发明名称 |
Vapor phase synthesis of rubbery polymers |
摘要 |
<p>By utilizing the vapor phase polymerization techniques of the present invention, numerous distinct and highly beneficial advantages are realized. For instance, cis-1,4-polyisoprene rubber and high cis-1,4-polybutadiene rubber having a consistent and controllable molecular weight can be easily and practically prepared without utilizing a solvent. The subject invention more specifically discloses a method for vapor phase polymerizing isoprene into cis-1,4-polyisoprene in a process comprising the steps of: (1) charging into a reaction zone said isoprene and a preformed catalyst system which is made by reacting an organoaluminum compound with titanium tetrachloride, preferably in the presence of at least one ether; wherein the isoprene is maintained in the vapor phase in said reaction zone by a suitable combination of temperature and pressure; (2) allowing said isoprene to polymerize into cis-1,4-polyisoprene at a temperature within the range of about 35 DEG C to about 70 DEG C; and (3) withdrawing said cis-1,4-polyisoprene from said reaction zone. It has been determined that gel formation can be reduced by conducting the polymerization of isoprene monomer in the presence of a diarylamine, such as para-styrenated diphenylamine. <IMAGE></p> |
申请公布号 |
EP1116729(A2) |
申请公布日期 |
2001.07.18 |
申请号 |
EP20010109368 |
申请日期 |
1996.08.02 |
申请人 |
THE GOODYEAR TIRE & RUBBER COMPANY |
发明人 |
CALDERON, NISSIM;CASTNER, KENNETH FLOYD;COLVIN, HOWARD ALLEN;MUSE, JOEL JR. |
分类号 |
B01J8/10;B01J8/24;B01J8/36;B01J8/38;C08F2/34;C08F2/44;C08F4/70;C08F36/04;C08F136/04;C08F136/06;C08F136/08;C08K5/18;(IPC1-7):C08F2/34 |
主分类号 |
B01J8/10 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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