应用苯酐酰化、电位滴定法测定漆酚缩甲醛中末端醇羟基含量

<正> 生漆在氨水存在条件下,经与甲醛发生缩合反应,制成漆酚缩甲醛,是对生漆进行改性制备具有特殊性能涂料的常用技术途径之一。漆酚缩甲醛既可直接做为一种无毒、自干的涂料使用,又可以做为原料或组份进一步制备其它涂料。无论是在那一种情况下,较准确地测定漆酚缩甲醛中末端醇羟基的含量,对于判定涂料干燥性能以及能动地     

两种联苯二酚化合物的制备及其在天然橡胶中的应用

制备3,3′,5,5′-四叔丁基-2,2′-联苯二酚和5,5′-二叔丁基-2,2′-联苯二酚,并研究其在天然橡胶(NR)中的应用。结果表明,以2,4-二叔丁基苯酚为单体、氯化铜和四甲基乙二胺为催化剂、甲醇为溶剂合成3,3′,5,5′-四叔丁基-2,2′-联苯二酚,再以3,3′,5,5′-四叔丁基-2,2′-联苯二酚为原料、氯化铝和硝基甲烷为催化剂、苯为溶剂制备5,5′-二叔丁基-2,2′-联苯二酚(为易于溶剂回收,后处理的重结晶采用四氯化碳单组分溶剂)是可行的;将3,3′,5,5′-四叔丁基-2,2′-联苯二酚和5,5′-二叔丁基-2,2′-联苯二酚作为防老剂用于NR中,胶料的抗硫化返原性能、耐热老化性能和热稳定性优于防老剂BHT胶料。     

叔丁酚类的性质,用途及合成

本文综述了由酚类进行叔丁基化后得到的一系列叔丁酚的性质和用途，包括对叔丁基苯酚、２，６－二叔丁基对甲苯酚、对叔丁基邻苯二酚、２，４－二叔丁基苯酚、２，６－二叔丁基苯酚及３－甲基－６－叔丁基苯酚等６种化合物。对了解它们在化学过程中的重要性具有一定的参考意义。     

腰果酚基改性树脂在涂料领域的应用研究进展

腰果酚作为一种绿色可再生资源,来源丰富,价格低廉,且具有较高的反应活性,可替代石油酚,广泛应用于表面活性剂、涂料等领域。本文根据改性生物质腰果酚的结构特点,系统总结了国内外腰果酚改性树脂性能及在涂料领域的应用,并对腰果酚改性树脂在涂料中的应用前景进行了展望,为这类来源广泛的生物质进一步在涂料中的应用提供理论支持。     

邻氨基对叔丁基酚合成研究

对合成邻氨基对叔丁基酚的工艺路线进行研究后，确定用苯胺作原料经重氮化后与对叔丁基酚偶合，再用水合肼还原合成邻氨基对叔丁基酚。并对影响反应收率的诸因素进行了探讨。     

高效液相色谱法同时测定工业废水中的2,4-二叔丁基酚和2,6-二叔丁基酚

采用高效液相色谱法同时测定工业废水中的2,4-二叔丁基酚和2,6-二叔丁基酚的含量。色谱条件为ZORBAX -XDB-C8色谱柱（4.6 mm×150 mm,5μm）,流动相为水：甲醇：异丙醇（25＋60＋15）混合液,流量为1.0 mL·min-1,进样量20μL,调节检测波长为270 nm。在该方法下2,4-二叔丁基酚和2,6-二叔丁基酚的线性范围为0.005~0.5 mg·mL-1（相关系数分别为0.9999, n=5;0.9999, n=5）。加标回收率分别在98.3%~101.8%和98.5%~101.0%之间,相对标准偏差（n=8）分别为1.35%和1.07%。所用的方法准确简便、重复性好,可作为2,4-二叔丁基酚和2,6-二叔丁基酚含量测定的有效方法。     

合成对叔丁基邻苯二酚新工艺的研究

介绍了合成对叔丁基邻笨二酚的各种工艺，并着重介绍了用对甲苯磺酸作催化剂，邻苯二酚和异丁烯为原料合成对叔丁基邻笨二酚的新工艺。     

漆酚环氧改性涂料的工业化研制及性能研究

环氧改性漆酚的涂料因具备成膜快、耐酸碱腐蚀良好、耐磨性高等特点,而被广泛应用于工业防腐、仿古建筑、家具涂装等领域。本文以生漆中的漆酚为基料,经环氧改性处理后,进一步研制出4种改性涂料：清漆I、防腐涂料I、底漆I、红色涂料I,并进行性能测试。结果表明：漆酚与环氧树脂E44投料比为1∶1,溶剂HB用量为40%-45%,反应温度在127℃～130℃反应6h制备的环氧漆酚性能最优;当环氧改性漆酚的粘度控制在60pa·s,固含量在36%～45%,增加2%湿润剂及1.8%增稠剂后制调制出的4种涂料稳定性好,性能指标优于国家标准。     

