Temperature indicating paint

Details Temperature indicating paint Temperature indicating paint

2005-03-08

2005-03-08

Warden, Jill (Department: 1743)

Chemistry: analytical and immunological testing

Metal or metal containing

Mn, te, re, fe, ru, os, co, rh, ir, ni, pd, pt

C436S073000, C436S164000, C422S082120, C106S400000, C106S403000, C106S404000, C106S480000

Reexamination Certificate

active

06864096

ABSTRACT:
An irreversible temperature indicating paint comprises 29 wt % to 37 wt % cobalt chromite spinel, alumina, gold purple and frit, 35 wt % to 45 wt % acrylic resin and 20 wt % to 30 wt % silicone resin excluding solvent. The solvent comprises a mixture of 80% 1-methoxy-2-propanol and 20% dipropylene glycol monomethyl ether. A particular irreversible temperature indicating paint comprises 34.9 wt % cobalt chromite spinel, alumina, gold purple and frit, 42.5 wt % acrylic resin and 22.6 wt % silicone resin excluding solvent. The irreversible temperature indicating paint has four or more colour changes in the temperature range 500° C. to 900° C. The irreversible temperature indicating paint is used to determine the temperatures to which various parts of turbine blades, turbine vanes or other component are subjected in operation of a gas turbine engine.

REFERENCES:
patent: 1103059 (1968-02-01), None
patent: 2204874 (1998-11-01), None
Lambourne et al, Paint and Surface Coatings, 1999, William Andrew Publishing, 2nd Edition, pp. 5-6.

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