Description: 524 synthetic resins or natural rubbers -- part of the class 520 series / 524 synthetic resins or natural rubbers -- part of the class 520 series/() synthetic resins (class 520, subclass 1) () processes of preparing a desired or intentional composition of at least one nonreactant material and at least one solid polymer or specified intermediate condensation product, or product thereof (class 523, subclass 1) (1) adding a nrm to a preformed solid polymer or preformed specified intermediate condensation product, composition thereof; or process of treating or composition thereof (27) carbohydrate or derivative dnrm (35) cellulose (42) ether group containing, other than solely linking carbohydrate groups directly to each other (43) hydroxyalkyl
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