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Papermaking retention and drainage reinforcing agent

A technology of retention and drainage aid and reinforcing agent, which is applied in the field of papermaking aid processing, can solve the problems of inability to fully improve paper strength, insufficient paper texture, poor performance and storage stability, and achieve the effect of excellent storage stability.

Inactive Publication Date: 2018-12-25
云梦嘉邦斯新型材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to this method, it is possible to obtain a dispersion that can improve drainage and retention, but in the case of using the dispersion obtained by this method, the strength of the paper cannot be sufficiently improved; in addition, since a uniform dispersion cannot be obtained, the The quality of the paper is insufficient; further, the dispersion liquid obtained by this method produces sediment during storage, and there is a problem of storage stability such as poor performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

manufacture example 1

[0054] (Production example 1) Production of polymer dispersant

[0055] In a 2-liter five-necked liquid separator (separableflask) with a stirrer, a thermometer, a reflux cooling pipe, and a nitrogen inlet pipe, add an 80% aqueous solution of 228.48% of acrylic acid-N,N-dimethylaminoethyl chloride methyl quaternary ammonium salt g (weight of pure compound 182.784g; 79.73 mol%), 0.09g (0.05 mol%) sodium methallylsulfonate, 0.23g (0.2 mol%) N, N-dimethylacrylamide, 0.059g ( 0.02 mol %) 1,3,5-triacryloylhexahydro-1,3,5-triazine, 16.83 g (20 mol %) acrylamide, and 533.9 g of ion-exchanged water were heated to 60° C. and replaced with nitrogen. Thereto was added 20 g of a 2% aqueous solution of 2,2'-azobis(2-amidinopropane) hydrochloride as a polymerization initiator, and polymerization was started under stirring. The reaction was carried out for 2 hours to obtain a polymer dispersant having a branched chain structure.

manufacture example 2

[0056] (Production example 2) Production of polymer dispersant

[0057] Add 228.19g (182.552g of pure compound weight; 79.63mol%) of acrylic acid-N,N-dimethylamino 80% aqueous solution of ethyl chloride methyl quaternary ammonium salt, 0.37g (0.2 mol%) sodium methallylsulfonate, 0.12g (0.1 mol%) N, N-dimethylacrylamide, 0.1277g (0.07 mol%) %) methylenebisacrylamide, 16.83g (20mol%) acrylamide, 533.96g ion-exchanged water, heated to 60°C and replaced with nitrogen. Thereto was added 20 g of a 2% aqueous solution of 2,2'-azobis(2-amidinopropane) hydrochloride as a polymerization initiator, and polymerization was started under stirring. The reaction was carried out for 2 hours to obtain a polymer dispersant having a branched chain structure.

Embodiment 1

[0067] (Example 1) Production of Water-Soluble Polymer Dispersion

[0068] In a five-necked separatory flask of 2 liters with a stirrer, a thermometer, a reflux cooling pipe, and a nitrogen inlet pipe, in 1030.3 g of ion-exchanged water, dissolve 110 g of the polymer dispersant with a branched chain structure obtained in Manufacturing Example 1 ( 20% of non-volatile matter; 5.5 weight part) and 400 g of ammonium sulfates with respect to 100 weight part of obtained (A) components. Add 216.38g (74.995mol%) acrylamide, 196.48g (157.184g of pure compound weight; 20mol%) 80% aqueous solution of acrylic acid-N, N-dimethylaminoethyl methyl chloride quaternary ammonium salt, 26.4 g (5 mol%) itaconic acid, 0.0313g (0.005 mol%) methylenebisacrylamide, heated to 45°C and replaced with nitrogen. 20 g of a 2% aqueous solution of 2,2'-azobis(2-amidinopropane) hydrochloride was added thereto as a polymerization initiator, and polymerized under stirring for 24 hours to obtain a water-soluble...

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Abstract

The invention provides a papermaking retention and drainage reinforcing agent. The papermaking retention and drainage reinforcing agent is dispersion liquid. Water-soluble polymers (A) are dispersed in brine solution by the aid of polymeric dispersants (B) to obtain the dispersion liquid, the salinity of the brine solution is higher than, by weight, 10% and is lower than the saturation concentration, the average particle size of the dispersion liquid is 0.1-100 micrometers, the dispersion liquid comprises, by weight, 10-40% of water-soluble polymers (A), the viscosity of the dispersion liquidat the temperature of 25 DEG C is 3000-20000 mPa s, the polymeric dispersants (B) are polymeric dispersants, the polymeric dispersants comprise polymerization components including, by molar mass, 10-99.979% of positive ion radical polymer monomers (b1), 0.01-1% of (methyl) allyl monomers (b2), 0.001-0.1% of cross-linking monomers (b3) and 0.01-1% of N-substituted (methyl) acrylamides (b4), the polymerization components are copolymerized to obtain the polymeric dispersants, the N-substituted (methyl) acrylamides (b4) are represented by a general formula CH2=C(R1)-CONR2(R2), the R1 in the formula represents hydrogen atoms or methyl, the R2 independently represents linear-chain or branched-chain alkyl, and the carbon atom number of the linear-chain or branched-chain alkyl is 1-4.

Description

technical field [0001] The invention relates to the field of papermaking aids processing, in particular to a retention and drainage enhancer for papermaking. Background technique [0002] Paper is attracting attention as a recyclable resource, and for paper and cardboard raw materials whose strength has been reduced due to reuse, paper strength enhancers are often used to reinforce the strength. [0003] As paper strengthening agent, acrylamide macromolecules are widely used. Usually, acrylamide macromolecules are obtained by copolymerization of acrylamide etc. with other polymerizable monomers in aqueous solution. The applicant has also proposed various paper strength enhancing agents ( See, for example, Patent Document 1 and Patent Document 2, etc.). However, by reusing paper for repeated use, the pulp used as paper raw material becomes short-fibered and deteriorated, and the concentration of inorganic substances or impurities in the papermaking system increases, making i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H21/10D21H21/18D21H17/37C08F220/34
CPCD21H21/10C08F220/34D21H17/37D21H21/18C08F228/02C08F220/56C08F226/06
Inventor 蔡群波
Owner 云梦嘉邦斯新型材料有限公司
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