摘要:
The invention relates to a process for rendering flame-resistant the thermoplastic aromatic polycarbonates prepared by a solution process, characterized by dispersing an aqueous solution of salt-like flameproofing agent in a washed and neutral polycarbonate/organic solvent system.
摘要:
Phosphoric acid triesters of the formula ##STR1## are produced in two or more stages by reacting phosphorus oxyhalides, phosphorus pentahalides, phosphoric acid monoester dihalides or phosphoric acid diester halides corresponding to the following general formula:ZO PO Hal.sub.2 (ZO).sub.2 PO Halwherein Z is defined as above and Hal represents Cl and/or Br with at least one hydroxyaryl compound of the formula ##STR2## in a two-phase mixture of an organic solvent an aqueous alkaline earth metal and/or alkali metal hydroxide solution.
摘要翻译:通过使对应于以下通式的ZO PO Hal 2(ZO)2 PO Hal的卤代卤磷,五卤化磷,五氟化五磷酸,磷酸二酯二卤化物或磷酸二酯卤化物反应制备式“IMAGE”的磷酸三酯,其中Z 定义如上,Hal表示Cl和/或Br与至少一种式“IMAGE”的羟基芳基化合物在有机溶剂碱土金属水溶液和/或碱金属氢氧化物溶液的两相混合物中。
摘要:
The invention relates to highly crystalline, rapid-crystallizing, thermoplastic compositions of polyphenylene sulphides and aromatic phosphoric acid esters.
摘要:
A process for the preparation of a neutal phosphorous acid aryl ester of the general formula ##STR1## wherein a phosphorus trihalide, phosphorus acid monoester dihalide or phosphorous acid diester halide is reacted with a hydroxyaryl compound wherein an excess of hydroxyaryl compound and an excess of aqueous alkali metal hydroxide solution or suspension or alkaline earth metal hydroxide solution or suspension are employed, relative to the phosphorus halide compound, an inert water immiscible organic solvent and/or diluent is employed in an amount such that 5 to 50% strength solution of the neutral phosphorous acid aryl ester is formed and after the reaction, the organic phase is separated off and the phosphorous acid aryl ester formed is isolated by removing the solvent and/or diluent.
摘要:
A process for the production of polyamide-6 or corresponding copolyamides by hydrolytic polymerization wherein the low molecular weight secondary reaction products and the unreacted .epsilon.-caprolactam are separated off from the polyamide melt and directly condensed on the .epsilon.-caprolactam melt to be polymerized.
摘要:
The invention relates to highly crystalline, rapid-crystallizing, thermoplastic compositions of polyphenylene sulphides and carboxylic acid esters or carbonic acid esters.
摘要:
The invention relates to a process for the production of crystalline, aromatic polyether ketones in lactams as solvent. The polymers produced have a high molecular weight, high thermal stability, high resistance to the effect of chemicals and good mechanical properties.
摘要:
The invention relates to highly crystalline, rapid-crystallizing, thermoplastic compositions of polyphenylene sulphides and carboxylic acid esters.