US PATENT SUBCLASS 524 / 871
.~.~ N=C=X containing reactant forming a solid polymer or SICP in the presence of a nonreactant material (X is chalcogen)

Current as of: June, 1999
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524 /   HD   SYNTHETIC RESINS OR NATURAL RUBBERS -- PART OF THE CLASS 520 SERIES

*  DD  SYNTHETIC RESINS (Class 520, Subclass 1) {1}
*  DD  .~ 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) {17}
871.~.~ N=C=X containing reactant forming a solid polymer or SICP in the presence of a nonreactant material (X is chalcogen) {4}
872  DF  .~.~.~> Two or more N=C=X containing reactants (other than conventional isomer mixtures)
873  DF  .~.~.~> Aliphatic or cycloaliphatic N=C=X compound
874  DF  .~.~.~> With N-containing reactant
875  DF  .~.~.~> With two or more alcohol hydroxyl compounds

DEFINITION

Classification: 524/871

N=C=X containing reactant forming a solid polymer or SICP in the presence of a nonreactant material (X is chalcogen):

(under subclass 1) Subject matter under Class 523, ... wherein said desired or intentional composition is produced by formation of a solid polymer or SICP from at least one N=C=X containing reactant in the presence of a nonreactive material.

(1) Note. X is chalcogen, i.e., O, S, Se, or Te, e.g., isocyanate, etc.

(2) Note. Included herein are the so-called "blocked" isocyanates which regenerate free isocyanate during the course of the reaction, e.g., phenol blocked isocyanates, etc.