摘要:
The present invention provides a liquid-crystalline polyester resin, essentially consisting of the repeating units represented by formulae [I]-[IV]: wherein p, q, r and s satisfy the following formulae: 0.4≦p/q≦2.0, 2≦r≦15, 2≦s≦15, and p+q+r+s=100, provided that the liquid-crystalline polyester resin has a melting point of 190-250° C. determined by differential scanning calorimetry. The liquid-crystalline polyester resin of the present invention exhibits a good molding processability at low temperatures and excellent mechanical properties.
摘要翻译:本发明提供了一种液晶聚酯树脂,其基本上由式[I] - [IV]表示的重复单元组成:其中p,q,r和s满足下式:0.4 <= p / q <= 2.0 ,如果液晶聚酯树脂的熔点为190-250℃,则通过差示确定,2 <= r <= 15,2 <= s <= 15和p + q + r + s = 扫描量热法。 本发明的液晶聚酯树脂在低温下表现出良好的模塑加工性能和优异的机械性能。
摘要:
The present invention provides a liquid-crystalline polyester resin which comprises monomer units derived from 2-hydroxy-3-naphthoic acid and/or 2-hydroxynaphthalene-3,6-dicarboxylic acid in an amount of 1-5000 mmol % based on the total monomer components of the resin and an alkaline metal compound in an amount of 10-3000 ppm as alkaline metal based on the total monomer components of the resin. The liquid-crystalline polyester resin of the present invention has good colorability, improved heat resistance and good mechanical properties.
摘要:
A liquid crystal polyester resin comprising 1 to 500 mmol % of a recurring unit derived from 4-hydroxyisophthalic acid and/or salicylic acid as a comonomer and 10 to 5,000 ppm in terms of an alkali metal of an alkali metal compound. This resin has excellent colorability, improved heat resistance and high mechanical properties.
摘要:
Provided is a liquid crystalline polymer which is obtained by copolymerizing at least one polyfunctional aromatic monomer selected from the group consisting of the compounds represented by the formulae (I), (II) and (III) below with at least one polymerizable monomer. The liquid crystalline polymer of the present invention is excellent in heat resistance, molding properties, flow properties and mechanical properties, especially it provide molded article with improved weld strength.
摘要:
A process for producing an azo pigment, which comprises coupling an aromatic diazonium compound with 3-hydroxy-2-naphthoic acid and at least one binaphthol and optionally, laking the resulting pigment.
摘要:
A crystalline mixture solid containing maltitol having an oil absorptivity of 0.1 to 6.9 wt % and a bulk density of 0.60 to 0.75 g/cc when it is ground and classified to ensure that at least 70 wt % of the obtained particles should have a particle size of 16 to 50 mesh and a process for producing a crystalline mixture solid containing maltitol, comprising introducing air bubbles into a maltitol aqueous solution. According to this process, a crystalline mixture solid containing maltitol having high solubility and almost no moisture absorption is produced at a high work efficiency and a low cost in a short period of time.
摘要:
The present invention provides new compounds, 13,14-dihydro-15-keto-PGFs, and vassopressors containing them, which raise blood pressure without substantial ephemeral depression of blood pressure, trachea or enteron contraction effect inherent in usual PGFs.
摘要:
The present invention relates to ocular hypotensive agents which contains 13,14-dihydro-15-keto-prostagrandins, which shows no transient ocular hypertensive response that PGs usually show.
摘要:
The present invention relates to an ocular hypotensive composition and a composition for treatment of glaucoma which comprising an amount of 20-substituted-PGs or 20-substituted-15-keto-PGs effective as an ocular hypotensive agent; these compounds exhibit no or little side effects such as transient ocular hypertensive response, hyperemia of conjunctiva or of iris, dacryops, lema, closed eye and the like.