BIOMASS RESOURCE-ORIGINATED POLYURETHANE AND PRODUCTION METHOD THEREOF

• Main Authors: ITO HIROYUKI, SUGAI NAOKI, MATSUMOTO TAKANAO, AOSHIMA NORIYUKI, OHARA TERUHIKO, SUZUKI NAOKI, NAKAJIMA YASUKO
• Format: Patent
• Language: English; Japanese
• Published: 21.05.2015
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR; LAUNDERING; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; TEXTILES; THEIR PREPARATION OR CHEMICAL WORKING-UP; TREATMENT OF TEXTILES OR THE LIKE; WALL, FLOOR OR LIKE COVERING MATERIALS, e.g. LINOLEUM,OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF AFIBROUS WEB COATED WITH A LAYER OF MACROMOLECULARMATERIAL

PROBLEM TO BE SOLVED: To provide a new polyester polyol which is friendly to the global environment while keeping heat, weather and water resistances, characteristics of polyurethanes originated from polyester polyols, has easy controllability of the polyurethane reaction and provides a polyurethane excellent in elongation and elastic modulus and a polyurethane using the polyester polyol.SOLUTION: A method of producing a polyurethane includes a step of reacting a dicarboxylic acid with an aliphatic diol to produce a polyester polyol and a step of reacting the polyester polyol with a polyisocyanate compound. The dicarboxylic acid contains at least one ingredient derived from a biomass resource; the content of an organic acid in the dicarboxylic acid is higher than 0 ppm and 1,000 ppm or lower; and the pKa value of the organic acid at 25°C is 3.7 or smaller. 【課題】ポリエステルポリオール由来のポリウレタンとしての特性である耐熱、耐候性、耐水性を維持したまま、地球環境に優しく、ポリウレタン反応の制御がし易く、更にポリウレタンの伸度や弾性率の優れたポリウレタンを得るための新たなポリエステルポリオール、およびこのポリエステルポリオールを用いたポリウレタンを提供する。【解決手段】本発明は、ジカルボン酸および脂肪族ジオールを反応させポリエステルポリオールを製造する工程と、該ポリエステルポリオールおよびポリイソシアネート化合物を反応させる工程とを少なくとも含むポリウレタンの製造方法であって、該ジカルボン酸がバイオマス資源から誘導された少なくとも一つの成分を含み、該ジカルボン酸中の有機酸の含有量が０ｐｐｍ超１０００ｐｐｍ以下であり、該有機酸の２５℃におけるｐＫａ値が３．７以下であることを特徴とする製造方法。【選択図】 なし