US PATENT SUBCLASS 526 / 78
.~.~ Adding material to an on-going polymerization reaction, said addition being other than the continuous addition of the initial charge

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}
78.~.~ Adding material to an on-going polymerization reaction, said addition being other than the continuous addition of the initial charge {4}
79  DF  .~.~.~> Adding in an incremental or sequential manner {1}
82  DF  .~.~.~> Adding polymerization inhibitor or terminator, e.g., short-stopper, etc. {3}
86  DF  .~.~.~> Adding catalyst or catalyst component
87  DF  .~.~.~> Adding monomer

DEFINITION

Classification: 526/78

(under subclass 72) Subject matter wherein material which is added to a zone, said zone containing material therein which is undergoing polymerization, and the addition of the material is other than by the continuous addition of the material contained in the initial change.

(1) Note. For purposes herein, addition proper for this subclass involves any of the following (1) the addition of material to a polymerization zone and continuing the polymerization without any subsequent addition, or (2) the addition of materials to a polymerization zone followed by the addition of materials distinct from the previous material either in whole-amount or in the addition of the same material in different concentration, or (3) the addition of material to terminate polymerization, or (4) the addition of material with the addition involving a halting, interruption, pausing, or suspending of adding material at any time during the polymerization reaction or (5) the addition of a material to a zone wherein all of the other necessary materials are present except the one being added.

SEE OR SEARCH THIS CLASS, SUBCLASS:

72+, for a method of polymerization involving the continuous addition of material to a zone.