Preparation of cation surface sizing agent emulsion

A technology of surface sizing agent and cationic etherifying agent, which is applied in the field of preparation of cationic surface sizing agent emulsion, can solve the problems that the surface strength, folding resistance and solvent resistance cannot be taken into account, and the application range of secondary fibers is limited. To achieve the effect of convenient acquisition of raw materials, expanded reuse, and a wide range of types

Active Publication Date: 2008-12-24
SHAANXI BANGXI CHEM
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Problems solved by technology

[0005] The purpose of the present invention is to provide a preparation method of cationic surface sizing agent emulsion, which solves the problem that conventional polymer surface sizing agents cannot take into account surface strength, folding resistance and solvent resistance, and prevents surface sizing from completely replacing the internal surface of slurry. Sizing, a technical problem that limits the application range of secondary fibers

Method used

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  • Preparation of cation surface sizing agent emulsion
  • Preparation of cation surface sizing agent emulsion
  • Preparation of cation surface sizing agent emulsion

Examples

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Embodiment 1

[0068] Mix polyvinyl alcohol 1099 and water uniformly at a mass ratio of 1:9 to obtain a 10% polyvinyl alcohol solution, that is, polymer colloid stabilizer solution A. 5% of 3-chloro-2-hydroxypropyltrimethylammonium chloride relative to the amount of polyvinyl alcohol was added to the polyvinyl alcohol solution at 80°C. The pH was adjusted to 10 with ammonia and reacted for 1 hour. Adjust its pH to 5 with hydrochloric acid to prepare a modified polyvinyl alcohol solution, namely modified polymer colloid stabilizer B. Mix butyl acrylate, styrene and methylol acrylamide uniformly at a mass ratio of 1:1:0.4 to prepare solution C. Mix water and potassium persulfate uniformly at a mass ratio of 1:0.06 to obtain an aqueous initiator solution D. Mix the modified polyvinyl alcohol solution and water uniformly at a mass ratio of 100:1000 to obtain solution E. At 85°C, add methacryloyloxyethyltrimethylammonium chloride, solution C and initiator aqueous solution D to solution E dropw...

Embodiment 2

[0070] Mix polyvinyl alcohol 1799 and water at a mass ratio of 1:9 to obtain a 10% polyvinyl alcohol solution, that is, polymer colloid stabilizer solution A. Then, at 95° C., 8% of 3-chloro-2-hydroxypropyltrimethylammonium chloride relative to the amount of polyvinyl alcohol was added to the solution polyvinyl alcohol solution. At the same time, the pH was adjusted to 11 with sodium hydroxide, and the reaction was carried out for 1.5 hours. Adjust its pH to 5 with sulfuric acid to prepare a modified polyvinyl alcohol solution, namely modified polymer colloid stabilizer B. Methyl methacrylate, stearyl acrylate, butyl methacrylate and methylol acrylamide were uniformly mixed at a mass ratio of 1:0.1:1:0.5 to prepare solution C. Water and ammonium persulfate-sodium (hydrogensulfite) were uniformly mixed at a mass ratio of 1:0.02 to obtain an aqueous initiator solution D. Mix the solution-modified polyvinyl alcohol solution and water uniformly at a mass ratio of 100:800 to obta...

Embodiment 3

[0072] Mix polyvinyl alcohol 0588 and water uniformly at a mass ratio of 1:9 to obtain a polyvinyl alcohol solution, that is, polymer colloid stabilizer solution A. At 90°C, 10% cationic etherifying agent 2,3-epoxypropyltrimethylammonium chloride relative to the amount of polyvinyl alcohol was added to the polyvinyl alcohol solution. At the same time, the pH was adjusted to 11 with potassium hydroxide and reacted for 1 hour. Adjust its pH to 6 with nitric acid to prepare a modified polyvinyl alcohol solution, namely modified polymer colloid stabilizer B. Solution C was prepared by uniformly mixing butyl methacrylate, styrene, and acetoacetoxy ethyl methacrylate at a mass ratio of 0.8:1:0.5. Water and ammonium persulfate were uniformly mixed at a mass ratio of 1:0.06 to obtain an aqueous initiator solution D. Mix the modified polyvinyl alcohol solution and water uniformly at a mass ratio of 100:900 to obtain solution E. Then, at 85°C, dimethylaminoethyl methacrylate, benzyl ...

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Abstract

The invention relates to a method for preparing a cationic surface sizing agent emulsion, comprising the following steps that: a polymer colloid stabilizer solution A is obtained by uniform mixture of a polymer colloid stabilizer and water; the polymer colloid stabilizer solution A is added with a cationic etherifying agent, and a modified polymer colloid stabilizer B is obtained by utilization of alkali to adjust the pH value of the mixture to between 7 and 14 and then utilization of acid to adjust the pH value of the mixture to between 1 and 6; a solution C is obtained by uniform mixture of a vinyl monomer and a self-crosslinking monomer; an initiator water solution D is obtained by uniform mixture of water and water-soluble initiator; a solution E is obtained by uniform mixture of the modified polymer colloid stabilizer B and water; and the cationic surface sizing agent emulsion is obtained by heat insulation and reaction after addition of a cationic monomer, the solution C and the initiator water solution D into the solution E. The method solves the problem in the prior art that the surface strength, the folding resistance and the solvent resistance of polymers can not be simultaneously considered so as to make the application range of secondary fibers be limited. The cationic surface sizing agent emulsion has good binding property and film-forming property; the variety of raw materials is wide; and the selection is flexible.

Description

technical field [0001] The invention relates to a preparation method of a polymer surface sizing agent, in particular to a preparation method of a cationic surface sizing agent emulsion. Background technique [0002] At present, polymer surface sizing agents mainly include styrene-maleic anhydride copolymer (SMA), styrene-acrylic acid copolymer aqueous solution (SAA), styrene-acrylate emulsion copolymer (SAE), water-based polyurethane latex (PUD ) and so on. [0003] Polymer surface sizing agents need organic solvents or surfactants in the preparation process, and have high foaming properties. For example: styrene-maleic anhydride copolymer and styrene-acrylic acid copolymer aqueous solutions are prepared by organic solvent polymerization, which will cause certain pollution to the manufacturing environment and application environment, and affect the operation and the health of users . [0004] Existing polymer surface sizing agents cannot balance the surface strength, fol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/10C08F2/44C08F2/22C08K5/19D21H21/16
Inventor 沈一丁张永欣费贵强王海花
Owner SHAANXI BANGXI CHEM
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