Kaneka Corporation

The Texas A&m University System

Kaneka Texas Corporation

Other

Riichi Nishimura

Takahiko Sugaya

Hung-Jue Sue

Kazuhisa Tajima

Akira Takaki

Nobuo Miyatake

Kentaro Takesada

Peng Li

Takenobu Sunagawa

Koji Yui

Shinichi Yauchi

Minhao Wong

Xi Zhang

Yuntao Li

A method of manufacturing a nanocomposite having a continuous organic phase and oligomer-modified nanoplatelet mesomorphic structures, wherein the oligomer has a molecular weight of at least 100 g/mol.

Surface-modified, exfoliated nanoplatelets as mesomorphic structures in solutions and polymeric matrices

A method for dispersing nanotubes, comprising forming a nanocomposite solution with associated nanotubes and nanoplatelets, mixing a surfactant to the nanocomposite solution, separating the nanocomposite in solution, wherein the nanotubes remain suspended in the surfactant solution, and isolating the nanotubes in solution. In certain instances, the method further comprises functionalizing the nanotubes in solution.

Dispersion and retrieval of de-bundled nanotubes

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.

Process for preparing nano-sized metal oxide particles

A resin composition for capstock, comprising 100 to 30 parts by weight of an impact resistance modifier having a multilayer structure, and 0 to 70 parts by weight of a methyl methacrylate (co)polymer containing 50 to 100% by weight of methyl methacrylate and 50 to 0% by weight of a monomer which is copolymerizable therewith, wherein the total amount of the impact resistance modifier and the methyl methacrylate (co)polymer is 100 parts by weight, wherein the outer layer of said impact resistance modifier and/or said methyl methacrylate copolymer is copolymerized with 0.5 to 40% by weight of a reactive monomer based on the total amount of the impact resistance modifier and the methyl methacrylate (co)polymer as a polymer component, and wherein the homopolymer of said reactive monomer has an SP value of 9.8 (cal/cm)/or more.

Resin composition for capstock

The present invention provides a processing aid for thermoplastic resin having a weight average molecular weight of 10,000 to 300,000, which is obtained by polymerizing an alkyl (meth)acrylate, or an alkyl (meth)acrylate and another vinyl monomer copolymerizable therewith, in the presence of a mercaptan having an alkyl ester group with Calkyl group as a chain transfer agent, and/or an organic peroxide having a tertiary-butyl peroxy group as a polymerization initiator.

Processing aid for thermoplastic resin and thermoplastic resin composition containing the same

An acrylic resin composition with excellent impact resistance, weatherability, processability and low gloss is provided. The acrylic resin composition comprises, (A) 10 to 40 parts by weight of a high molecular weight acrylic (co)polymer which is a one-step or multi-step polymer containing 72 to 100% by weight of methyl methacrylate and 0 to 28% by weight of a copolymerizable monomer, the (co)polymer having a specific viscosity of at least 0.5 (solvent: toluene, concentration: 0.4%, temperature: 30&#xb0; C.), wherein a polymer layer obtained in one of the steps contains at least 72% by weight of methyl methacrylate, has a specific viscosity of at least 0.5 and makes up at least 55% by weight of the total weight of the high molecular weight acrylic (co)polymer (A); (B) 0 to 80 parts by weight of an acrylic (co)polymer containing 50 to 100% by weight of methyl methacrylate and 0 to 50% by weight of a copolymerizable monomer, the acrylic (co)polymer having a specific viscosity of less than 0.5; (C) 10 to 90 parts by weight of an impact modifier with a multilayer structure, wherein the total of (A), (B) and (C) is 100 parts by weight and the composition has a melt flow index of 0.35 g/10 minutes to 1.4 g/10 minutes (230&#xb0; C., 3.8 kg load).

Acrylic resin composition

An acrylic resin composition suitable for the preparation of capstock for siding panels and having excellent impact resistance, weatherability and processability and a low gloss, which comprises 30 to 100% by weight of an impact modifier having a multilayer structure and 0 to 70% by weight of a methyl methacrylate homopolymer or copolymer and whose MFI (melt flow index measured according to ASTM D-1238 at 230&deg; C. and a load of 3.8 kg) is not more than 0.35 g/10 minutes.

An acrylic resin composition suitable for the preparation of capstock for siding panels and having excellent impact resistance, weatherability and processability and a low gloss, which comprises 30 to 100% by weight of an impact modifier having a multilayer structure and 0 to 70% by weight of a methyl methacrylate homopolymer or copolymer and whose MFI (melt flow index measured according to ASTM D-1238 at 230&deg; C. and a load of 3.8 kg) is no more than 0.2 g/10 minutes.

A vinyl chloride resin composition containing a graft copolymer A having an average particle diameter of at least 0.15 &mgr;m, prepared by polymerizing 50 to 90% of a solid matter of a rubber latex having a glass transition temperature of at most O&deg; C., the rubber latex being prepared by polymerizing 50 to 100% of butadiene and/or alkyl acrylate, 0 to 40% of an aromatic vinyl monomer, 0 to 10% of a vinyl monomer and 0 to 5% of a polyfunctional monomer, with 10 to 50% of a mixture comprising 10 to 100% of an alkyl methacrylate, 0 to 90% of an aromatic vinyl monomer, 0 to 25% of a vinyl cyamide monomer and 0 to 20% of a vinyl monomer; a graft copolymer B having an average particle diameter of 0.05 to 0.13 &mgr;m, prepared by polymerizing 50 to 90% of the solid matter of the rubber latex with 10 to 50% of the mixture; and a vinyl chloride resin C; wherein the weight ratio of (copolymer A)/(copolymer B) is 50/50 to 90/15, and the weight ratio of (the total amount of copolymer A and copolymer B)/(vinyl chloride resin composition C) is 1/99 to 30/70; the composition being excellent in impact resistance and usable for the production of a pipe, a window frame and the like.

Growing community of inventors

Houston, TX, United States of America

Riichi Nishimura