PRODUCTION METHOD OF ISOCYANATE GROUP-CONTAINING ALKOXYSILANE

To provide a production method of an isocyanate group-containing alkoxysilane, with which the isocyanate group-containing alkoxysilane with high purity can be efficiently obtained.SOLUTION: An amino group-containing alkoxysilane and a dialkyl carbonate are made to react with each other and a mixture...

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Hauptverfasser:	TAKAMATSU KOJI, YOSHIDA TSUTOMU, SEKI TAMAMI, MIYAJIMA ATSUHIRO
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAININGELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN,SULFUR, SELENIUM OR TELLURIUM CHEMISTRY METALLURGY ORGANIC CHEMISTRY
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Beschreibung
Zusammenfassung:	To provide a production method of an isocyanate group-containing alkoxysilane, with which the isocyanate group-containing alkoxysilane with high purity can be efficiently obtained.SOLUTION: An amino group-containing alkoxysilane and a dialkyl carbonate are made to react with each other and a mixture including a carbamate and an alcohol is obtained. Next, the mixture is heated so as to obtain an isocyanate group-containing alkoxysilane. At this time, a first fraction containing the alcohol, a second fraction containing the isocyanate group-containing alkoxysilane, and a third fraction containing a cyclic by-product are obtained, and by mixing the third fraction with the mixture before heating, the cyclic by-product is made to react with the alcohol so as to return the cyclic by-product to the carbamate.SELECTED DRAWING: Figure 1 【課題】高純度のイソシアネート基含有アルコキシシランを効率よく得ることができるイソシアネート基含有アルコキシシランの製造方法を提供する。【解決手段】アミノ基含有アルコキシシランとジアルキルカーボネートとを反応させて、カルバメートとアルコールとを含む混合物を得る。次に、混合物を加熱してイソシアネート基含有アルコキシシランを得る。このとき、アルコールを含有する第１の留分と、イソシアネート基含有アルコキシシランを含有する第２の留分と、環状副生成物を含む第３の留分とを得る。そして、第３の留分を加熱前の混合物に混合することにより、環状副生成物にアルコールを反応させて、環状副生成物をカルバメートに戻す。【選択図】図１