Aqueous dispersions for antioxidants

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...

Reexamination Certificate

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C524S503000

Reexamination Certificate

active

11387358

ABSTRACT:
The present invention relates to aqueous dispersions for solid phenolic antioxidants, wherein the antioxidants are dispersed in the aqueous phase with polyvinyl alcohol as dispersing agent. The invention also relates to a process, which comprises stabilising a polymer material against oxidative, thermal or light-induced degradation by adding to the polymer the aqueous dispersion.

REFERENCES:
patent: 6277910 (2001-08-01), Rassing et al.
patent: 6677409 (2004-01-01), Saito et al.
patent: 2001/0022965 (2001-09-01), Heger et al.
patent: 2003/0073768 (2003-04-01), Koch et al.
patent: 0281210 (1988-09-01), None
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patent: 0884352 (1998-12-01), None
patent: 1043340 (2000-10-01), None
patent: 1085069 (2001-03-01), None
patent: 1366702 (1974-09-01), None
patent: 11-349940 (1999-12-01), None
Chem. Abstract 132:50692 for JP 11349940, Dec. 21, 1999.
Gohsenol: Customer information by Nippon Gosei, published Oct. 2000, pp. 1-31.

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