US PATENT SUBCLASS 525 / 418
.~.~ Solid polymer derived from at least one carboxylic acid or derivative

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}
418.~.~ Solid polymer derived from at least one carboxylic acid or derivative {3}
419  DF  .~.~.~> Solid polymer derived from at least one lactam; from an amino carboxylic acid or derivative; or from a polycarboxylic acid or derivative {3}
450  DF  .~.~.~> Solid polymer derived from hydroxy-containing carboxylic acid or derivative reactant
451  DF  .~.~.~> Solid polymer derived from carboxylic acid or derivative derived from ethylenically unsaturated reactant

DEFINITION

Classification: 525/418

Solid polymer derived from at least one carboxylic acid or derivative:

(under subclass 50) Subject matter involves processes of mixing a solid polymer derived from at least one carboxylic acid or derivative with additional solid polymer, with specified polymer-forming ingredients, with an intermediate condensation product, chemical treating agent or with ethylenic agent; processes of reacting the above mixtures or products resulting from the above processes.

(1) Note. A derivative of a carboxylic acid is limited to a nitrile, ester, anhydride, salt, amide, imide, lactam, lactone, and acyl halide.

(2) Note. In carboxylic acids and their derivatives, certain compounds may have more than one function, e.g., a lactone is a species of esters, a lactam is a species of an amide. Compounds which are multifunctional are classified on the basis of the first appearing function provided in the subclass hierarchy.

(3) Note. A polycarboxylic acid reactant for purposes of this subclass requires the presence of at least two carboxylic acid groups. A polycarboxylic derivative requires at least one carboxylic acid group and at least one carboxylic acid derivative, or at least two identical carboxylic acid derivatives, or at least two different carboxylic acid derivatives.

(4) Note. For purposes of this subclass an anhydride having the general formula, -Cn-O-C-C-, which may be linear or cyclic, is considered as being a polycarboxylic acid. A compound having both an anhydride and a free carboxylic acid is considered as being a tricarboxylic acid, e.g., as in the first illustration below, and a compound containing two anhydride groups is considered as being a tetracarboxylic acid, e.g., as in the second illustration, below. [figure] [figure]

(5) Note. An imide is considered as being a dicarboxylic acid derivative.

(6) Note. An organic amine salt of a carboxylic acid has been classified as if it were a mixture of an amine and a

carboxylic acid. An organic diamine salt of a dicarboxylic acid where the amine salt-forming groups are identical is considered as being a single amine compound, whereas if the amine groups are different then they are regarded as two amine compounds. Where the compound contains two or more nitrogen atoms bonded to the same or different noncarbonyl carbon atom then they are to be regarded as polyamines. SEE OR SEARCH CLASS

520, Synthetic Resins or Natural Rubbers, the Glossary, for the definition of "amine" and for a furthur elucidation of "carboxyclic acid or derivative".

528, Synthetic Resins or Natural Rubbers,

263, for an explanation of the term "polyamine".