C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
C08G 18/42 (2006.01) C08G 18/10 (2006.01) C08G 18/76 (2006.01) C08G 18/86 (2006.01) C08G 18/87 (2006.01) C08G 63/85 (2006.01) C08K 3/06 (2006.01) C08K 5/14 (2006.01) C08K 5/16 (2006.01) C08L 75/06 (2006.01)
Patent
CA 2191816
A method for producing a millable polyurethane, comprises the steps of: producing a poly-.epsilon.-caprolactone based diol represented by formula (I) Image wherein [] is a caprolactone unit; m and n are numbers of caprolactone units; and R1 is a divalent group derived from a polymerization initiator of formula R1(OH)2, the poly-.epsilon.- caprolactone based diol containing a controlled average number of caprolactone units and having a molecular weight distribution Mw/Mn of 1.0 to 1.5; and reacting the poly-.epsilon.- caprolactone based diol with a diisocyanate to produce a polyurethane with a restricted crystallizability having a rubber elasticity.
Daicel Chemical Industries Ltd.
Hokushin Corporation
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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