Methylene phosphonates of polymerized polyalkylenepolyamines
AssigneePetrolite Corporation
InventorPatrick M. Quinlan
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Abstract
Methylene phosphonates of polyalkylenepolyamines polymerized with chain extenders such as epoxyhalides, dihalides, etc., such as epihalohydrin, alkylenedihalide, alkenyldihalide, alkynylenedihalide, xylylenedihalide, alkyleneetherdihalides, etc.; and to uses therefor, particularly as scale inhibitors, chelating agents, etc.
Claims8
Methylene phosphonates of polymers selected from the group consisting of polyalkylenepolyamine-epihalohydrin polymers and polyalkylenepolyamine-dihalide compound polymers, said dihalide compounds being an alkylene ether dihalide compound, or an unsaturated dihalide compound, said methylene phosphonate polymers having nitrogen-bonded methylene phosphonate units of the formula
- --CH.sub.2 PO(OM).sub.2
- where M is alkali metal, alkaline earth metal, hydrogen, alkyl ammonium or ammonium, the terminal nitrogen atoms of said methylene phosphonate polymers having no more than one methylene phosphonate group attached thereto, the remaining valence of the terminal nitrogen atom having attached thereto the group ##STR29## a divalent aliphatic ether radical or a divalent unsaturated aliphatic radical, said polymers being those having controlled crosslinking so that they are soluble in, dispersible in or soluble and dispersible in an aqueous medium.
Dependencies are inferred from the claim text.