Oxidation of halogenated polymers and anticaking halogenated polymers
AssigneeThe Dow Chemical Company
InventorsDonald W. Pennington, Joseph L. Allison
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Abstract
An oxidized halogenated polymer is prepared by a process comprising (a) forming an admixture of an acidic oxidizing agent and a suspension of a particulate halogenated polymer in a polar liquid; (b) heating the admixture to a temperature sufficient to initiate the reaction between the polymer and the oxidizing agent; and (c) continuing the reaction until an oxidized polymer having a preselected extent of oxidation is obtained. At least one addition polymerizable compound is, optionally, grafted to the oxidized halogenated polymer. The oxidized halogenated polymer and graft copolymers thereof have physical properties different from the halogenated polymer and graft copolymers thereof. Certain graft copolymers are non-caking or free flowing.
Claims47
A process of preparing a graft copolymer comprising steps of
- (a) forming an admixture of (1) an acidic oxidizing agent and (2) a suspension of a particulate halogenated polymer in a polar liquid;
- (b) heating the admixture to a temperature sufficient to initiate reaction between the polymer and the oxidizing agent;
- and
- (c) continuing the reaction until an oxidized polymer having a preselected extent of oxidation is obtained
- (d) grafting to the oxidized polymer at least one addition polymerizable compound.
An oxidized halogenated olefin polymer having carbonyl groups attached thereto prepared by a process comprising the steps of
- (a) forming an admixture of (1) an acidic oxidizing agent and (2) a suspension of a halogenated olefin polymer in a polar liquid;
- (b) heating the admixture to a temperature sufficient to initiate reaction between the polymer and the oxidizing agent;
- and
- (c) continuing the reaction until an oxidized polymer having a preselected extent of oxidation is obtained.
A graft copolymer prepared by a process comprising:
- (a) forming an admixture of (1) an acidic oxidizing agent and (2) a suspension of a particulate halogenated polymer in a polar liquid;
- (b) heating the admixture to a temperature sufficient to initiate reaction between the halogenated polymer and the oxidizing agent;
- (c) continuing the reaction until an oxidized halogenated polymer having a preselected extent of oxidation is obtained;
- and
- (d) grafting to the oxidized halogenated polymer at least one compound graftable thereto.
A composition comprising a blend of an oxidized halogenated polymer having carbonyl groups attached thereto and at least one other polymer compatible therewith.
Dependencies are inferred from the claim text.