Preparation method of modified AKD (Alkyl Ketene Dimer) neutral sizing agent

Abstract

The invention relates to a modified AKD (Alkyl Ketene Dimer) neutral sizing agent which is a milk white liquid in appearance. The modified AKD neutral sizing agent comprises the following main materials: AKD, starch, paraffin, high molecular dispersant and other assistant materials. The modified AKD neutral sizing agent is mainly used for sizing paper pulp and improving the water resistance and impermeability of paper in the paper-making production process, and the consumption for every ton of paper is 10-20kg. Compared with like products, the quickly-cured modified AKD neutral sizing agent has the following advantages: (1) effective ingredient particles of the product are finer and more uniform and can be cured more tightly, the product has a longer quality guarantee period, and convenience is provided for transportation and storage; (2) the product is applicable to neutral paper pulp and can no longer result in the production of acidic paper-making sewage, thereby being beneficial to environmental protection; (3) the use effect of the product can act quickly, and the curing time is extremely short, thereby facilitating the effect monitoring and quality control in use, improving the production efficiency and enhancing the yield of paper; and (4) the consumption of the product is lower than that of other like products, thereby reducing the cost of production materials and improving the economic benefits of customers.

Description

[0001] technical field [0002] The invention belongs to a preparation process of fine chemical raw materials, and more specifically relates to a preparation method of a modified AKD neutral sizing agent for papermaking. Background technique [0003] The existing similar products on the market mainly include ordinary AKD emulsion, dispersed rosin gum, ASA emulsion and other products. These products have shortcomings: [0004] Example 1: Ordinary AKD emulsion: (1) The aging period is long, and the effect appears slowly; (2) The particles in the product are easy to aggregate into large particles; (3) The paper surface is easy to slip during use. [0005] Example 2: Dispersed rosin gum: (1) Not suitable for use in neutral pulp; (2) Easy to delaminate, short shelf life; (3) It needs to be used with other aluminum salt raw materials to be effective, and the customer's production cost is high. [0006] Example 3: ASA emulsion: (1) short shelf life and inconvenient storage; (2) on...

AI Technical Summary

Problems solved by technology

[0004] Example 1: Ordinary AKD emulsion: (1) The aging period is long, and the effect appears slowly; (2) The particles in the product are easy to aggregate into large particles; (3) The paper surface is easy to slip during use

[0005] Example 2: Dispersed rosin gum: (1) Not suitable for neutral pulp; (2) Easy to delaminate, short shelf life; (3) It needs to be used with other aluminum salt raw materials to be effective, and the production cost of customers is high

[0006] Example 3: ASA emulsion: (1) short shelf life and inconvenient storage; (2) on-site emulsification is required before use, which is troublesome to operate; (3) difficult to control during application, and the effect is unstable