US PATENT SUBCLASS 525 / 28
.~.~ Mixed with -N=C=X reactant or polymer derived therefrom (X is chalcogen)

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}
10  DF  .~ ETHYLENICALLY UNSATURATED REACTANT ADMIXED WITH EITHER (A) A POLYMER DERIVED FROM A SATURATED DI- OR HIGHER ESTER OF A POLYCARBOXYLIC ACID AS SOLE REACTANT, OR (B) REACTION PRODUCT OF ONLY POLYCARBOXYLIC ACIDS OR ANHYDRIDES WITH ONLY COMPOUNDS HAVING AT LEAST TWO HYDROXYL GROUPS AT LEAST ONE OF WHICH IS SATURATED AND WHEREIN THE REACTION PRODUCT FORMED IS NOT AFTERTREATED PRIOR TO ADMIXTURE WITH THE UNSATURATED REACTANT EXCEPT WITH A POLYCARBOXYLIC ACID, POLYCARBOXYLIC ACID ANHYDRIDE, OR A POLYOL, AND WHEREIN NO SOLID POLYMER DERIVED FROM ETHYLENIC REACTANTS ONLY IS MIXED THEREWITH {14}
28.~.~ Mixed with -N=C=X reactant or polymer derived therefrom (X is chalcogen)

DEFINITION

Classification: 525/28

Mixed with -N C=X reactant or polymer derived therefrom (X is chalcogen):

(under subclass 10) Subject matter wherein a polymer derived from di- or higher ester of polycarboxylic acid as sole reactant or derived from polycarboxylic acid or anhydride and polyhydroxy compound is mixed with an ethylenic reactant and, additionally, is mixed with a -N C=X reactant or polymer derived thereof (X is chalcogen).

(1) Note. The term -N C=X reactant includes blocked or masked isocyanates. See subclass 395 for a discussion of terms.

(2) Note. Included herein are polyester unsaturated monomer mixtures which are aftertreated with an isocyanate reactant. In those instances wherein the solid polyester is reacted with the isocyanate prior to mixing with the unsaturated reactant, see this class, subclass 440.