Polyacrylamide-based additive for papermaking, method for producing same, and method for producing paper

A polyacrylamide-based, polyacrylamide technology, used in papermaking, reinforcing agent addition, textiles and papermaking, etc., can solve the problems of paper strength enhancement effect and unsatisfactory water drainage, and achieve good water drainage and paper production. Excellent force enhancement effect

Active Publication Date: 2020-10-16
SEIKO PMC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, these are not fully satisfactory in terms of paper strength enhancement effect and water drainage

Method used

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  • Polyacrylamide-based additive for papermaking, method for producing same, and method for producing paper
  • Polyacrylamide-based additive for papermaking, method for producing same, and method for producing paper
  • Polyacrylamide-based additive for papermaking, method for producing same, and method for producing paper

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0083] The following examples and comparative examples are given to further specifically describe the present invention, but the present invention is not limited by these examples. It should be pointed out that in each example, unless otherwise stated, parts and % are based on mass. The physical property value of each example is the value measured by the following method.

[0084] The number average molecular weight, weight average molecular weight, and molecular weight distribution were obtained by the GPC-MALS method in which a multi-angle light scattering detector was connected to the GPC under the following measurement conditions.

[0085] HPLC: Agilent1100 series

[0086] Column: Showa Denko Co., Ltd. SHODEX SB806MHQ

[0087] Eluent: Phosphate buffer containing sodium nitrate (pH3)

[0088] Flow rate: 1.0ml / min

[0089] Detector 1: Multi-angle Light Scattering Detector DAWN manufactured by Wyatt Technologies, USA

[0090] Detector 2: Differential Refractive Index Det...

manufacture example 1

[0093] Put water 260.00g, 50% acrylamide aqueous solution 126.81g, dimethylacrylamide 0.10g, 30 15.60 g of aqueous sulfuric acid solution, 15.72 g of dimethylaminoethyl methacrylate, and 1.27 g of sodium methacrylate. Next, the temperature was raised to 60° C. under a nitrogen atmosphere, 0.24 g of ammonium persulfate was added as a polymerization initiator to start polymerization, and the reaction temperature was raised to 90° C. Thereafter, 180.00 g of water, 132.49 g of a 50% aqueous solution of acrylamide as monomers (2), 0.10 g of dimethylacrylamide, 5.40 g of acrylic acid, and 1.27 g of sodium methacrylsulfonate were added, and ammonium persulfate was further added. 0.48 g, when the estimated viscosity at 25° C. reached 3000 mPa·s, 290.0 g of water was immediately added to obtain an amphoteric polyacrylamide copolymer (a-1) with a solid content of 15.0%. Table 1 shows the measurement results of the proportion (mol %), number average molecular weight, weight average mole...

manufacture example 2～14、 comparative manufacture example 1～6

[0095] Except that the composition of monomers (1) and monomers (2) has been changed as shown in Table 1, it is all carried out the same as Manufacturing Example 1, and an amphoteric polyacrylamide copolymer ( a-2)~(a-14), (ra-1)~(ra-6). Ratio (mol%), number average molecular weight, weight average molecular weight, molecular weight The measurement results of the distribution are given in Table 1.

[0096] [Table 1]

[0097]

[0098] The meanings of the abbreviations in Table 1 are as follows:

[0099] AAm: acrylamide

[0100] DM: Dimethylaminoethyl methacrylate

[0101] DMC: 2-(methacryloyloxy)-N,N,N-trimethylethylammonium chloride

[0102] (2-(methacryloyloxy)-N,N,N-trimethylethanammonium chloride)

[0103] DPA: N-(2-dimethylaminoethyl)acrylamide (N-[2-(dimethylamino)ethyl]acrylamide)

[0104] DADMAC: Diallyl Dimethyl Ammonium Chloride

[0105] IA: itaconic acid

[0106] AGA: 2‐Acrylamide-N-glycolic acid

[0107] AAc: acrylic acid

[0108] SMAS: Sodium Methacry...

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Abstract

The present invention pertains to: a polyacrylamide-based papermaking additive including an aldehyde-functionalized polyacrylamide which has excellent paper-strengthening effects and provides satisfactory water-filterability; and a method for producing paper by using the polyacrylamide-based papermaking additive. The polyacrylamide-based papermaking additive includes an aldehyde-functionalized polyacrylamide (A) which is a dialdehyde compound adduct of an amphoteric polyacrylamide copolymer (a) including, as polymer structural units, (meth)acrylamide, a cationic vinyl monomer, an anionic vinyl monomer, and a (meth)allyl-group-including monomer, and which is characterized by satisfying various conditions.

Description

technical field [0001] The present invention relates to a polyacrylamide-based papermaking additive containing an aldehyde-functionalized polyacrylamide having excellent paper strengthening effect and good water drainage, and a method for producing the same, and also to a paper production method using the polyacrylamide-based papermaking additive. Background technique [0002] Various aldehyde-functionalized polyacrylamide-based additives for papermaking are used in the papermaking process in order to improve paper productivity and paper quality accompanying the increase in the speed of paper machines. Aldehyde-functionalized polyacrylamide is generally produced through a process of reacting a dialdehyde compound, ie, glyoxal, with polyacrylamide. Aldehyde-functionalized polyacrylamide not only contains amino groups with high hydrogen bonding capacity in the polymer structure, but also contains aldehyde groups with reactivity with cellulose. Therefore, it can form a covalen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H17/41
CPCD21H17/41D21H21/18
Inventor 虾名雄贵吉谷孝治茨木英夫
Owner SEIKO PMC CORP
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