In this paper the preparation of the/3-methallyl ethers of sucrose, D-mannitol, D-sorbitol, pentaerythritol, dxpentaerythritol, glycerol and ethylene glycol is described, their oxidation and polymerization a. re discussed, and comparisons are made with the corresponding allyl ethers. For the sake of comparison allyl dipentaerythritol, not described in previous articles, has been prepared.