Process for manufacturing olefin polymers and products prepared

Details Process for manufacturing olefin polymers and products prepared Process for manufacturing olefin polymers and products prepared

1994-03-24

1996-02-27

Seccuro, Jr., 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...

525 53, 525 54, 525197, 525240, C08L 2304, C08L 2310, C08L 2318

Patent

active

054949653

ABSTRACT:
A process for manufacturing bimodal olefin polymers and copolymers having a ratio between low molecular weight fractions within the range of 40:60-70:30, by mixing under shear conditions 5-50 percent by weight of a low molecular weight unimodal polyolefin having a molecular weight (Mw) between 15,000-30,000, and 95-50 percent by weight of a bimodal polyolefin having a ratio between low molecular weight fractions and high molecular weight fractions within the range of 30:70-55:45. According to a preferred embodiment, there is used a multi-phase process including a loop reactor followed by a gas-phase reactor, wherein a part of the product coming out from the loop reactor is separated and combined with the bimodal product coming out from the gas-phase reactor.

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patent: 4336352 (1982-06-01), Sakurai et al.
patent: 4550143 (1985-10-01), Tanaka et al.
patent: 4617352 (1986-10-01), Page et al.
patent: 5149738 (1992-09-01), Lee et al.
patent: 5189106 (1993-02-01), Morimoto et al.
Ency. Pol. Sci & Eng. -vol. 6, pp. 436-440-1986.
Derwent Abstract of JP 89 22 1003, Aug., 1989.
Derwent Abstract of JP 89 22 1002, Aug., 1989.

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