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Styrene acrylic latex for surface coating as well as preparation method and application thereof

A technology of styrene-acrylic latex and surface coating, which is applied in coatings, paper coatings, textiles and papermaking, etc. It can solve the problems of low-temperature film-forming properties, anti-back tackiness and poor adhesion, and achieve coating gloss improvement, The effect of improving the surface strength

Active Publication Date: 2013-03-20
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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  • Styrene acrylic latex for surface coating as well as preparation method and application thereof
  • Styrene acrylic latex for surface coating as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0029] 0.6 grams of potassium persulfate, 0.3 grams of sodium lauryl sulfate, 0.1 grams of sorbitan trioleate, 40 grams of water and 55 grams of mixed monomers (50 parts of butyl methacrylate, 43 parts of styrene, 7 parts of acrylic acid), stirred to obtain a homogeneous emulsion A, ready to use.

[0030] 1.5 grams of acrylic resin (acid value 150mgKOH / g, molecular weight 2000), 1.4 grams of potassium persulfate, 0.45 grams of sodium lauryl sulfate, 0.15 grams of sorbitan trioleate, 45 grams of mixed monomers ( Add 50 parts of butyl methacrylate, 48 parts of styrene, 2 parts of acrylic acid) and 125 grams of water into a 1000 mL four-necked flask equipped with a condenser, stirrer, thermometer and dropping device, stir and raise the temperature to 60 ° C, and react 1 hour; then the homogeneous emulsion A was added within 1.5 hours, kept at 70°C for 2 hours, then added 42 grams of 7% weight concentration of oxidized tapioca starch aqueous solution, continued to react for 50 min...

Embodiment 2

[0032] 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 (65 parts of ethyl methacrylate, 30 parts of styrene, 5 parts of acrylic acid), stirred to obtain a homogeneous emulsion A, ready to use.

[0033] 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,...

Embodiment 3

[0035] 0.2 grams of sodium persulfate, 0.36 grams of sodium dodecyl diphenyl ether disulfonate, 0.36 grams of dibenzyl cumylphenol polyoxyethylene ether, 20 grams of water and 75 grams of mixed monomers (40 parts of butyl acrylate ester, 50 parts of styrene, 10 parts of methacrylic acid), stirred to obtain a homogeneous emulsion A, stand-by;

[0036] 1.0 grams of acrylic resin (acid value 80mgKOH / g, molecular weight 1000), 0.8 grams of sodium persulfate, 0.24 grams of sodium dodecyl diphenyl ether disulfonate, 0.24 grams of dibenzylcumylphenol polyoxygen Add vinyl ether, 25 grams of mixed monomers (40 parts of butyl acrylate, 50 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 50 grams of 10% weight con...

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Abstract

The invention discloses styrene acrylic latex for surface coating as well as a preparation method and application thereof. The preparation method comprises the following steps of: (1) mixing initiator with 10-30% of total weight, emulsifier with 10-60% of total weight and water with 5-45% of total weight, and adding mixed monomers with 45-75% of total weight therein to obtain homogeneous emulsion A; and (2) reacting acrylic resins, remained initiator, remained emulsifier, remained mixed monomers with remained water, adding the homogeneous emulsion A of the step (1) therein for reaction, adding starch water solution for continuous reaction, cooling, neutralizing through alkali substances until the pH value is 6-9, and obtaining the styrene acrylic latex for papermaking surface coating. The styrene acrylic latex prepared by the invention can effectively overcome defects in the prior art, and has the advantage of prominently improving surface strength of coating papers and coating glossiness.

Description

technical field [0001] The invention relates to a styrene-acrylic latex and its preparation method and application, which is mainly used as a top coating 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 towards...

Claims

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Application Information

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IPC IPC(8): C08F220/18C08F220/14C08F212/08C08F220/06C08F2/30C08F2/26D21H19/20
Inventor 施晓旦周海波王养臣
Owner SHANGHAI DONGSHENG NEW MATERIALS
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