US PATENT SUBCLASS 530 / 215
.~.~ Esterification of rosin or derivative via carboxyl group, or product thereof

Current as of: June, 1999
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530 /   HD   CHEMISTRY: NATURAL RESINS OR DERIVATIVES; PEPTIDES OR PROTEINS; LIGNINS OR REACTION PRODUCTS THEREOF

200  DF  NATURAL RESINS OR DERIVATIVES (E.G., WOOD OR PINE TAR; CATIVO RESIN DERIVATIVES, ETC.) {6}
210  DF  .~ Rosin or derivative used as starting material in process, or product thereof (e.g., using gum rosin, wood rosin, solid tall oil rosin, etc.) {10}
215.~.~ Esterification of rosin or derivative via carboxyl group, or product thereof {3}
216  DF  .~.~.~> Chemical treatment or color modification of esterified rosin or derivative, or product thereof (e.g., partial saponification of rosin triglycerides; removal of color bodies from rosin esters, etc.)
217  DF  .~.~.~> Oxygen containing ring or halogen containing material used in the esterification, or product thereof (e.g., using alkylene oxides, polysaccharides, alkyl halides, etc.)
218  DF  .~.~.~> Polyhydroxy material used in the esterification, or product thereof (e.g., forming ester gum, etc.)

DEFINITION

Classification: 530/215

(under subclass 210) Processes wherein the carboxyl group of rosin or of a derivative thereof is esterified, or products of such processes.

(1) Note. Search this class, appropriate subclasses, for the esterification of rosin via an alcoholic hydroxy group which has been introduced into rosin by a chemical reaction, e.g., with formaldehyde.