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R&D Reports

vol. 1994 - I (1994.5.30 issue)

Zinc oxide flake -LUXELEN FZT-

New inorganic filler with flaky shape has been developed. The flake is made of zinc oxide. The flake has not only superior ultraviolet screening performance, but also excellent sensory powder properties due to its flaky shape. Mechanism for ultraviolet screening, preparation, properties and application for makeup cosmetics was illustrated.
( by Kazuo Yamamoto, Masaji Harakawa, Hideo Fujii, Hidekimi Kadokura )

High performance processing stabilizer -Sumilizer® GS-

Sumilizer® GS, (2-(1-(2-hydroxy-3,5-di-tert-pentylphenyl) ethyl )-4,6- di-tert-pentylphenyl acrylate), is an effective processing stabilizer which protects polymer against thermal degradation caused by heat or mechanical stress especially under oxygen-deficient atmosphere. GS shows also high resistance to oxidative discoloration. GS was designed based on the results of the studies on the influences of structural factors of related phenols on oxidative discoloration and processing stability of polymers.
( by Kanako Fukuda, Kikumitsu Inoue, Tetsuo Yamaguchi, Manji Sasaki, Shin-ichi Yachigo )

Fluidized bed technology in gas phase polymerization

The design of fluidized bed reactor is a key technology to develop Linear Low Density Polyethylene (LLDPE) gas phase process. This paper describes a experimental study on fluidized bed reactor. In addition, various processes for LLDPE production are briefly described.
( by Kohzoh Miyazaki, Masashi Hamba, Hikaru Nagashima, Tsutomu Konaka )

The Epitaxial Growth of Compound Semiconductors Using MOCVD

The applications of compound semiconductors, which have been expected as the semiconductor of next generation, are increasing rapidly while the semiconductor industry is keeping growing. The hetero-epitaxial substrate of compound semiconductors is an extremely important product for highly functional semiconductor devices. MOCVD (Metal-organic Chemical Vapor Deposition) is one of the most flexible epitaxial growth techniques applicable for wide variety of materials. It has also excellent productivity and controllability in the growth of sophisticated epitaxial layers. The problems on the quality of epitaxial layers grown by MOCVD are discussed and some applications are shown in this paper.
( by Masahiko Hata, Noboru Fukuhara, Yoshinobu Matsuda, Takayoshi Maeda )

Development of TFA computer systems through downsizing technologies

Since the second half of 1980's, we have been pursuing company-wide, TFA (Total Factory Automation) projects, which include computerized factory management systems. In the past few years, we have faced an extremely rapid progress in computer technologies, especially the DOWNSIZING orientation from mainframes to smaller sizes. This paper describes the way we have been developing the TFA computer systems under these circumstances, through adopting WORKSTATIONS and RDBMS/4GL, developing a TFA elemental module software and constructing a NETWORK.
( by Osamu Imai )

Common language at a chemical plant

To achieve innovation in a chemical plant operation technology, new and better information and document tools are necessary. Computer, database, network, graphical user interface and the like are strong tools to realize such tools. Engineers can get all of data, trough R & D up to plant operation with maintenance, using common language and integrated database. At a chemical plant, flowsheet has been a common language, Some applications using flowsheet and flowchart are introduced in this paper.
( by Hiroshi Nishikawa, Tsuyoshi Kayanoki )

Organic Synthesis Design by Computer Programs - A Coming of Age of the Work Sharing of Synthetic Research between Human Beings andComputers -

30 years have passed since the basic idea of using computers for organic synthesis design was presented. We review the history of the realization of this basic idea in the form of concrete computer programs and the subsequent development of these programs. The experience of cooperation between universities and private companies in some of these efforts is also described. Finally we give our views on the use of such programs by chemists: a program is suitable for producing proposed routes based on known reactions and chemists will create new kinds of catalysts and synthetic methodologies.
( by Tetsuhiko Takabatake, Toshio Takemura, Iwao Dohgane, Takeshi Kikuchi )

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