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Preparation method and application of papermaking coating styrene-acrylic latex

A technology for fabricating styrene-acrylic adhesives and emulsions, which can be used in papermaking, paper coatings, textiles and papermaking, etc., and can solve the problems of low-temperature film-forming properties and poor adhesion resistance.

Active Publication Date: 2013-12-25
SHANGHAI DONGSHENG NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Styrene-acrylic latex has the characteristics of heat resistance and weather resistance, but there are also some obvious shortcomings, such as polyacrylate emulsions have problems such as low-temperature film-forming properties, anti-adhesion, and insufficient adhesion, so in order to overcome the above shortcomings , we need to improve the performance of

Method used

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  • Preparation method and application of papermaking coating styrene-acrylic latex

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 0.15 grams of potassium persulfate, 0.15 grams of sodium dodecylbenzenesulfonate, 0.15 grams of nonylphenol polyoxyethylene ether, 52 grams of water and 50 grams of mixed monomers (70 parts of isooctyl acrylate, 27 parts of styrene, 3 parts of acrylic acid), stirred to obtain a homogeneous emulsion A, ready to use.

[0034] 3.0 grams of acrylic resin (acid value 250mgKOH / g, molecular weight 4500), 2.85 grams of potassium persulfate, 1.35 grams of sodium dodecylbenzenesulfonate, 1.35 grams of nonylphenol polyoxyethylene ether, 50 grams of mixed monomers (70 parts of isooctyl acrylate, 27 parts of styrene, 3 parts of acrylic acid) and 185 grams of water were added to a 1000 mL four-neck flask equipped with a condenser, stirrer, thermometer and dropping device, and the temperature was raised to 85°C with stirring, and the reaction was 0.5 hour; then add the homogeneous emulsion A within 2.5 hours, keep it warm at 90°C for 1 hour, then add 16 grams of phosphate starch aqueo...

Embodiment 2

[0036] 0.1 gram of sodium persulfate, 0.15 gram of sodium dodecyl diphenyl ether disulfonate, 0.15 gram of dibenzylcumylphenol polyoxyethylene ether, 20 grams of water and 80 grams of mixed monomer (20 parts of butyl acrylate ester, 70 parts of styrene, 10 parts of methacrylic acid), stirred to obtain a homogeneous emulsion A, stand-by;

[0037] 1.0 grams of acrylic resin (acid value 80mgKOH / g, molecular weight 1000), 0.4 grams of sodium persulfate, 0.15 grams of sodium dodecyl diphenyl ether disulfonate, 0.15 grams of dibenzylcumylphenol polyoxygen Add vinyl ether, 20 grams of mixed monomers (20 parts of butyl acrylate, 70 parts of styrene, 10 parts of methacrylic acid) and 30 grams of water into a 1000 mL four-necked flask equipped with a condenser, stirrer, thermometer and dropping device , stirred and heated to 60°C, and reacted for 1 hour; then the homogeneous emulsion A was added dropwise within 1 hour, kept at 70°C for 2.0 hours, and then 40 grams of 10% weight concentr...

Embodiment 3

[0039] 0.3 grams of ammonium persulfate, 0.4 grams of sodium sulfosuccinate, 0.2 grams of sorbitan trioleate, 7 grams of water and 60 grams of mixed monomers (75 parts of ethyl methacrylate, 20 parts of styrene, 5 parts of acrylic acid), stirred to obtain a homogeneous emulsion A, ready to use.

[0040] 2 grams of acrylic resin (acid value 100mgKOH / g, molecular weight 2500), 0.7 grams of ammonium persulfate, 0.93 grams of sodium sulfosuccinate, 0.465 grams of sorbitan trioleate, 40 grams of mixed monomers ( Add 75 parts of ethyl methacrylate, 20 parts of styrene, 5 parts of acrylic acid) and 133 grams of water into a 1000mL four-neck flask equipped with a condenser, stirrer, thermometer and dropping device, stir and heat up to 70°C, and react for 0.5 hour; then the homogeneous emulsion A was added within 2 hours, kept at 80°C for 1.5 hours, then added 25 grams of 8% weight concentration of hydroxypropyl starch aqueous solution, continued to react for 0.5 hours, cooled to 30°C,...

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Abstract

The invention provides a preparation method and application of a papermaking coating styrene-acrylic latex. The preparation method comprises the following steps: (1) evenly mixing 5-40 wt% of initiator, 10-50 wt% of emulsifier and 5-30 wt% of water, and adding 50-80 wt% of mixed monomers to obtain a homogeneous emulsion A, wherein the mixed monomers are composed of (methyl) acrylate, (methyl) styrene and (methyl) acrylic acid; and (2) reacting acrylic resin, the rest of initiator, the rest of emulsifier, the rest of mixed monomers and the rest of water, dropwisely adding the homogeneous emulsion A obtained in the step (1) to react, adding a starch water solution, continuing the reaction, and neutralizing with an alkaline matter until the pH value is 6-9, thereby obtaining the papermaking coating styrene-acrylic latex. By using the method of adding the acrylic resin through the kettle bottom and adding the coating starch subsequently, the bonding property of the styrene-acrylic latex is greatly enhanced, and the smoothness of the coated paper is improved.

Description

technical field [0001] The invention relates to a preparation method and application of styrene-acrylic latex, which is mainly used as an undercoating paint for papermaking coating. Background technique [0002] With the development of the paper industry, the output of coated paper is increasing year by year. Adhesives are indispensable in paper and cardboard coatings. They not only play a role in bonding pigment particles, pigments and paper base, but also affect the stability of coatings. Rheology etc. The vast majority of adhesives for paper and cardboard coatings are water-soluble, which can be divided into water-soluble adhesives such as starch, polyvinyl alcohol, etc., and synthetic polymer latex, such as styrene-butadiene latex, styrene-acrylic latex, etc., because synthetic latex has thermoplasticity And the ability to form water-resistant coatings and other properties makes synthetic latex widely used. In addition, due to the development of coating technology towa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J151/00C09J151/02C08F265/00C08F220/18C08F220/14C08F212/08C08F212/12C08F220/06C08F251/00C08F2/26C08F2/30D21H19/12D21H21/14
Inventor 施晓旦周海波王养臣
Owner SHANGHAI DONGSHENG NEW MATERIALS
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