迈图携手联成在镇江投资酚醛树脂项目

<正>美国专用化学品和材料生产商迈图专用化学品公司与联成化学科技股份有限公司宣布,双方签署最终的合资企业协议,共同成立Momentive Union Specialty Chemicals公司。将在中国建立工厂,生产专用酚醛树脂。     

美国迈图公司酚醛树脂项目落户镇江新区

本刊讯美国迈图精细化工有限公司副总经理马塞洛·波德里尼一行,日前专程来到江苏省镇江市与镇江联成化学工业有限公司董事长柯衣绍等人进行洽谈,确定在镇江新区投资建设酚醛树脂项目。镇江市有关方面负责人介绍,2011年12月,美国专用化学品和材料生产商—迈图精细     

道康宁和瓦克公司在中国的有机硅合资企业投产

本刊讯 道康宁公司作为世界最大的有机硅生产商,拥有约80亿欧元／年（110亿美元／年）有机硅市场的35％份额,中国装置是该公司继美国肯塔基州Carrollton和英国Barrv之后,生产硅烷的第三大支柱。     

科菜恩在中国成立了生产五氧化二磷的新合资公司

为了保证产品供应,并满足市场对五氧化二磷（P2O5）日益增长的需求,世界领先的特种化学品生产商科莱恩公司将携手两家中国公司在云南省昆明建立一家合资企业。同时,新公司将会在我国建立一家先进的五氧化二磷生产工厂,该工厂计划于2010年的第一季度正式投产。     

科莱恩在中国成立生产五氧化二磷（P205）的新合资公司

（2009年3月16日,香港）,为了保证产品供应,并满足市场对五氧化二磷日益增长的需求,世界领先的特种化学品生产商科莱恩公司将携手两家中国公司在云南省昆明市建立一家合资企业。同时,新公司将会在中国建立一家先进的五氧化二磷生产工厂,该工厂计划于2010年的第一季度正式投产。     

科莱恩在华成立五氧化二磷新合资公司

为了保证产品供应,并满足市场对五氧化二磷日益增长的需求,世界领先的特种化学品生产商科莱恩公司将携手两家中国公司在云南省昆明市建立一家合资企业。同时,新公司将会在中国建立一家先进的五氧化二磷生产工厂,该工厂计划于2010年的第一季度正式投产。     

Dynasol公司在中国组建橡胶合资企业

西班牙雷普索尔公司与墨西哥Kuo集团的合资企业Dynasol公司于2011年1月7日宣布,与中国山西北兴安化学工业公司签订协议,将在中国联合生产并销售合成橡胶。Dynasol公司与北兴     

Central玻璃预与圣戈班合创中国合资企业

Central玻璃与圣戈班已宣布将在中国构建一个汽车玻璃制造工厂,根据两家公司的联合声明,该设施将由日本的一个控股公司创建,作为合资企业的一部分。本厂将以建立在山东省青岛的圣戈班所属房产,投资大约6880万美元（1790万美元用于建立）来“适应中国汽车市场的需求,并已快速增加成长。”两家公司希望投资建立工厂分为三个阶段     

科莱恩在中国成立生产五氧化二磷(P2O5)的新合资公司

(2009年3月16日,香港),为了保证产品供应,并满足市场对五氧化二磷日益增长的需求,世界领先的特种化学品生产商科莱恩公司将携手两家中国公司在云南省昆明市建立一家合资企业。同时,新公司将会在中国建立一家先进的五氧化二磷生产工厂,该工厂计划于2010年的第一季度正式投产。     

陶氏化学与阿克萨公司组建碳纤维及衍生物合资企业

<正>陶氏化学公司于2011年6月6日宣布,其陶氏欧洲子公司与总部在伊斯坦布尔的阿克萨(AksaAkrilik Kimya Sanayi)i公司签约组建碳纤维及衍生物制造与全球性的商业化合资企业。两家公司将为制造和向全球供应碳纤维及衍生物创建完全一体化的生产     

帝斯曼在中国兴建世界级复合材料树脂工厂

全球生命科学与材料科学专业公司荷兰皇家帝斯曼集团2月25日宣布其合资公司金陵帝斯曼树脂有限公司(以下简称:金陵帝斯曼)将投资约5亿元人民币在中国南京建造一座新的复合材料树脂工厂,取代其现有工厂,并成为世界上最大的复合材料树脂工厂之一。帝斯曼在该项投资中的份额为75%。     

