Foam inhibitor mixture

Details Foam inhibitor mixture Foam inhibitor mixture

1987-04-16

1989-01-10

Lieberman, Paul

Compositions

Water-softening or purifying or scale-inhibiting agents

25217422, 252321, 252358, C11D 172, B01D 1904

Patent

active

047972220

ABSTRACT:
A foam inhibitor mixture of compounds corresponding to the following formulae: ##STR1## in which R represents a glycerol residue, trimethylol ethane residue, trimethylol propane residue or a polyglycerol residue having a degree of polymerization x of from 2 to 6 and the indices y=(x-z+2), z=(x-y+2), a=1 to 15, b=50 to 250, c=1 to 15, d=50 to 250 and e=1 to 15, with the proviso that the sums (a+c+e)=2 to 20, (b+d)=50 to 250 and (c+e)=1 to 15 and y has a value of at least 1; R.sup.1 represents a straight-chain or branched-chain alkyl or alkenyl radical containing from 8 to 20 C-atoms or an aromatic alkyl radical containing from 12 to 20 C-atoms, R.sup.2 represents an alkyl radical containing from 3 to 8 C-atoms and n is a number of from 4 to 30. The mixture preferably contains from 99 to 70% by weight of the block polymer (I) and from 1 to 30% by weight of the emulsifier (II).

REFERENCES:
patent: 4548729 (1985-10-01), Schmid et al.
patent: 4745231 (1988-05-01), Lange et al.

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