MIXTURE OF FUNCTIONALISED POLYMERS FOR TIRES Russian patent published in 2020 - IPC C08C19/20 C08C19/22 C08C19/25 C08C19/44 C08L9/06 B60C1/00 

FIELD: chemistry.

SUBSTANCE: invention relates to a mixture of polymers. Described is a mixture of polymers suitable for making a tire, a tire tread, a tire sidewall, a conveyor belt, a seal or a sleeve, consisting of (a) 60 to 96 wt % first elastomeric polymer, (b) from 4 to 35 wt % a second polymer and optionally (c) from 0 to 13 wt % one or more filler oil(s); wherein the first elastomeric polymer can be obtained (I) by anionic polymerisation of at least one conjugated diene monomer and optionally one or more α-olefin monomer(s) in the presence of a polymerisation initiator in an organic solvent and, optionally, (II) a modification of the polymer chain ends obtained in step (I) by adding and reacting at least one compound represented by any of formulas (1) to (3) or (11) to (15), as defined below; wherein the second elastomeric polymer can be obtained (i) by anionic polymerisation in the presence of a polymerisation initiator in an organic solvent (i-1) of at least one conjugated diene monomer or (i-2) at least one monomer of conjugated diene and one or more α-olefin monomer(s) or (i-3) at least one or more α-olefin monomer(s) and (ii) modification of chain ends of the polymer obtained in step (i), by adding and reacting at least one compound represented by any of formulas (1), (3) or (11) to (15), as defined below, provided that in corresponding formulas each of x, x_1', r₄, t₁ and v is selected from 1 and 2; wherein first elastomeric polymer (a) has number-average molecular weight (M_n) from 400000 to 2000000 g/mol and weighted average molecular weight (M_w) from 500000 to 3000000 g/mol; wherein second elastomeric polymer (b) has number-average molecular weight (M_n) from 500 to 80000 g/mol and weight-average molecular weight (M_w) from 500 to 100000 g/mol; and wherein the amounts of components (a), (b) and (c) are relative to the total weight of the mixture of polymers; (R***O)_x(R**)_ySi-A-S-SiR**₃ formula (1), wherein each of R** is independently selected from C₁-C₁₆ alkyl or alkylaryl; R*** is independently selected from C₁-C₄ alkyl; A is selected from C₆-C₁₈ aryl, C₇-C₅₀ alkylaryl, C₁-C₅₀ alkyl and C₂-C₅₀ dialkyl ester; and, optionally, R**, R***, or A can independently be substituted with one or more groups selected from C₁-C₄ alkyl, C₁-C₄ alkoxy, C₆-C₁₂ aryl, C₇-C₁₆ alkylaryl, di(C₁-C₇ hydrocarbyl)amino, bis(tri(C₁-C₁₂ alkyl)silyl)amino, tris(C₁-C₇ hydrocarbyl)silyl and C₁-C₁₂ thioalkyl; x is an integer selected from 1, 2 and 3; y denotes an integer selected from 0, 1 and 2; provided that x+y=3; ((R¹O)_x2'(R²)_y2'Si-R³-S)_s2'M*(R⁴)_t2'(X*)_u2' formula (2), where M* denotes silicon or tin; x2' denotes an integer selected from 1, 2 and 3; y2' denotes an integer selected from 0, 1 and 2; where x2'+ y2'=3; s2' denotes an integer selected from 2, 3 and 4; t2' denotes an integer selected from 0, 1 and 2; u2' denotes an integer selected from 0, 1 and 2; where s2'+t2'+u2'=4; R¹ is independently selected from hydrogen and (C₁-C₆) alkyl; R² is independently selected from (C₁-C₁₆) alkyl, (C₇-C₁₆) alkylaryl and (C₇-C₁₆) arylalkyl; R³ is at least bivalent and is independently selected from (C₁-C₁₆) alkyl, (C₈-C₁₆) alkylarylalkyl, (C₇-C₁₆) arylalkyl and (C₇-C₁₆) alkylaryl; and each group can be substituted with one or more of the following groups: tertiary amino group, silyl group, (C₇-C₁₈) aralkyl group and (C₆-C₁₈) aryl group; R⁴ is independently selected from (C₁-C₁₆) alkyl and (C₇-C₁₆) alkylaryl; X* is independently selected from chloride, bromide and -OR^5*; where R^5* is selected from (C₁-C₁₆) alkyl and (C₇-C₁₆) arylalkyl; (R_IO)_x1'(R_II)_y1'Si-R_IV-S-E formula (3), where R_I and R_II are independently selected from C₁-C₈ alkyl or C₁-C₄ alkoxy, with the proviso that at least one of R_I and R_II denotes C₁-C₄ alkoxy; x1' denotes an integer selected from 1, 2 and 3; y1' denotes an integer selected from 0, 1 and 2; R_IV is selected from C₁-C₈ alkyl; and E is R_V or compound of formula (3a):

