Polymeric material including a uretdione-containing material and an epoxy component, two-part compositions, and methods

A two-part composition comprising:

• (a) a first part comprising a polymeric material comprising:
• 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;
• (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
• (iv) (iv) an epoxy component;
• wherein the polymeric material comprises an average of 1.3 or greater of a uretdione functional group in a backbone of the polymeric material and wherein the polymeric material comprises a solids content of 90% or greater and exhibits a dynamic viscosity of 10 Poise (P) to 10,000 P, inclusive, as determined using a Brookfield viscometer;
• and
• (b) a second part comprising at least one amine, at least one molecule of the at least one amine having an average amine functionality of 2.0 or greater, wherein each amine is a primary amine or a secondary amine.

A method of adhering two substrates together, the method comprising:

• (a) obtaining a two-part composition, the two-part composition comprising:
• (i) a first part comprising:
• a polymeric material comprising a reaction product of a polymerizable composition comprising components, the components comprising:
• (1) a uretdione-containing material comprising a reaction product of a diisocyanate reacted with itself;
• (2) a first hydroxyl-containing compound having more than one OH group;
• (3) 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
• (4) an epoxy component;
• wherein the polymeric material comprises an average of 1.3 or greater of a uretdione functional group in a backbone of the polymeric material and wherein the polymeric material comprises a solids content of 90% or greater and exhibits a dynamic viscosity of 10 Poise (P) to 10,000 P, inclusive, as determined using a Brookfield viscometer;
• and
• (ii) a second part comprising at least one amine, at least one molecule of the at least one amine having an average amine functionality of 2.0 or greater wherein each amine is a primary amine or a secondary amine;
• (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.