METHOD FOR PRODUCING POLYISOCYANATE COMPOSITION

PROBLEM TO BE SOLVED: To provide a method for producing a polyisocyanate composition excellent in drying property, hardness and stress at yield point.SOLUTION: The method for producing a polyisocyanate composition comprises: a first step of subjecting a polyisocyanate precursor produced from at leas...

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Bibliographische Detailangaben
Hauptverfasser:	TSUJITA JUNYA, TAKENO KAZUTAKA
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	CHEMISTRY COMPOSITIONS BASED THEREON MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a method for producing a polyisocyanate composition excellent in drying property, hardness and stress at yield point.SOLUTION: The method for producing a polyisocyanate composition comprises: a first step of subjecting a polyisocyanate precursor produced from at least one kind of diisocyanate selected from the group consisting of an aliphatic diisocyanate and an alicyclic diisocyanate and a polycarbonate diol produced by polymerizing at least one kind of diol selected from the group consisting of 2-20C diols and a carbonate compound to urethanization reaction; and a second step of subjecting a urethane group in the resultant reaction product to allophanatization reaction.SELECTED DRAWING: None 【課題】乾燥性、硬度及び降伏点応力に優れる、ポリイソシアネート組成物の製造方法の提供。【解決手段】脂肪族ジイソシアネート及び脂環族ジイソシアネートからなる群より選ばれる少なくとも１種のジイソシアネートから得られるポリイソシアネート前駆体と、炭素数２〜２０のジオールからなる群より選ばれる少なくとも１種のジオール及びカーボネート化合物を重合したポリカーボネートジオールと、をウレタン化反応させる第一の工程と、得られた反応生成物中のウレタン基をアロファネート化反応させる第二の工程と、を有するポリイソシアネート組成物の製造方法。【選択図】なし