叔丁基酚的合成

本文介绍了合成叔丁基酚常用的一些催化剂及几种重要叔丁基酚的合成方法和应用。     

含受阻酚侧链的聚氨酯阻尼性能研究

将二缩三乙二醇双〔β-(3-叔丁基-4-羟基-5-甲基苯基)丙酸酯〕(抗氧剂245)羧基化,得到具有一定反应活性的受阻酚基团,通过与多苯基多甲基多异氰酸酯(20S)的反应,合成带受阻酚侧链的多异氰酸酯,制备受阻酚型聚氨酯阻尼材料;讨论了羧基受阻酚及其含量、作为阻尼填料的抗氧剂245以及nNCO/nOH对聚氨酯材料阻尼性能的影响。结果表明,引入羧基受阻酚基团,聚氨酯材料的阻尼性能有很大的提高,并随引入的羧基受阻酚含量的增加而提高;当羧基受阻酚占20S质量分数为21.9%时,提高阻尼填料抗氧剂245的含量、减小nNCO/nOH,聚氨酯材料的阻尼性能增加。     

Effects of nanoclay on the properties of cardanol‐modified‐resol‐epoxy‐novolac composite material

A nanocomposite based on nanoclay and resol that was modified with cardanol, a natural alkyl phenol, shows improvement for the glass‐fiber‐reinforced epoxy‐composite system. Dispersion of the nanocomposite was investigated by X‐ray, showing good results obtained by the in situ polymerization method. The mechanical properties of the final composites were improved by doping a 6 wt% of nanoclay in cardanol‐modified‐resol (CMR) into the epoxy matrix. The results show that a 15 wt% of CMR in epoxy is a most suitable ratio. Using polyamide as a curing agent instead of other traditional systems, such as anhydrides or amines for epoxy resin, overcame important limitations, further allowing for improved processability. The overall composite performance was enhanced. Additionally, the thermal stability of the system was investigated by thermal gravimetric analysis. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 103: 3238–3242, 2007     

一种高固体分环氧防腐涂料的研制

采用小分子量环氧树脂和大分子量环氧树脂复配作为基料,以腰果壳油改性酚醛胺为固化剂,研制了一种高固体分环氧防腐涂料,并进行了性能检测。讨论了环氧树脂、环氧稀释剂、颜填料、流变助剂和固化剂对涂料性能的影响。     

UV光固化环氧丙烯酸酯耐磨涂料的研究

以E51和E44环氧树脂和丙烯酸为原料,制备了UV固化环氧丙烯酸酯耐磨涂料。不同光引发剂、稀释剂和助剂等对UV固化环氧丙烯酸酯涂料固化性能均有影响。研究结果表明,用安息香乙醚与二苯甲酮(质量比为2∶1)的混合体系作为光引发剂的引发效率最高,最佳涂料配方:环氧丙烯酸酯∶丙烯酸丁酯∶安息香乙醚∶二苯甲酮∶滑石粉为70∶20∶4∶2∶4(质量比)。     

Study of heat of reaction between plasma-polymer-coated silica fillers and biphenyl epoxy resin

Silica fillers were coated by plasma polymer coatings of 1,3-diaminopropane, allylamine, pyrrole, 1,2-epoxy-5-hexene, allyl mercaptan and allyl alcohol using RF plasma (13.56 MHz). The coated fillers were then mixed with biphenyl epoxy, phenol novolac (curing agent) and/or triphenylphosphine (catalyst), and subjected to DSC analyses in order to elucidate the chemical reaction between functional moieties in the plasma polymer coatings and the epoxy resin. For comparison, samples were also prepared with liquid monomers, biphenyl epoxy, phenol novolac and/or triphenylphosphine. In addition, silicon wafers were coated by plasma polymerization and analyzed by FT-IR. Only the samples with 1,3-diaminopropane and allylamine plasma-polymer-coated silica fillers showed heat of reaction peaks when they were mixed with biphenyl epoxy resin, while these samples as well as the sample with pyrrole plasma-polymer-coated silica fillers exhibited heat of reaction peaks when mixed with both biphenyl epoxy and phenol novolac (curing agent). However, all plasma polymer samples exhibited heat of reaction peaks when they were mixed with biphenyl epoxy, phenol novolac and triphenylphosphine. The samples with liquid monomers showed a similar behavior, but the peaks appeared in the lower temperature range.     

