US PATENT SUBCLASS 525 / 327.8
.~.~.~.~.~ Hydrolyzed; neutralized; or metal containing chemical treating agent

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


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}
326.1  DF  .~.~.~ Chemically after treated solid polymers derived from ethylenically unsaturated monomers only {24}
327.4  DF  .~.~.~.~ Polymer derived from carboxylic acid anhydride monomer {4}
327.8.~.~.~.~.~ Hydrolyzed; neutralized; or metal containing chemical treating agent

DEFINITION

Classification: 525/327.8

Hydrolyzed; neutralized; or metal containing chemical treating agent:

(under subclass 327.4) Product wherein a chemical modification of the solid polymer is described as hydrolysis or neutralization; or wherein a metal containing chemical treating agent has been employed.

(1) Note. For purposes of this subclass, hydrolysis relates to addition of water to open the anhydride structure with formation of two carboxyl groups. In the absence of disclosure otherwise, treatment of anhydride with an aqueous system is presumed to result in a hydrolysis of the anhydride structure.

(2) Note. For purposes of this subclass, neutralization relates to the reaction of an acid group, e.g., carboxyl, phosphonic, etc., with a base to form a salt. The bases include alkali, alkaline earth, or ammonium hydroxides.

(3) Note. The metal containing chemical treating agent need only be present during a chemical modification step; included in this subclass, however, are systems wherein a metal atom becomes chemically bonded to the solid polymer. The chemical bond can be ionic or covalent in nature, or any of the "complex" bonding mechanisms as in pi (ii) bonding, coordination, etc.