Inhibiting polymer oxidation using non-phenolic antioxidants

Details Inhibiting polymer oxidation using non-phenolic antioxidants Inhibiting polymer oxidation using non-phenolic antioxidants

2006-05-30

2006-05-30

Egwim, Kelechi C. (Department: 1713)

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

Synthetic resins

Processes of preparing a desired or intentional composition...

Reexamination Certificate

active

07053139

ABSTRACT:
The oxidation of a polymer is inhibited by adding to the polymer about 0.005 to about 10 phr of an antioxidant having (in non-polymeric form) the general formulaThe polymer can be poly(vinylchloride), a polycarbonate, a polyether, polyethylene, polypropylene, or a mixture thereof when the antioxidant is not phthalide and can be poly (vinylchloride), a polycarbonate, a polyether, or a mixture thereof when the antioxidant is phthalide. In the formula, E is O, S, or N, R1is H, R′, OR′, SR′, OP(R′)2, COR′, each R is independently selected from R1, alkylenyl from C1to C12, aminoalkyl from C1to C12, and hydroxyalkyl from C1to C12, R′ is alkyl from C1to C12or aryl, alkylaryl, or aralkyl from C6to C12, R″ is G, GO, GS, GNH, NHG, NHGO, NHGNH, NHGS, OG, OGO, OGNH, OGS, SGO, SGNH, or SGS, G is aklkylenyl from C1to C12, arylenyl from C6to C12, alkylarylenyl from C7to C12, or arylalkylenyl from C7to C12, m is 0 if E is O or S and is 1 if E is N, and two R groups can join from an alicyclic ring or an aromatic ring or an R group and an R1group can join to form an alicyclic ring.

REFERENCES:
patent: 1941474 (1934-01-01), Jaeger
patent: 4082716 (1978-04-01), Fielding et al.
Peter Sorera, New trends in Polymer Stabilization, Journal of Vinyl & Additive Technology, Sep. 1998, vol. 4, No. 3.

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