Resin-molded product and yellowing inhibitor

Details Resin-molded product and yellowing inhibitor Resin-molded product and yellowing inhibitor

1996-06-27

1999-08-24

Gulakowski, Randy

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...

524418, 524419, 524421, C08K 513

Patent

active

059425679

ABSTRACT:
A resin-molded product includes a phenol-based oxidation inhibitor, and a thiol-based compound. The thiol-based compound reacts chemically with a coloring substance (or a compound having a quinone-type structure) resulting from the phenol-based oxidation inhibitor to interrupt a long conjugated system arising in the coloring substance. As a result, the absorption due to the coloring substance is canceled in the visible light region. Thus, the resin-molded product is inhibited from yellowing.

REFERENCES:
patent: 4446264 (1984-05-01), Cottman
patent: 4735980 (1988-04-01), Sturm et al.
patent: 4824883 (1989-04-01), Walters et al.
patent: 5032634 (1991-07-01), Walter
Database WPI, Derwent Publications Ltd. re JP-A58132035, Aug. 1983.
Chem., Abstract AN105:79850, Iida et al., Japanese Journal, 1986.
Hawley's Chem. Dictionary, p. 601, 1993.

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