Specifically, the particular comparative polyol mix, Example E, composed 56. 3 excess weight percent of the low-Tg copolymer associated with 20% methyl methacrylate, 15% styrene, 30% butyl acrylate, and 35% hydroxyethyl methacrylate. In Table VIII, the low-Tg copolymer used above within the polyol mix of Example 4, is referred to in Table III as Example Chemical, and the high-Tg copolymer used above within the polyol mix of Example 4, is referred in order to in Table VIII as Example Deb. Examples C and D were in comparison with the polyol blend of Example 7.