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Vinyl acetate-acrylic emulsion and preparation method thereof

A technology of vinegar-acrylic emulsion and acrylate, which is applied in the coating field of coated paper, can solve the problems of poor surface strength of paper, achieve the effect of enhancing surface strength and improving the phenomenon of lint and powder falling

Inactive Publication Date: 2016-06-29
SHANGHAI DONGSHENG NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The prepared emulsion is applied to paper coating, and the fluidity and water resistance of the coating are good, but the paper surface strength is poor after coating on paper

Method used

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  • Vinyl acetate-acrylic emulsion and preparation method thereof
  • Vinyl acetate-acrylic emulsion and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Synthesis of vinegar-acrylic emulsion:

[0027] a) Mix 25g of n-butyl acrylate, 70g of vinyl acetate, 2g of acrylic acid and 0.1g of n-dodecanethiol to make a mixed monomer, and set aside.

[0028] b) Add 0.63g of allyl polyoxyethylene ether ammonium sulfate, 0.2g of potassium persulfate, 3g of 2-methyl-2 acrylate-2 hydroxyethyl phosphate and 35.7g of the mixed monomers in the 97.1ga) step Dissolve the ionic water into an aqueous solution, stir at high speed for 30 minutes, and set aside.

[0029] e) In an aqueous solution of 0.07g allyl polyoxyethylene ether ammonium sulfate, 0.3g potassium persulfate and 15.3g deionized water, react at 70°C for 40 minutes, and then add the mixed solution in step b) dropwise for 5 hours .

[0030] f) Incubate at 70°C for 2 hours. Cool down to 25° C., neutralize with 4 g of ammonium hydroxide aqueous solution with a solid content of 10% by weight, and continue stirring for 10 minutes. Filter through a 100-mesh sieve to obtain a styr...

Embodiment 2

[0032] Synthesis of vinegar-acrylic emulsion:

[0033] a) Mix 68g of ethyl acrylate, 30g of vinyl acetate, 1g of methacrylic acid and 0.5g of tert-dodecylmercaptan to prepare mixed monomers. spare.

[0034] b) Add 1.8g of allyl polyoxyethylene ether, 4.05g of sodium persulfate, 1g of N-acryloylthiourea and 65.7g of deionized water to dissolve the mixed monomers in step 79.6ga) into an aqueous solution, and stir at high speed for 30 minutes. spare.

[0035] c) Add the mixed monomers in step 19.9ga) into an aqueous solution of 2.7g allyl polyoxyethylene ether, 0.45g sodium persulfate and 98.55g deionized water, react at 95°C for 10 minutes, and then add b ) step of the mixed solution for 1 hour.

[0036] d) Incubate at 70°C for 1 hour. Cool down to 25°C, neutralize with 20 g of aqueous sodium hydroxide solution with a solid content of 40% by weight, and continue stirring for 10 minutes. Filter through a 100-mesh sieve to obtain a styrene-acrylic emulsion with a solid conten...

Embodiment 3

[0038] Synthesis of vinegar-acrylic emulsion:

[0039] a) Mix 20g of methyl methacrylate, 27g of 2-ethylhexyl acrylate, 50g of vinyl acetate, 1.5g of itaconic acid and 0.3g of n-butyl mercaptan to make a mixed monomer. spare.

[0040] b) Add 1.5g of vinyl polyoxyethylene ether, 1.5g of ammonium persulfate, 1.5g of N-methylolacrylamide and 50.15g of deionized water to dissolve the mixed monomers in step 88.92ga) into an aqueous solution, and stir at high speed for 30 minutes . spare.

[0041] e) Add the mixed monomers in step 9.88ga) to an aqueous solution of 1.5g vinyl polyoxyethylene ether, 1.5g ammonium persulfate and 50.15g deionized water, react at 80°C for 20 minutes, and then add b) dropwise Step mixture for 3 hours.

[0042] f) Incubate at 70°C for 2 hours. Cool down to 25°C, neutralize with 10 g of aqueous potassium hydroxide solution with a solid content of 20% by weight, and continue stirring for 10 minutes. Filter through a 100-mesh sieve to obtain a styrene-a...

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Abstract

A kind of vinegar acrylic emulsion and preparation method thereof, the specific steps include: mixing (meth)acrylic acid ester, vinyl acetate, carboxylic acid monomer and chain transfer agent to make monomer; % of the mixed monomer is uniformly mixed with 40-90% reactive emulsifier, 40-90% by weight initiator, and functional monomer in the weight percentage; body with 10-60% by weight of emulsifier and 10-60% by weight of initiator, react at 70°C-95°C for 10-40 minutes, and then drop the mixed solution for 1-5 Hours; keep warm at 70-95°C for 1-2 hours, then cool down to 25°C, adjust the pH to 5-8 to obtain vinegar-acrylic emulsion. This product is used in the coating of coated paper, which can significantly enhance the surface strength of coated paper and improve the phenomenon of lint and powder falling.

Description

technical field [0001] The invention relates to a coating for coated paper, in particular to an acrylic acetate emulsion and a preparation method thereof. Background technique [0002] Emulsions are widely used in the bonding of paper coatings. In the application process, the performance requirements of emulsions are getting higher and higher. With the improvement and development of emulsion application technology, the emulsion is required to have good process applicability, among which the most important thing is the cohesiveness of styrene-acrylic emulsion. The application of emulsion in paper coating can significantly improve the surface strength of paper and reduce the phenomenon of paper shedding and dusting. [0003] Chinese patent CN101280035A discloses a method for preparing an emulsion, which uses styrene, butyl acrylate, methyl methacrylate, acrylic acid, functional monomers containing urea groups, composite emulsifiers, and thermal decomposition initiators as raw...

Claims

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Application Information

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IPC IPC(8): C08F283/06C08F218/08C08F220/18C08F220/14C08F220/06C08F230/02C08F220/60C08F220/58C08F2/24
Inventor 施晓旦尹东华
Owner SHANGHAI DONGSHENG NEW MATERIALS
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