METHOD OF USING ALDEHYDE-FUNCTIONALISED POLYMERS TO INCREASE EFFICIENCY OF PAPER-MAKING MACHINE AND IMPROVEMENT OF SIZING Russian patent published in 2016 - IPC D21H21/16 C09J161/00 C08L61/00 C09J5/00 D21F11/00 C08L1/02 C08G2/00 

FIELD: textile and paper.

SUBSTANCE: invention is a composition for improvement of sizing of paper and cardboard during production, containing adhesive emulsion with an adhesive additive containing one or more aldehyde-functionalised polymers in stabilising amount, having at least one type of aldehyde-reactive monomer in said polymer. Said type of monomer is selected from non-ionic monomers, cationic monomers, anionic monomers, zwitterion monomers, as well as any combination of said substances, and one or more aldehyde-functionalised polymers having average molecular weight of at least 50,000 g/mol. Invention also relates to a method for improvement of production of paper and cardboard and improvement of sizing by adding described adhesive mixture in an effective amount in a paper detail machine and method of producing medium with cellulose fibres, which involves addition of said adhesive mixture to medium at any moment of paper production process.

EFFECT: also described and claimed are novel adhesive mixtures in order to achieve improved sizing along with other advantages.

15 cl, 3 dwg, 1 tbl, 5 ex