FOAM CONTROL AGENT

摘要

Block copolymers having two blocks and having the general formula (III) : R<13>[(OR<14>)j (OR <16)>l< >OR <17>]m wherein R<13 >is the residue of an organic initiator; R<14 >is one or more C2-C4 alkylene groups; R<16 >is one or more C2-C4 alkylene groups; provided that R<14 >and R<16 >must be different from each other; R<17 >is a C1-C10 alkyl group; j is an integer of 5 to 80; l is an integer of l to 80; and m is an integer of 1 to 6; may be used as foam control agents, especially in the paper/pulp industries or in industrial detergents.