C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
400/9026
C08L 47/00 (2006.01) C08K 5/34 (2006.01) C08L 23/00 (2006.01)
Patent
CA 2019285
1890055 THERMOOXIDATIVE STABILIZATION OF POLYOLEFINS WITH A TRI-SUBSTITUTED-TRIAZINE UV LIGHT STABILIZER AND A PHOSPHOROUS ACID ESTER ABSTRACT OF THE DISCLOSURE Only two symmetrical stabilizers in a polyolefin or copolymer thereof provide thermooxidative or antioxidative stability. One is a phosphite, namely a triaryl phosphite or a pentaerythritol phosphite, symmetrical about the P and C atoms respectively, present in a trace amount, less than 0.1 phr; the other is a tri-substituted triazine derivative ("PIP-T") in which the 2-, 4- and 6-positions of the triazine ring are substituted with a polysubstitut- ed piperazin2-one, piperazine, or piperidine. No other stabilizer such as a hindered phenol antioxidant, is re- quired. Articles thermoformed from the stabilized poly- (alpha-olefin) or copolymer thereof may be used under the hood or the dash of a vehicle, and, in containers for packaging goods, all of which articles are subject to thermooxidative degradation even if they are not subject to ultraviolet light degradation.
Goodrich (b.,f.) Company (the)
Jennings Eileen
Swabey Ogilvy Renault
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