Pressure sensitive adhesive containing a nucleating agent for use in a disposable thermometer

A temperature-indicating device, comprising:

• (a) heat-conducting carrier means having at least one spaced region defined therein to determine a like number of predetermined temperatures in a predetermined temperature range, said at least one spaced region containing a like number of different temperature-indicating mixtures therein, each mixture being a solid solution having a given nucleation efficiency and melting at or about one of said predetermined temperatures,
• (b) a transparent cover layer means sealing said heat-conducting carrier means, said spaced regions, and said temperature-indicating mixtures, said transparent cover layer means and said heat-conducting carrier means capable of bonding to each other by adhesive means;
• and
• (c) adhesive means (i) covering said heat-conducting carrier means, said spaced regions, and said temperature-indicating mixtures and (ii) bonding said heat-conducting carrier means to said transparent cover layer means, said adhesive means comprising:
• (1) from about 0.5 to about 5.0 phr. of a nucleating agent selected from the group consisting of talc, howlite, titanite, Guyana bauxite, Arkansas bauxite, Spanish sepiolite, lepidolite, stilbite, petalite, calcium aluminate, and azurite substantially uniformly dispersed in
• (2) a pressure-sensitive adhesive, said nucleating agent being (A) inert to both said pressure-sensitive adhesive and said temperature-indicating mixtures and (B) capable of raising the nucleation efficiency of said temperature-indicating mixtures.