| 摘要 |
PROBLEM TO BE SOLVED: To obtain a catalyst that imparts transparency to polyurethanes, the polyurethanes for which the catalyst is used and which have good transparency that is characterized by low deterioration per day, and to provide a method for producing such polyurethanes. SOLUTION: This catalyst for producing polyurethanes contains 1 or more kinds of substances selected from the group consisting of triethylenediamine, 1,8-diazabicyclo[5.4.0]undecene-7,1,5-diazabicyclo[4.3.0]nonene-5, and their salts. The method for producing the polyurethanes comprises reacting a polyisocyanate component with a polyol component in the presence of the catalyst for producing polyurethanes. The polyurethane is obtained by reacting the polyisocyanate component with the polyol component in the presence of the above catalyst for producing polyurethanes. COPYRIGHT: (C)2005,JPO&NCIPI
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