Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Patent
1982-07-29
1984-07-17
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, 526116, 526122, 526127, 526136, 526137, 526139, 526140, 526141, 526142, 526158, 526159, 526904, 525268, C08F 464, C08F 1000
Patent
active
044607571
ABSTRACT:
A process for producing highly crystalline .alpha.-olefin polymers of good particle form with high yield is provided, which comprises polymerizing .alpha.-olefin in the presence of a preactivated catalyst obtained by reacting a reaction product (I) of organoaluminum compound (A.sub.1) with electron donor (B.sub.1), with TiCl.sub.4 to obtain a solid product (II); further reacting (II) with electron donor (B.sub.2) and electron acceptor to obtain a solid product (III); during or/and after the reaction step for obtaining (II) or/and during or/and after the reaction step for obtaining (III), subjecting (II) or (III), to polymerization treatment with .alpha.-olefin; and combining the resulting final solid product with organo-aluminum compound (A.sub.2) and a reaction product (G) of organo-aluminum compound (A.sub.3) with electron donor (B.sub.3) to obtain a preactivated catalyst; and preferably, in this combination, further subjecting a part or the total of the catalyst to polymerization treatment with .alpha.-olefin in the presence of the final solid product and (A.sub.2) to obtain another preactivated catalyst. The catalyst has a superior storage stability and heat stability.
REFERENCES:
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patent: 4235747 (1980-11-01), Leung
patent: 4295991 (1981-10-01), Wristers
patent: 4309521 (1982-01-01), Sato et al.
patent: 4329251 (1982-05-01), Sunada et al.
patent: 4330433 (1982-05-01), Wristers
Higuchi Yoshiharu
Matsuda Kenji
Sato Akihiro
Tachibana Masami
Uwai Toshihiro
Chisso Corporation
Philpitt Fred
Smith Edward J.
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