Abstract:
A polyamide resin composition comprised 100 parts by weight of a polyamide resin, from 0.01 to 100 parts by weight of a liquid-crystalline resin, and from 0.01 to 5 parts by weight of an acid anhydride. A box-type molding with thin-wall parts which account for at least 10% of the total surface area can be molded from such a composition.
Abstract:
A polyamide resin composition comprised 100 parts by weight of a polyamide resin, from 0.01 to 100 parts by weight of a liquid-crystalline resin, and from 0.01 to 5 parts by weight of an acid anhydride. A box-type molding with thin-wall parts which account for at least 10% of the total surface area can be molded from such a composition.
Abstract:
A liquid-crystalline resin with ester bonds has a terminal hydroxyl concentration of not less than 15 x 10 equivalent/g. It can be incorporated in a thermoplastic resin composition.
Abstract:
A liquid-crystalline resin with ester bonds has a terminal hydroxyl concentration of not less than 15 x 10 equivalent/g. It can be incorporated in a thermoplastic resin composition.
Abstract:
PROBLEM TO BE SOLVED: To provide a method for the separation and purification of a 4,4'- biphenyldiphosphinic acid free from impurities such as biphenylmonophosphinic acid and a position isomer of 4,4'-biphenyldiphosphinic acid. SOLUTION: A biphenylphosphinic acid mixture composed of a compound of formula (I) and a compound of formula (II) is separated and purified by using a ketone-based solvent.
Abstract:
PROBLEM TO BE SOLVED: To obtain the subject composition capable of inhibiting the generation of a low boiling gas by-produced when heated or melted, thereby capable of preventing a trouble such as the surface discoloration of a molded product due to the generated gas and useful for electric or electronic related devices, etc., by including a specific silicon compound in a specified amount to a liquid crystalline resin such as a liquid crystal polyester. SOLUTION: This liquid crystalline resin composition comprises (A) 100 pts.wt. of a liquid crystalline resin comprising a liquid polyester and/or a liquid crystalline polyesteramide and preferably containing ethylenedioxide units as an essential component, and (B) 0.001-10 pts.wt. of a silicon compound having an oil absorption of >=150 ml/g and a pH of 7.0-9.0. The component B preferably has an average particle diameter of 1-15 μm and an average pore diameter of 50-300 angstrom, and preferably comprises the reaction product of sodium silicate with sulfuric acid. The component A is obtained, for example, by polycondensing p-hydroxybenzoic acid, terephthalic acid, polyethylene terephthalate, etc.
Abstract:
PROBLEM TO BE SOLVED: To obtain a liquid crystal resin composition useful for electric or electronic parts or the like having excellent thin fluidity, size stability, mechanical properties and electric properties by compounding a liquid crystal resin with a quartz glass fiber at a specific ratio. SOLUTION: This liquid crystal resin composition is composed of (A) a liquid crystal resin such as a liquid crystal polyester, a liquid crystal polyesteramide or the like in an amount of 100 pts.wt. and (B) a quartz glass fiber having the surface treated with a coupling agent such as a silane compound and having a coefficient of linear expansion of
Abstract:
PROBLEM TO BE SOLVED: To provide a thermoplastic resin for a lens having a high refractive index and a high Abbe's number with improved color tone. SOLUTION: This resin comprises a phosphonic residue expressed by the formula (1) (R is a 1-20C hydrocarbon group; X denotes oxygen, sulfur or selenium), a bivalent phenolic residue expressed by the formula (2) (R's are each independently selected from the group consisting of a hydrogen atom, a 1-20C aliphatic hydrocarbon group, a 1-20C aromatic hydrocarbon group, a halogen atom and a nitro group; p and q are each an integer satisfying p+q=0 to 8; Y is selected from the group consisting of a single bond, an oxygen atom, a sulfur atom and a specified substituent group) and a carbonate residue, the mole fractions of the phosphonic residue and the carbonate residue satisfy the inequality (3): 1>(a)/[(a)+(b)]≥0.05 (wherein (a) and (b) denote mole numbers of the phosphonic residue and the carbonate residue, respectively.) and the content of sodium is less than 5 ppm. COPYRIGHT: (C)2003,JPO
Abstract:
PROBLEM TO BE SOLVED: To obtain the subject composition, formable without releasing much gases, prevented from swelling during an annealing process, excellent in fluidity and useful for compact formed articles, e.g. those for electrical/electronic devices and office devices by including a specific amount of a thermoplastic resin having a specific lower limit of forming temperature and a specific amount of a diphenoxybenzene bromide. SOLUTION: This compound is obtained by including (A) a thermoplastic resin, preferably a liquid-crystalline resin and more preferably a liquid-crystalline polyester and/or polyester amide containing an ethylene dioxy unit as the essential component, having a lower limit of forming temperature of 270 deg.C or more at above 50 wt.% but 99.99 wt.% or less, (B) a diphenoxybenzene bromide at 0.01 wt.% or more below 50 wt.%, and, as required, (C) 1 to 300 pts.wt. of a filler per 100 pts.wt. of the components A and B combined.