摘要:
This invention provides a polybutadiene capable of improving wear resistance and resistance to crack growth in a rubber composition and a tire, wherein values of e, f and g derived from the following determinant (I): 1.7455 0 - 0.0151 - 0.0454 0.4292 - 0.0129 - 0.007 0 0.3746 log 10 a / d log 10 a / b log 10 a / c = e f g (wherein a is a mountain peak value around 1130 cm -1 in a transmittance spectrum through Fourier transform infrared spectroscopy (FT-IR), and b is a valley peak value around 967 cm -1 , and c is a valley peak value around 911 cm -1 , and d is a valley peak value around 736 cm -1 ) satisfy relationships of equation (II): (Calculated value of cis-1,4 bond) = e/(e+f+g)x100 ≥ 99 and equation (III): Calculated value of vinyl bond = g / e + f + g x 100 ≤ 0.
摘要翻译:本发明提供一种能够提高橡胶组合物和轮胎中的耐磨性和抗裂纹生长性的聚丁二烯,其中衍生自以下决定基(I)的e,f和g的值为:1.7455 0-0.0151-0.0454 0.4292-0.0129〜 0.007 0 0.3746 log 10 a / d log 10 a / b log 10 a / c = efg(其中a是通过傅立叶变换红外光谱(FT-IR)的透射光谱中的1130cm -1附近的山峰值,b 是约967cm -1处的谷峰值,c是围绕911cm -1的谷峰值,d是736cm -1附近的谷峰值)满足式(II)的关系:(顺式 -1,4键)= e /(e + f + g)×100‰¥99和等式(III):乙烯基键的计算值= g / e + f + g ¢x 100‰¤0。
摘要:
This invention relates to an aromatic vinyl compound-conjugated diene compound copolymer capable of giving excellent wear resistance and resistance to wet skid to a tire, and more particularly to an aromatic vinyl compound-conjugated diene compound copolymer obtained by an addition polymerization of an aromatic vinyl compound and a conjugated diene compound in the presence of a polymerization catalyst composition comprising at least one specified metallocene complex selected from the group consisting of a metallocene complex represented by the following general formula (I):
(wherein M is a lanthanoid element, scandium or yttrium, and Cp R is independently a non-substituted or substituted indenyl, and R a to R f are independently an alkyl group having a carbon number of 1-3 or a hydrogen atom, and L is a neutral Lewis base, and w is an integer of 0-3) and so on, wherein a content of cis-1,4 bond in a conjugated diene compound portion is not less than 80%.
摘要:
The method for producing a modified conjugated diene based (co)polymer, according to the present invention comprises a step (a) for obtaining a primarily modified polymer by conducting a primary modification reaction wherein at least one member selected from the group consisting of an alkoxysilane compound and a silanol compound is introduced into the active alkali metal terminal of a conjugated diene based (co)polymer having an active alkali metal terminal, and a step (b) for obtaining a secondarily modified polymer (a modified conjugated diene based (co)polymer) by subjecting the above-obtained primarily modified polymer to reactions including the following step (b1) and step (b2), and can produce a conjugated diene based (co)polymer having a high Mooney viscosity and excellent shape stability. Step (a): a reaction with a condensation accelerator containing a metal element. Step (b): a reaction with at least one member selected from the group consisting of inorganic acids and metal halides.
摘要:
The method for producing a modified conjugated diene based (co)polymer, according to the present invention comprises a step (a) for obtaining a primarily modified polymer by conducting a primary modification reaction wherein at least one member selected from the group consisting of an alkoxysilane compound and a silanol compound is introduced into the active alkali metal terminal of a conjugated diene based (co)polymer having an active alkali metal terminal, and a step (b) for obtaining a secondarily modified polymer (a modified conjugated diene based (co)polymer) by subjecting the above-obtained primarily modified polymer to reactions including the following step (b1) and step (b2), and can produce a conjugated diene based (co)polymer having a high Mooney viscosity and excellent shape stability. Step (a): a reaction with a condensation accelerator containing a metal element. Step (b): a reaction with at least one member selected from the group consisting of inorganic acids and metal halides.
摘要:
A process for producing a modified conjugated diene-based copolymer comprising bringing a modifier into reaction with the active end of a copolymer of a conjugated diene compound and an aromatic vinyl compound having the active end, wherein a compound having (i) a hydrolyzable functional group having silicon and (ii) a group which can be converted into a protonic amino group or a protonic amino group protected with an eliminable functional group after the reaction is used as the modifier, a step of adding a condensation catalyst is conducted after the modifier is brought into the reaction, and the content of the unit of the aromatic vinyl compound and the structure of the chain of the aromatic vinyl compound are specified. The process provides a modified conjugated diene-based copolymer which is a modified product of a copolymer of a conjugated diene and an aromatic vinyl compound, provides excellent interaction between the rubber component and carbon black and/or silica, can further improve dispersion of the fillers and provides a tire exhibiting excellent low heat buildup property, fracture properties and abrasion resistance.
摘要:
There are provided a rubber composition simultaneously improving low loss factor and wear resistance as compared with the conventional ones as well as a tire using such a rubber composition. The invention lies in a rubber composition using a modified conjugated diene rubber and being excellent in the low loss factor and wear resistance as well as a tire. The rubber composition of the invention is formed by compounding a filler to a rubber component containing (A) a modified conjugated diene rubber having a cis-bond content in conjugated diene portion of not less than 87% and a vinyl bond content of not more than 2% and containing a functional group reactive with a filler and (B) a modified polymer having a modifying functional group number per 1 molecule of an unmodified polymer of not less than 0.6.
摘要:
There are provided a rubber composition simultaneously improving low loss factor and wear resistance as compared with the conventional ones as well as a tire using such a rubber composition. The invention lies in a rubber composition using a modified conjugated diene rubber and being excellent in the low loss factor and wear resistance as well as a tire. The rubber composition of the invention is formed by compounding a filler to a rubber component containing (A) a modified conjugated diene rubber having a cis-bond content in conjugated diene portion of not less than 87% and a vinyl bond content of not more than 2% and containing a functional group reactive with a filler and (B) a modified polymer having a modifying functional group number per 1 molecule of an unmodified polymer of not less than 0.6.