US PATENT SUBCLASS 528 / 480
.~ TREATING POLYMER CONTAINING MATERIAL OR TREATING A SOLID POLYMER OR A RESINIFIABLE INTERMEDIATE CONDENSATION PRODUCT

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

*  DD  SYNTHETIC RESINS (Class 520, Subclass 1) {23}
480.~ TREATING POLYMER CONTAINING MATERIAL OR TREATING A SOLID POLYMER OR A RESINIFIABLE INTERMEDIATE CONDENSATION PRODUCT {14}
481  DF  .~.~> Treating at O Deg C (32 Deg F) or below, or at 200 Deg C (392 Deg F) or above
482  DF  .~.~> Contacting with ion exchange material or solid sorbent
483  DF  .~.~> Contacting with exteriorly produced specified gaseous agent other than drying, blanket, or carrier gas
484  DF  .~.~> Preventing or removing reactor or processing equipment buildup
485  DF  .~.~> Contacting with aluminum or heavy metal material
486  DF  .~.~> Contacting with carboxylic acid, salt, or anhydride thereof
487  DF  .~.~> Contacting with sulfur or phosphorus-containing material
488  DF  .~.~> Contacting with alkali (Li, Na, K, Rb, Cs, Fr) or alkaline earth (Be, Mg, Ca, Sr, Ba) metal or compound thereof {1}
490  DF  .~.~> Contacting with specified element or with specified inorganic compound other than water, elemental nitrogen, air and the inert gases (Group VIII A)
491  DF  .~.~> Contacting with organic material {5}
499  DF  .~.~> Contacting with water {1}
501  DF  .~.~> With distilling or pressured reduction step to remove material, e.g., flashing, autorefrigeration, etc.
502 R  DF  .~.~> Physical treatment {6}
503  DF  .~.~> Temperature maintaining, heating or cooling

DEFINITION

Classification: 528/480

(under subclass 1) Processes under Class 520, ... wherein a solid polymer which has been derived from at least one ethylenic monomer, or a material which is in contact with the polymer, is treated.

(1) Note. Materials with which the polymer is in contact includes the reactants forming the polymer, their nonpolymeric reaction products, the solvents used for polymerization, etc.

(2) Note. The specific treatments provided herein need not occur in the presence of the polymer.

(3) Note. Contacting of the polymer or material in presence therewith, with a solid material which is inert and which merely functions as a physical barrier (e.g., container, storage, facility, filter paper); or which contacts the material so as to cool or heat, or which transports (e.g., pipe, tube); or which manipulates (e.g., stirrer, centrifuge) are normally not considered as a basis for classification herein.

(4) Note. This subclass provides for those processes wherein the desired polymer is not chemically modified. Processes, however, which involve a chemical reaction of material other than the polymer are proper herein.

(5) Note. This subclass provides for processes of treating a polymer not involving a chemical modification of the polymer, by the addition of a material thereto, and for chemically modifying material other than the polymer. This subclass and its indents also provide for processes of admixing with a broadly claimed nonreactant material.

SEE OR SEARCH THIS CLASS, SUBCLASS:

491+, for separating polymer by filtration from a liquid diluent and contacting the liquid diluent which is now devoid of polymer with an organic compound.

482, through 499, for contacting with material which requires the combination of at least two materials that differ in composition, for example, adding more of a given material to a solution containing that material would be considered an addition since the solution differs in composition from the added material. However, mere division of a stream into two portions, followed by a heating or cooling of one of the portions, with a subsequent recombining operation of the two portions would not be considered "contacting" since the two portions are compositionally equivalent.

SEE OR SEARCH CLASS

523, Synthetic Resins or Natural Rubbers,

1+, for a composition of a previously formed solid polymer and a nonreactive material.

525, Synthetic Resins or Natural Rubbers, for processes of chemically modifying a solid polymer by the addition of a chemical treating agent thereto.