Flexible polypropylene resins, propylene based elastomer composi

Details Flexible polypropylene resins, propylene based elastomer composi Flexible polypropylene resins, propylene based elastomer composi

1997-12-16

1999-12-14

Wilson, Donald R.

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525240, C08L 2312, C08L 2316

Patent

active

060019336

ABSTRACT:
Disclosed are a flexible polypropylene resin suitable as thermoplastic elastomer, a propylene based elastomer composition containing the flexible polypropylene resin, and a process for producing the above flexible polypropylene resin and the propylene based elastomer composition. The above flexible polypropylene resin is composed of specific boiling heptane-soluble polypropylene and specific boiling heptane-insoluble polypropylene. The above propylene based elastomer composition comprises the above flexible polypropylene resin and an ethylene/propylene copolymer or an ethylene/propylene/polyene copolymer. The above process for the production of olefin polymers may be carried out by non-solvent polymerization methods such as a gas phase one-step polymerization method, and a gas phase multi-step polymerization method, using a specific catalyst.

REFERENCES:
patent: 4490447 (1984-12-01), Battersby
Liberman, "Olefin Polymers (Polypropylene)", Kirk-Othmer Encyclopedia of Chemical Technology, 4th 3d., vol. 17, John Wiley & Sons, NY, p. 787 (1995).

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