摘要:
A polybutadiene having a hydroxyl group at a terminal end thereof is reacted with a lactone compound such as an µ-caprolactone to obtain a polymer polyol represented by formula (I): HO-X 1 -Y-X 2 -OH (wherein X 1 and X 2 each independently represents a polyester component and Y represents a polybutadiene component), the polymer polyol is reacted with an unsymmetric diisocyanate to obtain a urethane prepolymer, and then the urethane prepolymer is reacted with a chain extender to obtain a polyurethane.
摘要:
Provided is a method for producing a hydrogenated unsaturated polyhydroxyhydrocarbon polymer capable of suppressing side reactions such as a hydrogenolysis reaction of a terminal hydroxyl group and achieving a high hydrogenation rate in a short reaction time. A hydrogenated unsaturated polyhydroxyhydrocarbon polymer is obtained by a method including: hydrogenating an unsaturated polyhydroxyhydrocarbon polymer under the presence of a hydrogenation catalyst and a reaction solvent in the following two stages (I) and (II): (I) carrying out a hydrogenation reaction in a temperature range of 80°C to 130°C until a hydrogenation rate of at least 30 mol% is achieved; and then (II) carrying out a hydrogenation reaction at a temperature higher than 130°C until a hydrogenation rate of at least 98 mol% is achieved.
摘要:
The present invention provides a polyol composition comprising a polyol having a polyester chain, wherein the polyol composition substantially contains no metal-base polymerization catalyst and an amount of phosphorus element derived from a polymerization catalyst is 1 to 1000 ppm. Furthermore, the present invention provides a method for producing a polyol composition comprising reacting a compound having an active hydrogen with a compound having at least one selected from the group consisting of carboxyl group, ester group and acid halide group in the presence of 0.0001-0.05 parts by mol of a phosphorus compound with respect to 1 part by mol of the active hydrogen without using a metal-based polymerization catalyst.
摘要:
A polybutadiene having a hydroxyl group at a terminal end thereof is reacted with a lactone compound such as an ε-caprolactone to obtain a polymer polyol represented by formula (I): HO-X 1 -Y-X 2 -OH (wherein X 1 and X 2 each independently represents a polyester component and Y represents a polybutadiene component), the polymer polyol is reacted with an unsymmetric diisocyanate to obtain a urethane prepolymer, and then the urethane prepolymer is reacted with a chain extender to obtain a polyurethane.