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:
The present invention relates to a shaped article of a liquid crystalline polymer containing (A) 100 parts by weight of a liquid crystalline polyester and/or liquid crystal polyesteramide capable of forming an anisotropic melt and (B) 0.01 to 2 parts of an olefinic polymer and having a retention rate of a weld strength of 15% to 100%, which has excellent heat stability, mechanical properties, dimensional stability and mold releasability and is suitable for various application uses such as electrical and electronical related devices, accurate machine related devices, office related devices, automobile related parts.
摘要:
A thermotropic resin composition containing (A) 100 parts by weight of a thermotropic polyester, a thermotropic polyesteramide or a mixture thereof, forming an anisotropic molten phase and (B) 1 to 200 parts by weight of a graphite having a fixed carbon content of 98% or more, a crystallinity of 80 to 95%, and an average particle size of 1 to 200 .mu.m.
摘要:
The present invention relates to (A) 100 parts by weight of a liquid crystal polyester and/or liquid crystal polyesteramide capable of forming an anisotropic melt and (B) a liquid crystal polymer composition containing 5 to 300 parts by weight of a potassium titanate whisker having a pH of 6 to 8, wherein, the melt viscosity of the composition is 12 to 300 Pa.multidot.sec, and the weight average fiber length of the potassium titanate whisker in the composition is at least 4.5 .mu.m, the liquid crystal polymer composition having low anisotropy as well as balanced properties of superior dimensional stability, lubricating property (wear resistance), thin-wall moldability, heat resistance and mechanical properties, thereby allowing it to be useful as electrical and electronic parts, automotive parts, audio parts and various types of machine parts, and particularly as bearing and wear applications required to have lubricating property (wear resistance).
摘要:
The present invention relates to a shaped article of a liquid crystalline polymer containing (A) 100 parts by weight of a liquid crystalline polyester and/or liquid crystal polyesteramide capable of forming an anisotropic melt and (B) 0.01 to 2 parts of an olefinic polymer and having a retention rate of a weld strength of 15% to 100%, which has excellent heat stability, mechanical properties, dimensional stability and mold releasability and is suitable for various application uses such as electrical and electronical related devices, accurate machine related devices, office related devices, automobile related parts.
摘要:
A polyester composition according to the subject invention is composed of thermoplastic polyesters and the titanium dioxide and/or aluminum oxide having specific particle diameters.The polyester composition provides the molded articles which display reduced warpage.The polyester composition has high plating characteristic and provide superior metal-plated moldings.
摘要:
The present invention relates to polyesters capable to give moldings having excellent flow characteristics, heat resistance and mechanical properties.These polyesters are prepared by copolymerizing specified amounts of specific dioxycompounds such as t-butylhydroquinone, phenylhydroquinone and so on with polyesters comprising specified amounts of p-hydroxybenzoic acid, 4,4'-dihydroxybiphenyl, hydroquinone and terephthalic acid or terephthalic acid and isophthalic acid.
摘要:
A flame-retardant thermotropic polyester composition comprising 100 parts by weight of thermotropic polyester (A) and 0.5 to 60 parts by weight of poly(bromostyrene)(B) having the following structural unit produced from bromostyrene monomer, as the principal structural component thereof, and having a number average molecular weight of 1.times.10.sup.3 to 30.times.10.sup.4 ; ##STR1## has excellent flame retardancy, mechanical properties and heat resistance, and the shaped articles molded from the composition has also superior appearance.