HYDROPHILIC BINDER SYSTEM FOR POROUS SUBSTRATES

摘要

A hydrophilic binder system for porous substrates, for instance, plant growth systems, is obtained by (A) reacting at least one acid component selected from di- and polycarboxylic acids and anhydrides thereof and at least one polyhydroxy component selected from polyalkylene glycols, copolymers and derivatives thereof to form a polyalkylene glycol ester; and (B) reacting the obtained polyalkylene glycol ester having carboxylic acid functionality with a phenolic resin.