整机产品防锈工艺研究

为提高整机产品的耐腐蚀性能,三一港机工艺院会同集团精益质量总部进行了防锈材料筛选试验,旨在通过对多种防锈材料的防锈性能试验对比,优选出性价比最佳的防锈材料,并在产品上进行使用,以提高产品整体耐蚀性能.     

新型防锈颜料在工业涂料中的应用

从防腐涂料的防锈机理入手,介绍了新型防锈颜料的种类,分析了新型防锈颜料的发展方向。通过实例对比分析说明了新型防锈颜料在工业防腐领域的应用优势。     

环保型亚磷酸钙防锈涂料的研制

用无毒亚磷酸钙作为主要防锈颜料,磷酸盐作为辅助防锈颜料,研制了一种环保型亚磷酸钙防锈涂料。按国标测定了该涂料的性能指标,并与传统的红丹、锌铬黄、磷酸锌等防锈涂料进行对比试验。试验结果表明,亚磷酸钙涂料的防锈性能与红丹防锈涂料相当,优于锌铬黄、磷酸锌防锈涂料。     

环保型防锈钝化工艺

1 前言 笔者曾报导一种防锈钝化剂用于金属及磷化膜的防锈[1],虽防锈效果极佳,但存在下列问题:(1) 防锈钝化膜在湿度较大的存放条件下有时返潮,可能影响与涂料的附着力;(2) 彩色磷化膜经防锈钝化后色泽变浅,鲜艳度降低(因防锈钝化液的pH值≥10,膜层有褪色现象);(3) 防锈钝化液在使用过程中较易形成白色沉淀物,需定期清除.     

低成本铁红水性防锈涂料的制备

介绍了以氧化铁红为体质防锈颜料、磷酸锌和氧化锌为化学防锈颜料、红云母为片状颜料,苯丙乳液为基料的水性防锈涂料的制备。对影响其性能的因素进行了分析,并与溶剂型防锈涂料进行了性能对比。     

防锈油在机械零件上的应用试验

本文介绍了HH932脱水防锈油的防锈性能、工艺性和经济价值，举出了在工厂中工序间及封存防锈和对已锈零件的去锈、防锈处理的应用实例。     

水性纳米改性苯丙防锈底漆的研制

本试验选用无皂聚合工艺制备的水性苯丙防锈乳液为基料,氧化铁红与三聚磷酸铝组成防锈体系,添加纳米SiO_2浆料,制备的水性纳米改性苯丙防锈底漆性能达到溶剂型醇酸防锈涂料的水平,并分析了乳液、防锈颜料、纳米SiO_2对水性苯丙防锈底漆性能的影响。     

几种水性防锈漆的性能比较

以丙烯酸改性环氧酯、苯丙、纯丙乳液为漆基制备水性防锈漆,与溶剂型醇酸防锈漆比较,研究了几种水性防锈漆涂膜的机械性能与防锈性能,分析了水性防锈漆的防锈机理以及导致不同防锈漆之间防锈性能差异、涂层耐水性与耐盐水性差异的原因。     

金属防锈漆的研究开发

通过对化学防锈颜料的选择,筛选出较好的金属防锈漆配方,并尝试从它们的防锈机理上对其防锈性能做出解释,同时也简要分析戍膜物和填料对金属防锈漆的影响。     

新型防锈颜料的发展

本文主要略述了锈蚀如何产生以及危害性，并阐述了传统的防锈颜料和防锈方法。随着环境保护的发展，国内外又开发了１０多种新型的防锈颜料及方法，最后论述了防锈颜料的４点发展前景。     

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。