Abstract:
The present invention relates to a process for preparation of polysulphones with Yellowness Index to DIN 6167 smaller than 19 and of polyether sulphones with Yellowness Index to DIN 6167 smaller than 30, characterized in that the polymerization reaction is carried out in basic, aprotic solvents, using a mechanical agitator which passes close to the wall. The present invention also relates to the polyether sulphones and polysulphones obtainable for the first time by this process, and to the use of these polymers for production of mouldings, foils, membranes and foams.
Abstract:
The invention relates to a method for drying particulate polymers, having the following steps: a) providing a particulate polymer which contains 60 wt.% to 90 wt.% of at least one solvent, based on the total weight of the particulate polymer and the solvent, b) mechanically pre-drying the particulate polymer to 20 wt.% to 50 wt.% of the at least one solvent, based on the total weight of the particulate polymer and the solvent, wherein the mechanical pre-drying in step b) is carried out using a rolling press, and c) final drying the particulate polymer to 0 wt.% to 15 wt. of the at least one solvent, based on the total weight of the particulate polymer and the solvent. The particular polymer is a polymer which contains the repeating units of the formulas (I), (II) and/or (II). The invention further relates to a method for processing particulate polymers.
Abstract:
The invention relates to a method for producing polyarylene ether beads from a polyarylene ether solution, having the steps of i) separating the polyarylene ether solution into drops and ii) transporting the drops into a precipitation bath, thereby forming polyarylene ether beads in the precipitation bath. The precipitation bath (A) contains at least one aprotic solvent (component (1)) and at least one protic solvent (component (2)), (B) has a temperature of 0 °C to T c , the critical temperature T c in [°C] being determined by the numerical equation T c = (99 - c)/0.61, in which c is the concentration of the component (1) in the precipitation bath in [wt.%], and (C) has the component (1) in concentrations of 5 wt.% to c c , the critical concentration c c in [wt.%] being determined by the numerical equation c c = 99 - 0.61 * T, in which T is the temperature in the precipitation bath in [°C], wherein the wt.% in each case is based on the sum of the wt.% of the component (1) and the component (2) in the precipitation bath.
Abstract translation:本发明涉及由聚亚芳基醚溶液生产聚亚芳基醚珠粒的方法,其具有以下步骤:i)将聚亚芳基醚溶液分离成液滴,和ii)将液滴输送到沉淀浴中,从而在沉淀浴中形成聚亚芳基醚珠粒 。 沉淀浴(A)含有至少一种非质子溶剂(组分(1))和至少一种质子溶剂(组分(2)),(B)具有0℃至T c的温度,临界温度T c (℃)由数学式T c =(99-c)/0.61确定,其中c是沉淀浴中组分(1)的浓度[重量%],(C)具有 组分(1)的浓度为5重量%至cc,临界浓度cc(以重量%计)由数学式cc = 99-0.61 * T确定,其中T是沉淀浴中的温度 [℃],其中各种情况下的重量%基于沉淀浴中组分(1)和组分(2)的重量%之和。
Abstract:
The invention relates to a method for producing polyarylene ether beads from a polyarylene ether solution, having the steps of i) separating the polyarylene ether solution into drops and ii) transporting the drops into a precipitation bath, thereby forming polyarylene ether beads in the precipitation bath. The precipitation bath (A) contains at least one aprotic solvent (component (1)) and at least one protic solvent (component (2)), (B) has a temperature of 0 °C to T c , the critical temperature T c in [°C] being determined by the numerical equation T c = (77 - c)/0.58, in which c is the concentration of the component (1) in the precipitation bath in [wt.%], and (C) has the component (1) in concentrations of 5 wt.% to c c , the critical concentration c c in [wt.%] being determined by the numerical equation c c = 77 - 0.58 * T, in which T is the temperature in the precipitation bath in [°C], wherein the wt.% in each case is based on the sum of the wt.% of the component (1) and the component (2) in the precipitation bath.
Abstract translation:本发明涉及由聚亚芳基醚溶液生产聚亚芳基醚珠粒的方法,其具有以下步骤:i)将聚亚芳基醚溶液分离成液滴,和ii)将液滴输送到沉淀浴中,从而在沉淀浴中形成聚亚芳基醚珠粒 。 沉淀浴(A)含有至少一种非质子溶剂(组分(1))和至少一种质子溶剂(组分(2)),(B)具有0℃至T c的温度,临界温度T c (℃)由数学式T c =(77-c)/0.58确定,其中c是沉淀浴中组分(1)的浓度[重量%],(C)具有 组分(1)的浓度为5重量%至cc,临界浓度cc以[重量%]由数值方程cc = 77-0.58 * T确定,其中T是沉淀浴中的温度 [℃],其中各种情况下的重量%基于沉淀浴中组分(1)和组分(2)的重量%之和。
Abstract:
The present invention relates to a method for producing low-halogen polybiphenylsulfone polymers, the polybiphenylsulfone polymers that can be obtained in this way, polybiphenylsulfone polymers having a content of polymer-bound halogen of less than 400 ppm, thermoplastic molding compounds containing said polybiphenylsulfone polymers, and the use thereof for producing molded bodies, fibers, films, membranes, or foams.
Abstract:
A thermoplastic molding material comprising: A) from 40 to 97.9% by weight of at least one polyether sulfone, B) from 2 to 59.9% by weight of at least one polysulfone, C) from 0.1 to 2% by weight of stearic acid, and optionally further additives and assistants, has an improved flowability, surface quality and notched impact resistance, and can be used to construct floodlights.