Random copolymer of propylene and 1-butene and process for its p

Details Random copolymer of propylene and 1-butene and process for its p Random copolymer of propylene and 1-butene and process for its p

1977-12-19

1979-09-18

Smith, Edward J.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

252429B, 252429C, 526 97, 526122, 526124, 526125, 526151, 526904, 526906, C08F 402, C08F 1006

Patent

active

041683617

ABSTRACT:
A random copolymer consisting essentially of 40 to 90 mole% of propylene and 60 to 10 mole% of 1-butene, and having (A) a boiling n-heptane-insoluble content of not more than 5% by weight based on the weight of the copolymer, (B) a boiling methyl acetate-soluble content of not more than 2% by weight based on the weight of the copolymer, (C) a melting point, determined by differential thermal analysis, of 40 to 140.degree. C., (D) an intrinsic viscosity, determined in decalin at 135.degree. C., of 0.5 to 6 dl/g, (E) an elongation at break, measured by JIS K6301, of at least 300%, (F) a tensile strength at break, measured by JIS K6301, of at least 50 kg/cm.sup.2, and (G) a haze, measured by JIS K6714, of not more than 40%.
The above copolymer has superior properties for production of various kinds of melt-shaped articles such as films, sheets, vessels and tubes, and can be obtained by copolymerizing propylene and 1-butene in the presence of a catalyst prepared from a solid complex containing magnesium, titanium and halogen, an organometal compound of a metal of Groups I to III of the periodic table, and an electron donor.

REFERENCES:
patent: 3238146 (1966-03-01), Hewett et al.
patent: 3278504 (1966-10-01), Eills et al.
patent: 3332921 (1967-07-01), Cleary
patent: 3923758 (1975-12-01), Carter et al.

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