Patent ID: 8703898
Filing Date: 2014-04-22
Classification: C08G,C08L,C09D,C09J

Abstract:
1. A random copolymerized hyperbranched polyether polyol which is obtained by random copolymerization with a ring-opening reaction between a hydroxyalkyloxetane (a1) and a monofunctional epoxy compound (a2) in a molar ratio (a1)/(a2) of 1/1 to 1/3, wherein neither compound (a1) nor compound (2) has already ring-opened prior to mixing the hydroxyalkyloxetane (a1) and the monofunctional epoxy compound (a2); the hyperbranched polyether polyol has a number average molecular weight (Mn) of 1,000 to 3,500 and a hydroxyl value of 150 to 350 mg·KOH/g, and the hyperbranched polyether polyol includes a primary hydroxyl group (H1) and a secondary hydroxyl group (H2) in the molecular structure thereof, wherein the number of the secondary hydroxyl group (H2) in one molecule of the hyperbranched polyether polyol is in a ratio of 20 to 70% based on the total number of a hydroxyl group in the molecule; and the primary hydroxyl group (H1) and the secondary hydroxyl group (H2) result from the ring-opening reaction between the hydroxyalkyloxetane (a) and the monofunctional epoxy compound (a2).