防粘釜喷涂技术在127m~3聚合釜上的应用

介绍了不同防粘釜剂在聚合釜上的应用。结果表明 :NOXOLWSW (1)对釜壁及特殊部位防粘釜效果良好 ;(2 )对反应体系及PVC树脂质量无不良影响 ;(3)用量少且无毒 ,有利于环保 ;(4)粘釜减轻 ,有利于釜温、釜压控制 ,保证安全。除了对防粘釜剂进行对比选择之外 ,防粘釜剂雾化喷涂技术的进一步完善对防粘釜效果也起到了推进作用。经过对 8台聚合釜全线改造后 ,目前各牌号聚氯乙烯树脂的月优级品率可达到 93 % ,为公司创造了可观的质量效益     

防粘釜喷涂技术在127m^3聚合釜上的应用

介绍了不同防粘釜剂在聚合釜上的应用。结果表明：NOXOLWSW（1）对釜壁有特殊部位防粘釜效果良好;（2）对反应体系及PVC树脂质量无不良影响;（3）用量少且无毒,有利于环保;（4）粘釜减轻,有利于釜温、釜奔流控制,保证安全。除了对防粘釜剂进行对比选择之外,防粘釜剂雾化喷涂技术的进一步完善对防粘釜效果也起到了推进作用。经过对8台聚合釜全线改造后,目前各牌号聚氯乙烯树脂的月优级品率可达到93％,为公司改造了可观的质量效益。     

PVC防粘釜剂的汽雾化喷涂

ＰＶＣ防粘釜剂溶液的传统喷淋，无力喷及釜内的诸多死角。粘釜现象由此产生并加重。调整配方，将ＰＶＣ防粘釜剂溶液实现汽雾化喷涂，可将防粘釜剂喷涂到釜内的所有部位，经冷却后，在金属表面形成一层表膜，从而达到防止粘釜现象产生的目的。     

PVC生产中粘釜物的成因及防粘釜剂的应用

分析了ＰＶＣ生产中粘釜物的来源及减轻粘釜的方法。具体介绍了ＳＰＪ－ＦＡ防粘釜剂的性能及使用方法。     

WN型涂布剂防粘釜效果生产应用试验报告

在13.5m~3不锈钢聚合釜中采用WN型涂布剂防止氯乙烯悬浮聚合粘釜获得了连续聚合150釜次以上不清釜效果,清除死角处的粘釜物平均每釜为0.24kg,生产SG—3型树脂每聚合6釜喷涂一次,生产SG—6,7型树脂每聚合3釜喷涂一次,数据稳定,防粘釜效果显著,涂布剂无毒无味,对树脂质量无不良影响,操作简单易掌握,便于大生产。     

防粘釜剂在糊状PVC树脂生产中的应用

介绍了各种防粘釜剂(ETH/S3、博金、Everclean BL、SPJ-SPA)在上海氯碱化工股份有限公司糊状PVC树脂生产中的应用。结果表明：使用ETH／S3、博金、Everclean BL、SPJ-SPA防粘釜剂可节约辅助时间分别为0．39h、0．32h、0．41h、0．29h,从浆料分析的结果看。使用各种防粘釜剂对聚合浆料的质量都没有影响。     

PVC防粘釜剂的汽雾化喷涂

ＰＶＣ防粘釜剂溶液的传统喷淋，无力喷及釜内的诸多死角。粘釜现象由此产生并加重。调整配方，将ＰＶＣ防粘釜剂溶液实现汽雾化喷涂，可将防粘釜剂喷涂到釜内的所有部位，经冷却后，在金属表面形成一层表膜，从而达到防止粘釜现象产生的目的。     

WN型涂布剂在30m^3聚合釜上应用试验报告

在30m~3聚合釜中采用WN型涂布剂,完成332釜次生产应用试验,取得显著防粘效果。试验分三个阶段进行,在确认WN型涂布剂质量稳定的第三阶段试验中,重点考核了防粘效果和对产品质量的影响,在102釜次试验中,粘釜物累计15.2kg,平均每釜仅为0.15kg,此阶段高型号树脂的生产量占PVC树脂总生产量的55.8％;在相同条件下,采用JP—01型涂布剂的对比试验值分别为;124.89kg、1.22kg、47.1％。WN型涂布剂,对PVC树脂质量无不良影响。     

