国产淤浆聚乙烯催化剂替代进口

辽阳石化公司在3.5万吨/年高密度聚乙烯(HDPE)A线连续聚合装置上进行的高效淤浆工艺聚乙烯催化剂(JM-1催化剂)工业化应用试验获得成功。截至1月10日,共生产776吨L0555P和L0153P氯化聚乙烯专用料,产品全部达到优级品标准。     

中国石油大学成立西部研究院

辽阳石化公司在3．5万吨／年高密度聚乙烯（HDPE）A线连续聚合装置上进行的高效淤浆工艺聚乙烯催化剂（JM-1催化剂）工业化应用试验获得成功。截至1月10日,共生产776吨L0555P和L0153P氯化聚乙烯专用料,产品全部达到优级品标准。     

国产淤浆聚乙烯催化剂替代进口

<正> 中国石油辽阳石化公司在35 kt·a~(-1)高密度聚乙烯A线连续聚合装置上进行的高效淤浆工艺聚乙烯催化剂——JM-1催化)工业化应用试验获得成功。截至2010年1月10日,共生产776 t的L0555P和L0153P氯化聚乙烯专用料,产品全部达到优级品标准。     

釜式淤浆法生产高密度聚乙烯工艺及催化剂研究进展

介绍了用于生产高密度聚乙烯的三井油化公司CX工艺及Basell公司Hostalen工艺;总结了於浆工艺聚乙烯催化剂(三井油化PZ、RZ催化剂,北京化工研究院的BCH、BCE催化剂,辽宁向阳科化集团的XYH催化剂,Basell公司的TH催化剂、铬系催化剂,辽阳石化的JM-1催化剂)的特点;对各个催化剂的优缺点进行了对比;对我国淤浆工艺高密度聚乙烯催化剂的研究和应用提出了建议。     

脂肪醇在聚烯烃催化剂中的应用

Z-N催化剂在聚烯烃装置中占有很大的应用比例,而利用脂肪醇改性后的催化剂广泛应用于三井化学株式会社CX工艺、巴塞尔Hostalen工艺生产高密度聚乙烯。介绍了PZ/RZ、JM-1、BCH、BCE、XY-H、SLC-SP2等催化剂的制备方法,并对脂肪醇在催化剂中的作用及含量进行了说明。     

氯化聚乙烯专用HDPE树脂粉料的生产和性能

氯化聚乙烯(CPE)专用高密度聚乙烯(HDPE)QL505P具有适宜的密度、熔体流动速率和均匀的颗粒粒径分布,适合生产CPE。QL505P氯化过程工艺平稳,反应压力、时间及氯化过程能耗、物耗与1#同类HDPE样品相当,且QL505P生产的CPE产品各项性能也与1#样品生产的氯化产品相当。     

高效淤浆PE催化剂工业化试验成功

辽阳石化日前在3．5万吨／年高密度聚乙烯装置上进行了高效淤浆工艺PE催化剂（JM－1催化剂）工业化应用试验并获得成功。截至目前,试验生产出的氯化聚乙烯专用料全部达到优级品标准。     

氯化聚乙烯专用HDPE树脂的生产现状及市场分析

我国氯化聚乙烯专用HDPE树脂在质量和数量上均不能很好地满足国内氯化聚乙烯的生产的需要,文章介绍了国内的氯化聚乙烯专用HDPE树脂生产厂家、工艺、牌号及产量,对该专用树脂的市场情况、生产成本和经济效益做了分析,并对我国氯化聚乙烯专用树脂的开发和生产提出建议。     

茂金属聚乙烯管材料mPE P3806R的工业化开发

在气相法聚乙烯装置上,采用专用茂金属催化剂和改进的工艺条件,以己烯为共聚单体,成功实现茂金属聚乙烯管材料mPE P3806R的工业化生产。通过凝胶渗透色谱仪和力学性能测试研究了mPE P3806R的结构和性能,并和国产同类产品进行对照。结果表明:mPE P3806R产品性能达到国产同类产品水平,满足耐热聚乙烯管材对原料的要求,具备放量生产的条件。     

氯化聚乙烯橡胶的三段水相悬浮法合成工艺

氯化聚乙烯橡胶(CM)的三段水相悬浮法合成工艺是在水相悬浮体系中对高密度聚乙烯(HDPE)进行低温、中温、高温3个温度段氯化而制备CM。该法对设备材质要求低、生产过程易控制、产品质量稳定、生产效率高;氯化反应均匀,产品几乎无HDPE残留结晶;通过原料选择,控制低温、中温、高温3个氯化温度段的氯气通入量以及最高氯化温度,可以制备门尼粘度和强度性能不同的CM,满足客户的特定需求。     

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.     

Novel polyurethane coating technology through glycidyl carbamate chemistry

Glycidyl carbamate chemistry combines the excellent properties of polyurethanes with the crosslinking chemistry of epoxy resins. Glycidyl carbamate functional oligomers were synthesized by the reaction of polyfunctional isocyanate oligomers and glycidol. The oligomers were formulated into coatings with several amine functional crosslinkers at varying stoichiometric ratios and cured at different temperatures. Properties such as solvent resistance, hardness, and impact resistance were dependent on the composition and cure conditions. Most coatings had an excellent combination of properties. Studies were carried out to determine the kinetics of the curing reaction of the glycidyl carbamate functional oligomers with multifunctional and model amines. Detailed kinetic analysis of the curing reactions was also undertaken. The results indicated that the glycidyl carbamate functional group is more reactive than a glycidyl ether group. Presented at the 82nd Annual Meeting of the Federation of Societies for Coatings Technology, on October 27–29, 2004, in Chicago, IL.     

Highly moisture-proof polysilsesquioxane coating prepared via facile sol-gel process

A highly moisture-proof polysilsesquioxane coating was obtained from a new bis-silylated precursor, which was synthesized from 3-aminopropyltriethoxysilane (APTES) and m-xylylene diisocyanate (m-XDI) in tetrahydrofuran (THF) and verified by ¹H MAS NMR. For direct comparison purposes, an SiO₂ coating was also prepared by the Stöber method using tetraethoxysilane (TEOS) as the reactant. Interestingly, the coating obtained from the polysilsesquioxane sol exhibited a much higher moisture resistance capability than its counterpart, which was attributed to its more compact feature between nanoparticles as characterized by N₂ absorption experiment and transmission electron microscopy (TEM). Furthermore, its high transparency of about 92% showed potential for application in the protection of optical crystals.