Organic compounds -- part of the class 532-570 series – Organic compounds – Oxygen containing
Patent
1986-08-06
1988-05-17
Lone, Werren B.
Organic compounds -- part of the class 532-570 series
Organic compounds
Oxygen containing
568606, 568620, 252321, 528421, C07C 4311
Patent
active
047452315
ABSTRACT:
Block polymers usable as defoamers have the following formula ##STR1## in which R represents a glycerol or polyglycerol function having a degree of polymerization x of from 1 to 6 and the indices y is equal to (x-z+2), z is equal to (x-y+2), a is equal to 1 to 15, b is equal to 50 to 200 c is equal to 1 to 15, d is equal to 20 to 150 and e is equal to 1 to 15, with the proviso that the sums (a+c+e) is equal to 2 to 20, (b+d) is equal to 50 to 250 and (c+e) is equal to 1 to 15, and y has a value of at least 1.
The block polymers are prepared by reaction of glycerol or polyglycerol having a degree of polymerization x with ethylene oxide, then with propylene oxide and, finally, again with ethylene oxide, preferably in the presence of alkaline etherification catalysts.
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8611692, 2-1987, European Search Report.
Asbeck Adolf
Herrmann Klaus
Hoefer Rainer
Lange Fritz
Schmid Karl-Heinz
Grandmaison Real J.
Henkel Kommanditgesellschaft auf Aktien
Lone Werren B.
Millson Jr. Henry E.
Szoke Ernest G.
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