Patent ID: 7328745
Filing Date: 2008-02-12
Classification: C07C,C07D,C09K

Abstract:
1. A method of stabilizing a clay-containing formation comprising contacting the formation with a composition comprising a polyamine salt selected from the group consisting of: a polyamine salt of an imide of a polymer of maleic anhydride, the imide having the structure: and the polyamine salt of an amide of a polymer of maleic anhydride the amide having the structure: and combinations thereof, where n ranges between 2 and 5, inclusive, X is H—(OCH 2 CH 2 ) m —O— or multiples of (I) or the structure: m ranges between 2 and 800 inclusive, R is an alkylene radical of 1 to 12 carbon atoms and R1 are each independently selected from the group consisting of H and alkyl radicals of 1 to 12 carbon atoms, and R2 is a radical of maleic anhydride, a radical of maleamide or H—(OCH 2 CH 2 ) m —O—, where m is as above, where the polyamine salt is at least partially neutralized with an acid, where the polyamine salt is made by reacting dimethylaminoprorylamine with maleic anhydride in the presence of a reactive polyalkylene glycol solvent.