Polyisocyanate component, a polyurethane foaming system and an article made therefrom

A polyisocyanate component, comprising:

• (a) a preformed mixture including an aromatic oxazolidone compound that is the reaction product of
• (i) at least one epoxide compound having at least one aromatic group and
• (ii) at least one first polyisocyanate compound having an average isocyanate functionality of no more than 2.7 and greater than 1.8, in the presence of
• (iii) at least one catalyst, wherein the aromatic oxazolidone compound includes at least one free isocyanate group and at least one aromatic oxazolidone group, and wherein the aromatic oxazolidone group includes an aromatic group and an oxazolidone group;
• and
• (b) at least one second polyisocyanate compound having an average isocyanate functionality equal to or greater than 2.7 and less than 6.0, the second polyisocyanate compound being added to the preformed mixture and mixed with the aromatic oxazolidone compound to form the polyisocyanate component,
• wherein the polyisocyanate component has a viscosity of no more than 4.0 Pa-s at 25° C., wherein the content of the aromatic oxazolidone group in the polyisocyanate component is from 2 weight percent to 10 weight percent based on a total weight of the polyisocyanate component, and wherein the polyisocyanate component has an average isocyanate functionality of from 1.8 to 6.0.