水性防腐涂料湿附着力及其性能的研究

水性涂料是绿色环保涂装的主要方向,涂层湿附着力测试是决定涂层防腐蚀性能最有效率的指标。本文概述了湿附着力作用机制,试验了不同成膜水性树脂种类、不同水性环氧、颜基比以及微纳米水滑石改性对涂层湿附着力、吸水率以及耐盐雾性能的影响。     

无溶剂重防腐环氧涂料的制备与研究

采用中低相对分子质量树脂体系以及改性脂环胺固化剂,以化学、物理防锈颜料,体质填料为粉料体系制备无溶剂重防腐环氧涂料。通过 EIS、划线盐雾剥离、耐 3. 5% NaCl溶液和 10% NaOH溶液、混合溶液浸泡后的附着力,研究了涂层屏蔽性、耐碱性、湿态附着力。结果表明：铁钛粉、 绢云母粉、长石粉粉料体系涂层屏蔽性、耐碱性最佳;改性脂环胺固化剂屏蔽性好,湿态附着力性能优异;采用 EIS、划线盐雾剥离,耐 3. 5% NaCl溶液、 10% NaOH溶液浸泡以及混合溶液浸泡后附着力下降程度来评价涂层屏蔽性、耐碱性、湿态附着力性能具有一定的可参考性,研究结果与涂层耐阴极剥离实验性能正相关,可用于涂层耐阴极剥离性能的早期评价与判断。     

氟碳丙烯酸乳液的制备与应用

以传统乳液聚合的方法,使用可聚合乳化剂,功能单体湿附着力促进剂MEEU,合成了具有核壳结构的氟碳丙烯酸乳液。通过红外、接触角、玻璃化转变等表征了产物的结构,并将氟碳丙烯酸乳液制备成水性工业漆,测试了氟碳丙烯酸乳液耐水、附着力及耐盐雾等性能。结果表明,具有特殊功能及结构的含氟碳丙烯酸乳液具有较好的耐水及耐盐雾性能,同时对金属基材有着优异的附着力。     

一种新型水性工业漆耐盐雾剂面向市场

摘自：www．China—coating．net 水性工业漆的耐腐蚀性和耐盐雾性能不如溶剂型涂料,这一直是制约水性工业漆的发展一个重要因素,因此提高水性工业漆的耐盐雾性具有重要的现实意义。近日,一种新型耐盐雾剂由北京之途化工有限公司和北京工业大学合作研制成功并且走向市场,它能显著提高涂层的耐腐蚀性能和耐盐雾性能。     

三层水性丙烯酸酯重防腐涂层的制备与性能研究

针对不同涂层的功能要求选用不同特点的成膜物质和功能填料,设计并制备了三层水性丙烯酸酯重防腐涂层材料。通过各功能涂层之间的独特配合,有效提高了涂层对重腐蚀介质的抗渗透性以及对碳钢的附着力,耐盐雾性能可以达到35 d。制备的涂层性能优于传统的溶剂型涂层,可用于抗酸、碱、盐或石油化工等重防腐领域。     

钢结构用水性环氧防腐底漆的研制

采用水性环氧固化剂乳化固化液体环氧树脂技术路线,制备钢结构用水性双组分环氧防腐底漆。该底漆VOC含量低,气味和毒性小,涂膜附着力强,耐水、耐碱、耐盐雾性能好。其性能可以达到溶剂型环氧底漆水平,成本与溶剂型环氧底漆相当。     

水性醇酸涂料在工程车上的应用

介绍了水性醇酸涂料在工程改装车基材表面的应用情况,重点阐述了该涂料在附着力、耐盐雾、耐候性等方面的性能,涂膜性能基本达到溶剂型涂料的水准。     

涂料和涂膜的检验、分析及评价

用刮擦测试评估界面附着力的能量模式,鳞片状Zn-15Al-5Mg—Ce合金油漆涂层的盐雾腐蚀研究,水性醇酸涂料耐盐雾的研究,有机无机杂化涂料的防腐蚀性能     

水性环氧涂料耐盐雾性影响因素的研究

研究了水性环氧涂料的乳液粒径与PVC(颜料体积浓度)对其耐盐雾性的影响。选择了粒径较小的乳液于适宜的PVC下配制水性环氧涂料,其耐盐雾性与溶剂型环氧涂料相当。通过对比,得出了水性环氧涂料的耐盐雾性不同于溶剂型环氧涂料的影响规律。     

