C - Chemistry – Metallurgy – 08 – J
Patent
C - Chemistry, Metallurgy
08
J
403/78, 403/80
C08J 9/22 (2006.01) C08J 9/18 (2006.01) C08J 9/228 (2006.01) C08L 23/10 (2006.01) C08L 23/14 (2006.01)
Patent
CA 1220000
Abstract of the Disclosure Preliminarily foamed particles of a non-cross- linked polypropylene-type resin based on a mixture of 10 to 95 % by weight of an alpha-olefin/propylene random copolymer having an amount of the heat of crystalliza- tion of not more than 10 cal/g in differential scanning calorimetry and 90 to 5 % by weight of an ethylene/pro- pylene random copolymer as a base resin, said prelimina- rily foamed particles having such a crystal structure that when a DSC curve is drawn by heating 1 to 3 mg of the preliminarily foamed particles to 220 °C at a rate of 10 °C/min. by means of a differential scanning calorimeter, a high temperature peak is observed at a higher temperature than the temperature of the peak inherent to the base resin. These preliminarily foamed articles can be moled under lower vapor pressures than in the prior art.
469152
Kuwabara Hideki
Sudo Yoshimi
Japan Styrene Paper Corporation
Smart & Biggar
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