METHOD FOR PRODUCING ALKOXYSILANE GROUP-CONTAINING ISOCYANATE

• Main Authors: KOHLSTRUK STEPHAN DR, SPYROU EMMANOUIL DR, DIRK HOPPE, KRECZINSKI MANFRED
• Format: Patent
• Language: English; Japanese
• Published: 10.10.2019
• Subjects: ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAININGELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN,SULFUR, SELENIUM OR TELLURIUM; CHEMISTRY; METALLURGY; ORGANIC CHEMISTRY

To provide a method for producing alkoxysilane group-containing isocyanate, that is excellent in yield and production cost.SOLUTION: Provided is a process for producing an alkoxysilane group-containing isocyanate, including the following steps A) to D): A) a step of reacting an alkoxysilano(cyclo)alkylamine with a dialkyl carbonate in the presence of a basic catalyst to produce an alkoxysilano(cyclo)alkylurethane, in which the basic catalyst is a guanidine base, B) a step of simultaneously or sequentially performing separation or removal and/or deactivation of the catalyst, and removal of low-boilers, solids, salt-loaded substances and/or high-boilers, C) a step of thermally dissociating the alkoxysilano(cyclo)alkylurethane obtained after B) to release an alkoxysilane group-containing isocyanate and a by-product, and to make the bottom material reside, D) a step of separating the alkoxysilane group-containing isocyanate and the by-product, separating them from the bottom material, and recovering them.SELECTED DRAWING: None 【課題】収率及び製造コストに優れたアルコキシシラン基含有イソシアネートの製造方法の提供。【解決手段】以下の工程Ａ）〜Ｄ）を有するアルコキシシラン基含有イソシアネートの製造方法。Ａ）アルコキシシラノ（シクロ）アルキルアミンを塩基性触媒の存在下にジアルキルカーボネートと反応させて、アルコキシシラノ（シクロ）アルキルウレタンを生成させる工程、ここで塩基性触媒はグアニジン塩基である、Ｂ）前記触媒の分離除去かつ／又は失活、並びに低沸点物、固形物、塩負荷物及び／又は高沸点物の除去、を同時に又は順に行う工程、Ｃ）Ｂ）の後に得られたアルコキシシラノ（シクロ）アルキルウレタンを熱解離させて、アルコキシシラン基含有イソシアネート及び副生成物を遊離させるとともに、底部材料が残留する工程、Ｄ）アルコキシシラン基含有イソシアネート及び副生成物を分離させ、前記底部材料から分離して、これを回収する工程。【選択図】なし