公开(公告)号：US6013736A

公开(公告)日：2000-01-11

申请号：US24037

申请日：1998-02-16

申请人： Kenneth Floyd Castner

发明人： Kenneth Floyd Castner

IPC分类号： C08F136/06 ,  C08K5/09 ,  C08K5/37 ,  C08L9/00 ,  C08F36/06

CPC分类号： C08K5/09 ,  C08F136/06 ,  C08K5/37

摘要： Various benefits can be attained by utilizing trans-1,4-polybutadiene in tire rubber compounds. For instance, the green strength of tire rubber compounds can be improved by including trans-1,4-polybutadiene therein. The inclusion of trans-1,4-polybutadiene in tire rubber compounds is also beneficial because it is strain crystallizable. However, due to its high melting point, it is normally necessary to heat trans-1,4-polybutadiene in order for it to be processed using conventional mixing equipment. This heating step is typically carried out by storing the trans-1,4-polybutadiene in a "hothouse" for a few days prior to its usage. During this storage period, the polymer typically undergoes undesirable oxidative crosslinking which is caused by residual cobalt catalyst and leads to gelation. In fact, the gelation can render the trans-1,4-polybutadiene unprocessable. This invention is based upon the unexpected finding that certain substituted benzoic acids, such as salicylic acid, thiosalicylic acid and acetylsalicylic acid, will act as metal deactivators in polymers. By utilizing the technique of this invention, residual cobalt and/or other metals, such as nickel, that act as prooxidants in polymers, such as trans-1,4-polybutadiene, can be deactivated. This invention more specifically discloses a stabilized trans-1,4-polybutadiene composition which is comprised of trans-1,4-polybutadiene and a substituted benzoic acid selected from the group consisting of salicylic acid, thiosalicylic acid and acetylsalicylic acid.

摘要翻译： 通过在轮胎橡胶化合物中使用反式1,4-聚丁二烯可以获得各种益处。 例如，通过在其中包含反式-1,4-聚丁二烯可以改善轮胎橡胶化合物的生坯强度。 在轮胎橡胶化合物中包含反式1,4-聚丁二烯也是有益的，因为它是应变可结晶的。 然而，由于其高熔点，通常需要加热反式-1,4-聚丁二烯以便其使用常规的混合设备进行加工。 该加热步骤通常通过在使用之前将反式1,4-聚丁二烯储存在“温室”中几天进行。 在该储存期间，聚合物通常经历由残留的钴催化剂引起的不期望的氧化交联并导致凝胶化。 事实上，凝胶化可使反式1,4-聚丁二烯不能加工。 本发明基于意想不到的发现，某些取代的苯甲酸，如水杨酸，硫代水杨酸和乙酰水杨酸，将作为聚合物中的金属钝化剂起作用。 通过利用本发明的技术，可以使残留的钴和/或在聚合物中充当前氧化物的其它金属（例如镍）如反式-1,4-聚丁二烯失活。 本发明更具体地公开了由反式-1,4-聚丁二烯和选自水杨酸，硫代水杨酸和乙酰水杨酸的取代的苯甲酸组成的稳定的反式-1,4-聚丁二烯组合物。

公开(公告)号：US5733835A

公开(公告)日：1998-03-31

申请号：US692359

申请日：1996-08-05

申请人： Kenneth Floyd Castner

发明人： Kenneth Floyd Castner

IPC分类号： C08F4/60 ,  C08F4/70 ,  C08F36/06 ,  C08F136/06 ,  B01J31/00 ,  B01J37/00 ,  C08F4/02

CPC分类号： C08F136/06 ,  Y10S526/903

摘要： It has been determined that 1,3-butadiene monomer can be polymerized into cis-1,4-polybutadiene rubber utilizing a cobalt-based catalyst system which is comprised of (a) an organocobalt compound, (b) a trialkylaluminum compound and (c) hexafluoro-2-propanol. The use of this catalyst system results in extremely fast rates of polymerization. The molecular weight of the cis-1,4-polybutadiene rubber made utilizing this cobalt-based catalyst system can be regulated by conducting the polymerization in the presence of 1,5-cyclooctadiene. This present invention more specifically discloses a catalyst system which is particularly useful for polymerizing 1,3-butadiene monomer into cis-1,4-polybutadiene, said catalyst system being comprised of (a) an organocobalt compound, (b) a trialkylaluminum compound and (c) hexafluoro-2-propanol. The subject invention further discloses a process for synthesizing cis-1,4-polybutadiene rubber which comprises polymerizing 1,3-butadiene in the presence of (a) an organocobalt compound, (b) a trialkylaluminum compound and (c) hexafluoro-2-propanol.

摘要翻译： 已经确定，使用钴基催化剂体系，可以将1,3-丁二烯单体聚合成顺式-1,4-聚丁二烯橡胶，所述钴基催化剂体系包括（a）有机钴化合物，（b）三烷基铝化合物和（c ）六氟-2-丙醇。 使用该催化剂体系导致极快的聚合速率。 使用该钴基催化剂体系制备的顺式-1,4-聚丁二烯橡胶的分子量可以通过在1,5-环辛二烯的存在下进行聚合来调节。 本发明更具体地公开了一种特别可用于将1,3-丁二烯单体聚合成顺式-1,4-聚丁二烯的催化剂体系，所述催化剂体系包括（a）有机钴化合物，（b）三烷基铝化合物和 （c）六氟-2-丙醇。 本发明还公开了一种合成顺式-1,4-聚丁二烯橡胶的方法，该方法包括在（a）有机钴化合物，（b）三烷基铝化合物和（c）六氟-2- 丙醇。