US PATENT SUBCLASS 525 / 64
.~.~.~.~ Solid graft or graft-type copolymer derived from ethylenic reactants only

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

*  DD  SYNTHETIC RESINS (Class 520, Subclass 1) {4}
50  DF  .~ MIXING OF TWO OR MORE SOLID POLYMERS; MIXING OF SOLID POLYMER OR SICP WITH SICP OR SPFI; MIXING OF SICP WITH AN ETHYLENIC AGENT; MIXING OF SOLID POLYMER WITH A CHEMICAL TREATING OR ETHYLENIC AGENT; OR PROCESSES OF FORMING OR REACTING; OR THE RESULTANT PRODUCT OF ANY OF THE ABOVE OPERATIONS {32}
55  DF  .~.~ At least one solid polymer derived from ethylenic reactants only {25}
63  DF  .~.~.~ Mixing of solid graft or graft-type copolymer with other solid polymer wherein one of said solid polymers is not derived from ethylenic reactants only; mixing of said polymer mixture with a chemical treating agent; or mixing of graft or graft-type copolymer with a SICP or SPFI; or processes of forming or reacting; or the resultant product of any of the above operations {2}
64.~.~.~.~ Solid graft or graft-type copolymer derived from ethylenic reactants only {4}
65  DF  .~.~.~.~.~> With saturated 1,2-epoxy reactant containing more than one 1,2-epoxy group per mole or polymer derived therefrom; or with solid copolymer derived from at least one unsaturated 1,2-epoxy reactant wherein the epoxy reactant contains more than one 1,2-epoxy group per mole and at least one saturated reactant
66  DF  .~.~.~.~.~> With solid polymer derived from at least one nitrogen-containing reactant wherein at least one of the reactants forming the solid polymer is saturated; or with SPFI wherein at least one of the necessary ingredients contains a nitrogen atom or with a reaction product thereof; or with nitrogen-containing SICP
67  DF  .~.~.~.~.~> With solid polymer derived from at least one hal-C(=O)-hal, O-C(=O)-O or hal-C(=O)-O- reactant wherein at least one of the reactants forming the solid polymer is saturated; or with SPFI wherein at least one of the necessary ingredients is a hal-C(=O)-hal, O-C(=O)-O, or hal-C(=O)-O containing reactant or reaction product thereof; or with a SICP containing a hal-C(=O)- or O-C(=O)-O- group
68  DF  .~.~.~.~.~> With solid polymer derived from at least one phenolic reactant wherein at least one of the reactants forming the solid polymer is saturated; or with SPFI wherein at least one of the necessary ingredients is a phenolic reactant or with a reaction product thereof; or with phenolic-containing SICP

DEFINITION

Classification: 525/64

Solid graft or graft-type copolymer derived from ethylenic reactants only:

(under subclass 63) Subject matter wherein the solid graft or graft-type copolymer was derived from a solid polymer derived from only ethylenically unsaturated reactants which was subsequently reacted with ethylenic reactants, e.g., styrene and acrylonitrile graft-copolymerized onto poly (butadiene-styrene), etc.

(1) Note. The preparation of a graft copolymer from all or some of its constituents in the presence of a solid polymer derived from ethylenic reactants only would be classified elsewhere.

(2) Note. This subclass provides for all graft or graft-type copolymers wherein a solid polymer from ethylenic reactants only is treated with polymer-forming ingredients in any sequence. For instance, this subclass would provide for a graft or graft-type copolymer prepared by treating a solid polymer from ethylenic reactants only with ethylene glycol followed by reacting with maleic anhydride; or wherein the polymer is first reacted with maleic anhydride followed by reaction with ethylene glycol. This subclass also provides for graft or graft-type copolymers which are prepared by treating a solid polymer from ethylenic reactants only concurrently with ethylene glycol and maleic anhydride.

SEE OR SEARCH THIS CLASS, SUBCLASS:

193, for the process of grafting styrene and acrylonitrile onto polybutadiene in the presence of polyerthylene.