US PATENT SUBCLASS 525 / 70
.~.~.~ Mixing of solid graft or graft-type copolymer derived from ethylenic reactants only with other solid polymer derived from ethylenic reactants only; or treating said mixture with chemical treating agent; or processes of forming or reacting; or the resultant product of any of the above operations

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}
70.~.~.~ Mixing of solid graft or graft-type copolymer derived from ethylenic reactants only with other solid polymer derived from ethylenic reactants only; or treating said mixture with chemical treating agent; or processes of forming or reacting; or the resultant product of any of the above operations {11}
71  DF  .~.~.~.~> Contains two or more graft or graft-type copolymers or a graft or a graft type copolymer and at least one block or block-type copolymer
72  DF  .~.~.~.~> Mixture contains solid polymer derived from reactants containing an atom other than C, H, O, N, or chlorine
73  DF  .~.~.~.~> Mixture contains solid polymer derived from reactant containing nitrogen heterocycle
74  DF  .~.~.~.~> Mixture contains solid polymer derived from reactant containing oxygen heterocycle
75  DF  .~.~.~.~> Mixture contains solid polymer derived from reactant containing a fused- or bridged-ring system or from cycloaliphatic reactant
76  DF  .~.~.~.~> Mixture contains solid polymer derived from chlorine-containing reactant other than from vinyl(idene) chloride
77  DF  .~.~.~.~> Mixture contains solid polymer derived from reactant containing nitrogen other than from (meth)acrylonitrile
78  DF  .~.~.~.~> Mixture contains solid polymer derived from reactant containing carboxylic acid group
79  DF  .~.~.~.~> Mixture contains solid polymer derived from reactant containing ether or hydroxyl group
80  DF  .~.~.~.~> Mixture contains solid polymer derived from reactant containing carboxylic acid ester group {3}
86  DF  .~.~.~.~> Mixture contains solid polymer derived from nonaromatic reactant containing plural ethylenically unsaturated groups {1}

DEFINITION

Classification: 525/70

Mixing of solid graft or graft-type copolymer derived from ethylenic reactants only with other solid polymer derived from ethylenic reactants only; or treating said mixture with chemical treating agent; or processes of forming or reacting; or the resultant product of any of the above operations:

(under subclass 55) Subject matter which involves the mixing of a solid graft-type copolymer derived from ethylenic reactants only with other solid polymers derived from ethylenic reactants only; or treating said polymer mixture with a chemical treating agent; or process of forming or reacting; or the resultant product of any of the above mixtures.

(1) Note. This subclass does not include those reactions which involve the preparation of a graft or graft-type copolymer in the presence of another solid ethylenic polymer.

(2) Note. This subclass provides for the mixing of two or more solid polymers at least one of which is a graft-type copolymer and both being derived from ethylenic reactants only. This subclass does not exclude the aftertreatments of ethylenic polymers or graft or graft-type copolymers with nonethylenic materials. However, classification in this area is based only on ethylenic materials (e.g., halogenated polybutadiene grafted with maleic anhydride). For purposes of classification in this area, only polybutadiene and maleic anhydride are to be considered in making the graft copolymer and not the halogenated polybutadiene.

(3) Note. "Solid polymer" as used in this subclass is generic and includes a nongraft polymer as well as a graft or graft-type polymer all of which were produced only from ethylenic reactants.

SEE OR SEARCH THIS CLASS, SUBCLASS:

63, for definitions of the terms "graft copolymer and graft-type copolymers".

193, for a final product mixture of polyvinylchloride and polybutadiene grafted to poltstyrene-acrylonitrile, obtained by aftertreating a mixture of polyvinyl chloride and polybutadiene with styrene and acrylonitrile. 313, for the same product when obtained from a mixture of polyvinyl chloride and butadine, styrene, and acrylonitrile.