US PATENT SUBCLASS 526 / 74
.~.~ Utilizing material during polymerization to prevent or remove reactor buildup, e.g., fouling, clogging, etc.

Current as of: June, 1999
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526 /   HD   SYNTHETIC RESINS OR NATURAL RUBBERS -- PART OF THE CLASS 520 SERIES

*  DD  SYNTHETIC RESINS (Class 520, Subclass 1) {8}
72  DF  .~ POLYMERS FROM ONLY ETHYLENIC MONOMERS OR PROCESSES OF POLYMERIZING, POLYMERIZABLE COMPOSITIONS CONTAINING ONLY ETHYLENIC MONOMERS AS REACTANTS OR PROCESSES OF PREPARING {43}
74.~.~ Utilizing material during polymerization to prevent or remove reactor buildup, e.g., fouling, clogging, etc.

DEFINITION

Classification: 526/74

(under subclass 72) Subject matter wherein material that would normally form during a polymerization reaction and which would clog or foul the polymerization equipment is removed from or is prevented or inhibited from forming by the use of a nonpolymerizable material, which material is other than a hydrocarbon or halogenated hydrocarbon used in solvent or diluent amount.

(1) Note. Included herein but not limited to the specific examples are patents which specifically claim the use of materials to remove or inhibit forming of fouling materials by solvents, surfactant surface treatments during polymerization, or maintaining a fluid film between the polymerization equipment and the polymerizing materials.

SEE OR SEARCH THIS CLASS, SUBCLASS:

62, for a process of polymerizing in reactor or defined material or in reactor which has been treated prior to polymerization therein.

89+, for processes of polymerizing in a specific diluent or solvent wherein reaction buildup is alleviated by the inherent use of a solvating material; and for processes of polymerizing in a hydrocarbon or halogenated hydrocarbon diluent together with a specific material wherein the hydrocarbon or halogenated hydrocarbon may prevent fouling of the reactor.

239, through 352.2, appropriate product for processes of polymerizing in a hydrocarbon or chlorinated hydrocarbon diluent or solvent.

SEE OR SEARCH CLASS 528, Synthetic Resins or Natural Rubbers,

484, for processes of removing buildup on reactor or processing equipment subsequent to polymerization.