Process for the synthesis of elastomeric polypropylene

Details Process for the synthesis of elastomeric polypropylene Process for the synthesis of elastomeric polypropylene

1994-11-25

1998-04-28

Wu, David W.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Removing and recycling removed material from an ongoing...

526 68, 526 69, 526 70, 526 88, 5263482, 5263485, 526351, 526904, 422135, 422136, C08F 206

Patent

active

057445559

ABSTRACT:
A process for the production of elastomeric polypropylene is disclosed. The process entails contacting the propylene monomer neat or in an unreactive hydrocarbon solvent, with a catalyst in a recirculated, stirred reactor at a temperature of about 60.degree. to 80.degree. C. thereby producing elastomeric polypropylene. The reactor contents are in the slurry/solution phase and are essentially free of catalyst poisons. The reactor is capable of recirculating contents that are very viscous such that the reactor contents are well mixed while a portion of the contents of the reactor containing propylene, any solvent, and elastomeric polypropylene are continually removed by the use of a high viscosity pump to recover the elastomeric polypropylene.

REFERENCES:
patent: 4228263 (1980-10-01), Howard, Jr. et al.
patent: 5205175 (1993-04-01), Garza et al.
patent: 5207225 (1993-05-01), Oaks et al.
patent: 5318027 (1994-06-01), Fukui
patent: 5328666 (1994-07-01), Amano et al.

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