Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Patent
1983-04-29
1986-07-29
Smith, Edward J.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
502108, 502126, 526114, 526116, 526119, 526122, 526139, 526140, 526141, 526351, 526903, 526904, C08F 402, C08F 1000
Patent
active
046031847
ABSTRACT:
A process for producing .alpha.-olefin polymers is proposed wherein the catalyst prepared and used therein is superior in the shelf stability and heat stability. The process comprises reacting TiCl.sub.4 with a reaction product (I) of an organoaluminum compound with an electron donor to obtain a solid product (II), which is then subjected to polymerization treatment with an .alpha.-olefin, and further reacted with an electron donor and an electron acceptor to obtain a solid product (III), which is then combined with an organoaluminum compound, to obtain a catalyst, in the presence of which .alpha.-olefin(s) are polymerized. The catalyst can be further preactivated with an .alpha.-olefin in advance of its use for the polymerization.
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patent: 4309521 (1982-01-01), Sato et al.
patent: 4368304 (1983-01-01), Sato et al.
patent: 4420593 (1983-12-01), Sato et al.
patent: 4460757 (1984-07-01), Sato et al.
Higuchi Yoshiharu
Matsuda Kenji
Sato Akihiro
Tachibana Masami
Uwai Toshihiro
Chisso Corporation
Philpitt Fred
Smith Edward J.
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