Alkoxylated bis-amide defoaming compounds

Details Alkoxylated bis-amide defoaming compounds Alkoxylated bis-amide defoaming compounds

1989-08-24

1990-10-02

Lacey, David L.

Compositions

Preservative agents

Anti-corrosion

252321, 564159, 162 5, 162 72, C07C23301, B01D 1904, D21C 328

Patent

active

049605402

ABSTRACT:
The present invention involves new anti-foam compositions which control foaming in aqueous systems and by nature of their inverse cloud point characterisitics are insoluble and particulate above their inverse cloud point, and soluble below it. This property makes them particulate non-depositing defoamers. As the defoamed aqueous system cools down these novel products become soluble, preventing insoluble material (pitch) from depositing on process equipment and matter being processed. The anitfoam composition is an alkoxylated bis-amide of the following formula: ##STR1## where R.sup.1 is ##STR2## R.sup.2 is --(CH.sub.2).sub.a --; R.sup.3 is alkyl C.sub.12 to C.sub.20 ; ##STR3## x,y,z are each independently integers from 0 to 20; a is an integer from 1 to 5;

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patent: 3923683 (1975-12-01), Michalski et al.
patent: 4107073 (1978-08-01), Maciaszek
patent: 4556497 (1985-12-01), Horodysky
patent: 4696761 (1987-09-01), Haubennestel et al.

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