Preparation method of high temperature resistant film-forming styrene-acrylic emulsion for paper product printing

A styrene-acrylic emulsion, high-temperature-resistant technology, applied in applications, household utensils, inks, etc., can solve problems such as high glass transition temperature, achieve low film-forming temperature, improve polymerization stability and temperature resistance, and reduce VOCs emissions Effect

Pending Publication Date: 2019-12-20
WUHAN DESYTEK ENVIRONMENTAL PROTECTION NEW MATERIAL CO LTD
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  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

At present, in order to solve this contradiction, the method of synthesizing core-shell structure emulsion with high glass transition temperature and low film forming temperature (MFFT) or mixing soft and hard emulsions is mainly adopted, but these two methods cannot substantially substantially Improve the temperature resistance and strength of the emulsion film

Method used

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  • Preparation method of high temperature resistant film-forming styrene-acrylic emulsion for paper product printing
  • Preparation method of high temperature resistant film-forming styrene-acrylic emulsion for paper product printing
  • Preparation method of high temperature resistant film-forming styrene-acrylic emulsion for paper product printing

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preparation example Construction

[0033] A preparation method for high temperature resistant film-forming styrene-acrylic emulsion for paper product printing, comprising the following steps:

[0034] S1. Add 5-40 parts by mass of alkali-soluble resin with an acid value of 150-500, 5-15 parts by mass of ammonia water and 45-85 parts by mass of deionized water into the reaction kettle, stir and heat up to 70-85°C, and wait for alkali After the soluble resin is completely dissolved, it is lowered to room temperature, and the pH value is adjusted to 8.0-9.0 with ammonia water, and the resin liquid is prepared for use;

[0035] The alkali-soluble resin is styrene-maleic anhydride resin or styrene-acrylic resin. Such as SMASZ40005 solid resin from POLYSCOPE in the Netherlands, Tianlong TL-669 solid resin, BASF J-678 solid resin, Hanwha S-120 solid resin, SMA SZ25010 solid resin from POLYSCOPE, etc.

[0036] The acid value of the alkali-soluble resin is 200-500, the softening point is 150-300°C, and the dissolution ...

Embodiment 1

[0056] A kind of preparation method of high temperature resistant film-forming styrene-acrylic emulsion for paper product printing:

[0057]S1. Add 320g of POLYSCOPE SMA SZ40005 solid resin with an acid value of 465 and a Tg of 175°C, 120g of ammonia water and 680g of deionized water into the reaction kettle, stir and heat up to 80°C, and cool down to room temperature after the alkali-soluble resin is completely dissolved , adjust the pH value to 8.0-9.0 with ammonia water, and prepare the resin liquid for subsequent use;

[0058] S2. Add 24g Dowfax 2A1 and 16g OP-10 into 80g water and stir to form emulsifier aqueous solution;

[0059] S3. Mix 208g styrene, 272g methyl methacrylate, 40g diacetone acrylamide and 8g dodecyl mercaptan evenly, then add to the emulsifier aqueous solution and stir to emulsify into a pre-emulsion;

[0060] S4. Take 480g of resin liquid and 10% of the pre-emulsion solution into the reaction kettle, stir and heat up to 80°C, then add 8g of ammonium pe...

Embodiment 2

[0065] A kind of preparation method of high temperature resistant film-forming styrene-acrylic emulsion for paper product printing:

[0066] S1. Add 200g of Tianlong TL-669 solid resin with an acid value of 270 (mgKOH / g) and a softening point of 179°C, 80g of ammonia water and 576g of deionized water into the reaction kettle, stir and heat up to 80°C, and wait for the alkali-soluble resin to Cool down to room temperature after complete dissolution, adjust the pH value to 8.0-9.0 with ammonia water, and prepare the resin solution for later use;

[0067] S2. Add 16g of Dowfax 2A1 and 12g of OP-10 into 40g of water and stir to form emulsifier aqueous solution;

[0068] S3. Mix 104g styrene, 136g methyl methacrylate, 24g N-methylolacrylamide and 4.8g dodecyl mercaptan evenly, then add to the emulsifier aqueous solution and stir to emulsify into a pre-emulsion;

[0069] S4. Take 400g of resin liquid and 10% of pre-emulsion solution into the reaction kettle, stir and heat up to 80°...

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Abstract

The invention relates to a preparation method of a high temperature resistant film-forming styrene-acrylic emulsion for paper product printing. The method includes the steps of: S1. adding alkali-soluble resin with an acid value of 150-500, ammonia water and deionized water into a reaction kettle respectively, conducting stirring heating to 70-85DEG C, and regulating the pH value to 8.0-9.0 with ammonia water so as to obtain a resin solution for standby use; S2. adding an emulsifier into water, and performing stirring to obtain an emulsifier aqueous solution; S3. mixing a polymerizable monomer, a functional monomer and a molecular weight regulator uniformly, adding the mixture into the emulsifier aqueous solution, and performing stirring and emulsifying to obtain a pre-emulsified solution;S4. adding the resin solution and 10% of the pre-emulsified solution into a reaction kettle, conducting stirring heating to 70-85DEG C, and then adding an initiator; S5. starting dropwise adding of the residual pre-emulsified solution, at the end of the adding, raising the temperature to 85-90DEG C, carrying out heat preservation reaction for 0.5-1.5h; S6. carrying out heat preservation reactionfor 0.5-1.5h, then performing cooling to 65DEG C, then starting dropwise adding of an oxidizing agent and a reducing agent simultaneously; and S7. further performing cooling to 40DEG C, adding amino resin, stirring the substances uniformly, and then performing filtering and discharging. The film-forming styrene-acrylic emulsion provided by the invention has a low film-forming temperature, and at the same time has high temperature resistance.

Description

technical field [0001] The invention belongs to the field of polymer material preparation, and in particular relates to a method for preparing a high-temperature resistant film-forming styrene-acrylic emulsion for paper product printing. Background technique [0002] With the formulation of relevant national environmental protection policies and people's increasing attention to environmental issues, water-based coatings have gradually become the focus and have been widely used. In the field of paper printing, water-based inks and water-based varnishes have also been greatly developed, and their film-forming materials are still mainly styrene-acrylate copolymer emulsions. Styrene-acrylic emulsion has the advantages of anti-corrosion, water resistance, good weather resistance and low price, but at the same time, it also has the disadvantage of hot stickiness and cold brittleness, which limits its use. Especially in pre-printed ink and varnish, polymer films are required to ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F257/02C08F212/08C08F220/14C08F220/58C08F220/18C08F220/20C09D11/106C09D11/103C09D125/14C09D135/06C09D161/32
CPCC08F257/02C09D11/106C09D11/103C09D125/14C09D135/06C09D161/32C09D5/18C08L2201/08C08L2205/03C08L2205/025C08F212/08C08F220/14C08L35/06C08L25/14C08L61/32
Inventor 程洁陈高清梅丽明
Owner WUHAN DESYTEK ENVIRONMENTAL PROTECTION NEW MATERIAL CO LTD
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