Polyether diol and method for producing the same
AssigneeMitsubishi Gas Chemical Company, Inc.
InventorsAtsushi Okamoto, Hideyuki Sato, Yoshiaki Yamamoto
Life of this patent
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Abstract
A method for producing a polyether diol includes the step of subjecting a compound represented by the following general formula (1) to hydrogenation reduction in the presence of a hydrogenation catalyst to provide a specific polyether diol.
Claims18
A method for producing a polyether diol, comprising subjecting a compound represented by the following general formula (1) to hydrogenation reduction in the presence of a hydrogenation catalyst to provide at least one polyether diol selected from the group consisting of compounds represented by the following general formulae (2), (3A), (3B), (3C), and (3D):
- wherein in the formulae (1), (2), (3A), (3B), (3C), and (3D), R1, R2, R3, and R4 may be the same or different, and represent a linear or branched alkyl group having 1 to 6 carbon atoms;
- and in each of R1, R2, R3, and R4, independently, one or two or more hydrogen atoms contained in the alkyl group may be replaced with an alkoxy group having 6 or less carbon atoms or a functional group inactive for a hydrogenation reduction reaction.
A polyether diol represented by the following general formula (A):
- wherein in the formula (A), a combination of a group of R5 and R6 with a group of R7 and R8 is any one of (a1) to (a6) shown in the following table
- No.
- R5 and R6
- R7 and R8
- a1
- CH3 and CH3
- CH3 and C2H5
- a2
- CH3 and CH3
- CH3 and C3H7
- a3
- CH3 and CH3
- CH3 and C6H13
- a4
- CH3 and CH3
- C2H5 and C2H5
- a5
- CH3 and CH3
- C2H5 and C4H9
- a6
- CH3 and CH3
- C3H7 and C5H11.
A polyether diol represented by the following general formula (B1) or (B2):
- wherein in the formulae (B1) and (B2), R5, R6, R7, and R8 each independently represent a linear or branched alkyl group having 1 to 6 carbon atoms;
- in each of R5, R6, R7, and R8, independently, one or two or more hydrogen atoms contained in the alkyl group may be replaced with an alkoxy group having 6 or less carbon atoms or a functional group inactive for a hydrogenation reduction reaction;
- and at least one of R5 and R6 is a different group from at least one of R7 and R8.
Dependencies are inferred from the claim text.