环氧改性有机硅树脂的应用研究

以不同环氧改性有机硅树脂作为基料树脂,研究了不同树脂对漆膜性能的影响;通过选用不同固化体系对漆膜机械性能和耐热性做了比较;同时研究了环氧改性有机硅树脂与有机硅树脂的混溶性及影响;分别研究了该树脂配制的底、中、面涂层的常规性能及复合涂层的机械性能。同时对不同固化剂的影响和不同树脂的影响做了TG和DSC分析,结果表明,环氧改性有机硅树脂耐温性能较环氧树脂有较明显的提高,基本可用于高温涂料;环氧改性有机硅树脂可与纯有机硅树脂复配,有望形成具有更高耐温性能的涂膜。并且可通过复合固化剂的选用达到更佳的耐温性能和较好的物理机械性能。     

高耐性抗静电涂料的研究

以酚醛环氧为树脂体系,添加一定量的导电云母粉,脂环胺作为环氧固化剂制备了高耐性抗静电涂料,探讨了导电云母粉的用量对导静电性能的影响;不同类型的环氧树脂和不同固化剂对涂层耐溶剂后导静电性能的影响;不同涂层耐盐雾性能以及中性盐雾对涂层导静电性能的影响。其中脂环胺固化酚醛环氧体系的导静电性能最稳定。     

高固体分酚醛环氧涂料的研究和设计

以液体酚醛环氧树脂为主基料树脂,脂肪酸改性环氧树脂为辅助基料树脂;以改性芳香胺、改性脂环胺、腰果壳油改性酚醛胺为固化剂制备了高固体分酚醛环氧涂料,该产品能够适用于更苛刻的腐蚀环境。还研究了不同固化剂及当量比对涂层物理化学性能的影响,并展望了该产品的应用前景。     

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。     

柔性环氧防腐涂料的制备

以聚醚聚氨酯改性环氧树脂和自制的固化剂为基料,添加适当的防锈颜填料及助剂,制备了一种柔性环氧防腐涂料,该涂料具有良好的机械性能、耐介质性能及防腐性能,而且涂层浸水后以及低温下的柔韧性保持率高,湿态附着力好。     

导读

正张剑飞等通过选用不同相对分子质量环氧树脂、不同类型固化剂、颜填料用量等,探讨了基料树脂类型、硅烷偶联剂用量、增韧剂用量、颜基比等对环氧涂层附着力的影响。丁超等以F51环氧酚醛树脂为成膜树脂,以改性酚醛胺为固化剂,通过对颜填料及颜基比的研究,研制了环氧酚醛耐高温涂料。通过对该涂料耐温性能测试,研制的环氧酚醛耐     

有机耐高温涂层的制备及影响因素

以黏度为2400、3900和5300的树脂和改性环氧有机硅树脂为基料,添加钛白粉、氢氧化铝等不同的无机填料和其他添加剂,制备耐高温涂料。测试其性能,考察不同种类填料和助剂的添加量对耐高温涂料性能的影响。结果表明,改性环氧有机硅树脂+8%的氢氧化铝+10%钛白粉配方,涂层具有更好的耐冲击性、表面硬度、附着力及耐热性能。     

酚醛环氧乙烯基树脂复合涂料的制备及性能研究

采用有机硅树脂改性酚醛环氧乙烯基树脂为基体,以改性SiC纤维、促进剂等为原料,与固化剂组成双组份常温固化防腐蚀耐磨耐高温涂料。有机硅树脂TSR144添加可以改善涂层的耐热性,但涂层粘结性下降。当有机硅树脂TSR144用量为6%时,涂层的综合效果最佳;改性的SiC纤维能够增强增韧涂料。当改性的SiC纤维的含量为4%时,涂层的损失率最低。制备的涂料具有耐腐蚀性能好,稳定性高,耐高温等优点。     

