POLYISOCYANATE COMPOSITION

• Main Authors: TAKAMATSU KOJI, SAKAMOTO HIROYUKI, MASUI MASAKAZU, YAGI TORU
• Format: Patent
• Language: English; Japanese
• Published: 07.10.2021
• Subjects: 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

To provide a polyisocyanate composition that has excellent reaction stability (turbidity resistance, discoloration resistance) and also has excellent handleability (low viscosity).SOLUTION: In a polyisocyanate composition containing a reaction product of pentamethylene diisocyanate and a biuret modifier, the polyisocyanate composition contains 2 molecule pentamethylene diisocyanate, contains urea group-containing dimer containing 1 urea group, and the content ratio of the urea group-containing dimer (urea group-containing dimer content) is 1 mass% or more and 10 mass% or less for the total amount of the polyisocyanate composition.SELECTED DRAWING: None 【課題】反応安定性（耐濁性、耐変色性）に優れ、かつ、取扱性（低粘度性）にも優れるポリイソシアネート組成物を提供する。【解決手段】ペンタメチレンジイソシアネートとビウレット変性剤との反応生成物を含むポリイソシアネート組成物において、ポリイソシアネート組成物は、２分子のペンタメチレンジイソシアネートを含有し、１つの尿素基を含有する尿素基含有２量体を含み、尿素基含有２量体の含有割合（尿素基含有２量体含有率）が、ポリイソシアネート組成物の総量に対して、１質量％以上１０質量％以下である。【選択図】なし