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本文主要描述了偏苯三酸酐与2-乙基己醇合成增塑剂偏苯三酸三辛酯。通过实验,从钛酸四丁酯、铝酸钠、氧化亚锡等非酸性催化剂中选择了酯化催化性能良好的氧化亚锡作为催化剂,并探讨了催化剂氧化亚锡的用量、酸醇物质的量比、反应时间及催化剂氧化亚锡的重复使用对反应结果的影响。实验结果表明,氧化亚锡催化合成偏苯三酸三辛酯的最佳条件为:酸醇比为n(偏苯酸酐):n(2-乙基己醇)=1:4.5(摩尔比),催化剂用量为偏苯三酸酐质量的0.6%,反应时间为4小时,反应温度为220~238℃,催化剂氧化亚锡可以重复使用,酯化率可达99.9%。 相似文献
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探索了对苯二甲酸和异辛醉在钛酸四丁酯催化下制备对苯二甲酸二异辛酯(DOTP)的反应规律,在醇、酸摩尔比为2.7~3.0:1,催化剂用量为0.5~0.7(wt%)时,DOTP的产率大于99.5%。 相似文献
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氧化亚锡催化合成偏苯三酸三异辛酯(TOTM) 总被引:2,自引:0,他引:2
主要研究了偏苯三酸酐与2-乙基己醇合成增塑剂偏苯三酸三异辛酯的反应过程,从氧化亚锡、钛酸四丁酯,偏铝酸钠,固体超强酸等4种非酸性催化剂中选择了酯化催化性能良好的催化剂-氧化亚锡,确定了氧化亚锡的用量,原料酯比以及反应时间对酯化反应的影响,最终确立了酯化过程的最佳工艺条件,醇酐比为4.0:1,在反应温度210℃下加热2小时,偏酐转化率为99.88%。 相似文献
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偏苯三酸类增塑剂系列产品包括偏苯三酸三辛酯、偏苯三酸三(810)酯、偏苯三酸三甘油酯等。这类聚酯型增塑剂具有非常优良的增塑加工性能,其中偏苯三酸三甘油酯更是此类聚酯中的佼佼者。其耐低温性、耐高温性、耐挠曲性能十分优良。在德国、美国等发达国家中已大量用于汽车制造、民用体育场所等。国内目前还仅限于偏苯三酸三辛酯的生产,对偏苯三酸三甘油酯产品还远未进行开发。 相似文献
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采用复合酸催化剂合成顺丁烯二酸二辛酯磺酸钠,最佳工艺条件;酐醇的摩尔比为1:3,复合催化剂用量为0.5%,酯化温度135℃,真空度26.7kP,酯化时间3.5h。同时考察了影响渗透剂渗透力的几个因素。 相似文献
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天津市中河化工厂试制的偏苯三酸三辛酯耐高温增塑剂已通过市级技术鉴定。 这种增塑剂挥发性低、迁移性小。耐抽出和耐久性类似聚酯增塑剂;相容性、加工性和低温性类似邻苯二甲酸酯类增塑剂。 偏苯三酸三辛酯可用作90℃级和105℃级PVC电缆料的主增塑剂。 经有关专家鉴定认为,该产品质量达国内领先水平,产品性能指标达到日本同类产 相似文献
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《上海塑料》2007,(1):28
本发明一种丁腈橡胶与聚丙烯热塑性硫化胶,其组分中增塑剂采用主增塑剂或主增塑剂与辅增塑剂。主增塑剂为偏苯三酸三辛酯,辅增塑剂为环氧大豆油。热塑性硫化胶的主要组成及质量分数如下:丁腈橡胶60%~75%,聚丙烯40%~25%,相容剂A马来酸酐接枝聚丙烯10%,相容剂B端胺基液体丁腈橡胶5%,主增塑剂偏苯三酸三辛酯30%~50%,辅增塑剂环氧大豆油0~20%。硫化剂7%~10%,促进剂1%~2%。本发明热塑性硫化胶的硬度(邵氏)58A~80A,耐油质量变化率0.64%~6.3%,拉伸强度3.6%~12.8%。它是一种低硬度、高耐油、流动性好的丁腈橡胶与聚丙烯热塑性硫化胶。 相似文献
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阻燃,低烟,耐热聚氯乙烯电缆料配方研究 总被引:3,自引:2,他引:1
报道了三氧化二锑、硼酸锌、氢氧化铝及碳酸钙对聚氯乙烯电缆料阻燃性和发烟性的影响,同时还就增塑剂邻苯二甲酸二辛酯、己二酸二辛酯、乙二酸-1,2-丙二醇聚酯、偏苯三酸三辛酯对聚氯乙烯电缆料阻燃性、发烟性及热老化性的影响进行了讨论。研究结果表明,最佳配方的延燃时间为3.02s,极限氧指数为31.8,无焰单位质量烟密度(Dm/g)为14.5,其他主要性能指标达到GB8815-88关于105℃绝缘级软聚氯乙 相似文献
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描述了偏苯三酸酐与2-乙基己醇合成增塑剂偏苯三酸三辛酯.通过实验,从钛酸四丁酯、铝酸钠、氧化亚锡等非酸性催化剂中选择了酯化催化性能良好的氧化亚锡作为催化剂,并探讨了催化剂氧化亚锡的用量、酸醇物质的量比、反应时问及催化荆氧化亚锡的重复使用对反应结果的影响.实验结果表明,氧化亚锡催化合成偏苯三酸三辛酯的最佳条件是:酸醇比为n(偏苯酸酐):n(2-乙基己醇)=1:4.5(摩尔比),催化剂用量为偏苯三酸酐质量的0.6%,反应时间为4 h,反应温度为220~238℃,催化剂氧化亚锡可以重复使用,酯化率可达99.9%. 相似文献
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M. S. J. Simmonds W. M. Blaney F. Delle Monache M. Marquina Mac-Quhae G. B. Marini Bettolo 《Journal of chemical ecology》1985,11(12):1593-1599
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. 相似文献
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Cheng-Le Zhao Shane Porzio Alan Smith Haiyan Ge H. T. Davis L. E. Scriven 《Journal of Coatings Technology and Research》2006,3(2):109-115
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. 相似文献
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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. 相似文献
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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. 相似文献
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中蓝晨光化工研究院有限公司《塑料工业》编辑部 《塑料工业》2009,37(3)
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. 相似文献
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中蓝晨光化工研究院《塑料工业》编辑部 《塑料工业》2007,35(3):1-25,67
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。 相似文献