PVC聚合釜防粘釜技术

论述了PVC聚合釜防粘釜技术的机理及选择防粘釜剂的技术要点。重点介绍了自主开发的PVC聚合釜防粘釜喷涂设备及其操作要点。     

釜内制备β晶型聚丙烯

制备了传统的Ziegler-Natta催化剂,研究了采用釜内聚合添加β成核剂和采用釜外共混时添加β成核剂制备的β晶型聚丙烯(β-PP)的性能,结果发现:两种方法制备的PP中β晶含量都有所提高,产品的热变形温度及悬臂梁缺口冲击强度均有所改善。当釜内添加的β成核剂为430μg/g时,悬臂梁缺口冲击强度提高了30%左右,热变形温度提高了27℃左右。与釜外共混制备β-PP相比,釜内添加β成核剂制备β-PP时β成核剂用量更少,成核效果更显著。釜内添加154μg/g的β成核剂,其成核效果要好于釜外共混添加191μg/g的β成核剂。     

焦油一次汽化温度计算方法的探讨

利用相平衡原理得出的焦油蒸馏时一次汽化温度的计算方法,其结果与按经验公式的计算结果进行了比较,同时讨论了一次汽化温度与焦油馏分产率及二段蒸发器过热蒸汽用量的关系。     

Techniques for screening adhesives for structural applications

—Due to its chemistry, no structural adhesive system (epoxies, acrylics, etc.) is likely to offer an ideal combination of toughness, strength, moisture resistance, and ambient-temperature curing. Therefore, for effective use of adhesives in primary structures, an engineer must be able to identify adhesives that represent an optimum compromise among the different properties. In this paper, we present techniques for screening high-strength, ambient-temperature-curing adhesives for (1) moisture resistance under sustained loading and (2) fracture resistance in a way that is directly related to joint performance.     

Efficacy for Whitlockite for Augmenting Spinal Fusion

Whitlockite (WH) is the second most abundant inorganic component of human bone, accounting for approximately 25% of bone tissue. This study investigated the role of WH in bone remodeling and formation in a mouse spinal fusion model. Specifically, morphology and composition analysis, tests of porosity and surface area, thermogravimetric analysis, an ion-release test, and a cell viability test were conducted to analyze the properties of bone substitutes. The MagOss group received WH, Group A received 100% beta-tricalcium phosphate (β-TCP), Group B received 100% hydroxyapatite (HAp), Group C received 30% HAp/70% β-TCP, and Group D received 60% HAp/40% β-TCP (n = 10 each). All mice were sacrificed 6 weeks after implantation, and micro-CT, hematoxylin and eosin (HE) staining, and Masson trichome (MT) staining and immunohistochemistry were performed. The MagOss group showed more homogeneous and smaller grains, and nanopores (<500 nm) were found in only the MagOss group. On micro-CT, the MagOss group showed larger fusion mass and better graft incorporation into the decorticate mouse spine than other groups. In the in vivo experiment with HE staining, the MagOss group showed the highest new bone area (mean: decortication group, 9.50%; A, 15.08%; B, 15.70%; C, 14.76%; D, 14.70%; MagOss, 22.69%; p < 0.0001). In MT staining, the MagOss group demonstrated the highest new bone area (mean: decortication group, 15.62%; A, 21.41%; B, 22.86%; C, 23.07%; D, 22.47%; MagOss, 26.29%; p < 0.0001). In an immunohistochemical analysis for osteocalcin, osteopontin, and CD31, the MagOss group showed a higher positive area than other groups. WH showed comparable bone conductivity to HAp and β-TCP and increased new bone formation. WH is likely to be used as an improved bone substitute with better bone conductivity than HAp and β-TCP.     

Demand Increases for New Fungicides for Rice

<正> After June this year China's regions growingmiddle and late rice had widespread blastand sheath/culm blight.Such diseasesplagued 19.2 million hectares.Starting fromJuly the market for new fungicides that cancontrol blast and sheath/culm blight for ricewas more and more active.Makers of traditional pesticides for thecontrol of blast have to contend with fiercecompetition from new pesticides in marketthis year.Kitazine,iprobenfos,isoprothiolane and tricyclazole,oftenused by farmers in the past,are graduallybeing replaced by new varieties with high