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Novel cationic rosin sizing agent and application thereof

A cationic rosin and sizing agent technology, which is applied in the field of papermaking, can solve the problems of poor mechanical stability of rosin sizing agent, instability of emulsifier and dispersed rosin, and improve rosin sizing efficiency, so as to achieve remarkable sizing effect, Emulsion particle performance is stable, improving the effect of paper machine operation

Active Publication Date: 2014-03-12
HANGZHOU HANGHUA HARIMA PAPER CHEM
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  • Application Information

AI Technical Summary

Problems solved by technology

[0012] In order to solve the current cationic dispersed rosin size preparation process, the solvent is not environmentally friendly, and the solvent recovery is troublesome. At the same time, the desolventization may bring instability to the emulsifier and dispersed rosin, resulting in the mechanical stability of the rosin sizing agent. No, it is not conducive to the problem of improving the efficiency of rosin sizing. The present invention provides a new type of cationic rosin sizing agent and its application in papermaking auxiliary. When the sizing agent of the present invention is used, the emulsion particle performance is stable Remarkable effect, environmentally friendly production

Method used

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  • Novel cationic rosin sizing agent and application thereof
  • Novel cationic rosin sizing agent and application thereof
  • Novel cationic rosin sizing agent and application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0049] 1. Preparation of compound emulsifier

[0050] (1) Preparation of cationic acrylate polymer emulsifier

Synthetic example 1-1

[0052] Add 20 parts of industrial acetic acid with a mass concentration of 99.8% in a reaction device equipped with a stirrer, a thermometer and a reflux condenser, mix 30 parts of styrene, 15 parts of methyl methacrylate, 10 parts of butyl acrylate, and dimethyl methacrylate Mix 15 parts of ethyl amino ethyl ester and 2 parts of dodecanethiol to make mixed monomers, then mix 1 part of azobisisobutyronitrile and mixed monomers uniformly, add them to the reaction device, and react at 85°C for 4 hours , adding deionized water to make the solid content 20%, to obtain a water-soluble copolymer, which is the cationic acrylate polymer emulsifier A1.

Synthetic example 1-2～1-5

[0054] The preparation method is the same as that in Synthesis Example 1-1, and the component ratios are shown in Table 1 to prepare cationic acrylate polymer emulsifiers A2-A5.

[0055] Table 1. Cationic acrylate polymer emulsifiers A2-A5 components (parts by weight)

[0056]

[0057] (2) Preparation of modified polyamide epichlorohydrin resin

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Abstract

The invention relates to the field of papermaking, aims at solving the problems that in the preparation process of the existing cation dispersing rosin latex, a solvent does not have a complete environment-friendly effect and is troublesome in recovery; after the solvent is removed, instability is possibly brought to an emulsifying agent and dispersed rosin, so that a rosin sizing agent is poor in mechanical stability, and the rosin sizing efficiency is not ell improved. The invention provides a novel cationic rosin sizing agent and application of the novel cationic rosin sizing agent in papermaking additive. The novel cationic rosin sizing agent comprises the following components by weight percent: 3-15% of a composite type emulsifying agent, 15-40% of modified rosin resin and 5-30% of an emulsion stabilizer; water is added into the components, so that the total solid content is 30-80%. When the sizing agent is used, emulsion particles are stable in performance, the sizing effect is remarkable, and the environment-friendly production is achieved.

Description

technical field [0001] The invention relates to the field of papermaking, in particular to a novel cationic rosin emulsion sizing agent and its application in papermaking auxiliary agents. Background technique [0002] Sizing is a process in papermaking, using sizing agents to make paper water-resistant. Sizing agent is a chemical that can make paper water-resistant, and sizing is to form a low-energy liquid-repellent film on the surface of paper through a certain process, so that paper and cardboard can resist fluid (mainly water). Usually this lyophobic film is composed of substances with low surface free energy, which are evenly distributed on the surface of the fiber, preventing or delaying the penetration and diffusion of liquid to the paper fiber. Compared with surface sizing, internal pulp sizing has the advantage of making the paper obtain overall and uniform water resistance, and at the same time, in some paper types, it prevents the surface glue from penetrating i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H21/16C08F212/08C08F220/14C08F220/18C08F220/34C08G69/48
Inventor 吕建平吕英杰朱阳荣中田智彦李彬汪曾祁
Owner HANGZHOU HANGHUA HARIMA PAPER CHEM
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