FIELD: chemistry of polymers, more particularly hybrid copolymer as addition agent to oils. SUBSTANCE: present invention describes method of preparation of copolymer by polymerization of one or more vinyl monomers to form polymer substrate followed by graft polymerization of nitrogen-containing monomer to polymer substrate to obtain mixture of grafted copolymer and static nitrogen-containing copolymer. Vinyl monomer is selected from group consisting of acrylates, methacrylates, styrene and derivatives thereof, maleates, rumarates and functionalized maleic anhydride. EFFECT: more efficient preparation method. 13 cl, 2 tbl
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| HYBRID COPOLYMER | 1990 |
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