顺酐聚酯多元醇的合成及应用研究

制备出一种新型聚氨酯漆包线漆。将顺酐、乙二醇、甘油进行共缩聚,合成出一种顺酐聚酯多元醇,然后与异氰酸酯交联剂配合制备出漆包线漆。研究表明:采用顺酐、甘油、乙二醇在200℃反应约3 h,再采用二甲苯共沸回流40 min,制备出一种酸值1.2、熔点40~50℃、数均分子质量4 396、无色透明的顺酐聚酯多元醇;所制备漆包铜线的直焊温度为330℃,软化击穿温度为230℃,击穿电压5.3 kV,介质损耗曲线的拐点温度值达到145℃。     

电绝缘涂料

200901067 电子品用耐热电绝缘涂料组合物;200901068 可直焊聚酯亚胺漆包线漆及其制备方法;200901069 耐高温环保型漆包线热熔自粘漆的制备方法;200901070 一种耐高温绝缘漆及耐高温无磁性漆包线及其制备方法。     

THEIC改性F级聚酯亚胺漆包线漆

自七十年代以来,国外普遍应用的耐热漆包线漆是THEIC改性聚酯亚胺漆包线漆。在这种漆的分子结构中引入了热稳定的含三嗪环的三(2-羟乙基)异氰尿酸酯(THEIC)来部分或完全取代丙三醇。此漆涂制的漆包线,具有较高的耐热性和热冲击性,耐热等级155℃(F级)以上,软化击穿温度高,与浸渍漆相容性良好,机械强度和耐冷冻剂等性能亦较好。本文主要研究根据F级聚酯亚胺漆包线的性能要求在聚酯亚胺分子结构中引入含三嗪环的THEIC。     

聚酯废料生产高强度漆包线漆

高强度聚酯漆包线漆是一种耐磨、耐热、电性能很高的绝缘材料,它是由对苯二甲酸和乙二醇缩聚而成的高分子聚合物(俗称绦纶)。生产每吨漆包线漆耗聚对苯二甲酸乙二醇树脂30％～40％。若用废聚酯代替价格昂贵的聚对苯二甲酸乙二醇树脂.不论从工艺、设备,还是经济效益都有广阔的推广应用前     

草酸二乙二醇的合成及其在聚酯多元醇制备中的应用

提出了一种草酸聚酯多元醇的制备方法。首先采用草酸和乙二醇反应制备草酸二乙二醇单体,然后与甘油、苯酐进行共缩聚制备目标产物。研究表明:采用草酸和乙二醇为反应物、环己烷为反应介质,二氯化亚锡为催化剂,在50~60℃下,持续回流分水3 h,制得一种草酸二乙二醇单体,产率达97%。将草酸二乙二醇、甘油、苯酐在200℃下进行熔融共缩聚制备出一种数均和重均分子量分别为4357和9150、酸值为1.0、无色透明黏性的草酸聚酯多元醇。它的热稳定性及各项参数相近于相同条件下制备的己二酸聚酯多元醇。     

用二苯基丙烷结构提高聚酯电磁线漆耐热性能的研究

研究了在改性聚酯树脂中引入二苯基丙烷结构来提高其耐热性能,制成的耐热聚酯电磁线漆作底漆与聚酰胺酰亚胺电磁线漆配合使用,涂制的QZY／XY-200级复合漆包线热软化温度可以达到380℃,热冲击性能在漆包线拉伸10％、240℃、30min条件下1d不开裂,提高了特种电机的耐高温工作能力。     

新型F级聚氨酯漆包线漆的合成及性能研究

聚氨酯漆包线漆具有绝缘性和直焊性优良、热稳定性及染色性能好等特点，广泛用于焊点较多的彩电、仪表、计算机等行业。利用聚氨酯预聚体中的异氰酸酯基自身的三聚反应来提高漆膜耐热等级，对这种聚氨酯漆的合成和性能作了较系统的研究，得到了一种新型Ｆ级聚氨酯漆包线漆。     

无溶剂蓖麻油聚酯多元醇的合成及应用研究

以蓖麻油、甘油、己二酸和乙二醇为原料,酯化缩聚合成低黏度的蓖麻油聚酯多元醇,并将该蓖麻油聚酯多元醇与HDI聚异氰酸酯制备无溶剂涂料。研究了醇酸比[n(—OH)：n(—COOH)]对蓖麻油聚酯多元醇及其涂层性能的影响。结果表明：在醇酸比为1.32时,蓖麻油聚酯多元醇所制涂层的耐水性、耐冲击性、耐擦伤性、柔韧性等综合性能良好。     

