申请人:3M INNOVATIVE PROPERTIES COMPANY
公开号:US20210024793A1
公开(公告)日:2021-01-28
A two-part curable composition comprises a Part A and a Part B. The Part A composition includes polyuretdione having an average uretdione ring functionality of at least 1.2. Part B composition includes polythiol having an average sulfhydryl group functionality of at least 1.2. At least one of the Part A composition and the Part B composition may further comprise accelerator for addition of the polythiol to the polyuretdione. The accelerator comprises a basic salt having the formula M+Zb−x y wherein M+ is a cation having a single positive charge a, wherein a is 1, 2, or 3; Zb− is an oxide anion having a negative charge b−, wherein b is 1 or 2; and x and y are positive integers, wherein x equals y times b. Cured compositions, methods of making them and articles including them are also disclosed.