CURABLE COMPOSITIONS THAT CONTAIN HYDRAZIDE FUNCTIONAL MATERIALS Russian patent published in 2018 - IPC C08G59/40 C09D163/00 C09J163/00 

FIELD: chemistry.

SUBSTANCE: curable composition contains the following components: (a) a hydrazide functional material having a formula of in which n is 2, x is 0 and y is 1 to n of the first link; and x is 0 or 1 and y is 0 or 1 n for the second link. The condition that the sum of x and y is 1, L₁ independently for each n is selected from a divalent hydrocarbyl group optionally interrupted by at least one member selected from -O- and -S-, L₂ independently for each n is selected from a divalent hydrocarbyl group, and R¹ independently for each n, is selected from a hydrogen atom and hydrocarbyl; and (b) a reagent comprising at least two reactive groups that are reactive with the hydrazide groups of the hydrazide functional material and form covalent bonds therewith. The hydrazide functional material is a trihydrazide or tetrahydrazide-functional material.

EFFECT: invention allows to obtain compositions able to be cured at lower temperatures or reduced curing times in comparison with the existing curable compositions without deterioration of desired physical properties.

22 cl, 2 tbl, 3 ex