Water-based reversible thermochromic ink and preparation method thereof

Abstract

The invention discloses a water-based reversible thermochromic ink, which is composed of the following components in percentage by mass: 14-25% of thermochromic powder; 9%-11% of polyvinyl alcohol; 65.5% to 74.4% of purified water; and 0.5%-0.6% of a base material wetting agent, wherein the sum of the mass percentages of the components mentioned above is 100%, the thermochromic powder comprises crystal violet lactone, bisphenol A and tetradecyl alcohol; and the mass ratio of crystal violet lactone to bisphenol A to tetradecyl alcohol is 1: (3-4): (10-20). The invention also discloses a preparation method of the water-based reversible thermochromic ink.

Description

technical field [0001] The invention belongs to the technical field of printing ink preparation, specifically relates to a water-based reversible thermochromic ink, and also relates to a preparation method of the water-based reversible thermochromic ink. Background technique [0002] With the continuous deepening of research on thermochromic inks, the application of thermochromic inks in various fields is also expanding. At present, it is mainly used on the surface of objects that need to display temperature, such as motors, etc. On the product packaging for anti-counterfeiting treatment, after changing the temperature, observe whether the color of the printed text or pattern has changed to identify whether the product is true or not, as well as for personalized printing, etc. [0003] At present, there are more or less the following four problems in temperature-changing inks: ①The discoloration temperature is too high, which is inconvenient for direct inspection. ②The disc...