The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 24, 1992
Filed:
Sep. 11, 1990
George Kletecka, Fairview Park, OH (US);
John T Lai, Broadview Heights, OH (US);
Pyong N Son, Akron, OH (US);
The B. F. Goodrich Company, Akron, OH (US);
Abstract
An oxo-piperazinyl triazine with three piperazinone substituents, each of which has an alkylated N.sup.4 atom ('MPIP-T'), used in an amount no more than 0.2 phr, and without any secondary stabilizer (hence referred to as a 'virgin MPIP-T'), and in particular, without any hindered phenol antioxidant, or phosphorous acid ester, simultaneously provides thermooxidative stability and stability against degradation by UV light along with acceptable melt processability. Further, the virgin MPIP-T allows (i) uninterrupted operation of a die or mold while maintaining the surfaces of the cavities essentially contaminant-free; and, (ii) excellent AO stabilization which is equivalent to that obtained with a premier hindered phenol AO, and superior to that obtained with the premier oligomeric piperidinyl-triazine compound, when each stabilizer is used in the same amounts by weight in a thermoplastic synthetic resinous substrate.