聚酯多元醇合成试验研究

研究了投料比，升温方法，反应温度，真空度，催化剂对聚酯多元醇合成的影响。     

芳烃聚酯多元醇的合成及应用研究

介绍了以聚对苯对二甲酸乙二醇酯残渣和二乙二醇为主要原料制备低成本芳烃聚酯多元醇的工艺路线，讨论了温度，ＤＥＧ和ＰＥＴ残渣的摩尔比对芳烃聚酯多元醇性能的性能。试验表明，最佳反应温度为１９０℃－２２０℃，最佳摩尔比为１．２２－１．３４。研究了稳定剂对聚酯多元醇组合料贮存稳定性的影响，组合料贮存期在半年以上。聚酯型聚所酯硬泡的氧指数达２７．５％。     

用于可焊性漆包线漆的聚酯多元醇的合成及性能测定

发展了一种聚酯多元醇,可望应用于制备新型的直焊性耐热漆包线漆。采用间苯二甲酸、己二酸、乙醇胺或乙二醇、三乙醇胺或甘油,通过熔融共缩聚合成一系列聚酯多元醇,然后用甲醚化氨基树脂及溶剂混合、配制成溶液,再涂制成漆包线。研究结果表明系列聚酯多元醇的分子量、酸值均符合漆包线漆制备的技术要求;采用乙醇胺代替乙二醇、三乙醇胺代替甘油在聚酯多元醇的合成反应中具有较高的缩聚反应活性,由此制备的聚酯多元醇具有在350℃至400℃的范围内更快速分解和分解残渣较少的特点,采用此聚酯多元醇作为主要成分、涂制的漆包线在400℃至460℃范围内下可直焊,介质损耗曲线的拐点温度可达到162℃、意味着耐热等级较高。     

醇胺聚酯多元醇的合成及应用研究

以Ｎ－甲基二乙醇胺和癸二酸为原料，在催化剂作用下合成了醇胺聚酯多元醇。探讨了反应时间、反应温度、与比等参数对反应及产品性能的影响。找出了最佳合成条件。将该产品用于聚氨酯弹性体配方中，与一般的聚酯多元醇制得的弹性体相比，礤耐温性、耐焰性及制品尺寸稳定性均得到提高。     

阻燃聚酯多元醇的合成及应用

研究了以四溴苯酐、聚乙二醇400和1.2-丙二醇为原料,以二正丁胺为催化剂,合成的含溴聚酯多元醇的方法,探讨了反应温度、反应时间、催化剂用量等对合成反应的影响。结果表明,当反应温度控制在110~200℃,升温速度以15℃/h,反应时间15 h左右,催化剂质量分数在0.05%~0.1%时,阻燃聚酯多元醇酸值小于2.0 mmKOH/g,粘度在3.0 Pa.s左右时,用该产品制备硬度阻燃聚氨酯泡沫具有优良的阻燃性能。     

聚酯多元醇合成中催化剂的应用研究

以苯酐、己二酸和甲基丙二醇为原料合成了聚酯多元醇,在基本相同的反应条件下,分别采用乙二醇锑Sb2(EG)3、三氧化二锑(Sb2O3)、醋酸锌Zn(Ac)2、钛酸四丁酯(TBT)和钛酸四异丙酯(TPT)等催化剂进行聚酯多元醇的合成反应。研究结果表明,在本反应体系中TPT是最佳催化剂;随着聚酯多元醇理论相对分子质量的增大,反应越难以进行,因此催化剂用量应相应增加,但其质量分数以不超过0.04%为宜。     

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。     

癸二酸系聚酯多元醇的合成

采用癸二酸,对苯二甲酸与乙二醇,丁二醇,己二醇,新戊二醇进行缩聚反应,以二氯内化剂,在１４０－２００℃下反应５－７ｈ,合成了癸二酸系聚酯多元醇。实验结果表明,当醇酸摩尔比大于１．２０：１,催化剂用量为５＊１０＾－３ｍｏｌ／ｍｏｌ时,可得到酸值小于２．０ｍｇ／ｇ,羟值（ＫＯＨ）大于５０ｍｇ／ｇ,相对分子质量为１５００－２０００的聚酯多元醇。讨论了聚酯的化学组成对聚醌多元醇结构的影响,考察了催化剂的种     

聚酯多元醇（PEPA）合成的研究

聚酯多元醇（ＰＥＰＡ）合成的研究钟东红罗平水周作良陶建华（江西省轻工业研究所３３００２９）一、前言聚乙二酸乙二醇酯系聚氨酯合成材料的基本原料，也是我国有机化工的重要原料。利用它可以合成聚氨酯特种橡胶弹性体、高档涂料、聚氨酯漆、粘合剂、纤维等。进一步开...     

