COMPOSITION OF BOUND HIGH MOLECULAR WEIGHT BLOCK COPOLYMERS Russian patent published in 2011 - IPC C08L53/02 C08F297/04 

FIELD: chemistry.

SUBSTANCE: described is a composition of bound high molecular weight block copolymers for making compounds, moulded articles and oil gels, containing: (a) a linear di-block copolymer (I) of general formula (A-B), having maximum apparent molecular weight between 230000 and 275000, (b) a linear double-beam block copolymer (II) of general formula (A-B)₂X, (c) a three-beam block copolymer (III) of general formula (A-B)₃X, (d) greater than the three-beam block copolymer (IV) of general formula (A-B)_n>3X, (e) secondary polymer structures mainly based on monovinylaromatic hydrocarbons having maximum apparent molecular weight less than that of the linear di-block copolymer (I), where A is a block of mainly poly(monovinylaromatic hydrocarbons), and where content of poly(monovinylaromatic hydrocarbons) lies between 20 and 35 wt %; where B is a block of mainly poly(conjugated diene); where X is a residue of a trifunctional and/or tetrafunctional binding agent; where the composition of block copolymers has weight-average molecular weight Mw between 450000 and 800000, and where relative amounts of block copolymers are as follows: I between 5 and 15 wt %; II and III together between 70 and 90 wt %, where III is more than 10 wt %; IV ranges from more than 0 to less than 10 wt % and secondary polymer structures range from more than 0 to less than 10 wt %, respectively, relative the weight of the all the composition of block copolymers, in which the sum of the components is equal to 100%. The invention also describes a method of obtaining the composition of bound block copolymers. Described also are moulded articles and gels, obtained from the composition of bound block copolymers.

EFFECT: obtaining a composition of bound block copolymers with high molecular weight and low viscosity.

12 cl, 13 tbl, 6 ex