| 摘要 |
<p>CANADIAN PATENT APPLICATION OF EUGENE YUE CHIEH CHANG AND ROBERT SAXON FOR POLYMERIC REACTION PRODUCTS OF THIODIETHANOL AND DIPHENOLS A vulcanizable elastomer composition is provided which comprises a copolymer represented by the formula: H ? OG ? x OH wherein ? OG ? comprises randomly alternating structural units (I), (II), and optionally (III) ? OC2H4SC2H4 ? (I) ? OR ? (II) ? OR? (III) wherein R represents the residue remaining on removal of two phenolic hydroxyl groups from a diphenolic compound and R' represents the residue remaining on removal of two hydroxyl groups from an aliphatic diol; said copolymer characterized in that the ratio of structural units (I) to structural units (II), or optionally, to the total of structural units (II) and (III), is not less than 1:1, and further characterized in that up to about 10 mole percent, based on total number of structural units OG of structural units (III), when present in said copolymer, contain external unsaturation having an allylic hydron atom; and x is an integer sufficient to provide a molecular weight of at least about 8000.</p> |
