Synthesis by reacting oxirane resin with carboxyl compounds

A method for synthesizing an aliphatic hydroxyl-functional resinous product which comprises:

• providing a resin which contains aliphatic hydroxyl functionality selected from primary hydroxyl functionality, secondary hydroxyl functionality, or both and contains oxirane functionality,
• reacting said resin with a carboxyl functional capping agent bearing functionality selected from phenolic hydroxyl functionality, mercapto functionality, or both, and represented as follows:
• ##STR4## where R bears said functionality selected from phenolic hydroxyl functionality, mercapto functionality, or both;
• under conditions and for a time such that said carboxyl functionality of said capping agent selectively reacts with the oxirane functionality of said resin to produce a resinous product containing aliphatic hydroxyl functionality and containing functionality selected from phenolic hydroxyl functionality, mercapto functionality, or both, and represented as follows:
• ##STR5## where:
• A is H or ##STR6## where, y and z are integers each independently varying from 1 to about 40, b is an integer ranging from 0 to about 40, and each wavy line represents an organic chain.