A polyol having the formula Si(O—R1—OH)m(O—R2)nR3. Each R1 is a divalent radical derived from diethylene glycol, triethylene glycol, dipropylene glycol, or tripropylene glycol, each R2 is an aliphatic group, and R3 is an alkyl group or aromatic group. The value m is 2 or 3 and n is 0 or 1. A process of making the above polyol by: providing a reactant having the formula Si(O—R2)3R3, and reacting the reactant with a diol having the formula HO—R1—OH. An antifouling coating comprising a thermoset formed by reacting a polyisocyanate with the above polyol. The coating is not a foam.