双组分喷涂型无溶剂超厚膜环氧重防腐涂料的研制

选用高环氧值、低黏度改性环氧树脂作为基料树脂,按一定比例复配曼尼斯碱和腰果酚酚醛胺为固化剂,搭配自制触变性浆体、多活性端基低黏度聚合物活性稀释剂、缓蚀型颜填料及助剂,制备了一种双组分喷涂型无溶剂超厚膜环氧重防腐涂料,并对涂料性能影响因素进行了分析,对涂层性能进行了测试,结果显示该涂料机械性能和防腐性能优异。     

Effect of structure on coating performance properties of novel alkylenedioxydiphenol based epoxy resins

Although epoxy resins exhibit a wide range of useful properties for protective coatings on metal substrates, an increasing trend in the coatings industry toward more formable coatings places a severe burden on the traditional bisphenol. A based epoxy resins. Presented in this work are the results of experiments with a new series of epoxy resins based on alkylenedioxy diphenols demonstrating the relationship between coating performance properties (formability, chemical resistance, and adhesion) and structural parameters such as resin backbone flexibility, degree of phenol/formaldehyde crosslinkmg, and concentration of OH groups in the backbone of epoxy resins. Optimizing the three structural parameters for the new resins results in substantial improvements in coating performance properties over the traditional bisphenol A based resins.     

改性咪唑类潜伏性环氧树脂固化剂的制备

由丙烯酸、甲基丙烯酸甲酯、丙烯酸丁酯等的共聚反应制备了有一定亲水性的丙烯酸树脂，然后利用制备的丙烯酸树脂对咪唑和2-乙基-4-甲基咪唑进行改性制备具有一定潜伏性的环氧树脂固化剂，该固化剂可以和环氧乳液进行复配，具有较好的相容性，可制备出单组分丙烯酸树脂环氧树脂铝箔涂覆材料，该材料涂覆于铝箔表面，可获得光滑致密耐腐蚀的涂膜。     

自凝性松香改性酚醛树脂的合成研究

以两步法合成自凝性松香改性酚醛树脂,重点研究了酚醛浆的合成,通过考察酚醛摩尔比、催化剂用量、反应温度和反应时间对酚醛浆缩合反应的影响,得到适宜的酚醛浆合成条件:酚醛摩尔比1:1:5,催化剂用量为对叔丁基苯酚质量的3％,反应温度60℃,反应时间2．5-3 h。并对酚醛浆进行了GPC、VPO及红外光谱分析。利用该酚醛浆合成了具有良好自凝性的松香改性酚醛树脂。     

Vapour phase tertiary butylation of phenol over sulfated zirconia catalyst

Vapour phase butylation of phenol was carried out over a sulfated zirconia solid superacid catalyst in the temperature range 448–473 K using t-butyl alcohol as the alkylating agent. A good substrate (phenol) conversion and excellent product (para-tertiary BP) selectivity was obtained. The catalytic activity remains nearly the same on repeated use of the catalyst. Further, the catalyst was not deactivated when the reaction was carried out for a longer duration, i.e., even after several hours of reaction.     

Aging and Thermal Studies on Epoxy Resin Modified by Epoxidized Novolacs

Epoxy resins are thermosetting polymers widely used for polymer composites, adhesives, high performance coatings, potting and encapsulation, and numerous other applications. These resins have excellent mechanical and electrical properties, low cure shrinkage, and good adhesion to most substrates. This study is an attempt to improve the thermal and aging characteristics of epoxy resin by blending with other multifunctional epoxies such as EPN and ECN. Bis-phenol A epoxy resins containing 2.5 to 20 wt% of epoxy novolac were cured in the presence of a polyamide hardener and tested for thermal and mechanical properties, hardness, water absorption, etc. Blends containing 10 to 15 wt% of epoxy novolac show substantial improvement in properties such as tensile strength, elongation, and energy absorbed to break. The novolac derived from p-cresol was better than that based on phenol in enhancing the properties. TGA, DSC, and DMA were employed for studying the thermal properties of the modified resin. The study reveals that modification using epoxy phenol and p-cresol novolac resins (EPN and ECN, respectively) improves the aging characteristics of the epoxy resin in addition to overall improvement of the mechanical properties.