COMPOSITIONS, METHOD OF BONDING, AND ASSEMBLY

    公开(公告)号:US20210024793A1

    公开(公告)日:2021-01-28

    申请号:US16980130

    申请日:2019-03-06

    Abstract: 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.

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