Synonyms: Poly(oxy-1,2-ethanediyl), .alpha.-hydro-.omega.-(1-oxo-2-propenyl)oxy-, ether with 2,2-bis(hydroxymethyl)-1,3-propanediol (4:1);α-Hydro-ω-[(1-oxo-2-propenyl)oxy] poly(oxy-1,2-ethanediyl) ether with 2,2-bis(hydroxymethyl)-1,3-propanediol(4:1)