Structural analysis of phenolic resole resins

The chemical structure and cure characteristics of a group of phenolic resole resins were studied by means of three major analytical techniques. In particular, the effects on structure and reactivity of formaldehyde/phenol ratio and the type of reaction catalyst used were studied. Gel permeation chromatography was used to determine resin molecular weight distributions, and NMR, to determine chemical structural features. In this connection a selective oxidation procedure, converting free methylol groups to adehydes, has allowed unambiguous determination of methylene ether bridge structures to be made from the NMR data. The F/P ratio in a resole largely determines the type of molecular structures which are formed. However, triethylamine as a catalysts tends to favor methylene ether bridge formation, whereas sodium hydroxide favors methylene bridges. The rate and direction of subsequent thermal cure of the resoles prepared is shown by differential scanning calorimetry to depend markedly on the type of catalyst present during the curing stage. The DSC curing curves are interpreted in the light of the structural information provided by NMR.     

Shelf life of phenolic resole resins

Viscosity, number-average and weight-average molecular weights (measured by gel permeation chromatography), and carbon-13 nuclear magnetic resonance (NMR) were used to monitor the changes in phenolic resoles as a function of time and pH. It was observed that phenolic resoles with pH around 5 are more stable, as indicated by the lowest increase in viscosity and molecular weight. Carbon-13 NMR spectroscopic studies also suggest that the concentration of methylol groups is higher for resoles with pH around 5 and, thereby, indicate a slower reaction.     

Characterization of fractionated phenolic resins used in photoresists

Novolak resins fractionated using a liquid/liquid centrifugal fractionation/separation technique were characterized and contrasted to resins fractionated by conventional methods. The new fractionation method resulted in higher yields of resins with comparable or improved functional properties when used in i‐line sensitive (365 nm) photoresist formulations. By characterizing the isolateld resin and the lower molecular weight (Mw) fractions removed during fractionation, a better understanding of the structural differences associated with the fractionation processes could be determined. The potential for improving the fractionation/separation process and for obtaining higher yields and more consistent resists with the resins was identified.     

酚醛树脂的改性研究进展

综述了近3年采酚醛树脂耐热和增韧改性的研究进展简要介绍了各种方法的改性机理及研究现状最后对酚醛树脂改性方法的发展前景作出了展望.     

Optimization of phenolic resins for friction materials

The physicomechanical properties of phenolic composites containing a large amount of mineral fillers were enhanced through a chemical modification of the basic resin. Various phenolic compounds were first introduced in the condensation mixture leading to modified novolaks, but the final properties of the resulting composites were only slightly improved. Better results were obtained using an optimum content of epoxy-novolak or melamine in the last stage of processing as confirmed by static and dynamic mechanical analysis. The new procedure introduced recently by Halpin and Sendeckyj for fitting fatigue models was applied to our particle-filled material. The results confirm the reinforcement of the composite through the co-reactivity of phenolic resins with the introduced species in the final curing stage.     

木质素改性酚醛树脂的研究进展

人造板工业用的酚醛树脂胶,虽然粘接性能好,但在制造和使用的过程中都会释放出污染物甲醛,而木质素分子中有酚羟基和醛基,使用木质素,既可改善胶粘剂的性质,又可节约苯酚的用量,降低甲醛释放量,达到废物利用与保护环境的目的本文综述了木质素磺酸盐、碱木质素、甘蔗渣木质素、酶解木质素等代替部分苯酚应用于环保树脂胶的制备工艺及研究发展现状,并对其发展前景作了展望     

Graphitization of phenolic resins for carbon-based refractories

The chemical resistance and thermo-mechanical properties of refractories bonded with resole or novolak resins depend on the presence of crystalline carbon phases (preferentially with features close to graphite ones) in their compositions. Although thermosetting resins are commonly classified as non-graphitizing carbon sources, many efforts have been made in recent years in order to find effective routes to induce the in situ graphitization of such components in refractory products during service. This work evaluates the role of processing parameters (mixing, curing and firing temperature) and additives (ferrocene, boric acid and exfoliated graphite) in the graphitization process of two commercial resins (resole and novolak) and a synthesized one (modified-novolak). X-ray diffraction, Raman spectroscopy and thermogravimetric analyses were carried out to identify the microstructural evolution of the compositions. According to the results, carbon graphitization was already detected after firing the samples at 1000 °C for 5 h under reducing atmosphere. Ferrocene addition favored a more effective graphitization of the selected resins, but H₃BO₃ also induced the rearrangement of the carbon derived from the commercial novolak product. The mixing and curing procedures used when preparing the compositions proved to be very important steps as they affected, to a greater extent, the resulting graphitization degree of the fired samples.