环氧改性有机硅耐热涂料的配方研究

以HG-43环氧改性有机硅树脂为基料,配以金属氧化物和硅酸盐类填料,制备了环氧改性有机硅耐热涂料。讨论了树脂含量以及空心玻璃微珠和阻燃剂的用量对涂料性能的影响,采用热失重分析、隔热性能和氧–乙炔烧蚀试验等方法对涂料的耐热性能进行了表征。结果表明,当HG-43环氧改性有机硅树脂用量为30%、空心玻璃微珠的用量为18%、复合阻燃剂用量为9%时,所制备的环氧改性有机硅耐热涂料的附着力2级,硬度4H,氧–乙炔线烧蚀率为0.278 mm/s,质量烧蚀率为0.075 8 g/s,具有良好的隔热性能。     

环氧改性有机硅树脂基热防护涂层的制备及抗烧蚀性能研究

以环氧改性有机硅树脂作为基体,添加二氧化硅、玻璃纤维粉、钛白粉、硅酸盐类填料和复合阻燃剂等无机填料,以低分子聚酰胺作为固化剂,设计制备了环氧改性有机硅热防护涂层,并且分析了填料种类以及添加量对涂层力学性能和抗烧蚀性能的影响。结果表明：添加无机填料能大幅提高涂层的强度和热解保留质量,有效提升涂层抗烧蚀性能;在改善涂层的抗烧蚀性能方面,玻璃纤维粉优于二氧化硅粉,钛白粉显著优于硅酸盐类填料。     

柔性陶瓷重防腐涂料的研制及性能研究

探讨了树脂和固化剂类型、颜基比以及陶瓷粉类型对柔性陶瓷涂料性能的影响。结果表明:选择酚醛环氧树脂与双酚F树脂混合使用,以异佛尔酮二胺为固化剂,颜基比选择3.5:1,以不同细度的碳化硅粉搭配氧化铝粉和云母粉作为陶瓷粉所制备的柔性陶瓷涂料的性能最佳。对该涂料各种性能进行测试并与进口陶瓷涂料进行性能对比,发现该涂料的性能与进口陶瓷涂料性能相当,具备良好的耐磨性能、耐温性能、耐化学品性能及其他物理机械性能。     

新型含萘环/环戊二烯环结构固化剂的合成及性能

A novel novolac curing agent containing both naphthalene and dicyclopentadiene （DCPD） moieties was prepared to produce a highly heat-resistant cured polymer network. The chemical structure was characterized using Fourier transform infrared spectroscopy, nuclear magnetic resonance, mass spectrometry, and gel permeation chromatography analyses. The thermal properties of the resulting polymer from diglycidyl ether of bisphenol A epoxy resin cured with the novel curing agent were evaluated using dynamic mechanical thermal analysis and thermogravimetric analysis. Compared with the conventional curing agent, the resulting polymer cured with naphthalene/DCPD navolac shows considerable improvement in heat resistant properties such as higher glass transition temperature （Tg） and thermal stability. The result also shows better moisture resistance because of the hydrophobic nature of naphthalene/DCPD structure.     

New type of phenolic resin: Curing reaction of phenol‐novolac based benzoxazine with bisoxazoline or epoxy resin using latent curing agent and the properties of the cured resin

In this study, we aimed to reduce the cure time, and to lower the cure temperature of the benzoxazine compound. Therefore, curing reaction of benzoxazine with bisoxazoline or epoxy resin using the latent curing agent and the properties of the cured resins were investigated. The cure behavior of benzoxazine with bisoxazoline or epoxy resin using the latent curing agent was monitored by differential scanning calorimetry and measurements for storage modulus (G′). The properties of the cured resin were estimated by mechanical properties, electrical insulation, water resistance, heat resistance, and flame resistance. As a result, it was confirmed that by using the latent curing agent, cure time of benzoxazine and bisoxazoline or epoxy resin was reduced, and cure temperature was lowered. And it was found that the curing reaction using phenol‐novolac based benzoxazine (Na) as the benzoxazine compound could proceed more rapidly than that using bisphenol‐A based benzoxazine (Ba) as the benzoxazine compound. However, the cured resins from Ba and bisoxazoline or epoxy resin using the latent curing agent showed good heat resistance, flame resistance, and mechanical properties compared with those from Na and bisoxazoline or epoxy resin using the latent curing agent. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2009     

