Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1989-10-24
1991-10-29
Seccuro, Carman J.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
525247, 525321, C08L 5300, C08L 2310, C08L 2318, C08F29708
Patent
active
050617559
ABSTRACT:
A highly crystalline propylene polymer composition which is obtained by preliminarily polymerizing, in the presence of a catalyst comprising a solid titanium trichloride catalyst complex containing a complexing agent and having an aluminum content of at most 0.15 by atomic ratio of aluminum to titanium and an organoaluminum compound and optionally an electron donative compound, 3-methylbutene-1 in an amount exceeding 10 g per g of the solid titanium trichloride catalyst complex and then polymerizing propylene, or propylene and other .alpha.-olefin having from 2 to 18 carbon atoms, in an amount of at least 500 g per g of the solid titanium trichloride catalyst complex, and which contains from 0.01 to 20% by weight of the 3-methylbutene-1 polymer based on the total weight of the 3-methylbutene-1 polymer-containing propylene polymer composition.
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patent: 4210729 (1980-07-01), Hermans et al.
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patent: 4210738 (1980-07-01), Hermans et al.
patent: 4551501 (1985-11-01), Shiga et al.
patent: 4603174 (1986-07-01), Okada et al.
WPIL, File Supplier, AN=86--221342, Derwent Publications Ltd, London, GB; & JP-A-61 151 204 (IDEMITSU PETROCHEM.) 09-07-1986 *whole abstract*.
WPIL, File Supplier, AN--88--124332, Derwent Publications Ltd, London, GB; & JP-A-63 069 809 (Mitsui Toatsu Chemical) 29-03-1988.
FR-A-1 434 150 (Imperial Chemical Inductries)*p. 1, left-hand column, lines 23-29; p. 2, left-hand column, lines 6-35; p. 2, left-hand column, lines 1-4*.
Isobe Eiji
Katou Hidehito
Maruyama Yasuo
Suga Yoshinori
Tanaka Eiji
Mitsubishi Kasei Corporation
Seccuro Carman J.
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