Method and composition for inhibiting foam in aqueous liquids

Claim 1

A METHOD OF INHIBITING FOAMING IN AN AQUEOUS LIQUID SUBJECT TO FOAMING WHICH COMPRISES ADDING TO SAID LIQUID AN EMULSION COMPRISING WATER, A POLYACYLATED POLYALKYLENE POLYAMINE FROM THE GROUP CONSISTING OF POLYETHYLENE POLYAMINES AND POLYPROPYLENE POLYAMINES, SAID POLYACYLATED POLYALKYLENE POLYAMINE CONTAINING AT LEAST TWO ACYL GROUPS EACH HAVING AT LEAST ONE HYDROXY SUBSTITUENT AND AT LEAST 12 CARBON ATOMS, THE TOTAL NUMBER OF CARBON ATOMS IN THE MOLECULE BEING WITHIN THE RANGE OF 30 TO 60 CARBON ATOMS, INCLUSIVE, A WATERIMMISCILBE THINNER IN WHICH SAID POLYAMINE IS AT LEAST PARTIALLY SOLUBLE, AND A QUANTITY OF A SALT OF AN AMINE EFFECTIVE TO EMULSIFY SAID POLYACYLATED POLYALKYLENE POLYAMINE, SAID SALT OF SAID AMINE BEING A SALT OF A WATER SOLUBLE ACID WITH AN AMINE SELECTED FROM THE GROUP CONSISTING OF PRIMARY ALKYLK MONO-AMINES IN WHICH THE ALKYL GROUP CONTAINS AT LEAST 8 CARBON ATOMS, SECONDARY ALKYL MONO-AMINES IN WHICH THE ALKYL GROUP CONTAIN AT LEAST 8 CARBON ATOMS TERTIARY ALKYL MONO-AMINES IN WHICH THE ALKYL GROUPS CONTAIN AT LEAST 5 CARBON ATOMS, AROMATIC MONO-AMINES AND HETEROCYCLIC AMINES, THE QUANTITY OF SAID WATER IMMISCIBLE THINNER NOT EXCEEDING 5 PARTS BY WEIGHT PER PART OF SAID POLYACYLATED POLYALKYLENE POLYAMINE AND NOT EXCEEDING 50% BY WEIGHT OF THE TOTAL WEIGHT OF THE EMULSION, THE QUANTITY OF SAID POLYACYLATED POLYALKYLENE POLYAMINE NOT EXCEEDING 50% BY WEIGHT OF THE TOTAL EMULSION, THE QUANTITY OF THE AMINE SALT BEING WITHIN THE RANGE OF 0.1 TO 0.5 PART BY WEIGHT PER PART OF SAID POLYACYLATED POLYALKYLENE POLUAMINE AND THINNER, AND THE QUANTITY OF SAID EMULSION BEING EFFECTIVE TO INHIBIT SAID FOAMING.

Claim 2

A METHOD OF INHIBITING FOAMING IN AN AQUEOUS LIQUID SUBJECT TO FOAMING WHICH COMPRISES ADDING TO SAID LIQUID AN EMULSION COMPRISING WATER, A POLYACYLATED POLYALKYLENE POLYAMINE FROM THE GROUP CONSISTING OF POLYETHYLENE POLYAMINES AND POLYPROPYLENE POLYAMINES, SAID POLYACYLATED POLYALKYLENE POLYAMINE CONTAINING AT LEAST TWO ACYL GROUPS EACH HAVING AT LEAST ONE HYDROXY SUBSTITUENT AND AT LEAST 12 CARBON ATOMS, THE TOTAL NUMBER OF CARBON ATOMS IN THE MOLECULE BEING WITHIN THE RANGE OF 30 TO 60 CARBON ATOMS, INCLUSIVE, A WATERIMMISCILBE THINNER IN WHICH SAID POLYAMINE IS AT LEAST PARTIALLY SOLUBLE, AND A QUANTITY OF A SALT OF AN AMINE EFFECTIVE TO EMULSIFY SAID POLYACYLATED POLYALKYLENE POLYAMINE, SAID SALT OF SAID AMINE BEING A SALT OF A WATER SOLUBLE ACID WITH AN AMINE SELECTED FROM THE GROUP CONSISTING OF PRIMARY ALKYLK MONO-AMINES IN WHICH THE ALKYL GROUP CONTAINS AT LEAST 8 CARBON ATOMS, SECONDARY ALKYL MONO-AMINES IN WHICH THE ALKYL GROUP CONTAIN AT LEAST 8 CARBON ATOMS TERTIARY ALKYL MONO-AMINES IN WHICH THE ALKYL GROUPS CONTAIN AT LEAST 5 CARBON ATOMS, AROMATIC MONO-AMINES AND HETEROCYCLIC AMINES, THE QUANTITY OF SAID WATER IMMISCIBLE THINNER NOT EXCEEDING 5 PARTS BY WEIGHT PER PART OF SAID POLYACYLATED POLYALKYLENE POLYAMINE AND NOT EXCEEDING 50% BY WEIGHT OF THE TOTAL WEIGHT OF THE EMULSION, THE QUANTITY OF SAID POLYACYLATED POLYALKYLENE POLYAMINE NOT EXCEEDING 50% BY WEIGHT OF THE TOTAL EMULSION, THE QUANTITY OF THE AMINE SALT BEING WITHIN THE RANGE OF 0.1 TO 0.5 PART BY WEIGHT PER PART OF SAID POLYACYLATED POLYALKYLENE POLUAMINE AND THINNER, AND THE QUANTITY OF SAID EMULSION BEING EFFECTIVE TO INHIBIT SAID FOAMING.