埋地管道用水性环氧沥青防腐涂料的研制及性能研究

采用水性环氧树脂和水性乳化沥青为成膜树脂,以滑石粉为填料,以氧化铁红和磷酸锌为防腐颜料,制备出性能优异的环保型防腐涂料。着重讨了颜填料的种类及含量对漆膜性能的影响。实验结果表明：以水性环氧乳液6520与固化剂8538作为成膜体系并与乳化沥青共混作为成膜物质;氧化铁红和磷酸锌作为防锈颜料,滑石粉作为主要填料;当氧化铁红与磷酸锌配比为3:2且用量为60%时,颜填料体积浓度(PVC)为30%时漆膜（厚度180μm）的综合性能最优。     

水性环氧防腐底漆的制备及其性能研究

结合常规工业领域金属设备的防腐需求及日趋严格的涂料涂装环保要求,优选市售水性环氧树脂体系及固化剂,以铁红、磷酸锌、改性三聚磷酸铝为防锈颜料,探究了不同颜基比对涂层性能的影响,并通过配方设计及正交试验优化,制备出满足工业设备金属基材耐蚀性能要求的水性环氧防腐底漆。     

水性环氧防锈底漆的开发及性能研究

以水性环氧树脂乳液及水性环氧固化剂为主要成膜物质,氧化铁红与磷酸锌为防锈颜料,滑石粉和硫酸钡为填料,研制开发了一种性能优良的水性环氧防锈底漆。     

水性环氧防腐涂料的研制

以自制的环氧树脂乳状液为漆基、磷酸锌作为活性防锈颜料合成了水性环氧防腐涂料。研究了涂料中颜基比、固化剂与环氧树脂的当量比等对涂膜性能的影响。结果表明,颜基比小于1,固化剂CEN-537与环氧树脂E-44的当量比为1或稍大于1时,所得涂膜的各项性能指标可达到较好的平衡;涂料的防绣性能与以硅铬酸铅为防绣颜料的传统涂料相当。新研制的水性环氧防腐涂料性能达到了国外同类产品的水平。     

低温快干环氧防腐涂料的制备

通过选择环氧固化剂研制出了能在0℃条件下快速固化的环氧防腐涂料,并研究了在低温条件下环氧树脂、环氧树脂固化剂、防锈颜料等对干燥性能和防腐性能的影响。     

改性磷酸锌的防腐性能研究

研究了两种改性磷酸锌(磷酸铁锌、磷钼酸锌)的防腐性能,并与普通磷酸锌、铬酸锌的防腐性能进行对比.首先,采用电化学方法分析了防锈颜料提取液的防锈性能,结果表明磷钼酸锌的防锈性能优于普通磷酸锌,而磷酸铁锌的防腐性能反而不如普通磷酸锌,而磷酸系颜料的防锈性能均不如铬酸锌.其次,通过盐水浸泡和盐雾实验对几种防锈颜料在环氧涂层中的防腐性能进行了研究.盐水浸泡过程中的电化学阻抗谱表明磷酸铁锌能显著提高涂层的屏蔽作用,而通过涂层划痕后进行ASTM B-117实验发现磷酸铁锌能显著提高涂层与金属界面的附着力和涂层的屏蔽作用,而磷钼酸锌能提高涂层的耐锈蚀能力.从实验结果可以看出两种改性磷酸锌防锈颜料均可在实际应用中代替铬酸盐用于防腐涂料中.     

新型水性环氧防腐涂料的制备与性能研究

本文采用单组份水性环氧树脂为成膜物质,三聚磷酸铝、磷酸锌为复合防锈颜料,改性蛭石为防腐功能填料,研究了颜填料配方体系对涂料防腐性能的影响。结果表明：采用磷酸锌：三聚磷酸铝=3：2,改性蛭石添加量8%时所制备得到的防腐涂料性能最好。     

高性能水性环氧防腐涂料的研制

采用水性环氧树脂乳液和水性改性胺环氧固化剂作为成膜物质,同复配磷酸盐防锈颜料、水性助剂等研制成高性能水性环氧防腐涂料。该涂料安全环境友好兼具优异防腐性能,适用于对有严格环保安全要求的工业钢结构防腐领域。     

工业用改性环氧低表面处理底漆的研制

合成一种分子结构较大的异氰酸酯组分,作为环氧防腐底漆的固化剂,用于改性环氧底漆,使涂膜具有聚氨酯的柔韧性和环氧树脂的附着力,配以磷酸盐活性防锈颜料,使该防锈涂料具有良好的防锈性能、高度的弹性和柔韧性、优异的附着力,用于低表面处理的钢铁表面,可直接刷涂在旧的涂膜上,对底材处理不彻底的钢铁表面也表现出优异的防腐性能。     

新型环氧防腐涂料的研究

采用在环氧树脂中加入纳米复合铁钛粉防锈颜料WD—D-325、固化剂、制备了新型环氧树脂防腐涂料。由于纳米技术的特性，该防腐涂料具有较高的防腐性、优异的附着力和柔韧性。实验确定了复合铁钛粉防锈颜料在环氧防腐涂料中的添加量。作为新型的环保颜料，复合铁钛粉防锈颜料可以替代红丹、锌铬黄等颜料。     

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.     

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.     

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。