formula (3a),

where R_V is C₁-C₆ alkyl, C₆-C₁₂ aryl, C₇-C₁₆ alkylaryl or C₇-C₁₆ arylalkyl;

formula (11),

where each R^1d is independently selected from (C₁-C₁₆) alkyl; each R^2d is independently selected from (C₁-C₁₆) alkyl, (C₆-C₁₈) aryl and (C₇-C₁₈) aralkyl; R^3d is independently selected from bivalent (C₁-C₁₆) alkyl, divalent (C₆-C₁₈) aryl, divalent (C₇-C₁₈) aralkyl and -R^4d-OR^5d-, where R^4d and R^5d are independently selected from divalent (C₁-C₆) alkyl; and Z^d is independently selected from (C₁-C₁₆) alkyl, (C₆-C₁₈) aryl, (C₇-C₁₈) aralkyl, (C=S)-SR^6d, where R^6d is selected from (C₁-C₁₆) alkyl, (C₆-C₁₈) aryl and (C₇-C₁₈) aralkyl and M^1d(R^7d)_c4(R^8d)_d4, where M^1d is silicon or tin, each R^7d is independently selected from (C₁-C₁₆) alkyl, (C₆-C₁₈) aryl and (C₇-C₁₈) aralkyl; each R^8d is independently selected from -S-R^3d-Si(OR^1d)_r4(R^2d)_s4, where R^1d, R^2d and R^3d correspond to the above definitions, r₄ denotes an integer independently selected from 1, 2 and 3, and s₄ denotes an integer independently selected from 0, 1 and 2, wherein r₄+s₄=3; c₄ denotes an integer independently selected from 2 and 3; d₄ denotes an integer independently selected from 0 and 1; and c₄+d₄=3;

formula (12),

where R^9e, R^10e, R^11e and R^12e are independently selected from hydrogen, (C₁-C₁₆) alkyl, (C₆-C₁₆) aryl and (C₇-C₁₆) aralkyl, preferably N-methyl-pyrrolidone;

formula (13)

formula (14),

where each R^13a, R^14a, R^18a and R^19a is independently selected from (C₁-C₁₆) alkyl; R^15a and R^20a are independently selected from divalent (C₁-C₁₆) alkyl, divalent (C₆-C₁₈) aryl, divalent (C₇-C₁₈) aralkyl and -R^24a-O-R^25a-, where R^24a and R^25a are independently selected from divalent (C₁-C₆) alkyl; R^16a and R^17a are independently selected from (C₁-C₁₆) alkyl and -SiR^26aR^27aR^28a, where R^26a, R^27a and R^28a are independently selected from (C₁-C₁₆) alkyl, (C₆-C₁₈₎ aryl and (C₇-C₁₈) alkylaryl; each R^21a and R^22a is independently selected from (C₁-C₁₆) alkyl, (C₆-C₁₈) aryl and (C₇-C₁₈) alkylaryl; each R^23a is independently selected from hydrogen and (C₁-C₆) alkyl; t₁ and v denote integers independently selected from 1, 2 and 3; u₁ and w denote integers independently selected from 0, 1 and 2; t₁+u₁=3 and v+w=3;

formula (15),

where each R²⁹ and R³⁰ is independently selected from (C₁-C₁₆) alkyl, (C₆-C₁₈) aryl, (C₇-C₁₈) alkylaryl and vinyl; and x₁₀ denotes an integer selected from range from 1 to 6. Invention also describes a polymer composition, a method of preparing a cross-linked elastomeric polymer, a cross-linked elastomeric polymer, a part, use of a mixture of polymers, a set of polymers.

EFFECT: technical result is high strength and wear resistance in obtained tire products.

14 cl, 2 tbl, 5 ex