Thermoplastic filled membranes of propylene copolymers

Details Thermoplastic filled membranes of propylene copolymers Thermoplastic filled membranes of propylene copolymers

2006-04-11

2006-04-11

Harlan, Robert D. (Department: 1713)

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

Synthetic resins

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

Reexamination Certificate

active

07026403

ABSTRACT:
The invention relates to a thermoplastic membrane (e.g. film, fluid barrier, and the like) which is formed from a blend of:a) a first polymer component (FPC), wherein said FPC comprises a propylene-ethylene copolymer containing from 80 to 93 percent by weight of units derived from propylene, and having a melting point derived from stereoregular polypropylene sequences, as determined by differential scanning calorimetry (DSC), in the range of from 25° C. to 70° C., and a heat of fusion of from 2 J/g to 25 J/g;b) an inorganic filler;c) a processing oil, andd) optionally, a second polymer component (SPC), wherein said SPC is a stereoregular polypropylene containing less than 7 percent by weight of units derived from ethylene or alpha-olefin monomer containing from 4 to 8 carbon atoms and having melting point, as determined by DSC, greater than 130° C., and a heat of fusion greater than 80 J/g.

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