Curable urethane composition
AssigneesItoh Seiyu Kabushiki Kaisha, Sanyu Resin Kabushiki Kaisha
InventorsSusumu Kusakawa, Yoshiyuki Itoh, Seiichi Morooka, Kenji Komazawa, Kenji Ueda
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Abstract
A new curable urethane composition which comprises a polyhydroxyl component and a polyisocyanate component, wherein said polyhydroxyl component comprises 80 to 10% by weight of an interesterification product (A) which is the reaction product of castor oil (a1) and substantially non-hydroxyl-containing naturally occurring triglyceride oil (a2) and, optionally, low molecular weight polyol (a3) and 20 to 90% by weight of a polybutadiene based polyol (B). The composition has a sufficiently low viscosity to be easily handled and forms a polyurethane resin with excellent elongation and electrical properties.
Claims9
A new curable urethane composition which comprises a polyhydroxyl component and a polyisocyanate component, the equivalent ratio of said polyisocyanate component to said polyhydroxyl component being 0.8 to 1.4, wherein said polyhydroxyl component comprises
- 80 to 10% by weight of an interesterification product (A) which is the reaction product of 90 to 20% by weight of castor oil (a1), 10 to 80% by weight of substantially non-hydroxyl-containing naturally occurring triglyceride oil (a2) and 0 to 20% by weight of low molecular weight polyol (a3) based on the reaction product and
- 20 to 90% by weight of a polybutadiene based polyol (B).
Dependencies are inferred from the claim text.