蓖麻油酸基聚酯多元醇的合成研究

以可再生资源蓖麻油制备的蓖麻油甲酯、己二酸、乙二醇为原料,钛酸四正丁酯为催化剂,经酯化、缩聚合成蓖麻油酸基聚酯多元醇,考察了反应时间、催化剂、蓖麻油甲酯对聚酯多元醇热稳定性能的影响,采用凝胶色谱(GPC)、红外光谱仪(IR)、示差扫描量热仪(DSC)对蓖麻油酸基聚酯多元醇的相对分子质量、结构、热稳定性进行了系统的表征。实验表明,在醇酸(己二酸∶乙二醇)比为1.15、催化剂质量分数0.04%～0.05%、温度180℃,真空缩聚2h的条件下,制得相对分子质量为2600～3800、分布指数(PDI)为1.89～2.44的不同蓖麻油酸含量的聚酯多元醇,蓖麻油酸基聚酯多元醇的熔点随着蓖麻油酸含量的增加而降低。     

生物基聚对苯二甲酸多元醇酯的结构及性能研究

以精对苯二甲酸(PTA)和生物基乙二醇(BioEG)为原料,在酯化阶段添加多元醇,采用直接酯化法合成生物基聚对苯二甲酸多元醇酯,分析了BioEG的成分,研究了生物基共聚酯的结构及性能。结果表明:PTA∶BioEG摩尔比为1.0∶1.2,多元醇摩尔分数(相对PTA)为0~0.6%,合成的生物基共聚酯具有较好的热稳定性和亲水性能;多元醇参与了聚合反应,产物中存在羟基基团;相比石油基聚酯,生物基共聚酯的特性黏数略低,熔点低10~20℃,结晶度略有下降,起始分解温度为421~424℃,与水的表面接触角为75°~81°。     

Polyurethanes synthesized from polyester polyols derived from PET waste. II. Thermal properties

Polyurethanes were synthesized from polyester polyols, derived from PET Waste. The PET waste was first depolymerized by glycolysis. The glycolysized products were reacted with adipic acid to yield polyester polyols, and the polyester polyols were then reacted with either MDI or TDI to obtain polyurethanes. In this article, the thermal properties of the polyurethanes obtained are discussed in detail. © 1994 John Wiley & Sons, Inc.     

Comparison of Adipic Versus Renewable Azelaic Acid Polyester Polyols as Building Blocks in Soft Thermoplastic Polyurethanes

In this study, novel polyester diols of 2000 molecular weight (MW) were synthesized by reacting azelaic acid (AZ) with 1,3‐propanediol (1,3‐PDO) and diethylene glycol (DEG) in the esterification reaction catalyzed with a small amount of butyltintris(2‐ethylhexanoate). As a reference, polyester polyols of 2000 MW were synthesized from adipic acid (AA) with 1,3‐PDO and DEG. The properties of polyester polyols were evaluated. The polyester polyol based on AZ and 1,3‐PDO is 100 % renewable polyol; 1,3‐PDO used in the syntheses is renewable product produced by fermentation process of sugar. Both 1,3‐PDO‐polyester polyols exhibited crystalline transition above room temperature, while DEG‐polyester polyols were liquid at room temperature. The polyester polyols were chain‐extended with 4,4′‐diphenylmethane diisocyanate (Mondur M) and 1,4‐butanediol (BDO) to form thermoplastic polyurethanes (TPU). TPU were evaluated for mechanical and water resistance properties, and their morphology were studied via differential scanning calorimetry (DSC), Fourier transform infrared (FTIR), and atomic force microscope (AFM). TPU based on azelate and adipate polyols were relatively soft elastomeric materials with high melting temperatures. AFM analyses of TPU indicated better phase separation in 1,3‐PDO polyester polyols with the highest phase separation observed in TPU based on 1,3‐PDO/azelaic acid polyols. Water resistance of TPU based on azelate polyols was improved as compared to TPU based on adipate polyols.     

聚酯漆包线用漆和漆包工艺要求

从叙述聚酯漆的制备机理入手,联系漆包线生产的工艺流程,分析了聚酯漆膜的形成过程,并根据工艺特点对漆料提出了具体的技术要求.最后讨论了聚酯漆的稀释工艺、漆包线质量和漆料的关系.     

