Abstract:
PROBLEM TO BE SOLVED: To prevent a molecular weight of an organic polymer from being lowered, when a polymer composite is produced from the organic polymer and alumina particles at a nano-order level having a major axis of 10-500 nm, and to prevent mechanical characteristics, such as impact resistance, of the polymer from being deteriorated, nor transparency thereof from being deteriorated by discoloration. SOLUTION: A method for producing the polymer composite comprises drying absorbed water contained in the alumina particles having the major axis of 10-500 nm, so as to attain a loss on heating to 150°C from room temperature of not more than 2 wt%, and then mixing the dried alumina particles with the organic polymer, so as to form them into the composite. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a thermoplastic resin composition containing an aromatic polycarbonate resin and particles of a metal oxide which is exemplified by silica, having a low coefficient of linear expansion, and having high transparency at the same time, while keeping stability in quality and processability in plastic molding. SOLUTION: This thermoplastic resin composition contains the aromatic polycarbonate resin and the particles of the metal oxide, wherein the thermoplastic resin composition has a total light transmittance of ≥ 70%, when measured after molded into a molded product having a thickness of 1mm, and a coefficient of linear thermal expansion of 30-60 ppm/K, when measured by being raised in its temperature from 30°C to 80°C, and a chloroform-soluble component of the composition has a weight-average molecular weight in a range of 7×10 4 to 700×10 4 . COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To uniformly disperse metal oxide particulates into the polycarbonate resin composition during a polycarbonate resin composition manufacturing process using melt polymerization, to improve the degree of polymerization of the polycarbonate resin constituting the polycarbonate resin composition, and to improve the mechanical strength, heat resistance, impact resistance, transparency, and dimensional stability of the polycarbonate resin composition. SOLUTION: A sol of metal oxide particulates is prepared, with its pH adjusted to be 6-8, and is mixed into a dicarbonate compound and into a diol compound. Melt polymerization of the two compounds is carried out for obtaining a polycarbonate resin composition with metal oxide particulates dispersed therein. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide surface-coated aluminum oxide nanoparticles which can be evenly incorporated into a polycarbonate resin in a satisfactorily dispersed state while keeping the molecular weight of the polycarbonate resin on at least a specific level, and a highly transparent polycarbonate resin composition which contains the surface-coated aluminum oxide nanoparticle and is excellent in mechanical strength, dimensional stability and thermal stability. SOLUTION: The surface-coated aluminum oxide nanoparticles have their surfaces coated with a dispersant and a silylating agent. When a sample surface is irradiated with a monochromatized Al-Kα line using an X-ray photoelectron spectroscope to calculate surface element proportions from the areas of the resultant photoelectron peaks, the contents (atm%) of nitrogen atoms, sulfur atoms derived from thiol groups and halogen atoms are each 2 or lower. When surface element proportions are calculated from the areas of the resultant photoelectron peaks attributable to Al2p and Si2s, the concentration of silicon atoms (mol%) is 0.05-30 based on the aluminum atoms. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide inorganic fine particles in nanometer order level having excellent dispersibility to a resin, and a resin composition using the same which has high mechanical properties such as elasticity, has a low coefficient of linear expansion, and is excellent in transparency. SOLUTION: The resin composition is obtained by blending and dispersing, into a resin, a particulate metal oxide derivative comprising a metal oxide (A), a compound (B) having the ability of forming a first chemical bond to the metal oxide (A), and a compound (C) having the ability of forming a second chemical bond to the compound (B) and also having miscibility with the resin. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a resin composition which includes high aspect ratio metal oxide particles being uniformly dispersed and is excellent in both the mechanical properties and transparency. SOLUTION: The resin composition comprises a resin and a metal oxide particle composite incorporated in the resin, in which the metal oxide particle composite comprises an organic phosphorus compound chemically bonded to the metal oxide particle. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a resin composition in which both of mechanical properties and optical properties are excellent. SOLUTION: A metal oxide particle composite provided with metal oxide particles and organic acid salt comprised through surface treatment to the metal oxide particles is incorporated into a resin, so as to be the resin composition. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a dispersant for inorganic fillers of a polycarbonate composition which is excellent in dispersing inorganic micro-particles at a nanometer order level and most suitable for the polycarbonate compositions having a sufficient degree of polymerization and excellent transparency. SOLUTION: The dispersant for inorganic fillers of the polycarbonate composition contains a polycarboxylic acid and a polycarbonate and is prepared by ester-bonding and grafting at least part of the COOH groups in the polycarboxylic acid with the polycarbonate. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a polycarbonate resin-based resin composition excellent in physical properties including mechanical strength, dimensional stability and heat resistance and having excellent transparency and color tone. SOLUTION: The resin composition comprises a polycarbonate resin and metal oxide particles dispersed in the polycarbonate resin, wherein at least one kind of aliphatic hydrocarbon group and at least one kind of aromatic hydrocarbon group are bound onto the surface of the metal oxide particles. COPYRIGHT: (C)2006,JPO&NCIPI