Polyurethane resin
AssigneeDaicel Corporation
InventorsTakeru KAMADA, Shinnosuke TAKAOKA
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Abstract
Provided is a resin excellent in flexibility and fatigue resistance and less likely to harden in a low temperature region. A polyurethane resin of the present disclosure contains: a constituent unit derived from a urethane prepolymer containing an aromatic diisocyanate and a diol compound as constituent units; and a structural portion derived from a curing agent, wherein the urethane prepolymer has a k value of less than 5.00, the diol compound includes polytetramethylene ether glycol and polycaprolactone diol and/or includes a copolymer of polytetramethylene ether glycol and caprolactone diol, and a molar ratio [polytetramethylene ether glycol/polycaprolactone] of a polytetramethylene ether glycol unit to a polycaprolactone unit in the urethane prepolymer is 3/7 or more.
Claims9
A polyurethane resin comprising:
- a constituent unit derived from a urethane prepolymer containing an aromatic diisocyanate and a diol compound as constituent units;
- and
- a structural portion derived from a curing agent, wherein
- the urethane prepolymer has a k value of less than 5.00,
- the diol compound includes polytetramethylene ether glycol and polycaprolactone diol and/or includes a copolymer of polytetramethylene ether glycol and caprolactone diol, and
- a molar ratio [polytetramethylene ether glycol/polycaprolactone] of polytetramethylene ether glycol units to polycaprolactone units in the urethane prepolymer is 3/7 or more.
Dependencies are inferred from the claim text.