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O. Pauli 《European Journal of Lipid Science and Technology》1966,68(4):275-279
Fungicidal and Bactericidal Paints — New Additives for the Oil and Synthetic Resin Lacquers New fungicides, which replace completely the mercury additives in oil, alkyd and synthetic resin lacquers, were developed. In contrast to the mercury additives, they can also be used in the stoving lacquers. They are only of limited use in insulating varnishes. The experience with these additives in different lacquer systems is reported. A combined testing method can give a practicable judgement about the fungicidal activity of such paints in a short time. 相似文献
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In a free material formulation, the problem of minimizing a weighted sum of compliance’s from multiple load cases, subject to an active constraint on material volume, is solved in a formulation with two optimality criteria. The first optimality criterion for the distribution of material volume densities is equal value for the weighted elastic energy densities, as a natural extension of the optimality criterion for a single load case. The second optimality criterion for the components of a constitutive matrix (of unit norm) is proportionality to corresponding weighted strain components with the same proportionality factor \(\widehat \lambda \) for all the components, as shortly specified by \(C_{i j k l} = \widehat \lambda \sum _{n} \eta _{n} (\epsilon _{i j})_{n} (\epsilon _{k l})_{n}\) , in traditional notation (n indicate load case). These simple analytical results should be communicated, in spite of the practical objection against design for weighted sum of compliance’s, as compared to worst case design and design considering strength. The application of the approach of the two optimality criteria is illustrated by a 2D example with 8 load cases. Stable and fast convergence is shown. 相似文献
5.
An electrodiffusional three-segment probe was developed with which local axial and radial liquid velocities can be determined.
Application of this probe in gas-liquid flow yields information on local gas hold-up. In coalescing media the commonly used
redox-system Fe(CN)
6
3−
/Fe(CN)
6
4
should be replaced by dissolved oxygen as depolarizer. Measurements of local axial and radial liquid velocity and turbulence
intensity in different bubble columns (D = 150 and 600 mm) showed good agreement with data obtained by hotfilm anemometry.
This paper was presented at the International Workshop on Electrodiffusion Diagnostics of Flows held in Dourdan, France, May
1993. 相似文献
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Title of program: CATAR Catalogue number: ABGP Program obtainable from: CPC Program Library, Queen's University of Belfast, N. Ireland (see application form in this issue) Computer: UNIVAC 1108; Installation: Sandoz A.G., Basel, Switzerland Operating system: EXEC 8 Programming language used: FORTRAN IV High speed store required: 26K words No. of bits in a word: 36 Overlay structure: None Number of magnetic tapes required: None Other peripherals used: Card reader, line printer Number of cards in combined program and test deck: 3136 Card punching code: BCD 相似文献
8.
Preparation and characterisation of α-methylstyrene–butadiene latexes for paper coating applications
Antero Laitinen Martti AlkioUlla Forsström Ali HarlinHarri Heikkinen Juha KaunistoAnnaleena Kokko Hille RautkoskiLea Räsänen 《Progress in Organic Coatings》2012
The purpose of this work is to demonstrate how α-methylstyrene (AMS) can replace styrene in preparing styrene–butadiene (SB) type latexes and to compare the properties of the paper coating of the prepared α-methylstyrene–butadiene emulsion with the commercial styrene–butadiene latex reference sample. A lot of work is nowadays being conducted on different biorefinery concepts replacing fossil oil with biomass based raw materials due to the expected rise of the fossil oil cost. Aromatics can in principle be produced from renewable raw materials, such as lignin, sugars and terpenes for example. The potential methods include thermochemical conversions, catalytic fast pyrolysis, metabolic engineering, catalytic aromatisation and dehydrogenation among others. Terpenes, such as α-limonene and pinene, are possible sources of aromatics, and they can indeed be catalytically converted to p-cymene. Industrial hydrodealkylation and disproportionation processes developed by major petrochemical companies can further convert p-cymene to BTX aromatics or simultaneously dehydrogenate the alkyl chain of p-cymene to styrenic monomers such as α-methylstyrene. Based on the measured paper properties for uncalendered and calendered coated samples, AMS proved to be adequate to replace the oil based styrene in commercial reference SB latexes. Even though the emulsion polymerisation for the α-methylstyrene–butadiene latex was not optimised, almost all tested properties were at least equally good as in the commercial reference sample. α-Methylstyrene containing coating colours had slightly higher viscosity than the other coating colours. Coating colours containing α-methylstyrene seems to have an improved water retention compared to the commercial reference styrene–butadiene latex coating colour and the laboratory prepared styrene–butadiene coating colour. The paper coated with the commercial reference latex containing coating colour was less porous than the other coated papers. Despite of that, both dry and wet surface strength were at least equally good as in the case of the commercial reference latex. The results are promising when thinking of the future development of the bio-based latexes. 相似文献
9.
The results of the present investigation reveal that 2-methyltetrahydrofuran is a potential solvent for the extraction of levulinic acid from dilute aqueous solution. This conclusion is based on the relatively high values of distribution coefficient Kd (1.3-1.6) measured for the system of levulinic acid – water – 2-methyltetrahydrofuran at temperatures 298.2 K, 313.2 K, and 328.2 K, as well as encouraging performance of the continuous counter current Kühni column. The results give reason to believe, that 2-methyltetrahydrofuran can be considered for the extraction of other low molecular weight acids, such as formic or lactic acid, as well. 相似文献
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