Process for shaping solid polybut-1-ene and the resulting shaped

Details Process for shaping solid polybut-1-ene and the resulting shaped Process for shaping solid polybut-1-ene and the resulting shaped

1982-01-13

1983-11-22

Wong, Jr., Harry

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C08F11008

Patent

active

044170416

ABSTRACT:
Shaped articles of polybut-1-ene are made by preheating a polymer blank in the crystalline form II at a temperature between 20.degree. and 90.degree. C. The preheated blank is then press-forged under a pressure between 8 and 100 kgf/mm.sup.2 for a period of 1-40 seconds. During the shaping operation, the polymer is converted into the crystalline form I. Polybut-1-ene shaped articles are formed that have a melting peak, determined by differential thermal analysis, at 119.degree. C.

REFERENCES:
patent: 3175999 (1965-03-01), Natta et al.
patent: 3265648 (1966-08-01), Boor et al.
patent: 3435017 (1969-03-01), Natta et al.
patent: 3686388 (1972-08-01), Beckmann et al.
patent: 3846522 (1974-11-01), Goldman
patent: 4187158 (1980-02-01), Mack
patent: 4219639 (1980-08-01), Mack et al.
Ball et al., Solid-State Extrusion of Poly (1-butene), 15 Polymer Letters Edition, pp. 519-526 (1977).

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