ブックタイトル高分子　POLYMERS　62巻12月号

概要

高分子　POLYMERS　62巻12月号

Digest for English ReadersVisible Light Active Photocatalysts [V-CAT?] 733Yoshio KIMURAToyota Tsusho CorporationAdviseryoshio_kimura@toyota-tsusho.comwww.toyota-tsusho.com/Takeshi OHWAKIDoctor of EngineeringTOYOTA CENTRAL R&D LABS., INC.Research Managerohwaki@mosk.tytlabs.co.jpwww.tytlabs.co.jp/Toyota Central R&D Labs., Inc. has designed anddeveloped novel photocatalysts active under visiblelight illumination based upon a new concept of aniondoping such as nitrogen ions into substitutional sites oftitanium dioxides (TiO 2-xN x). Furthermore, TCRDL hasimproved photocatalytic activities of the photocatalysts bysupporting transition metal compounds on TiO 2-xN x anddeveloped various key technologies such as size controlof the powders and dispersion for practical applications.Toyota Tsusho Corporation has commercializedsuccessfully the visible light active photocatalysts underthe brand name of“V-CAT”. Many companies, ToyotaTsusho Co. and TCRDL have cooperatively developednew functional products. Presently, V-CAT photocatalystshave been widely used for applications in fibers and filmsfor deodorants, antibacterial, antifouling and neutralizingVOCs harmful to human health etc. The applications madeavailable with the appearance of the visible light activephotocatalysts will be expanded dramatically for use inwelfare and living environments.Keywords: Visible Light Photocatalyst / Fiber / Film /Environmental PurificationNovel Thermal Expansion Fire-Proofing Material 735and its ApplicationNorio NUMATASekisui Chemical Co., Ltd. R&D InstituteMultifunctional Materials Development CenterGeneral Managernumata002@sekisui.comwww.sekisui.co.jp/We have developed a new thermal expansion fire-proofingmaterial.It is a thin sheet that has a thickness of 0.5-2 mm,consisting of thermal expansive graphite and several kindsof fire retardant. If exposed to fire, it will expand in aninstant and a rigid expansion layer will be formed in hightemperature (>200℃). Significant fire-resistant performanceis demonstrated by the high insulation property of thisexpansion. The data of this material expanding 10 timesand 30 times are shown; the expansion property is freelycontrollable by its composition ratio. Moreover, since thesheet itself has a pressure sensitive adhesive property, it iseasy to laminate it with other materials. Furthermore, youcan bend and cut it easily, since it is a flexible sheet or atape-shape.This material is applied as the fire-resistant steel framecovering, and wall/floor penetration seal material.Keywords: Thermal Expansion / Fire-Proofing /Intumescent Material / Fi-Block / Adhesive TapeDevelopment of Novel Cyclic Carbodiimide 737Shinichiro SHOJITeijin LimitedResearchersh.shouji@teijin.co.jpwww.teijin.com/Carbodiimides have been widely used as adehydrogenative condensation or cross-linking agent.Recently, they have been commercialized as an endcappingagent for polymer, especially polyesters. However,the conventional carbodiimides can generate harmfulisocyanate gas in an extrusion compounding process forthe end capping of polyesters. Therefore, it worsens workenvironment. This environmental issue was our firstmotivation to develop new carbodiimides.We have succeeded to invent the innovative moleculardesign concept and to develop novel cyclic carbodiimidesthat do not generate gases. In the process of development,we have found that the specific cyclic carbodiimides donot generate harmful isocyanate gas in the process ofend-capping, because the isocyanate is immobilized atthe end of the polymer chain. Moreover, the designedcyclic carbodiimides show much higher performanceto the hydrolysis resistance of polylactic acid than theconventional ones.Furthermore, we have succeeded to establish the massproductiontechnology of our cyclic carbodiimides.We are confident that we can provide solutions for ourcustomers using the cyclic carbodiimides.Keywords: Carbodiimide / Isocyanate / Gas / Polyester /Hydrolysis / Polyester / Cyclic StructurePolyMANGA 739高分子62巻12月号（2013年）c2013 The Society of Polymer Science, Japan723