Two-part compositions including a uretdione-containing material and inorganic filler, products, and methods

A method of adhering two substrates together comprising:

• A) obtaining a two-part composition, the two-part composition comprising:
• 1) a first part comprising a polymeric material comprising:
• a) a polymerized reaction product of a polymerizable composition comprising components, the components comprising:
• i) a uretdione-containing material comprising a reaction product of a diisocyanate reacted with itself;
• ii) a first hydroxyl-containing compound having more than one OH group;
• and
• iii) an optional second hydroxyl-containing compound having a single OH group, wherein the second hydroxyl-containing compound is a primary alcohol or a secondary alcohol;
• and
• b) 40% by weight or greater of an inorganic filler, based on the total weight of the polymeric material;
• wherein the polymerized reaction product comprises a uretdione functionality of 1.3 to 2.5 and wherein the polymerized reaction product has a number average molecular weight (Mn) of 1100 grams per mole (g/mol) or greater;
• and
• 2) a second part comprising:
• a) a polythiol having an average sulfhydryl group functionality of 2 or greater;
• and
• b) 40% by weight or greater of an inorganic filler, based on the total weight of the second part;
• B) combining at least a portion of the first part with at least a portion of the second part to form a mixture;
• C) disposing at least a portion of the mixture on a first major surface of a first substrate;
• and
• D) contacting a first major surface of a second substrate with the mixture disposed on the first substrate.