Papermaking reinforcing agent and preparation method thereof

A papermaking strengthening agent and initiator technology, applied in the field of papermaking, can solve the problems of harsh preparation process, high usage, inconvenient actual use, etc., and achieve the effect of simple preparation method, good storage stability and mild reaction process

Active Publication Date: 2020-10-02
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in general, the high concentration and high storage temperature of glyoxalated polyacrylamide products will greatly shorten the stability period of product quality
[0004] The U.S. Patent No. US4603176 discloses a preparation method of a temporary wet-strength polymer of glyoxal-modified polyacrylamide. During the preparation process, hydrophobic monomers with a specified molar ratio are added, but the preparation process is too strict. Harsh, difficult product quality control; Patent No. US3556932 U.S. Patent discloses the preparation of glyoxal modified polyacrylamide by glyoxal and cationic polyacrylamide reaction under weakly alkaline conditions, but when it is used as wet strength agent The usage amount is too high and has no practical value; the Chinese patent with the publication number

Method used

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  • Papermaking reinforcing agent and preparation method thereof
  • Papermaking reinforcing agent and preparation method thereof
  • Papermaking reinforcing agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0025] The invention provides a preparation method of a papermaking reinforcing agent, comprising: S1) polymerizing a first cationic monomer, acrylamide and a second cationic monomer under the action of an initiator to obtain a base polymer; the first The cationic monomer and the second cationic monomer are both quaternary ammonium salt cationic monomers with different types; S2) after mixing the weakly basic catalyst with the base polymer in water, adjust the pH value to weakly basic, and then add glyoxal, stirring and reacting to obtain a papermaking strengthening agent.

[0026] Wherein, in the present invention, there is no special restriction on the source of the reaction raw materials, and it may be commercially available.

[0027] According to the present invention, the first cationic monomer and the second cationic monomer are both quaternary ammonium salt cationic monomers with different types, preferably each independently is a diallyl quaternary ammonium salt cation...

Example Embodiment

[0040] Example 1

[0041] 56.9g of distilled water and 18g of DAD were added to a 500ml round-bottomed flask equipped with a condenser tube, a stirrer, a nitrogen inlet and a feeding port, and 28.6g of acrylamide, 5g of BZ-80 and 0.4g of mass concentration were added dropwise after being passed through nitrogen for 30 minutes. A 10% aqueous solution of ammonium persulfate and sodium bisulfite was heated to 80°C and reacted for 5h. After cooling to room temperature, the base polymer 2 was obtained by precipitation with acetone and vacuum drying.

Example

[0042] Examples 2 to 4

[0043] The preparation method of base polymer 3~base polymer 5 is the same as that of embodiment 1, and the feeding formula is shown in Table 1.

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PUM

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Abstract

The invention provides a preparation method of a papermaking reinforcing agent, which comprises the following steps: S1) carrying out polymerization reaction on a first cationic monomer, acrylamide and a second cationic monomer under the action of an initiator to obtain a base polymer, wherein the first cationic monomer and the second cationic monomer are quaternary ammonium salt cationic monomersand are different in type; S2) mixing a weakly alkaline catalyst with the base polymer in water, adjusting the pH value to be weakly alkaline, then adding glyoxal, and stirring the mixture for reaction to obtain the papermaking reinforcing agent. Compared with the prior art, the papermaking reinforcing agent provided by the invention is simple in preparation method and mild in reaction process, and the obtained papermaking reinforcing agent is relatively good in storage stability.

Description

technical field [0001] The invention belongs to the technical field of papermaking, in particular to a papermaking reinforcing agent and a preparation method thereof. Background technique [0002] Papermaking process chemicals include polymer synthetic substances used for strengthening, retention, and drainage. These additives are called strengthening agents, retention aids, and drainage aids. Making full use of new high-efficiency papermaking chemicals is the main means for the papermaking industry to improve production efficiency and product quality, reduce costs and reduce pollution. Among them, a class of fine chemicals used to enhance the strength of paper and cardboard is called paper strengthening agent. Papermaking strengthening agents can be divided into dry strength agents and wet strength agents according to different effects. [0003] Dry strength agent is a fine chemical that improves the physical strength (stiffness, tensile strength, ring compression strengt...

Claims

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Application Information

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IPC IPC(8): C08F220/56C08F226/02C08F220/34C08F8/00D21H17/45D21H21/18D21H21/20
CPCC08F8/00C08F220/56C08F2800/20D21H17/455D21H21/18D21H21/20C08F226/02C08F220/34
Inventor 王丕新谭颖徐昆迟惠白云刚张文德
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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