Specific examples of hydroxy functional compounds useful as capping agents, include, but are not limited to: lower aliphatic alcohols such as methanol, ethanol, and n-butanol; cycloaliphaticalcohols such as cyclohexanol and tetrahydrofuran; aromatic-alkyl alcohols, such as phenyl carbinol and methylphenyl carbinol; and glycol ethers, e.g., ethylene glycol butyl ether, diethylene glycol butyl ether