Vinyl grafted lignite fluid loss additives

Compositions: coating or plastic – Coating or plastic compositions – Inorganic settable ingredient containing

Patent

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Details

106720, 106669, 106803, 527500, 527400, 523202, 524 3, 524 5, 252 8513, C04B 2434, C08K 5100, C09K 702

Patent

active

049388037

ABSTRACT:
A vinyl grafted lignite fluid loss additive comprising a lignite grafted with at least one vinyl monomer selected from the group consisting of: dimethylaminopropyl methacrylamide, methacrylamido propyltrimethyl ammonium chloride, N-vinylformamide, N-vinylacetamide, diallyl dimethyl ammonium chloride, and diallylamine. The vinyl monomer may also be blended with at least one co-monomer. Preferred co-monomers are: 2-acrylamido-2-methylpropanesulfonic acid, dimethylacrylamide, acrylamide, vinylpyrrolidone, vinylacetate, acrylonitrile, dimethylaminoethyl methacrylate, styrenesulfonate, vinylsulfonate, dimethylaminoethyl methacrylate methyl chloride quaternary, acrylic acid and its salts.

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