Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1991-08-13
1993-01-26
Schoefer, Joseph L.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
525270, 525320, C08F25500
Patent
active
051823306
ABSTRACT:
In the copolymerization of 4-methyl-1-pentene and at least one alpha olefin under batch polymerization conditions at a temperature of at least about 50.degree. C. wherein 4-methyl-1-pentene is initially polymerized in the absence of comonomer and then comonomer is added to the reaction vessel to permit copolymer formation, the improvement comprising initially forming 4-methyl-1-pentene homopolymer in an amount sufficient to reduce the solubility of the later formed copolymer at the polymerization temperature, said homopolymer being no more than about 5 weight percent of the end product copolymer. Also the products of such polymerizations are disclosed.
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Hasenberg Daniel M.
Rooney Patrick
Stricklen Phil M.
Bowman Edward L.
Phillips Petroleum Company
Schoefer Joseph L.
Wu David
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