| 摘要 |
Branched polymer defoamers for pigment dispersants. The branched polymers are the reaction products of a linking agent defined by formula (I):wherein each Y group is a halogen atom or one Y group is a halogen atom and two Y groups together represent an epoxy oxygen atom, which is attached to two adjacent carbon atoms in the R group to form an epoxy group, and R is an alkanetriyl group containing from 3 to 10 carbon atoms, andb) at least one compound having the formula (II)wherein R1 is a substituted or unsubstituted, saturated or unsaturated, organic group having from 4 to 36 carbon atoms; x is -O-, -S-, or -NR2-where R2 is hydrogen or a C1-C4 alkyl group; Z is hydrogen, -NHR2 in place of a terminal -O- group wherein R2 has the meaning given above, or -SH, in which the -SH group is present in place of a terminal -O- group; n is a number of from 0 to 100, e.g., from 1 to 100; m is a number of from 0 to 50 e.g., from 1 to 50; and p is a number of from 0 to 50 e.g., from 1 to 50; provided that the sum of n, m, and p is at least 1; and wherein EO, PO and BO groups when present can be in random and/or block distribution and can be in any order with respect to the X group. |
