Propylene block copolymers

Details Propylene block copolymers Propylene block copolymers

1980-09-12

1982-06-08

Michl, Paul R.

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

Synthetic resins

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

525323, C08F25508

Patent

active

043340407

ABSTRACT:
A propylene block copolymer comprising propylene, ethylene and a straight-chain .alpha.-olefin of 5 to 12 carbon atoms is characterized in that: its limiting viscosity is 0.3 to 15 dl/g (at 135.degree. C., in decalin); it comprises specified quantities of these monomers; and when it is subjected to successive extraction with o-dichlorobenzene at 40.degree. C. and 80.degree. C., the quantities, fusion peak temperatures, and content of the .alpha.-olefin of the resulting fractions are respectively within specific limits of values.

REFERENCES:
patent: 3480696 (1969-11-01), Hassell
patent: 3509056 (1970-04-01), Shepherd
patent: 3853969 (1974-12-01), Kontos
patent: 4039632 (1977-08-01), Edmonds

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