Stabilizer mixtures

Details Stabilizer mixtures Stabilizer mixtures

2006-04-11

2006-04-11

Yoon, Tae H. (Department: 1714)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

C524S091000, C524S099000, C524S100000, C524S102000, C524S103000, C524S291000, C524S359000, C524S398000, C524S400000, C524S432000, C524S433000, C524S434000, C524S438000, C252S400100, C252S401000, C252S403000

Reexamination Certificate

active

07026380

ABSTRACT:
A stabilizer mixture containing A) either (A1) at least one compound of the formulain which R1is for example hydrogen or C1–C8alkyl; R2, R3, R5and R6are for example hydrogen, C1–C30alkyl or phenyl; R4is for example C1–C30alkyl or 2,2,6,6-tetramethyl-4-piperidyl; and n1is a number from 1 to 50; or (A2) at least one compound of the formulaewherein n2and n2* are a number from 2 to 50;B) magnesium oxide, magnesium hydroxide, zinc oxide, zinc hydroxide or an organic salt of zinc or magnesium; andC) either(C1) an UV absorber or(C2) a pigment or(C3) an UV absorber and a pigment;with the proviso that, when component A) is at least one compound of the formulae (IIIa) and (IIIb), component B) is magnesium oxide, magnesium hydroxide or an organic salt of zinc or magnesium.Such a stabilizer mixture is particularly useful for stabilizing a polyolefin against light-induced degradation.

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