SOLVENT-FREE PROCESS FOR FUNCTIONALIZING ISOBUTYLENE-BASED POLYMERS

• Main Authors: PHAM TU N, FREAS DAVID J, BLOK EDWARD J, NGUYEN PAUL T QU, DIAS ANTHONY J, CHEN YUAN-JU
• Format: Patent
• Language: Chinese; English
• Published: 11.12.2020
• Subjects: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; COMPOSITIONS BASED THEREON; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; THEIR PREPARATION OR CHEMICAL WORKING-UP; THEIR RELEVANT APPARATUS; TRANSPORTING

Methods of post-polymerization modification of a polymer are provided herein. The present methods comprise the step of reacting a polymer with at least one nucleophile in a nucleophilic substitution reaction performed without a solvent to produce a functionalized polymer. The nucleophile can be selected from the group consisting of thioacetate, phenoxide, alkoxide, carboxylate, thiolate, thiocarboxylate, dithiocarboxylate, thiourea, thiocarbamate, dithiocarbamate, xanthate, thiocyanate. Nucleophilic substitution reaction can be performed in the presence of a phase transfer catalyst. Nucleophilic substitution reaction can also be performed via a two-step in-situ reactive mixing process with the initial formation of the polymer-amine ionomer (polymer-NR3 +Br) which catalyzes the subsequent nucleophilic substitution with a second nucleophile to form a bi-functional polymer. 本文提供聚合物的聚合后改性方法。本方法包括使聚合物与至少一种亲核试剂在没有溶剂的情况下进行的亲核取代反应中反应以生产官能化的聚合物的步骤。亲核试剂可选自以下：硫代乙酸盐、酚盐、醇盐、羧酸盐、硫醇盐、硫代羧酸盐、二硫代羧酸盐、硫脲、硫代氨基甲酸盐、二硫代氨基甲酸盐、黄原酸盐、硫氰酸