输油管线用熔结环氧粉末涂料的制备

采用线型酚醛环氧树脂(ENR)、环氧树脂E-12、固化剂JECP-02B制备了输油管线用熔结环氧粉末涂料。考察了线型酚醛环氧树脂与环氧树脂E-12质量比对涂料性能的影响,以及固化剂JECP-02B、流平剂GLP588和固化促进剂2-甲基咪唑对固化行为的影响,用红外光谱分析了固化前后树脂的变化,m(ENR)/m(E-12)=(75/25)~(25/75)、m(固化剂)/m(环氧树脂)=1/4、m(流平剂)/m(环氧树脂)=2/100、m(2-甲基咪唑)/m(环氧树脂)=(0.1~0.15)/100时,涂层性能达到输油管线防腐指标(SY/T 0315-97)。长庆化工有限责任公司用该技术扩大生产约10 t环氧粉末涂料,用于长庆油田输油管线的防腐,产品满足了1.5 m in/230℃快速固化的施工要求。     

气干性酚醛环氧乙烯基树脂的研制

采用交联共聚法合成了气干性酚醛环氧乙烯基树脂。研究了物料配比、阻聚剂用量、反应温度对反应的影响,测试了树脂的耐腐蚀性、气干性和力学性能。结果表明,酯化过程最佳工艺条件为:反应温度110～115℃,反应时间2.5 h,醇、酸物质的量比1.1∶2,阻聚剂质量分数0.05%,催化剂质量分数0.3%。交联聚合过程最佳工艺条件为:反应温度75～85℃反应时间2.0 h,改性剂(甲苯二异氰酸酯)加入质量5%。合成的树脂的弯曲强度为101 MPa,弯曲模量3.66 GPa,冲击强度11.4 kJ/m2,气干性、韧性、固化性能均超过同类树脂,可用于耐温强腐蚀场合以及用作表面涂层、耐温腻子基体树脂、自流平树脂等。     

油酸对环氧树脂的改性研究

研究了油酸对环氧树脂酸酐固化物性能的影响。用简支梁冲击试验机研究了油酸对固化物耐冲击性的影响,并用热变形仪和热重分析仪研究了固化物热稳定性的变化。结果表明,适量的油酸可以提高环氧树脂固化物的韧性,对其硬度影响不大,而且当固化剂适量时则对固化物的耐热性影响很小。     

无溶剂环氧防腐涂料的制备和性能研究

开发了一种以腰果酚改性胺为固化剂的无溶剂环氧防腐涂料,介绍了环氧树脂、固化剂、稀释剂以及填料等原料的选择,探讨了环氧树脂与腰果酚改性胺的固化机理,并考察了硅烷偶联剂对涂层防腐性能的影响。检测结果表明,环氧树脂与腰果酚改性胺的固化主要以环氧基与胺基之间的反应为主;硅烷偶联剂可以提高涂层的附着力,有效地增强涂膜的耐水性。     

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.     

一种含磷酚醛/环氧树脂阻燃性的研究

以双酚S、甲醛和三聚氰胺为原料合成含氮线性酚醛树脂,并用其作为固化剂,结合阻燃剂甲基膦酸酐对环氧树脂进行阻燃改性。利用TGA对环氧/酚醛树脂与环氧/酚醛树脂/膦酸酐两种浇铸体系的热稳定性能进行了比较研究。结果表明甲基膦酸酐为阻燃剂,酚醛树脂固化环氧树脂能得到效果较好的阻燃材料,垂直燃烧试验结果为UL-94V-0级。