B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
18/1181, 400/491
B29C 35/00 (2006.01) B29C 67/24 (2006.01) C08J 5/00 (2006.01) C08K 3/00 (2006.01) C08K 5/00 (2006.01) C08L 23/10 (2006.01) B29C 71/02 (2006.01)
Patent
CA 2030807
According to the present invention, molded articles can be provided in which a melting point attributed to a syndiotactic polypropylene and measured at a temperature rise rate of 10°C/minute by differential scanning thermal analysis is indicated by a substantially single peak, the aforesaid molded articles being obtained by heating, melting and molding a substantially syndiotactic homopolymer of propylene, a substantially syndiotactic copolymer of propylene and a small amount of another olefin, or a mixture of these polymers and a small amount of a substantially isotactic polypropylene, and then subjecting the molded products to a heat treatment. Furthermore, a method for preparing the above-mentioned molded articles is also provided. The molded articles have high stiffness and impact resistance.
Asanuma Tadashi
Inoue Takeo
Sasaki Tateyo
Shiomura Tetsunosuke
Uchikawa Nobutaka
Fetherstonhaugh & Co.
Mitsui Chemicals Incorporated
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