摘要:
Disclosed herein is a liquid crystalline resin compound which includes about 100 pbw of liquid crystalline resin and about 5-200 pbw of inorganic filler, the liquid crystalline resin being composed of about 99.5-50 wt % of partially aromatic liquid crystalline polyester resin and about 0.5-50 wt % of wholly aromatic liquid crystalline polyester resin, and the inorganic filler having an average aspect ratio in the range of 3 to 25. Also disclosed is a molded article of liquid crystalline resin obtained by molding from the liquid crystalline resin compound. The resin compound is superior in flowability and the molded article has good mechanical properties, especially balanced rigidity and toughness.
摘要:
A liquid crystalline resin which comprises at least one kind of liquid crystalline polymer selected from liquid crystalline polyester and liquid crystalline polyester amide, both forming an anisotropic molten phase, and an inorganic phosphorus compound, said liquid crystalline resin having an absorbance of 0.5 or less at 380 nm when measured over an optical path length of 10 mm in a 0.5 wt % solution in a 1:1 mixed solvent of pentafluorophenol and chloroform (by weight). It is useful as engineering plastics because of improved color, heat resistance, and hydrolytic resistance.
摘要:
A liquid-crystalline resin composition comprising 100 parts by weight of a semi-aromatic liquid-crystalline polyester and/or a semi-aromatic liquid-crystalline polyester-amide, from 0.001 to 5 parts by weight of at least one or more compounds selected from phosphorous acid, hypophosphorous acid and their salts, and from 0.01 to 10 parts by weight of red phosphorus has good flame retardancy, low anisotropy, good heat resistance and good hydrolysis resistance, and is useful as engineering plastic.
摘要:
A liquid crystalline polyester composition contains 100 parts by weight of a liquid crystalline polyester (A) and 10 to 100 parts by weight of a mica (B), wherein a rate in number of mica with a ratio (d1/d2) of a long diameter (d1) to a short diameter (d2) that is greater than 2.0, to an entire content of the mica (B) contained in the liquid crystalline polyester composition is not higher than 20%.
摘要:
The present invention provides a process for producing a liquid crystalline polyester resin, wherein an acetylation reaction and an oligomerization reaction of raw materials are carried out in an acetylation reaction vessel, and then a deacetylation polycondensation of a liquid after the oligomerization reaction is carried out in a polycondensation reaction vessel, wherein the acetylation reaction vessel used is a vessel having an inner wall surface composed of an alloy containing 50% by mass or more of Ni and 10% by mass or more of Mo; and the inner wall surface of the acetylation reaction vessel is divided into three or more band-like zones arrayed in the height direction of the vessel, and the oligomerization reaction is carried out while maintaining the temperatures of each band-like zone in a particular relationship.
摘要:
A liquid crystalline polyester composition contains at least 100 parts by weight of liquid crystalline polyester having different structural units and 10 to 100 parts by weight of glass fiber, wherein the glass fiber has a weight-average fiber length (Mw) of 200 to 500 μm, and content of specific glass fiber having fiber length of not less than 1500 μm is 0.1 to 5.0 percent by weight to a total amount of the glass fiber.
摘要:
A liquid crystalline polyester composition contains at least 100 parts by weight of liquid crystalline polyester and 10 to 100 parts by weight of glass fiber, wherein the glass fiber has a weight-average fiber length of 30 to 100 μm, and content of specific glass fiber having fiber length of 300 to 500 μm is 0.1 to 5 percent by weight to a total amount of the glass fiber.
摘要:
A liquid crystalline polyester composition contains 100 parts by weight of a liquid crystalline polyester (A) and 10 to 100 parts by weight of a mica (B), wherein a rate in number of mica with a ratio (d1/d2) of a long diameter (d1) to a short diameter (d2) that is greater than 2.0, to an entire content of the mica (B) contained in the liquid crystalline polyester composition is not higher than 20%.
摘要:
A wholly aromatic liquid crystalline polyester contains 2.0 to 15.0 mole percent of a hydroquinone-derived structural unit relative to a total amount of structural units. The wholly aromatic liquid crystalline polyester has sum of an amount (a) of terminal hydroxyl group and an amount (b) of terminal acetyl group in a range of 50 to 350 equivalents/(g·10−6), and has a ratio [(a)+(b)]/(c) of the sum of the amount (a) of terminal hydroxyl group and the amount (b) of terminal acetyl group to an amount (c) of terminal carboxyl group in a range of 1.05 to 2.00.
摘要:
A liquid crystalline polyester composition contains at least 100 parts by weight of liquid crystalline polyester having different structural units and 10 to 100 parts by weight of glass fiber, wherein the glass fiber has a weight-average fiber length (Mw) of 200 to 500 μm, and content of specific glass fiber having fiber length of not less than 1500 μm is 0.1 to 5.0 percent by weight to a total amount of the glass fiber.