Molded articles of syndiotactic polypropylene and method for...

Details Molded articles of syndiotactic polypropylene and method for... Molded articles of syndiotactic polypropylene and method for...

B - Operations, Transporting

29

C

18/1165

B29C 71/02 (2006.01) B29C 67/24 (2006.01) C08F 110/06 (2006.01)

Patent

CA 2030245

ABSTRACT OF THE DISCLOSURE A molded article of a syndiotactic polypropylene having excellent transparency in which a melting point attributed to the polypropylene having the syndiotactic structure measured at a heating rate of 10°C/minute by differential scanning thermal analysis is represented by a substantially single peak, the aforesaid molded article being prepared by heating, melting and then hot-molding a homopolymer of propylene or a copolymer of propylene and a small amount of another olefin, which have a substan- tially syndiotactic structure, or a mixture of the homopolymer or the copolymer and a small amount of a polypropylene having a substantially isotactic structure, followed by quenching, or, after these steps, addition- ally subjecting the above molded article to a heat treatment at a temperature of less than its melting point. A method for preparing the above molded article is also disclosed here.

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