Stable alkenyl succinic anhydride sizing emulsion for papermaking and preparation method thereof

Abstract

The invention relates to a sizing agent in the technical field of papermaking, in particular to stable alkenyl succinic anhydride sizing emulsion for papermaking. The stable alkenyl succinic anhydride sizing emulsion for papermaking comprises deionized water, alkenyl succinic anhydride, hectorite and alanine, wherein a mass ratio of the alkenyl succinic anhydride to the water is 1:(1-5); a mass ratio of the hectorite to the alkenyl succinic anhydride is 1:(20-200); and a mass ratio of the alanine to the hectorite is 1:(20-200). A preparation method is characterized by comprising the following steps of: dispersing the hectorite in the deionized water to obtain a hectorite colloid; adding an aqueous solution of alanine into the hectorite colloid; regulating pH, and uniformly mixing with the alkenyl succinic anhydride (ASA) to obtain the stable alkenyl succinic anhydride sizing emulsion for papermaking. The using amount of an emulsifier is small, and the emulsification cost is low; and the prepared emulsion has high concentration, stability and sizing efficiency. An emulsification process is simple, and the sizing efficiency of the obtained emulsion can be greatly improved.

Description

technical field

[0001] The invention relates to a sizing agent in the technical field of papermaking, in particular to a stable alkenyl succinic anhydride papermaking sizing emulsion and a preparation method for the stable alkenyl succinic anhydride papermaking sizing emulsion. Background technique

[0002] Alkenyl succinic anhydride, referred to as ASA, is the product of the addition reaction of olefins and maleic anhydride. It is a highly efficient reactive paper-making sizing agent. It has the advantages of fast reaction rate and high sizing efficiency. It is widely used in various paper and cardboard of sizing agent. In the sizing reaction, the acid anhydride groups combine with the hydroxyl groups of the cellulose to fix the ASA molecules on the cellulose, and at the same time make the hydrophobic groups align on the surface of the fibers, thus endowing the fibers with certain water resistance. The particle size of ASA emulsion droplets should be small, and should have...