Thermodegradable compositions based on crystalline homo-or...

Details Thermodegradable compositions based on crystalline homo-or... Thermodegradable compositions based on crystalline homo-or...

C - Chemistry, Metallurgy

08

F

400/5358, 400/94

C08F 8/50 (2006.01) C08K 5/54 (2006.01) C08L 23/10 (2006.01)

Patent

CA 1336217

The selective thermodegradation of homo- and copolymers of propylene is carried out, without meeting with thermooxidation phenomena, by treating the polymer at 250- 350°C in the presence of a derivative of benzopinacol, having general formula (I) and of primary and/or secondary antioxidants. Image (I) wherein n = 1, or = 0, for n = 1 and X = 1, Z1 and Z2 form together with each other Image groups A and B = Image groups wherein R1, R2, R3, which may be the same or different, are alkyl or aryl radicals; or X ranges from 3 to 20 and in this case Z1 and Z2 are aryl radicals, A and B are R1-Si-R2 groups being part of an oligomer having formula Image ; when n = 0, X is = 1, Z1 and Z2 are aryl radicals, whereas A is a Image group or a Image group * * * * * *

589381

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