苯丙乳液水性防锈涂料的配方研究

以自制苯丙乳液为基料,通过加入多种防锈颜填料和助剂,制备出一种水性防锈涂料.研究了涂料中颜料体积浓度（PVC）、防锈颜料种类及用量、防锈颜填料之比、铁红和三聚磷酸铝质量之比、润湿分散剂用量、消泡剂对涂层性能的影响.试验结果表明,颜料体积浓度PVC=25％,颜填料比为1.6∶1,氧化铁红和三聚磷酸铝比为1∶1,润湿分散剂用量为涂料总量的0.7％,消泡剂A与B按质量比1∶1时,水性防锈涂料的综合性能最好.     

水性苯丙防锈底漆的研制及初期防闪锈性能的改进

以苯丙乳液为成膜物质,柠檬锶铬黄和纳米复合铁钛粉复配为防锈颜料,制备了一种水性环保防锈底漆.研究了颜填料体积浓度(PVC),防锈颜料柠檬锶铬黄和纳米复合铁钛粉的用量,以及分散剂、缓蚀剂的种类和用量对涂层防腐蚀性能的影响.结果表明,当涂料颜填料体积浓度在35%～40%之间,w(柠檬锶铬黄)=3%～5%,w(纳米复合铁钛粉)=6%～8%,w(复合型缓蚀剂)=0.25%～0.35%时,所制的水性防锈涂料性价比合适,初期防闪锈能力好,综合性能优良.     

水性集装箱外面漆的制备及性能研究

以水性丙烯酸和聚氨酯树脂作为成膜物质,制备出一种有较高耐老化和耐腐蚀性能的集装箱外用面漆.对影响面漆耐蚀性能的一些因素进行了研究,如树脂和颜料类型,消泡剂种类,分散剂种类及用量,以及纳米浆料添加量等.结果表明,当苯丙乳液与聚氨酯乳液以1:2的质量比复配作基料,选用浓缩型分子级消泡剂E,嵌段共聚物分散剂D用量为0.6%,...     

快干型水性丙烯酸改性环氧酯防锈底漆的研制

采用自制的快干型水性丙烯酸改性环氧酯乳液为基料,配以无毒的磷酸锌和氧化铁红作为防锈颜料,制得性能优良的水性丙烯酸改性环氧酯防锈底漆。对影响底漆性能的各种因素,包括防锈颜填料的用量、PVC(颜料体积浓度)、助剂、催干剂、中和剂等进行了探讨。     

水性自干防腐蚀涂料

以苯丙乳液为基料，铁红－磷酸锌－锌黄－氧化锌－硫酸钡－滑石粉为颜填料体系制备了水性自干防腐蚀涂料。列出了该涂料的性能指标。讨论了苯丙乳液类型、颜基比、防锈颜料、分散剂、成膜助剂等整体配方组分对涂料性能的影响。     

集装箱用水性聚氨酯外面漆的研制

以物理性能优异的水性聚氨酯树脂为主要成膜物质,并利用防腐性能优异的苯丙乳液对其进行共混改性,优选了无毒防锈颜料,制备出了一种综合性能优异的集装箱专用水性聚氨酯外面漆。结果表明:当丙烯酸树脂B的混入量为20%,以磷酸锌为防锈颜料,颜填料体积浓度(PVC)为25%时,外面漆的性能满足JH/T E01—2008集装箱涂料行业标准。并系统地考察了外面漆施工时易出现的流挂、针孔等漆膜弊病的影响因素及防治措施。     

钢结构轻防腐用水性丙烯酸底漆的制备

以苯乙烯-丙烯酸酯乳液为成膜树脂,制备了一种钢结构轻防腐用底漆,其性能符合HG/T 5176-2017标准的要求。研究了成膜树脂、颜填料、防闪锈剂和pH调节剂对漆膜防腐性能的影响。结果表明,当颜填料体积浓度(PVC)为40%～45%时,以苯丙乳液A为成膜树脂,以重质碳酸钙和滑石粉为主要的填料,同时使用防闪锈剂A、pH调节剂A、防锈颜料B和锶铬黄,所制备的水性丙烯酸底漆具有良好的防腐蚀性能。     

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。     

苯丙内墙乳胶涂料耐擦洗性能影响研究

合成了苯丙乳液,并以该乳液作为主要成膜基料,配以颜填料和助剂,制备了工程内墙涂料。考察了苯丙乳液配方中单体组成、功能单体用量、乳化剂用量和有机硅滴加工艺等对苯丙乳液性能及其内墙涂料耐擦洗性能的影响。     

水性多功能带锈防锈涂料的研制

以偏碱性的苯丙乳液为主要成膜物,优选出磷酸锌为防锈颜料,并从4种不同成分的转锈剂中选择了一种与该苯丙乳液相容性好并且转锈效果优异的转锈剂──2611,制备了水性带锈防锈涂料。研究了转锈剂2611和磷酸锌的用量、涂层的颜料体积浓度(PVC)对带锈涂料机械性能和防腐性能的影响。结果表明,当转锈剂2611的用量为配方总量的5%、磷酸锌的用量为配方总颜填料的21%、颜料体积浓度为33%时,制得了一种集渗透型、稳定型和转化型3类带锈防锈涂料特性于一体的多功能带锈防锈涂料,其综合性能较佳,耐盐雾腐蚀时间达到240 h以上,耐水性超过15 d。     

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。