. "However, other alpha-monolefins may be used including those of the formula CH2 ???CHR where R is an alkyl radical having for example 1 to 12 carbon atoms (e.g., butene-1, pentene-1, hexene-1, 4-methyl-pentene-1, 5-methylhexene-1, 4-ethylhexene-1, etc.)." . . .