Styrene-acrylic latex for surface coating and its preparation method and application

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: 2014-10-29
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 and its preparation method and application
  • Styrene-acrylic latex for surface coating and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Mix 0.6 g of potassium persulfate, 0.3 g of sodium lauryl sulfate, 0.1 g of anhydrous pear alcohol trioleate, 40 g of water and 55 g of mixed monomers (50 parts of butyl methacrylate, 43 parts of styrene, 7 parts of acrylic acid), stir to obtain homogeneous emulsion A, set aside.

[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 anhydrous trioleate, 45 grams of mixed monomers ( 50 parts of butyl methacrylate, 48 parts of styrene, 2 parts of acrylic acid) and 125 grams of water were added to a 1000mL four-necked flask with condenser, stirrer, thermometer and dripping device, stirred and heated to 60℃, reaction 1 Hours; then add homogeneous emulsion A within 1.5 hours, keep it at 70°C for 2 hours, then add 42 grams of 7% by weight oxidized tapioca starch aqueous solution, continue the reaction for 50 minutes, cool to 25°C, and use 15 % Sodium hydroxide aqu...

Embodiment 2

[0032] 0.3 g of ammonium persulfate, 0.4 g of sodium succinate sulfonate, 0.2 g of sorbitan trioleate, 7 g of water and 60 g of mixed monomers (65 parts of ethyl methacrylate, 30 parts of styrene, 5 parts of acrylic acid), stir to obtain homogeneous emulsion A, set aside.

[0033] Mix 2 g acrylic resin (acid value 100mgKOH / g, molecular weight 2500), 0.7 g ammonium persulfate, 0.93 g sodium succinate sulfonate, 0.465 g anhydrous trioleate, 40 g mixed monomer ( 75 parts of ethyl methacrylate, 20 parts of styrene, 5 parts of acrylic acid) and 133 grams of water were added to a 1000mL four-necked flask with condenser, stirrer, thermometer and dripping device, stirred and heated to 70°C, reacted 0.5 Hours; then add the homogeneous emulsion A within 2 hours, keep it at 80°C for 1.5 hours, add 25 grams of 8% weight concentration of hydroxypropyl starch aqueous solution, continue the reaction for 0.5 hours, reduce the temperature to 30°C, and use The 20% potassium hydroxide aqueous solu...

Embodiment 3

[0035] Combine 0.2 g sodium persulfate, 0.36 g sodium lauryl diphenyl ether disulfonate, 0.36 g dibenzyl cumyl phenol polyoxyethylene ether, 20 g water and 75 g mixed monomer (40 parts butyl acrylate Ester, 50 parts styrene, 10 parts methacrylic acid), stir to obtain homogeneous emulsion A, ready for use;

[0036] 1.0 g acrylic resin (acid value 80mgKOH / g, molecular weight 1000), 0.8 g sodium persulfate, 0.24 g sodium dodecyl diphenyl ether disulfonate, 0.24 g dibenzyl cumyl phenol polyoxygen 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 were put into a 1000 mL four-necked flask with condenser, stirrer, thermometer and dropping device , Stir and warm to 60°C, react for 1 hour; then add the homogeneous emulsion A dropwise within 1 hour, keep it at 70°C for 2.0 hours, then add 50 grams of 10% starch acetate aqueous solution by weight, and continue the reaction for 0.5 After hours, the t...

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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 a preparation method and application thereof, which are mainly used as a top coat paint for papermaking coating. Background technique [0002] With the development of the paper industry, the output of coated paper has increased year by year. Adhesives play an indispensable role in paper and cardboard coatings. They not only play a role in binding pigment particles and pigments to the paper base, but also affect the stability of the coating. Rheology, etc. Most of the 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 a water-resistant coating and other properties, making synthetic latex widely used. In addition, due to the development of coating ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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