己二酸系聚酯多元醇的合成

以己二酸和不同多元醇为原料,经酯化、缩聚合成已二酸系聚酯多元醇。考察了醇酸摩尔比、催化剂种类和用量等因素对酯化反应的影响。研究表明,当采用四异丙基钛酸酯为催化剂,质量分数为总投料量的0．03％,醇酸摩尔比为1．2～1．3,反应温度为220℃,真空度为85～90kPa时,合成的己二酸系多元醇酯化率可达99％。     

马来酸酐改性油酸基聚酯多元醇的合成

以油酸为原料,经羟基化、酸酐改性、酯化合成油酸基聚酯多元醇,考察了摩尔比、常压反应温度时间、减压反应温度时间、催化剂用量等因素对酯化反应的影响,研究了不同组合酯化试剂对多元醇性能的影响。采用红外光谱(FT-IR)、高效凝胶色谱(GPC)、热重(TGA)对多元醇的结构、相对分子质量、热稳定性进行了表征。结果表明,最佳酯化条件为醇酸比n(二甘醇)∶n(羟基油酸)=1.1∶1,催化剂Zn O量为0.8%,常压、210℃下反应90min,再在180℃下减压反应120min。     

Preparation of polyester polyols from unsaturated fatty acid

Oleic acid is a typical unsaturated fatty acid that is found widely in vegetable oils. The objective of this investigation was to produce a new type of oleic‐based polyol from oleic acid. Possible advantages of this approach include the production of high‐performance polyurethane materials from renewable resources and value‐added research for oleic acid. Oleic‐based polyols were synthesized by a three‐step process consisting of epoxidation and ring‐opening reaction, followed by esterification. The synthesized polyols appeared as a viscous liquid at room temperature with hydroxyl numbers from 307 to 425 mg KOH/g. Preparation of polyurethane foams using oleic‐based polyols and isocyanate was studied. An environmentally friendly blowing agent, HCFC‐141b, together with a small amount of water, was used. The synthesized foams were characterized by FTIR, SEM, and TG/DSC. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012     

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.     

硅醇改性聚酯树脂的制备

利用饱和羟基硅烷为改性剂、钛酸丁酯为催化剂,以1,2-丙二醇与己二酸进行缩聚反应,制备了改性醇酸型聚酯树脂.研究了反应条件对反应转化率的影响,确定了适宜的合成工艺条件.当n(1,2-丙二醇):n(己二酸)=1.3:1,硅醇、三(2-羟乙基)异氰尿酸酯(THEIC)和钛酸丁酯的用量分别为3%、5.6%和0.2%时,在20...     

Moisture-cured polyurethane based on polyester and polycarbonate polyols

Moisture-cured polyurethanes were prepared by reacting toluene diisocyanate and sebacic acid-based hydroxy esters such as ethylene glycol sebacate, propylene glycol sebacate, diethylene glycol sebacate, and polyester polyols such as poly(ethylene glycol sebacate), poly(propylene glycol sebacate), poly(diethylene glycol sebacate), and poly(butane diol sebacate). The effect of molecular weight of the esters on film properties and the catalytic effect of 3–5% triethylamine, triethanolamine, and 2-diethylaminoethanol on curing of such films were investigated. Polyurethanes were also prepared using a blend of poly(butane diol carbonate) polyol with polyester polyols. Best polyurethane compositions were obtained when sebacic acid-based polyester polyols were blended with poly(butane diol carbonate) polyol in the ratio of 3:2. These polyurethanes show good tensile strength (120–215 kg/cm²) and elongation (340–460%) properties, having high melting points (247–268°C) and good resistance to solvents and chemicals. Moreover, they are colorless and transparent.     