水性环氧防腐涂料耐盐雾性能研究

介绍了盐雾腐蚀机理及影响水性环氧防腐涂料耐盐雾性能的各种因素 ,解决了一般水性环氧防腐涂料耐盐雾性能差的问题 ,其涂料性能与溶剂型防腐涂料基本接近。     

Insect antifeedant properties of anthranoids from the genusVismia

Vismiones and ferruginins, representatives of a new class of lypophilic anthranoids from the genusVismia were found to inhibit feeding in larvae of species ofSpodoptera, Heliothis, and inLocusta migratoria.     

Direct observation of freeze-thaw instability of latex coatings via high pressure freezing and cryogenic SEM

Despite its industrial importance, the subject of freeze-thaw (F/T) stability of latex coatings has not been studied extensively. There is also a lack of fundamental understanding about the process and the mechanisms through which a coating becomes destabilized. High pressure (2100 bar) freezing fixes the state of water-suspended particles of polymer binder and inorganic pigments without the growth of ice crystals during freezing that produce artifacts in direct imaging scanning electron microscopy (SEM) of fracture surfaces of frozen coatings. We show that by incorporating copolymerizable functional monomers, it is possible to achieve F/T stability in polymer latexes and in low-VOC paints, as judged by the microstructures revealed by the cryogenic SEM technique. Particle coalescence as well as pigment segregation in F/T unstable systems are visualized. In order to achieve F/T stability in paints, latex particles must not flocculate and should provide protection to inorganic pigment and extender particles. Because of the unique capabilities of the cryogenic SEM, we are able to separate the effects of freezing and thawing, and study the influence of the rate of freezing and thawing on F/T stability. Destabilization can be caused by either freezing or thawing. A slow freezing process is more detrimental to F/T stability than a fast freezing process; the latter actually preserves suspension stability during freezing. Presented at the 82nd Annual Meeting of the Federation of Societies for Coatings Technology, October 27–29, 2004 in Chicago, IL. Tied for first place in The John A. Gordon Best Paper Competition.     

Ethanol and (−)-α-Pinene: Attractant Kairomones for Bark and Ambrosia Beetles in the Southeastern US

In 2002–2004, we examined the flight responses of 49 species of native and exotic bark and ambrosia beetles (Coleoptera: Scolytidae and Platypodidae) to traps baited with ethanol and/or (−)-α-pinene in the southeastern US. Eight field trials were conducted in mature pine stands in Alabama, Florida, Georgia, North Carolina, and South Carolina. Funnel traps baited with ethanol lures (release rate, about 0.6 g/day at 25–28°C) were attractive to ten species of ambrosia beetles (Ambrosiodmus tachygraphus, Anisandrus sayi, Dryoxylon onoharaensum, Monarthrum mali, Xyleborinus saxesenii, Xyleborus affinis, Xyleborus ferrugineus, Xylosandrus compactus, Xylosandrus crassiusculus, and Xylosandrus germanus) and two species of bark beetles (Cryptocarenus heveae and Hypothenemus sp.). Traps baited with (−)-α-pinene lures (release rate, 2–6 g/day at 25–28°C) were attractive to five bark beetle species (Dendroctonus terebrans, Hylastes porculus, Hylastes salebrosus, Hylastes tenuis, and Ips grandicollis) and one platypodid ambrosia beetle species (Myoplatypus flavicornis). Ethanol enhanced responses of some species (Xyleborus pubescens, H. porculus, H. salebrosus, H. tenuis, and Pityophthorus cariniceps) to traps baited with (−)-α-pinene in some locations. (−)-α-Pinene interrupted the response of some ambrosia beetle species to traps baited with ethanol, but only the response of D. onoharaensum was interrupted consistently at most locations. Of 23 species of ambrosia beetles captured in our field trials, nine were exotic and accounted for 70–97% of total catches of ambrosia beetles. Our results provide support for the continued use of separate traps baited with ethanol alone and ethanol with (−)-α-pinene to detect and monitor common bark and ambrosia beetles from the southeastern region of the US.     

