Radical polymerization initiator andd process for its preparation
AssigneeNippon Zeon Co., Ltd.
InventorsSouichi Suzuki, Hiroshi Horino, Tetsu Ohishi
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Abstract
A radical polymerization initiator comprising as an active ingredient a hydroperoxide of disproportionated or hydrogenated rosin acid or its alkali metal or ammonium salt. The initiator is prepared by contacting disproportionated or hydrogenated rosin acid or its alkali metal or ammonium salt with molecular oxygen in water or an organic solvent at a temperature of 0.degree. to 150.degree.C. to form its hydroperoxide.
Claims9
A radical emulsion-, suspension-, or aqueous-polymerization initiator consisting essentially of as an active ingredient a hydroperoxide of disproportionated rosin acid, alkali metal salt thereof, ammonium salt thereof, hydrogenated rosin acid, alkali metal salt thereof, or ammonium salt thereof, said active ingredient being prepared by contacting disproportionated rosin acid, alkali metal salt thereof, ammonium salt thereof, hydrogenated rosin acid, alkali metal salt thereof, or ammonium salt thereof with molecular oxygen in water or an organic solvent in the presence of a radical reaction initiator at a temperature of 0.degree. to 150.degree.C. and a pressure of 0 to 100 kg/cm.sup.2.G to form the hydroperoxide thereof.
A process for preparing a radical emulsion-, suspension-, or aqueous-polymerization initiator consisting essentially of, as an active ingredient, a hydroperoxide of a member selected from the group consisting of disproportionated rosin acid, alkali metal salt thereof, ammonium salt thereof, hydrogenated rosin acid, alkali metal salt thereof, and ammonium salt thereof, which process comprises contacting said member with molecular oxygen in water or an organic solvent in the presence of a radical reaction initiator at a temperature of 5.degree. to 150.degree.C. and a pressure of 0 to 100 Kg/cm.sup.2.G to form the hydroperoxide thereof.
Dependencies are inferred from the claim text.