Abstract: A polymer hydrogel with a slow-release function, and a preparation method and use thereof are provided. The polymer hydrogel includes the following components in mass percentage contents: 0.01% to 15% of an active ingredient, 0.01% to 15% of an ion inhibitor, 0.01% to 1% of a crosslinking agent, 0.1% to 10% of a polymer resin, 10% to 35% of a solvent, 0.1% to 15% of a skin-touch regulator, 10% to 55% of deionized water, 0.1% to 3% of an appearance modifier, 0.01% to 1% of a crosslinking regulator, 0.01% to 1% of a preservative, and 0.01% to 5% of a transdermal absorption enhancer. The polymer hydrogel prepared by the present disclosure has excellent skin adaptability and skin permeability, long drug slow-release time, and excellent bioadhesion to the skin, and can be repeatedly peeled off without residue.

Abstract: Polymers, hydrogels, and thermochromic agents, including products embodying them, methods of using them, and processes for making them. In certain embodiments, temperature therapy packs which utilize thermochromic agents integrated into solid, semi-solid, or liquid hydrogels. In preferred (but optional) embodiments, the thermochromic agents are integrated into the composition used as the temperature exchange material of the therapy pack. In certain other embodiments, methods of using the thermochromic integrated temperature exchange materials, or processes for manufacturing such thermochromic integrated temperature exchange materials and/or methods or processes for manufacturing or using thermal packs embodying such materials. In certain particularly preferred embodiments, novel polymer compositions and/or processes for making polymers, which improve product durability or longevity and/or which improve use cycles or usage times.