FIELD: chemistry.
SUBSTANCE: method for preparing the bound polymer comprises the steps of: (i) polymerizing a conjugated diene monomer and optionally a copolymerizable monomer thereto to produce a polymer containing a reactive end group; (ii) reacting the reactive end group of the polymer with a polyisocyanate having an amount of functional groups of X to form an intermediate polymeric product; and (iii) reacting mentioned intermediate polymer product with a polyol having a functional group number of Y with a bound polymer product, wherein X+Y≥5. A bound polymer and a tire component are also claimed.
EFFECT: obtained polymers exhibit greater resistance to cold flow, have good technological properties of cured mixtures.
18 cl, 4 tbl
