BINDER BASED ON PHENOLIC RESIN WITH REDUCED FORMALDEHYDE CONTENT Russian patent published in 2022 - IPC C08G18/18 C08G18/54 C08G18/76 C08G8/10 

FIELD: casting.

SUBSTANCE: invention relates to compositions of phenolic resins of a benzyl-ester type. A composition is proposed for the use in a method for the manufacture of rods in cool boxes, using phenolic resin/polyurethane (PUCB-method) and/or in a method, using cold curing, using phenolic resin/polyurethane (PUNB-method) based on phenolic resin of a benzyl-ester type. In this case, the composition contains at least one formaldehyde absorber in the form of a beta-dicarbonyl compound, as well as an alpha-carbonyl-carboxylic compound. A binder based on the specified composition, a mixture based on molding material and the specified binder, a method for the production of rods, forms, or molds from the specified mixture, a corresponding cast form, a rod, or a mold, and their use for metal casting are also proposed.

EFFECT: proposed composition has a reduced formaldehyde content, while providing high strength characteristics of the resulting products.

22 cl, 3 tbl