Method for coating a polymeric article with a thermochromic pain

Details Method for coating a polymeric article with a thermochromic pain Method for coating a polymeric article with a thermochromic pain

1978-09-14

1980-10-21

Gron, Teddy S.

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Indicators

Methods

73150R, 73150A, 73356, 73 17R, 106308B, 116207, 116216, 206459, 206484, 252408, 428349, 428411, 428539, C09K 300, C09D 526, G01K 1114

Patent

active

042287618

ABSTRACT:
An improved method for indicating the temperature to which a heat-deformable polymeric material coated with a thermochromic paint has been heated is disclosed. The improvement comprises the addition to the thermochromic paint of a non-thermochromic compound selected from the group consisting of the sulfates, hydrated sulfates and nitrides of boron, aluminum, tin, lead, arsenic, antimony, bismuth, zinc and phosphorus; the sulfides and hydrated sulfides of boron, aluminum, bismuth and phosphorus; the oxides and hydrated oxides of boron, arsenic, antimony and phosphorus and the salts, organic derivatives and free acids of the oxyanions of boron, arsenic, antimony and phosphorus.

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