双组份水性聚氨酯材料的研发进展

双组份水性聚氨酯材料由羟基组份和异氰酸酯组份组成,羟基组份可分为羟基丙烯酸树脂、羟基聚氨酯树脂以及羟基聚酯树脂等,异氰酸酯组份可分为疏水型和亲水型。本文介绍了双组份水性聚氨酯材料的研究现状,并且分别阐述了国内外双组份水性聚氨酯涂料的羟基组分和异氰酸酯组分的特点、优缺点,最后对于双组份水性聚氨酯涂料存在的问题以及今后发展的趋势进行了说明。     

FE78—303R1604枣红金属闪光漆在富康轿车上的应用

该漆是以含羟基丙烯酸树脂和三胺树脂为主要成膜物质，加以改性聚酯树脂，等配制而成的双组份涂料，本文着重介绍了检施工应用方面的问题。     

丙烯酸聚氨酯涂料的研制

采用多羟基丙烯酸树脂作为羟基组分,ＨＤＩ缩二脲多异氰酸酯作为固化剂,配制成丙烯酸聚氨酯摩托车涂料。该涂料既保持了丙烯酸涂料优异的硬度、丰满度、光泽、耐候性和耐化学品性,又具有良好的附着力、柔韧性和耐磨性。介绍了该涂料的配方及其配制。比较了几种摩托车涂料的性能。讨论了涂料用原料的选择     

铁路客车碳纤维车体用水性底漆的制备及影响因素研究

以碳纤维样板为底材,以水性羟基丙烯酸树脂和水性多异氰酸酯为主要成膜物质,制备一种铁路客车碳纤维车体用水性底漆.介绍了该水性底漆原材料的选择及制备工艺,讨论了不同种类的树脂、固化剂、基材润湿剂等因素对涂料性能的影响.结果表明:以水性羟基丙烯酸树脂为A组分,以水性多异氰酸酯固化剂为B组分,通过添加聚醚改性硅氧烷类基材润湿剂...     

双组份水性聚氨酯耐磨抗划伤地坪面漆的研发及应用

探讨了羟基丙烯酸分散体、亲水改性聚异氰酸酯固化剂、蜡助剂、耐磨填料等因素对双组份水性聚氨酯涂料面漆的硬度、耐磨性和抗划伤性的影响;介绍了双组份水性聚氨酯地坪漆在中国的应用。     

溶解度参数在研制高性能丙烯酸聚氨酯涂料中的应用

本文采用革团贡献方法估算了双组份涂料中丙烯酸聚合物及固化剂HDI缩二毛的三维溶解度参数,并以此为基础选择了体系合适的溶剂：讨论了涂料成膜组份之间的相容性,分析了“雾影”的成因及消除“雾影”的方法,本实验将溶解度参数作为丙烯酸聚合物及其涂料配方设计的一项重要参数,并在此基础上制得了性能优良的丙烯酸聚氨酯涂料。     

双组份聚氨酯丙烯酸涂料用不黄变固化剂

1 前言 双组份聚氨酯丙烯酸涂料由于具有较全面的优异性能,现已作为轿车修补和大、中、小型客车原厂漆的主要品种之一。长期来,由于市场上可供的异氰酸酯固化剂品种较少,特别是不黄变型的异氰酸酯固化剂大都是HDI的缩二脲,至今国内各涂料厂基本上均     

水分散型羟基丙烯酸树脂的合成与性能研究

随着国家对水性涂料的重视程度逐渐提高,水性涂料的市场占有率也有了较大提升,作为水性涂料的基本成膜物质,水性树脂的研究极大限制了水性涂料的进一步发展。对水可分散型含羟基丙烯酸基础树脂的合成方案进行了研究,并对所制得产品进行制漆和性能表征,得到了一种高硬度、高光泽的水可分散型含羟基丙烯酸基础树脂,为下一步对该树脂的改性提供了基础数据,并为含羟基丙烯酸树脂的进一步研究提供了合理的解决方案。     

一种水性聚氨酯地坪涂料的制备及性能影响因素探讨

采用羟基丙烯酸乳液、水性聚氨酯固化剂、无重金属颜填料等原材料,制备了一种双组份水性聚氨酯地坪涂料,重点探讨了n(-NCO)/n(-OH)比例、颜基比及成膜温度对涂膜性能的影响,得到了一种性价比优异的环保型水性聚氨酯地坪涂料。     

脂肪族聚氨酯涂料

上海市涂料研究所研制生产的7650/7312和7470/7312聚酯聚氨酯涂料,7860/7312丙烯酸聚氨酯涂料,PS—90单组份聚氨酯涂料系最新开发的新一代聚氨酯涂料,与国内其它聚氨酯产品相比,它的最大特点是:长期阳光暴晒不变色不失光,具有特殊的装饰和防护性能。它将作为高新产品占领市场,前景极为广阔。 该系列产品是合成树脂—固化剂,双组份(或单组份)溶剂型涂料,选用优质颜料、填     

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。