composition of tire balancing gel, automobile tire, automobile wheel assembly and method for balancing a motor vehicle wheel assembly

摘要

tire balancing gel composition, automobile tire, automobile wheel assembly and method for balancing a motor vehicle wheel assembly the present invention relates to viscoelastic tire balancing compositions comprising: 1) 85 a 97% by weight of a glycol ether component comprising one or more ethylene / propylene glycol copolymer ethers of general (i) or general (ii) or mixtures thereof: ro {[ch (ch3) ch2-o- ] m [ch2-ch2-o-] n} h (i) r1- (o - {[ch (ch3) ch2-o-] m [ch2-ch2-o-] n} h) 2 (ii) in that: r is hydrogen or an alkyl group of 2-8 carbon atoms; r1 is an alkylene moiety of 2-8 carbon atoms in which the two substituents are not present on the same carbon atom; m is the molar percentage of propylene glycol in the ethylene / propylene glycol copolymer portion or portions; and n is the molar percentage of ethylene glycol in the ethylene / propylene glycol copolymer portion or portions, where the n: m ratio is in the range 35:65 to 80:20; each glycol copolymer compound with a numerical average molecular weight in the range of 2,000-10,000; and 2) 3 to 15% by weight of a fumed silica gel former; said balancing compositions being viscoelastic and with a storage module (g ') between 1,500 pa and 5,000 pa at 22 ° c, a loss module (g' ') less than the storage module up to a crossing frequency of 10 -40 Hz, and a critical tensile strength exceeding 2 pa.