Seed oil based polyester polyols for coatings

The hydroformylation of seed oil based fatty acid methyl esters leads to aldehyde intermediates that can be hydrogenated to give novel seed oil based monomers. In this study, the seed oil based monomers were polymerized with low molecular weight diols to produce novel aliphatic polyester polyols with very low viscosities. The seed oil polyester polyols provide environmentally friendly (green) coating formulations with low volatile organic compound emissions which lead to coatings with superior physical properties, such as exceptional hydrolytic resistance and flexibility. From these polyester polyols, waterborne polyurethane dispersions were also developed with excellent stability resulting in coatings with superior physical properties (i.e., good toughness and abrasion resistance), and exceptional hydrolytic and acid resistance.     

水性有机硅改性聚酯树脂的合成与应用

本文以Sb2O3为催化剂,采用熔融法合成端羟基聚酯树脂,分别以10%、30%、50%的有机硅中间体进行化学改性,以偏苯三甲酸酐对有机硅改性后的聚酯进行了水性化封端,并采用二甲基乙醇胺成盐,制备的水性有机硅改性聚酯树脂配以氨基树脂固化成膜后,表现出具有优良耐高温性、高硬度、良好柔韧性等性能,实验表明,当有机硅含量为30%时,改性聚酯树脂树脂的综合性能和性价比最好。     

石墨烯柔性导电改性涤纶织物的制备与性能

采用乙二胺（EDA）和氢氧化钠对涤纶织物进行改性，获得氨基化改性涤纶，再将改性涤纶浸渍氧化石墨烯（GO）溶液，涤纶表面的GO还原成还原氧化石墨烯（RGO）后得到具有导电性能的涤纶织物。采用扫描电镜（SEM）对导电涤纶进行表征，并进行耐洗和耐摩擦性能测试。研究结果表明，涤纶织物经EDA改性后对GO的吸附能力增强，织物导电性增加；改性涤纶的最佳导电整理工艺为GO溶液pH值6，5 g/L保险粉在95℃还原60min可使织物上GO较充分还原，改性涤纶织物的导电性随GO浓度的增大、还原温度的增加和还原时间的延长而增强，当GO为2g/L时，改性涤纶的表面电阻值降低至14.575 KΩ/cm。由SEM结果可知未经改性的涤纶织物表面光滑，经导电整理后织物表面覆盖一层石墨烯薄膜。     

超支化聚酯改性无溶剂环氧涂料的研制与应用

以超支化聚酯CYH-277制备了一种改性无溶剂环氧涂料.经检测,其黏度低,涂层性能良好.用它及现有的环氧清漆、水性环氧地坪底漆、硅烷分别对混凝土试块进行维修涂饰,对比了渗透深度、吸水量比、抗Cl?渗透、抗压强度等性能.结果表明,超支化聚酯改性环氧涂层渗透性好,抗吸水、抗Cl?渗透的能力突出,对混凝土基体有良好的保护作用.由于该双组分涂料活性高,适用期只有8～10 min,因此必须快混快用,优先采用枪外混合喷涂作业模式.     

硅溶胶–有机硅改性聚酯复合涂料的合成及应用

以碱性硅溶胶和有机硅单体合成了硅树脂,然后用其改性聚酯,得到硅溶胶–有机硅改性聚酯复合树脂。以此复合树脂配制成涂料,喷涂在铝合金底材上,并与纯聚酯所制涂膜进行比较。考察了反应温度对硅树脂稳定性的影响,得到最佳反应温度为35~40°C。通过热重分析和测试涂膜机械性能,探讨了硅树脂含量对复合树脂的热稳定性以及涂膜光泽、铅笔硬度、附着力和柔韧性的影响。结果表明,硅树脂的加入使聚酯的热稳定性显著提高,并且硅树脂含量越高,热稳定性越好。然而,加入硅树脂虽然显著提高了涂膜铅笔硬度,且在高温下也能保持较高硬度,但其用量并不是越多越好,因为它会造成涂膜的光泽度和附着力下降。综合考虑,选择硅树脂含量为30%,此时所得涂膜表现出良好的附着力、耐高温性、耐盐水性和耐酸碱性,满足QB/T 2421–1998《铝及铝合金不粘锅》标准的要求。