PARAFFIN DEPOSITION INHIBITORS Russian patent published in 2009 - IPC E21B37/06 C10G75/04 C09K8/524 

FIELD: chemistry.

SUBSTANCE: invention relates to polymers which are used as an additive for inhibiting deposition of paraffin. Versions of paraffin deposition inhibitors are proposed, containing a polymer which is obtained from: (a) from approximately 1 to approximately 98 wt % of one or more C₁-C₃₀-alkyl esters of acrylic acid; (b) from approximately 1 to approximately 98 wt % of one or more C₁-C₃₀-alkyl esters of methacrylic acid; and (c) from approximately 1 to approximately 30 wt % of one or more olefin monomers, selected from a group which consists of (meth)acrylamide monomers, vinylaromatic monomers, vinylcyloalkyl monomers, vinylheterocyclic monomers, vinyl esters of aliphatic acids, vinyl esters of aromatic acids, vinyl esters of heterocyclic acids, maleimide and maleic anhydride, where the alkyl part of the ester in at least one representative selected from (a) or (b) is C₁₀-C₃₀-alkyl. Methods are also proposed for using the said polymer for inhibiting deposition of paraffin from oil.

EFFECT: design of a paraffin deposition inhibitor, which remains liquid at 0°C with up to 50% concentration of the active component.

18 cl, 4 tbl, 10 ex