Pipe joints or couplings – Temperature responsive joint element; e.g. – shrunk fit – Memory plastic element
Patent
1981-11-25
1984-01-10
Gron, Teddy S.
Pipe joints or couplings
Temperature responsive joint element; e.g., shrunk fit
Memory plastic element
29447, 29450, 29516, 29526R, 116206, 116207, 116216, 138 99, 285256, 285417, 285422, 374141, 374161, 374162, 403273, 403278, 436 2, 436147, C09D 526, G01K 1114, G01K 1116, F16L 4700, F16L 914, F16L 2100, F16L 5500
Patent
active
044249900
ABSTRACT:
This invention provides novel thermochromic compositions which exhibit distinct color changes at temperatures in the range of about 165.degree. C. to about 240.degree. C. The compositions comprise basic copper carbonate and a sulfur compound. Paint formulations containing these novel thermochromic compositions or complexes of copper and sulfur-containing organic acids are also provided. The compositions are useful with heat-recoverable memory metal couplings to prevent overheating of the couplings during installation.
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Gen Tamar G.
White Lawrence J.
Burkard Herbert G.
Gron Teddy S.
Raychem Corporation
Rice Edith A.
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