COMPOSITE PRODUCTS Russian patent published in 2022 - IPC B27N3/00 

FIELD: composite products.

SUBSTANCE: binding composition is obtained by combination of reagents containing at least 50 wt.% by dry weight of a reducing sugar reagent and at least 5 wt.% by dry weight of a nitrogen-containing reagent. The nitrogen-containing reagent contains tri-primary triamine, in particular at least 5 wt.% by dry weight of tri-primary triamine. Tri-primary triamine is an organic compound with three and only three amines, wherein each of amines is primary amine or its salt, selected from tri-primary triamine with spacer groups between each of three primary amines, which consist of carbon chains, tri-primary triamine with spacer groups between each of three primary amines, where each spacer group has a spacer length, which is less than or equal to 12 polyvalent atoms, and tri-primary triamine with the total number of polyvalent atoms, which is less than or equal to 23.

EFFECT: curing speed, bond strength, separation strength, and tensile strength are improved, swelling is reduced, ease of handling and good stability in storage of a composite product are provided.

15 cl, 3 tbl, 3 dwg