摘要:
A sensor arrangement including a probe and a bracket that are provided for a calorimetric mass flow meter for measuring the mass flow in a measuring tube. The probe is mounted in the bracket in such a manner that the probe is guided essentially without contact with a radial spacing through a probe recess a wall of the measuring tube and is positioned in a cross section of a flow-through area of the flow of the measuring tube. The bracket is designed in such a manner that the probe is thermally de-coupled from the measuring tube. The sensor arrangement for the calorimetric mass flow meter is capable of increasing the measuring accuracy and increasing the flexibility during operation.
摘要:
The present invention relates to non-aging, impact-modified polycarbonate compositions and molding compositions comprising: A) from 60 to 86 parts by weight (based on the sum of components A+B+C) of aromatic polycarbonate and/or aromatic polyester carbonate, B) from 4 to 12 parts by weight (based on the sum of components A+B+C) of graft polymer comprising: B.1 from 10 to 50 wt. % (based on the graft polymer B) of a shell of at least one vinyl monomer, and B.2 from 90 to 50 wt. % (based on the graft polymer B) of a graft base of silicone-acrylate composite rubber, C) from 10 to 30 parts by weight (based on the sum of components A+B+C) of a polymer or copolymer based on vinyl monomer, and D) from 0 to 20 parts by weight of polymer additives. Components B and C are present in a ratio of the parts by weight of B:C in the range from 1:1.3 to 1:3.5. A composition of the present invention is generally free of inorganic fillers, and is distinguished by an improved balance of multiaxial low-temperature impact strength and flowability, good dyeability and a high heat distortion resistance.
摘要翻译:本发明涉及非老化,抗冲击改性的聚碳酸酯组合物和模塑组合物,其包含:A)60至86重量份(基于组分A + B + C的总和)芳族聚碳酸酯和/或芳族聚酯碳酸酯 ,B)4至12重量份(基于组分A + B + C的总和),接枝聚合物包含:B.1 10至50重量% 至少一种乙烯基单体的壳的%(基于接枝聚合物B),B.2为90至50wt。 基于硅氧烷 - 丙烯酸酯复合橡胶的接枝基质的%(基于接枝聚合物B)C)基于乙烯基的聚合物或共聚物的10至30重量份(基于组分A + B + C的总和) 单体和D)0至20重量份的聚合物添加剂。 组分B和C以B:C重量份的比例在1:1.3至1:3.5的范围内存在。 本发明的组合物通常不含无机填料,其特征在于多轴低温冲击强度和流动性,良好的可染性和高耐热变形性的平衡。
摘要:
The present invention relates to a process for the production of impact-modified filled polycarbonate compositions and molding compositions. A process of the present invention involves: (i) mixing the CNT (component C) with rubber-containing vinyl copolymer (component B) and/or rubber-free vinyl copolymer (component D) on a twin screw extruder, to obtain a CNT masterbatch, (ii) mixing the CNT masterbatch with polycarbonate (component A) and optionally with Component B and/or Component D and optionally with an additive on a twin screw extruder. A polycarbonate composition prepared according to the present invention does not experience degradation of the molecular weight of the polycarbonate during compounding a compared to processes known in the art.
摘要:
Methods for racemate separation for compound-forming substances. In this method, at least one fraction which is enriched with an enantiomer is produced in one method step. Finally, a preferred crystallization is carried out on the fraction.
摘要:
The present invention relates to flame-protected impact-modified polycarbonate compositions, wherein the compositions are free of rubber-free polyalkyl (alkyl)acrylate. The present invention further relates to the use of the polycarbonate compositions in the production of moulded bodies, and to the moulded bodies themselves.
摘要:
The present invention relates to a compounding method for producing impact-modified thermoplastic compositions with a low content of volatile organic compounds (hereinafter VOCs), wherein relatively inexpensive polymer raw materials with a comparatively elevated initial VOC content may be used, resulting in lowered production costs for producing such VOC-reduced polymer compositions.
摘要:
An impact modified thermoplastic molding composition comprising aromatic polycarbonate and/or polyester carbonate and a rubber-modified graft polymer prepared by the bulk, solution or bulk-suspension polymerization process is disclosed. The composition that is characterized by its low content of lithium ions and its content of sodium and/or potassium ions exceeding a minimum level features improved hydrolytic resistance.
摘要:
Impact-modified polycarbonate compositions are disclosed that comprise a first graft polymer based on silicone-acrylate composite rubber as graft base, wherein the amount of silicone rubber is from 65 to 95 wt. % (based on the graft base), and a second graft polymer containing free copolymer, that is to say copolymer that is not chemically bonded to the rubber, and having a weight-average molecular weight of from 60,000 to 150,000 g/mol. The use of the polycarbonate compositions in the production of moulded articles, and to the moulded articles themselves are also disclosed. The compositions and moulding compositions have an optimum combination of good elongation at tear, good hydrolytic stability and low melt viscosity.
摘要:
The present invention relates to a polycarbonate composition comprising polyalkyl(alkyl)acrylate having a specific molecular weight and an impact modifier, as well as to moulded bodies obtainable from these compositions. Compositions according to the present invention exhibit superior properties, in particular with respect of low-temperature strength and melt flowability.
摘要:
The present invention relates to filled, impact-modified polycarbonate compositions containing A) aromatic polycarbonate and/or aromatic polyester carbonate, B) a first graft polymer of B.1 from 0.1 to 30 wt. % of at least one vinyl monomer on B.2 from 99.9 to 70 wt. % of one or more graft bases having glass transition temperatures