C - Chemistry – Metallurgy – 09 – K
Patent
C - Chemistry, Metallurgy
09
K
150/1, 73/123
C09K 3/00 (2006.01) C10M 133/58 (2006.01) G01K 11/06 (2006.01)
Patent
CA 1186199
ABSTRACT OF THE DISCLOSURE A new and useful composition of matter, solid at room temperature, is disclosed, comprising:(1) an effective amount of a suitable nucleating agent substantially uniformly dispersed in (2) a suitable pressure-sensitive adhesive for encapsulating a temperature-sensitive solid mixture having a given nucleation efficiency and which melts at a predetermined temperature, whereby the suitable nucleating agent is (a) inert to both the pressure-sensitive adhesive and the temperature- sensitive solid mixture, and (b) capable of raising the nuclea- tion efficiency of said solid mixture. The novel composition of matter overcomes the extreme super-cooling achieved by temperature indicating compositions of matter in U.S. Patant 4,232,552 (which change color with a change in phase) without the use of classical nucleating agents being employed in such temperature-indicating compositions of matter. The novel adhesive composition of matter has been found to be especially suitable in conjunction with a preferred 552 temperature-in- dicating composition of matter comprising pinacyanol iodide dissolved in a solvent comprising ortho-chloronitrobenzene and ortho-bromonitrobenzene. An especially suitable novel adhesive of the instant invention comprises 0.5 to about 5.0 phr talc in polyisobutylene.
400088
Hof Craig R.
Nickoloff Dennis
Ulin Roy A.
Py Mah Corporation
Swabey Ogilvy Renault
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