高分子量、高浸透性聚酯乳液的研制

1前言 随着池窑生产的发展,原有的浸润剂在快速浸润性和快速浸透性方面无法得到满足.意大利DSM公司聚酯乳液是公认的喷射纱浸润剂最好的成膜剂.本项目的目的是研制出能工业化生产的与DSM公司产品质量相当的聚酯乳液,替代进口,节约外汇,满足我国池窑发展需要,争创良好的经济社会效益.     

喷射无捻粗纱浸润剂专用MC—2043聚酯乳液的研制

本文叙述了ＭＣ－２０４３聚酯乳液的生产方法、性能和应用,用喷射粗纱浸润剂制得的粗纱完全满足喷射成型的使用要求,并与国内外同类产品作了比较,各项性能达到国外先进水平。     

Copolymerization of unsaturated polyester with styrene in inverted emulsion

Copolymerization of unsaturated polyester with styrene in water-in-oil (W/O) type emulsion was carried out with the use of various basic compounds as emulsifiers. It was found that a stable, gellike W/O type emulsion of unsaturated polyester resin is formed only when pK_a's of the bases are above 6 and their concentrations are higher than some critical value. In these conditions, water can be dispersed in emulsion up to 900% to the resin. By polymerization, the stable W/O type emulsion is transformed to a white solid copolymer which is dry to the touch and which contains 90–95% of initially added water. It was confirmed that the basic compounds react with the carboxylic group of the polyester to form at the water-resin interface polyester salts, which act as true emulsifying agents. The stabilization mechanism of the emulsion at various concentrations of the polyester salt was investigated, mainly by microscopic observations, and an interpretation of the critical value of emulsifier concentration is proposed.     

Developing macromolecular therapeutics: the future drug-of-choice

Macromolecular drugs including peptides, proteins, antibodies, polysaccharides and nucleic acids have been widely used for therapy of major diseases such as carcinoma and AIDS as well as cardiovascular and neurodegenerative disorders among other medical conditions. Due to their unmatched properties of high selectivity and efficiency, macromolecular drugs have been recognized as the drug-of-choice of the future. Since worldwide progress on macromolecular therapeutics still remains in the infant stage and is therefore wide open for equal-ground competition, R&D related to macromolecular drugs should be considered as the main point of focus in China in setting up its strategic plans in pharmaceutical development. In this article, research strategies and drug delivery approaches that should be adopted to enhance the therapeutic effects of macromolecular drugs are reviewed. In addition, comments concerning how to implement such strategies to excel from competition in this challenging research field, such as the design of innovative and highly effective delivery systems of macromolecular drugs with self-owned intellectual property rights, are provided.     

Developing macromolecular therapeutics: the future drug-of-choice

Macromolecular drugs including peptides, proteins, antibodies, polysaccharides and nucleic acids have been widely used for therapy of major diseases such as carcinoma and AIDS as well as cardiovascular and neurodegenerative disorders among other medical conditions. Due to their unmatched properties of high selectivity and efficiency, macromolecular drugs have been recognized as the drug-of-choice of the future. Since worldwide progress on macromolecular therapeutics still remains in the infant stage and is therefore wide open for equal-ground competition, R&;D related to macromolecular drugs should be considered as the main point of focus in China in setting up its strategic plans in pharmaceutical development. In this article, research strategies and drug delivery approaches that should be adopted to enhance the therapeutic effects of macromolecular drugs are reviewed. In addition, comments concerning how to implement such strategies to excel from competition in this challenging research field, such as the design of innovative and highly effective delivery systems of macromolecular drugs with self-owned intellectual property rights, are provided.     

乳化液型涤纶工业丝油剂的性能及应用

开发了多元醇聚醚、多元醇脂肪酸酯、聚醚脂肪酸酯作为主要单体的乳化液型涤纶工业丝油剂,对单体的耐热性和油剂的性能进行评价,并与日本竹本公司的F7152油剂进行比较.结果表明:乳化液型涤纶工业丝油剂的单体的耐热性优良;油剂乳化液具有良好的稳定性和优良的粘度-浓度特性和粘度-温度特性,所开发的油剂与进口F7152油剂相比,具...     

PVC用大分子增塑剂的乳液法PVC用大分子增塑剂的乳液法合成及其应用研究

以苯乙烯（St）、丙烯酸丁酯（BA）和马来酸酐（MAH）为原料,采用乳液聚合法合成一种新型PVC增塑剂（St—co—BA—co—MAH）。考察了反应温度、引发剂用量、乳化剂用量以及第三单体MAH的用蕈对共聚反应的影响,确定了最优反应工艺,同时刘该助剂的结构进行了表征;考察其增塑的PVC（聚氯乙烯）材料与DOP增塑的PVC材料应用性能。结果表明：聚合反应温度为80℃,引发剂质量分数为0．8％,乳化剂质量分数为2．5％时,所得乳液的稳定性最好;当合成大分子增塑剂用量逐渐增大时,PVC试样的力学性能更好,且耐抽出性能优于使用相同量DOP增塑的PVC材料。     

世界聚酯工业发展的特点和趋势

叙述了世界聚酯及其纤维工业的发展现状和特点 ,汇集了今后发展趋势预测 ,提出了对聚酯工业未来发展的几点看法。     

阴离子水性聚酯聚氨酯乳液预聚反应条件的研究

采用聚酯多元醇(JW2503),甲苯二异氰酸酯(TDI),二羟甲基丙酸(DMPA)为基本原料,用丙酮法合成了稳定的聚酯型阴离子水性聚氨酯乳液。探讨了反应温度、反应时间、溶剂、催化剂及用量对预聚反应的影响。实验结果表明,以丙酮为溶剂,催化剂二月桂酸二正丁基锡的用量为0.03％,反应温度65℃最为适宜,反应时间为2h。     

超高浓度石蜡乳状液的研制

超高浓度石蜡乳液,是蜡含量能达到50%的同时具有良好流动性、高度分散性和稳定性等特点的白色乳液.本文以工业石蜡为主要原料,采用特殊工艺和新型复配乳化剂,最终制得了环保型超高浓度石蜡乳液.考察了乳化剂的选择及其用量、新型复配乳化剂中各组分的比例、乳化温度、乳化时间和搅拌速度对石蜡乳化效果的影响.并确定了最佳乳化工艺条件:新型复配乳化剂为7%(以总固含量为基准的质量分数),乳化时间40 mm,乳化温度为70℃,搅拌速度1700 r/min.在此条件下,石蜡乳液蜡含量为50%,且稳定性、分散性、流动性较好.关性词:石蜡乳液;浓缩乳化;乳化剂     

PCT高性能聚酯工程塑料

综述了以环己烷二甲醇与对苯二甲酸二甲酯合成PCT(聚对苯二甲酸环己烷二甲醇酯)树脂及其本体树脂PCT的加工技术(包括GFRPCT、共混等),对PCT树脂的物理、机械性能及其典型应用也作了介绍。