METHOD FOR PRODUCING POLYISOCYANURATE-MODIFIED ISOCYANATE COMPOSITION

PROBLEM TO BE SOLVED: To provide a method for producing a poly isocyanurate-modified isocyanate composition capable of measuring an acidity at once.SOLUTION: The method for producing a poly isocyanurate-modified isocyanate composition includes the steps of: reacting aliphatic and/or alicyclic diisoc...

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1. Verfasser: HIGASHIKUBO ICHIRO
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Sprache:eng ; jpn
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Zusammenfassung:PROBLEM TO BE SOLVED: To provide a method for producing a poly isocyanurate-modified isocyanate composition capable of measuring an acidity at once.SOLUTION: The method for producing a poly isocyanurate-modified isocyanate composition includes the steps of: reacting aliphatic and/or alicyclic diisocyanate with a hydroxyl group-containing compound; thereafter isocyanurating by an isocyanuration catalyst in the presence of an acid-base indicator; and detecting an acidity according to a color change extent by the acid-base indicator, whereby an acidity after reaction can be detected at once by the color change extent thereof, it is easy to adjust an isocyanuration catalyst amount to be added, the reaction is easily controlled, and further a reaction time is shortened.SELECTED DRAWING: None 【課題】酸性度が即時に測定できるポリイソシアヌレート変性イソシアネート組成物の製造方法を提供する。【解決手段】脂肪族および/または脂環族ジイソシアネート、水酸基含有化合物を反応させた後、酸塩基指示薬存在下、イソシアヌレート化触媒によりイソシアヌレート化し、酸塩基指示薬による反応液の変色度合いにより酸性度を確認する工程を含むポリイソシアヌレート変性イソシアネート組成物の製造方法において、反応液の酸性度をその変色度合いにより即時に判定でき、イソシアヌレート化触媒投入量の調節が容易になり、反応を制御しやすく、さらに反応時間を短縮する方法。【選択図】なし