Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1989-09-15
1990-12-18
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...
525249, 525256, 525259, 525262, 525268, 525323, 525 53, C08F29708
Patent
active
049787225
ABSTRACT:
A method for producing a propylene-.alpha.-olefin block copolymer, which comprises polymerizing propylene in the presence of a catalyst and then polymerizing in a gas phase an .alpha.-olefin other than propylene, or propylene and other .alpha.-olefin without deactivating the catalyst, wherein at least one compound selected from the group consisting of an aromatic carboxylic acid ester, a phosphorous ester, an unsaturated dicarboxylic acid diester, an amine compound and an amide compound, is supplied to the latter gas phase polymerization system.
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Allowed claims of Taiwan Publication No. 42779 (8/81).
Goko Nobuaki
Kato Hideshige
Matsuda Yukimasa
Uehara Yumito
Mitsubishi Kasei Corporation
Seccuro Carman J.
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