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    • 3. 发明授权
    • Tire tread compound made with strain crystallizable 3,4-polyisoprene
    • 用应变结晶的3,4-聚异戊二烯制成的轮胎胎面复合材料
    • US5356997A
    • 1994-10-18
    • US968916
    • 1992-10-30
    • Johnny D. Massie, IIWen-Liang HsuAdel F. HalasaPaul H. Sandstrom
    • Johnny D. Massie, IIWen-Liang HsuAdel F. HalasaPaul H. Sandstrom
    • C08F4/60C08F4/70C08F36/08C08F136/08C08L9/00
    • C08F136/08C08F2410/01Y10S152/905
    • Strain crystallizable 3,4-polyisoprene having a 3,4-microstructure content which is within the range of about 65% to about 85%, a cis-1,4-microstructure content which is within the range of about 15% to about 35%, and essentially no trans-1,4-microstructure or 1,2-microstructure can be synthesized in organic solvents to quantitative yields after short polymerization times by utilizing the catalyst systems of this invention. This invention specifically discloses a process for the synthesis of 3,4-polyisoprene which comprises polymerizing isoprene monomer in an organic solvent at a temperatIre which is within the range of about -10.degree. C. to about 100.degree. C. in the presence of a catalyst system which is comprised of (a) an organoiron compound which is soluble in the organic solvent, wherein the iron in the organoiron compound is in the +3 oxidation state, (b) a partially hydrolyzed organoaluminum compound which was prepared by adding a protonic compound selected from the group consisting of water, alcohols and carboxylic acids to the organoaluminum compound, and (c) a chelating aromatic amine; wherein the molar ratio of the chelating amine to the organoiron compound is within the range of about 0.1:1 to about 1:1, wherein the molar ratio of the organoaluminum compound to the organoiron compound is within the range of about 5:1 to about 200:1, and wherein the molar ratio of the protonic compound to the organoaluminum compound is within the range of about 0,001:1 to about 0.2:1.
    • 具有3,4-微结构含量在约65%至约85%范围内的应变可结晶的3,4-聚异戊二烯,顺式-1,4-微结构含量在约15%至约35的范围内 通过利用本发明的催化剂体系,在短时间聚合时间之后,可以在有机溶剂中基本上没有反式-1,4-微结构或1,2-微结构合成定量产率。 本发明具体公开了一种合成3,4-聚异戊二烯的方法,该方法包括在有机溶剂中将异戊二烯单体在约-10℃至约100℃范围内的温度下聚合, 催化剂体系,其由(a)可溶于有机溶剂的有机铁化合物组成,其中有机铁化合物中的铁处于+3氧化态,(b)部分水解的有机铝化合物,其通过加入质子 选自水,醇和羧酸的化合物的有机铝化合物的化合物,和(c)螯合芳族胺; 其中螯合胺与有机铁化合物的摩尔比在约0.1:1至约1:1的范围内,其中有机铝化合物与有机铁化合物的摩尔比在约5:1至约 200:1,其中质子化合物与有机铝化合物的摩尔比在约0.001:1至约0.2:1的范围内。