AMBIENT TEMPERATURE CURABLE ISOCYANATE-FREE COMPOSITIONS FOR PREPARING CROSSLINKED POLYURETHANES

• Main Authors: JEFF R ANDERSON, NAHRAIN E KAMBER, JOHN N ARGYROPOULOS, REBECCA S ORTIZ
• Format: Patent
• Language: English; Japanese
• Published: 17.11.2016
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS

PROBLEM TO BE SOLVED: To provide crosslinked polyurethane compositions that are isocyanate-free, shelf-stable and useful and comprise a polycarbamate as a first component having a filler, pigment, extender or matting agent and a second component containing an acidic catalyst, an alkanol having one OH group, a polyaldehyde and an acetal or hemiacetal of the polyaldehyde.SOLUTION: Such a two component composition contains 0.01 to 10 wt.% of one or more catalysts having a pKa of less than 5.0, based on the total weight of solids in the composition, such that the first and second components when combined form a composition that reacts to cure at a temperature from 0°C to less than 80°C to form a crosslinked polyurethane.SELECTED DRAWING: None 【課題】イソシアネートを含まず、充填剤、顔料、増量剤、または艶消し剤を有する第１の成分としてのポリカルバメートと、酸性触媒、１つのＯＨ基を有するアルカノール、ポリアルデヒド、及び該ポリアルデヒドのアセタールまたはヘミアセタールを含有する第２の成分とからなる貯蔵安定的かつ有用な架橋ポリウレタン組成物を提供する。【解決手段】前記組成物中の固形分の総重量に基づいて、０．０１〜１０重量％の５．０未満のｐＫａを有する１つ以上の触媒とを、前記第１及び第２の成分が、組み合わせられたときに、反応して０℃〜８０℃未満の温度で硬化して架橋ポリウレタンを形成する組成物を形成するように、含む、前記二成分組成物。【選択図】なし