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    • 6. 发明授权
    • Telechelic polymers are produced by ozonation degradation of diene polymers
    • 通过二烯聚合物的臭氧化降解产生远端聚合物
    • US06420490B1
    • 2002-07-16
    • US09448664
    • 1999-11-24
    • Donn Anthony DuBois
    • Donn Anthony DuBois
    • C08F832
    • C08F8/32C08C19/04C08F8/04C08F8/06
    • A low molecular weight, telechelic polymer containing polar internal functionality is produced by (a) treating a copolymer of a polar alpha olefin and a conjugated diene with ozone to degrade the copolymer and form polymer segments which have aldehyde or ketone groups on the chain ends, wherein the copolymer has a random distribution of predominantly 1,4-diene double bonds and the pendant functional groups of the polar alpha olefin are stable to ozone, and (b) further reacting the aldehyde or ketone end groups to provide terminal functionality. The terminal functionality which can be provided includes carboxylic acid groups, primary hydroxyl groups, and amide groups.
    • 通过(a)用臭氧处理极性α-烯烃和共轭二烯的共聚物来降解共聚物并形成在链端具有醛基或酮基的聚合物链段,从而产生含有极性内部官能团的低分子量遥爪聚合物, 其中所述共聚物具有主要为1,4-二烯双键的无规分布,并且极性α-烯烃的侧链官能团对臭氧是稳定的,和(b)使醛或酮端基进一步反应以提供末端官能团。 可以提供的末端官能团包括羧酸基团,伯羟基基团和酰胺基团。