| abstract |
The present disclosure provides a polymeric material including a reaction product of a polymerizable composition and having a solid content of 90% or more. The polymerizable composition includes: a uretdione-containing material including a reaction product of a diisocyanate that reacts with itself; a first hydroxyl-containing compound having a single OH group; and a second hydroxyl-containing compound having more than one OH group Compound. The first hydroxy-containing compound is a primary alcohol or a secondary alcohol, and the second hydroxy-containing compound is a diol, and the reaction product contains a diol equivalent of 0.2 to 0.5 (inclusive) relative to the isocyanate equivalent. The disclosure also provides a two-part composition, wherein the polymeric material is included in the first part, and the second part includes at least one amine. In addition, a method for adhering two substrates is provided, which includes obtaining a two-part composition; combining at least a part of the first part with at least a part of the second part to form a mixture; and disposing at least a part of the mixture at the first On the substrate; and contacting the second substrate with the mixture disposed on the first substrate. The disclosure also provides a polymeric material and a method of making a two-part composition. Advantageously, the two-part composition according to the present disclosure can be used as a coating and adhesive system, and its treatment and performance are similar to existing two-part urethane systems, but with lower sensitivity to water. |