METHOD OF MAKING GLUING GASKET Russian patent published in 2019 - IPC C08J5/24 C08L63/00 C08L9/00 C08K5/54 

FIELD: manufacturing technology.

SUBSTANCE: invention relates to a method of producing gaskets, gluing based on epoxy resins and glass fabrics, used for making multilayer printed-circuit boards, including flexible-rigid. To produce gluing gasket solvents – mix of toluene and acetone in ratio 1:1, tetramethylsilane are mixed in mixer. Epoxy resin is added to mixture of solvents after their mixing with mixer. Then spherical particles of butadiene-nitrile-styrene-carboxylate polymer, silicone substance, 4,4'-diaminodiphenylsulphone and acetylacetonate are added. Components are further stirred at temperature of 20–30 °C until complete dissolution of epoxy resin. Obtained solution impregnates glass fabric, followed by drying at temperature 240–243 °C for 4–4.5 minutes.

EFFECT: improved properties of the manufactured gluing insert, expressed in reduction of warping of the multilayer printed-circuit board made by pressing the gluing spacer between the layers of the board at temperature (185±1) °C for 2 hours and pressure of 12 MPa occurring after exposure to temperature (204±1) °C for 600±6 s, buckling does not exceed 0,1 mm.

1 cl, 2 tbl