US PATENT SUBCLASS 524 / 515
.~.~.~.~.~ Two or more solid polymers derived from ethylenic reactants only

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

*  DD  SYNTHETIC RESINS (Class 520, Subclass 1) {1}
*  DD  .~ PROCESSES OF PREPARING A DESIRED OR INTENTIONAL COMPOSITION OF AT LEAST ONE NONREACTANT MATERIAL AND AT LEAST ONE SOLID POLYMER OR SPECIFIED INTERMEDIATE CONDENSATION PRODUCT, OR PRODUCT THEREOF (Class 523, subclass 1) {17}
1  DF  .~.~ Adding a NRM to a preformed solid polymer or preformed specified intermediate condensation product, composition thereof; or process of treating or composition thereof {31}
500  DF  .~.~.~ Containing two or more solid polymers; solid polymer or SICP and a SICP, SPFI, or an ethylenic reactant or product thereof {7}
502  DF  .~.~.~.~ At least one solid polymer derived from ethylenic reactants only {11}
515.~.~.~.~.~ Two or more solid polymers derived from ethylenic reactants only {10}
516  DF  .~.~.~.~.~.~> Solid polymer derived from nitrogen heterocycle monomer
517  DF  .~.~.~.~.~.~> Solid polymer from oxygen heterocycle monomer
518  DF  .~.~.~.~.~.~> Solid polymer derived from fused or bridged ring monomer
519  DF  .~.~.~.~.~.~> Solid polymer derived from halogen-containing monomer other than vinyl or vinylidene chloride {1}
521  DF  .~.~.~.~.~.~> Solid polymer derived from a monomer containing an atom other than C, O, H, or chlorine
522  DF  .~.~.~.~.~.~> Solid polymer derived from carboxylic acid-containing monomer
523  DF  .~.~.~.~.~.~> Solid polymer derived from carboxylic acid ester monomer {1}
525  DF  .~.~.~.~.~.~> Solid polymer derived from monomer containing two or more ethylenic groups {1}
527  DF  .~.~.~.~.~.~> Solid polymer derived from chlorine-containing reactant
528  DF  .~.~.~.~.~.~> Solid polymer derived from acyclic hydrocarbon

DEFINITION

Classification: 524/515

Two or more solid polymers derived from ethylenic reactants only:

(under subclass 502) Subject matter wherein in addition to the NRM there is additionally present two or more solid polymers derived from ethylenic reactants only.

(1) Note. A reaction product of two or more solid polymers derived from ethylenic reactants admixed with a NRM is considered as being equivalent to a blend of two or more solid ethylenic polymers and as such is properly classifiable herein.

(2) Note. A blend of three or more solid polymers at least two of which are derived from ethylenic reactants only is properly classifiable herein on the basis of the two ethylenic polymers. Classification in this area is solely on the basis of reactants utilized in preparing the ethylenic polymers.

(3) Note. This area provides for blends or reaction products of two or more ethylenic polymers which have been chemically modified. Classification in this area, however, is solely on the basis of the ethylenic monomers utilized in preparing the ethylenic polymers.

(4) Note. Placement in this subclass is on the basis of the ethylenic reactants used in the preparation and not on the basis of ethylenic reactants which may be reacted with a mixture of solid polymers from ethylenic reactants only.

(5) Note. Excluded from this subclass are multistep polymerization-postpolymerization processes which occur in the presence of a single preformed solid polymer from ethylenic reactants only and an ethylenic reactant which affords a polymeric mixture. This subclass, however, does include in subclass 525 metalation of polystyrene blended with polybutadiene which is subsequently contacted with butadiene.

SEE OR SEARCH THIS CLASS, SUBCLASS:

519+, for the lithiation of styrene in the presence of polyethylene to yield solid lithium-terminated polystyrene followed by its reaction with butadiene to produce block (polybutadiene-polystyrene) in admixture with polyethylene. 525, for metalation of polyethlene blended with polybutadiene which is subsequently contacted with butadiene.