Polyurethane composition for the manufacture of floors, especially for marine applications

Abstract

A polyurethane composition comprising: a) a polyol component including: at least one reaction product of castor oil with ketone resins having an OH number of 110 to 200 mg KOH/g; and at least one aliphatic triol, and b) an polyisocyanate component including: at least one polyisocyanate resin based on hexamethylene diisocyanate comprising one or more polyisocyanate prepolymers derived from the uretdione, the biuret or the isocyanurate of hexamethylene diisocyanate (HDI) blended with a member of the group consisting of the uretdione, the biuret or the isocyanurate of HDI, wherein weight ratio of the polyol o the polyol is in the range of 1.25-2.5. The invention provides curable flooring compositions that display good adhesion and proper mechanical performance, provide a Shore A hardness of 55-70, after curing, produce a nice appeal upon sanding cured composition and quickly regain the original form after load has been placed on the cured material.

Dependencies are inferred from the claim text.