| 525 / | HD | SYNTHETIC RESINS OR NATURAL RUBBERS -- PART OF THE CLASS 520 SERIES |
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| * | 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} |
| 452 | DF | .~.~ Solid polymer derived from -N=C=X reactant (X is chalcogen) {1} |
| 453 |  | .~.~.~ Solid polymer derived from -N=C=X reactant and polyhydroxy reactant {6} |
| 454 | DF | .~.~.~.~> Mixed with carboxylic acid or derivative reactant or polymer derived therefrom; or with heterocyclic reactant containing more than one heterocyclic ring; or polymer therefrom |
| 455 | DF | .~.~.~.~> Mixed with ethylenically unsaturated reactant or polymer therefrom |
| 456 | DF | .~.~.~.~> Mixed with aldehyde or aldehyde derivative reactant or polymer therefrom |
| 457 | DF | .~.~.~.~> Mixed with -N=C=X reactant or polymer therefrom {1} |
| 459 | DF | .~.~.~.~> Solid polymer derived from -N=C=X reactant and polyhydroxy reactant also derived from polyamine reactant |
| 460 | DF | .~.~.~.~> Solid polymer derived from -N=C=X reactant and polyhydroxy reactant derived from polyhydroxy reactant containing an ether group |