having a hydroxyl value of 130 to 600 mgKOH/g, an epoxy resin (B), an amine curing agent (C), and a toughener (D). The epoxy resin composition may satisfy both 0.1?Wt2/Wp?8.0 and 0.1?Wp?8.0, where Wp represents the polyol (A) content of the composition in % by weight and Wt represents the toughener (D) content of the composition in % by weight, relative to a total amount of the polyol (A), the epoxy resin (B), the amine curing agent (C), and the toughener (D).

Abstract: A toughened epoxy resin composition includes an end-capped polyalkylene oxide (A), an epoxy resin (B), an epoxy curing agent (C), and a core shell polymer (D). The end-capped polyalkylene oxide (A) has a number average molecular weight of 1500 to 5000, and 40% or more of a total number of ends of the end-capped polyalkylene oxide (A) are capped with at least one selected from the group consisting of an alkyl group, an allyl group, and an aryl group. A weight ratio of the end-capped polyalkylene oxide (A) to the core shell polymer (D) is 10/90 to 90/10. The core shell polymer (D) comprises a core layer in an amount of 70 to 95% by weight and the core layer is one or more selected from the group consisting of diene rubber, (meth)acrylate rubber, organosiloxane rubber, styrene polymer, and (meth)acrylate polymer.

Abstract: A polyol composition includes a first polyol (A-I) having a number average molecular weight of 1000 to 10000; and 35 to 60% by weight of a core-shell polymer (B) including a core layer and a shell layer. The core-shell polymer is uniformly dispersed in the first polyol (A-I) and has a volume average particle diameter of 0.01 to 0.6 ?m. A polymer constituting the shell layer has a solubility parameter of 9.30 to 10.20 (cal/cm3)1/2 and comprises at least 25 to 90% by weight of an alkyl (meth)acrylate unit having a linear or branched alkyl group of 4 to 10 carbons.

Abstract: An epoxy resin composition includes a polyol (A) having a hydroxyl value of 130 to 600 mgKOH/g, an epoxy resin (B), an amine curing agent (C), and a toughener (D). The epoxy resin composition may satisfy both 0.1?Wt2/Wp?8.0 and 0.1?Wp?8.0, where Wp represents the polyol (A) content of the composition in % by weight and Wt represents the toughener (D) content of the composition in % by weight, relative to a total amount of the polyol (A), the epoxy resin (B), the amine curing agent (C), and the toughener (D).

Abstract: The present invention relates to a modified polyaspartic acid ester containing a polyaspartic acid ester (A) and polymer fine particles (B), wherein the polymer fine particles have a volume average particle diameter of 0.01 to 0.6 ?m and an amount of the polymer fine particles is 0.5 to 70% by weight, and a curable resin composition containing a polyaspartic acid ester (A), polymer fine particles (B) having a volume average particle diameter of 0.01 to 0.6 ?m, and a polyisocyanate (C).

Abstract: The object of the present invention is to provide an epoxy resin composition for casting having excellent heat resistance and thermal shock resistance. The epoxy resin composition for casting of the present invention contains a silica powder (A), a liquid epoxy resin (B), a polyether polyol (C), a liquid acid anhydride (D), a curing accelerator (E), and a core shell polymer (F).

Abstract: A toughened epoxy resin composition includes an end-capped polyalkylene oxide (A), an epoxy resin (B), an epoxy curing agent (C), and a core shell polymer (D). The end-capped polyalkylene oxide (A) has a number average molecular weight of 1500 to 5000, and 40% or more of a total number of ends of the end-capped polyalkylene oxide (A) are capped with at least one selected from the group consisting of an alkyl group, an allyl group, and an aryl group. A weight ratio of the end-capped polyalkylene oxide (A) to the core shell polymer (D) is 10/90 to 90/10. The core shell polymer (D) comprises a core layer in an amount of 70 to 95% by weight and the core layer is one or more selected from the group consisting of diene rubber, (meth)acrylate rubber, organosiloxane rubber, styrene polymer, and (meth)acrylate polymer.

Abstract: A polyol composition includes a first polyol (A-I) having a number average molecular weight of 1000 to 10000; and 35 to 60% by weight of a core-shell polymer (B) including a core layer and a shell layer. The core-shell polymer is uniformly dispersed in the first polyol (A-I) and has a volume average particle diameter of 0.01 to 0.6 ?m. A polymer constituting the shell layer has a solubility parameter of 9.30 to 10.20 (cal/cm3)1/2 and comprises at least 25 to 90% by weight of an alkyl (meth)acrylate unit having a linear or branched alkyl group of 4 to 10 carbons.

Abstract: The present invention relates to a modified polyaspartic acid ester containing a polyaspartic acid ester (A) and polymer fine particles (B), wherein the polymer fine particles have a volume average particle diameter of 0.01 to 0.6 ?m and an amount of the polymer fine particles is 0.5 to 70% by weight, and a curable resin composition containing a polyaspartic acid ester (A), polymer fine particles (B) having a volume average particle diameter of 0.01 to 0.6 ?m, and a polyisocyanate (C).

