US PATENT SUBCLASS 525 / 63
.~.~.~ 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

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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.~.~.~ 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  DF  .~.~.~.~> Solid graft or graft-type copolymer derived from ethylenic reactants only {4}
69  DF  .~.~.~.~> Solid graft or graft-type copolymer contains backbone derived from ethylenic reactants only

DEFINITION

Classification: 525/63

Mixing of solid graft or graft-type copolymer with other solid polymers 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 specified intermediate condensation product or specified polymer-forming ingredients; or processes of forming or reacting; or the resultant product or any of the above operation:

(under subclass 55) Subject matter which involves mixing of a solid graft or graft-type copolymer with other solid polymer(s) wherein the solid polymer, graft, or graft-type copolymer(s) is not derived exclusively from ethylenic reactants; or mixing of said polymeric mixture with a chemical treating agent; or mixing of graft or graft-type copolymer with a specified intermediate condensation product or with specified polymer-forming ingredients, or polymer thereof; or processes of forming or the resultant product of any of the above mixtures.

(1) Note. A nonethylenically polymerized solid graft, solid graft-type or nongraft polymer is one which was obtained as a solid other than from ethylenic polymerization exclusively. This would include, for example, such polymers as ethylene-carbon monoxide copolymer, ethylene-ethylene oxide block copolymer, caprolactam-styrene graft copolymer and the typical poly condensation polymers (e.g., polyesters, polyamines and polyurethanes, etc.).

(2) Note. The product derived from the reaction of a solid polymer substrate from ethylenic reactants only and a nonethylenic reactant to form a graft or graft-type copolymer

is not considered as being of the type derived from ethylenic reactants only. Similarly, the product obtained obtained from graft copolymerizing an ethylenic reactant onto a solid polymer not derived exclusively from ethylenic reactants is also not considered as being a graft or graft-type copolymer derived from ethylenic reactants only. For purposes of classification a polymer is classified as: (A) A graft copolymer when

(1) The structure is given, i.e., to a long solid polymer backbone (substrate) is attached a pendant (nonterminal) polymer or copolymer superstrate with at least three reactant units in length or,

(2) the copolymer is so named as a graft providing that the disclosure is otherwise silent as to the structure or, if structure is likewise recited, it is consistent with that required in A.1 above or,

(3) the structure can be ascertained from the following limiting process conditions: (a) The disclosure states there is a reaction between a solid polymerized unsaturated reactant and an unpolymerized unsaturated reactant in the presence of a catalyst or, (b) the disclosure does not state whether or not any reaction has occurred between the solid polymerized unsaturated reactant and the unpolymerized unsaturated reactant, but relates that a product is obtained which is inseparable by a variety of physical techniques such as, extraction, precipitation, ion exchange, etc. In the absence of one or more or these requirements the reaction is considered to produce a polymeric blend.

(B) A graft-type copolymer when (1) The structure is given, i.e., to a long solid polymer backbone (substrate) possessing nonterminal active sites or functional groups is attached (grafted) through a chemical reaction with these functional groups or sites an ethylenic reactant containing one or more functional groups or active sites. The reaction product may or may not possess unsaturated pendant groups depending on the mode of chemical reaction. The following examples will illustrate this point [figure] [figure]

(2)

The structure can be ascertained when:

(a) There is disclosed a reaction between the solid polymerized unsaturated reactant and the unpolymerized unsaturated reactant which reaction uses specific art-recognized terms (e.g., esterfication, acylation, sulfonylation, cyanoethylection, addition to, reaction or condensation with, halogenation, nitration, sulfonation, alkylation, amination, etc.). An example of these reactions would be: [figure]

(b) There is disclosed an interaction between two or more solid polymers through their respective nonterminal functional groups or through the use of an intermediate reactant or chemical agent (e.g., causing salt, ester, amide, urea formation). Examples of these reactions would be: (1) Contacting polypropylene and polyethylene with benzoyl peroxide (2) Contacting polyvinylamine and polyallylamine with glyoxal (3) Contacting chloromethylated polystyrene with polyvinylamine (4) Contacting polyacrylic acid with polyvinylamine In the absence of one or more of these requirements the reaction is considered to produce a polymeric blend.

SEE OR SEARCH CLASS

520, Synthetic Resins or Natural Rubbers, the Glossary, for the definition of the terms "specified intermediate condensation product" and "specified polymer-forming ingredients".