Methyl 2,4,6-decatrienoates Attract Stink Bugs and Tachinid Parasitoids

Halyomorpha halys (Stål) (Pentatomidae), called the brown marmorated stink bug (BMSB), is a newly invasive species in the eastern USA that is rapidly spreading from the original point of establishment in Allentown, PA. In its native range, the BMSB is reportedly attracted to methyl (E,E,Z)-2,4,6-decatrienoate, the male-produced pheromone of another pentatomid common in eastern Asia, Plautia stali Scott. In North America, Thyanta spp. are the only pentatomids known to produce methyl 2,4,6-decatrienoate [the (E,Z,Z)-isomer] as part of their pheromones. Methyl 2,4,6-decatrienoates were field-tested in Maryland to monitor the spread of the BMSB and to explore the possibility that Thyanta spp. are an alternate host for parasitic tachinid flies that use stink bug pheromones as host-finding kairomones. Here we report the first captures of adult and nymph BMSBs in traps baited with methyl (E,E,Z)-2,4,6-decatrienoate in central Maryland and present data verifying that the tachinid, Euclytia flava (Townsend), exploits methyl (E,Z,Z)-2,4,6-decatrienoate as a kairomone. We also report the unexpected finding that various isomers of methyl 2,4,6-decatrienoate attract Acrosternum hilare (Say), although this bug apparently does not produce methyl decatrienoates. Other stink bugs and tachinids native to North America were also attracted to methyl 2,4,6-decatrienoates. These data indicate there are Heteroptera in North America in addition to Thyanta spp. that probably use methyl 2,4,6-decatrienoates as pheromones. The evidence that some pentatomids exploit the pheromones of other true bugs as kairomones to find food or to congregate as a passive defense against tachinid parasitism is discussed.     

2005～2006年国外塑料工业进展

收集了2005年7月～2006年6月国外塑料工业的相关资料，介绍了2005—2006年国外塑料工业的发展情况。提供了世界塑料产量、消费量及全球各类树脂生产量以及各国塑料制品的进出口情况。作为对比，介绍了中国塑料的生产情况。按通用热塑性树脂（聚乙烯、聚丙烯、聚苯乙烯、聚氯乙烯、ABS树脂）、工程塑料（聚酰胺、聚碳酸酯、聚甲醛、热塑性聚酯、聚苯醚）、通用热固性树脂（酚醛、聚氨酯、不饱和树脂、环氧树脂）、特种工程塑料（聚苯硫醚、液晶聚合物、聚醚醚酮）的品种顺序，对树脂的产量、消费量、供需状况及合成工艺、产品开发、树脂品种的延伸及应用的扩展作了详细的介绍。     

2007～2008年世界塑料工业进展

收集了2007年7月～2008年6月世界塑料工业的相关资料,介绍了2007～2008年国外塑料工业的发展情况,提供了世界塑料产量、消费量及全球各类树脂的需求量及产能情况.按通用热塑性树脂(聚乙烯、聚丙烯、聚苯乙烯、聚氯乙烯、ABS树脂)、工程塑料(尼龙、聚碳酸酯、聚甲醛、热塑性聚酯、聚苯醚)、特种工程塑料(聚苯·硫醚、液晶聚合物、聚醚醚酮)、通用热固性树脂(酚醛、聚氨酯、不饱和聚酯树脂、环氧树脂)不同品种的顺序,对树脂的产量、消费量、供需状况及合成工艺、产品应用开发、树脂品种的延伸及应用的进一步扩展等技术作了详细介绍.