US 12,306,154 B2
Meltable color changeable indicators with organic polymer cores and methods of making such meltable indicators and composites thereof
Gregory L. Heacock, Maple Valley, WA (US); and Andrew Mills, Holywood (GB)
Assigned to THERMOGRAPHIC MEASUREMENTS LIMITED, (GB)
Filed by Thermographic Measurements Limited, Connah's Quay (GB)
Filed on Dec. 5, 2017, as Appl. No. 15/832,379.
Prior Publication US 2019/0170714 A1, Jun. 6, 2019
Int. Cl. G01N 31/22 (2006.01); B29C 48/04 (2019.01); B32B 27/00 (2006.01); C08J 3/02 (2006.01); C08J 3/12 (2006.01); C08J 3/22 (2006.01); C08K 5/17 (2006.01); C08K 9/10 (2006.01); C08L 23/04 (2006.01); C08L 23/06 (2006.01); C08L 23/12 (2006.01); C08L 25/06 (2006.01); C08L 33/12 (2006.01); C08K 5/00 (2006.01); C08K 5/42 (2006.01); C08K 5/46 (2006.01)
CPC G01N 31/223 (2013.01) [B29C 48/04 (2019.02); B32B 27/00 (2013.01); C08J 3/02 (2013.01); C08J 3/126 (2013.01); C08J 3/226 (2013.01); C08K 5/17 (2013.01); C08K 9/10 (2013.01); C08L 23/04 (2013.01); C08L 23/06 (2013.01); C08L 23/12 (2013.01); C08L 25/06 (2013.01); C08L 33/12 (2013.01); C08K 5/0041 (2013.01); C08K 5/42 (2013.01); C08K 5/46 (2013.01); C08L 2666/70 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A color changeable organic polymeric composite comprising:
bulk organic polymer;
organic polymer core particles; and
organic color changeable indicator dye that detects the presence of a chemical substance, wherein the organic color changeable indicator dye is coated on the organic polymer core particles to form organic indicator particles, wherein the organic indicator particles have an average particle size between 10 and 1000 microns, wherein the bulk organic polymer is extruded or melted with the organic indicator particles to produce the color changeable organic polymer composite, wherein the organic color changeable indicator dye is substantially homogeneously dispersed within and throughout the color changeable organic polymer composite, and wherein the color changeable organic polymer composite substantially lacks inorganic particulates, and wherein the color changeable organic polymeric composite is in the form of a film having a thickness of approximately 10 microns to approximately 250 microns.