松原针对汽车领域推出新型热稳定剂

韩国稳定剂生产商松原公司近期推出了Songxtend系列热稳定剂产品。Songxtend 1101和Songxtend 1102通用型稳定剂解决方案能够帮助PP生产商与加工商在高温环境下保持聚合物原有性能。Songxtend稳定剂还有助于在严苛的加工环境中避免降解和变色现象。在产品转换和终端应用中,稳定剂解决方案     

BOPP专用料稳定剂体系的优化

在均聚BOPP专用料生产中,采用新型抗氧剂GX2225和除酸剂Hycite713代替了传统稳定剂体系中的1010／168／CaSt配方,对BOPP专用料稳定剂体系进行了优化。结果表明,新稳定剂体系可稳定产品熔融指数,扩展产品加工温度范围,提高产品等级品率。     

PVC热稳定剂微胶囊化及其热稳定性研究

本文运用微胶囊化技术,应用全新的思路来开发新型聚氯乙烯热稳定剂。基于水滑石和钙/锌复合热稳定剂的物理性质,采用微胶囊技术中的有机相分离法来制微胶囊。用PVC做为囊壁来包裹热稳定剂,把微胶囊化的热稳定剂加到PVC材料中并测试其热稳定性。实验结果表明:微胶囊的粒径在100~450μm间;微胶囊加入量在3%时效果最佳。     

有机锡稳定剂的卫生性能

总结了我国PVC制品用有机锡稳定剂的应用现状及卫生性能,指出了目前有机锡稳定剂产品在开发、生产及其在PVC制品使用中在卫生性能控制上的不足,建议在产品开发、生产和使用中加强有机锡稳定剂卫生性能的研究和控制,以促进有机锡稳定剂在PVC制品中的健康发展。     

稀土稳定剂在UPVC异型材中的应用

分析研究了稀土稳定剂在UPVC异型材生产中的应用。采用3种稳定体系(铅盐单体、复合铅盐稳定剂、稀土稳定剂)所作的对比实验结果表明，在UPVC异型材中使用稀土稳定剂，其产品性能明显优于铅盐稳定剂。     

过氧化尿素的合成及其稳定性研究

研究了制备过氧化尿素(UP)的适宜条件,探讨了有机、无机及复合稳定剂对UP产品纯度及稳定性的影响。结果表明,稳定剂能提高UP的纯度,同时对UP的高温热稳定性影响较大。60℃、15 h的恒温实验结果表明,单一无机稳定剂中,NaH2PO4对UP的热稳定效果最好;单一有机稳定剂中,酒石酸对UP的热稳定效果最好;复合稳定剂对UP的热稳定效果均优于单一稳定剂。     

全球稳定剂市场将保持增长

<正>德国调研机构Ceresana最近公开了一份关于在多数塑料中使用的稳定剂和助剂的研究报告。Ceresana称,到2021年全球稳定剂市场将增至53亿美元。最重要是基于钙类、铅类和锡类稳定剂以及液态稳定剂和光稳定剂。而且近年来出现越来越多的含铅产品替代品;而且对环境友好型稳定剂的需求也不断增加,尤其在欧盟国家中。该报告还预测全球含钙稳定剂的年增长率将     

新型塑料稳定剂“8505”和“8601”通过省级鉴定

“8505”无毒透明钙锌复合稳定剂,在无毒聚氯乙烯软制品和不透明的硬制品中,可以完全代替有机锡稳定剂;在透明的聚氯乙烯硬制品中,可以代替大部分的有机锡稳定剂。有较好的社会效益和经济效益,该产品在目前国内的钙锌稳定剂系列中性能处于领先地位并填补了省内空白。“8601”无毒亚     

更环保的创新，更卓越的服务

在Chinaplas 2012展会中，科聚亚旗下的抗氧剂、光稳定剂部门详细介绍了今年新推出的新型氧化剂、紫外线稳定剂和聚合物改性剂产品。     

钙锌稳定剂在PVC-U塑料异型材生产中的应用

以钙锌稳定剂替换铅盐稳定剂作为生产PVC-U塑料异型材的热稳定剂。研究了钙锌稳定剂PVC混配料技术,优化了塑料异型材的生产配方和生产工艺;评估了用挤出成型的方法生产含钙锌稳定剂的环保塑料异型材,在高温、高剪切、高速挤出条件下加工时的流变特性及产品性能。结果表明:使用钙锌稳定剂代替铅盐稳定剂用于生产PVC-U塑料异型材是可行的,且产品使用性能好,环保性能符合RoHS指令。     

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。