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Additive for papermaking

A technology of additives and polymers, applied in the direction of papermaking, textiles and papermaking, non-fiber pulp addition, etc., can solve unsatisfactory problems, achieve excellent drainage, excellent filler retention, and excellent paper strength improvement effect

Inactive Publication Date: 2010-12-08
SEIKO PMC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, it has not been able to meet the requirements of additives for papermaking that are excellent in improving the paper strength and have excellent water drainage and retention of fillers.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0114] Add 483 parts of water, 267.06 parts of 50% acrylamide aqueous solution, 1.57 parts of dimethylaminoethyl methacrylate, 76% methyl 18.67 parts of dimethylaminoethyl acrylate aqueous solution of benzyl ammonium chloride, 5.2 parts of itaconic acid, 1.19 parts of N,N-dimethylacrylamide, 1.49 parts of sodium methallylsulfonate, and then add 30% 1.8 parts of sulfuric acid aqueous solution was adjusted to pH 3.0, and the temperature was raised to 60° C. under a nitrogen atmosphere. Next, 4.56 parts of a 5% ammonium persulfate aqueous solution was added as a polymerization initiator to start polymerization, and the temperature was raised to 90° C. under a nitrogen atmosphere, and the temperature was maintained. 9.12 parts of a 5% ammonium persulfate aqueous solution was added 1 hour after the start of the polymerization, and 2 hours after the start of the polymerization, it was cooled to room temperature to stop the polymerization. The solid content of the obtained papermaki...

Embodiment 2、3

[0116] As shown in Table 1, except having changed the kind and quantity of the components (a)-(e) in Example 1, it carried out similarly to Example 1, and obtained the additive for papermaking. Table 2 shows properties of the obtained papermaking additives.

Embodiment 4

[0118]Add 835.94 parts of water, 77.72 parts of methacrylamide, 7.86 parts of dimethylaminoethyl methacrylate, 64.7% 2-hydroxy -N,N,N,N',N'-pentamethyl-N'-[3-{(1-oxo-2-propenyl)amino}propyl]-1,3-propanediammonium dichloride 5.32 parts of aqueous solution, 2.6 parts of itaconic acid, 0.49 parts of maleic anhydride, 0.07 parts of N,N-dimethylacrylamide, 0.02 parts of methylenebisacrylamide, 0.16 parts of sodium methallylsulfonate, and then add 8.0 parts of 30% sulfuric acid aqueous solution was adjusted to pH 3.0, and it heated up to 60 degreeC in nitrogen atmosphere. Next, 2.28 parts of a 5% ammonium persulfate aqueous solution was added as a polymerization initiator to start polymerization, and the temperature was raised to 90° C. under a nitrogen atmosphere, and the temperature was maintained. 4.56 parts of a 5% ammonium persulfate aqueous solution was added 1 hour after the start of the polymerization, and 2 hours after the start of the polymerization, it was cooled to room...

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Abstract

An object of the invention is to provide an additive for papermaking containing amphiprotic acrylamide polymer, which has excellent paper force improvement effect, excellent water filtration character and stuffing preserving rate. The additive for papermaking containing amphiprotic acrylamide polymer is characterized in that it has a specific relationship, the weight average molecular weight / average number molecular weight, intrinsic viscosity, gyroradius, solid content, viscosity coefficient, PH and light transmittance ratio are specific scope, and is obtained by performing polymerization using specific amount of specific monomer.

Description

technical field [0001] The present invention relates to additives for papermaking. More specifically, it relates to an additive for papermaking containing an amphoteric acrylamide polymer. Background technique [0002] From the perspective of deterioration of raw material supply and cost, the use of raw pulp is limited, and the necessity of using old paper for energy saving and effective use of resources is further enhanced, and the closed circulation rate of white water is increased according to drainage regulations, resulting in The amount of salt and inclusions in the papermaking system is increasing day by day. [0003] Therefore, additives for papermaking that are excellent in improving paper strength and have excellent water drainage and filler retention compared with the past have always been the goal pursued by people. [0004] As an example of such an additive for papermaking, it has been proposed to use an acrylamide polymer obtained by polymerizing an acrylamide...

Claims

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Application Information

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IPC IPC(8): D21H17/45D21H17/43
Inventor 马场勇治佐藤健小国正祥
Owner SEIKO PMC CORP
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