URETHANE PREPOLYMER, POLYURETHANE AND SEALING MATERIAL USING THE SAME

• Main Authors: OTANI YASUHO, OHAMA TOSHIO, SUZUKI MAYUKA
• Format: Patent
• Language: English; Japanese
• Published: 04.06.2020
• Subjects: ADHESIVES; CHEMISTRY; COMPOSITIONS BASED THEREON; DYES; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; POLISHES; THEIR PREPARATION OR CHEMICAL WORKING-UP

To provide a polyurethane that has a low tackiness property and is high strength and high transparency.SOLUTION: Provided is a NCO-terminated liquid urethane prepolymer represented by formula (1), containing a structural unit having a number average molecular weight of 200 or more and 3,000 or less, in which the degree of unsaturation is 0.020 meq/g or less, and the terminal is a NCO group. In formula (1), Q represents a polymer component containing a halogenated oxypropylene group, m represents an integer of 2 to 8, and Rrepresents an active hydrogen-containing compound residue.SELECTED DRAWING: None 【課題】低タック性で高強度、高透明なポリウレタンの提供。【解決手段】式（１）で示されるＮＣＯ末端の液状ウレタンプレポリマーであり、数平均分子量が２００以上３，０００以下の構造単位を含み、不飽和度が、０．０２０ｍｅｑ／ｇ以下であり、末端がＮＣＯ基である液状ウレタンプレポリマー：式（１）中、Ｑは、ハロゲン化オキシプロピレン基を含む重合体成分を表し、ｍは、２〜８の整数を表し、Ｒ１は、活性水素含有化合物残基を表す。【選択図】なし