Preparation of polyurethane wood adhesives by polyols formulated with polyester polyols based on castor oil

The aim of this work was the synthesis of polyester polyols from renewable sources as one of the important compounds of polymeric polyurethane (PU) adhesives. The polyester polyols were synthesized by condensation polymerization of different dicarboxylic acids with castor oil and the reaction conditions were in agreement with green chemistry principles. The preparation of PU wood adhesives was carried out by the reaction of each obtained polyester polyol with 4, 4′-diphenylmethane diisocyanate (MDI). The adhesive performance was improved by mixing the obtained polyester polyols with polypropylene glycol (PPG 400) and butanediol (BD). Different NCO/OH ratios were used to obtain adhesives with appropriate properties. The structures of the synthesized polyesters and adhesives were characterized by FTIR, thermogravimetric analysis (TGA) and lap shear strength values were also determined in various conditions such as cold water, hot water, acid and alkali solutions.     

植物油基聚酯酰胺多元醇的合成及其在水性聚氨酯中的应用

以菜籽油和二乙醇胺为原料制备了脂肪醇酰胺混合多元醇RDEA,进一步和己二酸等原料反应合成了系列的聚酯酰胺多元醇,并对两类多元醇进行了表征。以聚酯酰胺多元醇、二羟甲基丙酸、异佛尔酮二异氰酸酯、苯乙烯和丙烯酸丁酯等原料合成了水性聚氨酯脲（PUU）分散液及聚氨酯脲-乙烯基聚合物（PUA）复合水分散液,并对其流变性能及稳定性进行了研究。     

Influence of cycloaliphatic compounds on the properties of polyurethane coatings

A series of polyester polyol resin was synthesized by using 1,4-cyclohexanedimethanol (1,4-CHDM) and three different diacids: 1,3-cyclohexanedicarboxylic acid (1,3-CHDA), isophthalic acid (IPA) and adipic acid (AA). The solubility and viscosity of the polyester polyols were determined by using methyl ethyl ketone (MEK). All the polyester polyols were crosslinked with hexamethylene diisocyanate (HDI) isocyanurate to form polyurethane coating films. These films were evaluated for their mechanical and chemical resistance properties. Studies on the film characteristics revealed that the polyurethane films based on cycloaliphatic diacid generally showed comparatively better performance properties than the polyurethane film based on aromatic and linear aliphatic diacids in general.     

The effect of difunctional acids on the performance properties of polyurethane coatings

Hydroxyl-terminated polyesters are the most common polyols that are crosslinked through an isocyanate group. In this study, the polyester polyol resins were synthesized by using 1,4-cyclohexanedimethanol (1,4-CHDM) with the mixture of different diacids as 1,3-cyclohexanedicarboxylicacid (1,3-CHDA), 1,4-cyclohexanedicarboxylicacid (1,4-CHDA), isophthalic acid (IPA), adipic acid (AA), and azelaic acid (AZA). The solubility and viscosity of these polyester polyol resins were determined by using suitable solvent. All the polyester polyols were crosslinked with HDI isocyanurate and IPDI trimer to form polyurethane coating films. These films were evaluated for their mechanical, thermal, and chemical resistance properties. The studies on film characteristics reveal that the cycloaliphatic diacids afforded polyurethane with greater performance properties than that of aromatic and linear aliphatic diacids.     

Synthesis and characterization of transparent and high impact resistance polyurethane coatings based on polyester polyols and isocyanate trimers

A series of polyester polyols were synthesized by polycondensation reaction using adipic acid (AA), 1,4-cyclohexanedicarboxylic acid (1,4-CHDA), and 1,6-hexanediol (HDO), 1,4-cyclohexanedimethanol (1,4-CHDM) and trimethylol propane (TMP), in which the molar ratio of the reactants AA/1,4-CHDA was varied. These series of polyols were reacted with isophorone diisocyanate (IPDI) and hexamethylene diisocyanate (HDI), alone or in combination, to form polyurethane (PU) coatings.     

聚醚-酯嵌段共聚物提高聚氨酯弹性体水解稳定性的研究

采用双金属络合催化剂(DMC),以脂肪族己二酸系聚酯多元醇为起始剂,与环氧丙烷、环氧乙烷进行烷氧基化反应,制得聚醚酯多元醇用于聚氨酯弹性体(PUE)的合成,可得到综合性能优良的PUE材料.在相同硬段含量下,聚醚酯型PUE的力学性能接近纯聚酯型PUE,优于纯聚醚型PUE,并且其耐水解性能得到较大的提高,接近纯聚醚型PUE...