Abstract: The object of the present invention is to provide an epoxy resin composition for casting having excellent heat resistance and thermal shock resistance. The epoxy resin composition for casting of the present invention contains a silica powder (A), a liquid epoxy resin (B), a polyether polyol (C), a liquid acid anhydride (D), a curing accelerator (E), and a core shell polymer (F).

Abstract: An object of the present invention is to provide a curable resin composition capable of giving a cured product which is excellent in mechanical properties (such as elastic modulus) and toughness. The curable resin composition contains 60 to 99 parts by mass of an unsaturated ester resin, 0.5 to 20 parts by mass of an epoxy resin, and 0.1 to 20 parts by mass of crosslinked rubber particles having a number average particle diameter of 20 nm to 600 nm. The crosslinked rubber particles are obtained by polymerizing a vinyl monomer in the presence of one or more rubber polymers selected from the group consisting of a butadiene rubber, a butadiene-styrene rubber, a butadiene-butyl acrylate rubber, a butyl acrylate rubber and an organosiloxane rubber.

Abstract: Nanocomposites and method of making same are provided using nanoplatelets. A nanocomposite is provided, and the nanocomposite includes nanoparticles, inorganic platelets, and a polymer material. A method is provided for dispersing nanoparticles into a polymeric material by using inorganic nanoplatelets.

Abstract: A method of forming dispersed water-soluble quantum dots and tuning water-soluble quantum dot aggregate size by providing a plurality of water-soluble quantum dots in a dispersion, the plurality of water-soluble quantum dots are modified with an amphiphilic polymer, and by adding an amount of the amphiphilic polymer to the dispersion such that the ratio of the amphiphilic polymer units to quantum dots is maintained higher to obtain dispersions of smaller quantum dot aggregates and kept lower to obtain dispersions of larger quantum dot aggregates.

Abstract: An object of the present invention is to provide a curable resin composition capable of giving a cured product which is excellent in mechanical properties (such as elastic modulus) and toughness. The curable resin composition contains 60 to 99 parts by mass of an unsaturated ester resin, 0.5 to 20 parts by mass of an epoxy resin, and 0.1 to 20 parts by mass of crosslinked rubber particles having a number average particle diameter of 20 nm to 600 nm. The crosslinked rubber particles are obtained by polymerizing a vinyl monomer in the presence of one or more rubber polymers selected from the group consisting of a butadiene rubber, a butadiene-styrene rubber, a butadiene-butyl acrylate rubber, a butyl acrylate rubber and an organosiloxane rubber.

Abstract: A zinc oxide polymer nanocomposite composed of zinc oxide nanoparticles. The zinc oxide nanoparticles of the nanocomposite have an average particle size of about 1 nanometer to about 20 nanometers. Suitable polymers of the nanocomposites have less than about 500 ppm alkali metal. A process is provided for preparing the zinc oxide polymer nanocomposites comprising a) preparing a first combination comprising zinc oxide nanoparticles and a polymer; b) preparing a second combination comprising the first combination and an organic solvent; and c) precipitating the zinc oxide nanoparticles and the polymer out of the second combination. The zinc oxide nanoparticles of the first combination have an average particle size of between about 1 nanometer and about 20 nanometers.

Abstract: The present invention provides a polyorganosiloxane-containing graft copolymer which is obtainable by polymerizing 0.

Abstract: A method of forming dispersed water-soluble quantum dots and tuning water-soluble quantum dot aggregate size by providing a plurality of water-soluble quantum dots in a dispersion, the plurality of water-soluble quantum dots are modified with an amphiphilic polymer, and by adding an amount of the amphiphilic polymer to the dispersion such that the ratio of the amphiphilic polymer units to quantum dots is maintained higher to obtain dispersions of smaller quantum dot aggregates and kept lower to obtain dispersions of larger quantum dot aggregates.

Abstract: Nanocomposites and method of making same are provided using nanoplatelets. A nanocomposite is provided, and the nanocomposite includes nanoparticles, inorganic platelets, and a polymer material. A method is provided for dispersing nanoparticles into a polymeric material by using inorganic nanoplatelets.

Abstract: The present invention is directed to novel sol-gel methods in which metal oxide precursor and an alcohol-based solution are mixed to form a reaction mixture that is then allowed to react to produce nanosized metal oxide particles. The methods of the present invention are more suitable for preparing nanosized metal oxide than are previously-described sol-gel methods. The present invention can provide for nanosized metal oxide particles more efficiently than the previously-described sol-gel methods by permitting higher concentrations of metal oxide precursor to be employed in the reaction mixture. The foregoing is provided by careful control of the pH conditions during synthesis and by ensuring that the pH is maintained at a value of about 7 or higher.

Abstract: A zinc oxide polymer nanocomposite composed of zinc oxide nanoparticles. The zinc oxide nanoparticles of the nanocomposite have an average particle size of about 1 nanometer to about 20 nanometers. Suitable polymers of the nanocomposites have less than about 500 ppm alkali metal. A process is provided for preparing the zinc oxide polymer nanocomposites comprising a) preparing a first combination comprising zinc oxide nanoparticles and a polymer; b) preparing a second combination comprising the first combination and an organic solvent; and c) precipitating the zinc oxide nanoparticles and the polymer out of the second combination. The zinc oxide nanoparticles of the first combination have an average particle size of between about 1 nanometer and about 20 nanometers.