High-gloss anti-scratch waterborne glazing oil and preparation method thereof

A water-based varnish, high-gloss technology, applied in coatings, paper coatings, textiles and papermaking, etc., can solve the problems of high hardness, easy to be scratched, poor toughness, etc., to achieve high gloss, good adhesion, The effect of improving flexibility

Active Publication Date: 2016-03-09
洋紫荆油墨(中山)有限公司
3 Cites 11 Cited by

AI-Extracted Technical Summary

Problems solved by technology

However, due to the high Tg (glass transition temperature) value of the acrylic emulsion used in the high-gloss water-...
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Method used

As can be seen from Table 1, the present invention adds acrylic acid-modified polyurethane emulsion in water-based varnish formu...
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Abstract

The present invention discloses high-gloss anti-scratch waterborne glazing oil. The waterborne glazing oil comprises the following materials in parts by weight: 30-50 parts of styrene-acrylate emulsion, 10-60 parts of acrylic-modified polyurethane emulsion, 5-15 parts of alkali-soluble acrylic resin, 0.1-0.3 parts of a defoamer, 8-12 parts of wax emulsion, 3-5 parts of a wetting agent, 0.3-1 part of a slip agent, 4-8 parts of 2,2,4-Trimethyl-1,3-pentanediol monoisobutyrate and 5-10 parts of water. The acrylic-modified polyurethane emulsion is prepared from the following components in parts by weight: 200-250 parts of polyethylene glycol, 90-110 parts of isophorone diisocyanate, 10-15 parts of dimethylol propionic acid, 0.1-0.3 parts of dibutyltin dilaurate, 10-15 parts of triethylamine, 4-8 parts of ethylenediamine, 15-30 parts of methyl methacrylate, 45-95 parts of butyl acrylate and 0.4-0.8 parts of azobisisobutyronitrile. The present invention also discloses a preparation method of the waterborne glazing oil. According to the method disclosed by the present invention, the acrylic-modified polyurethane emulsion is introduced into a waterborne glazing oil formula, so that after being formed, a film of the waterborne glazing oil has high gloss, excellent scratch resistance, excellent seam breaking resistance and good printability.

Application Domain

Non-fibrous pulp additionPaper coating +1

Technology Topic

WaxDibutyl tin dilaurate +16

Examples

  • Experimental program(5)
  • Comparison scheme(1)
  • Effect test(1)

Example Embodiment

[0019] Example 1
[0020] The high-gloss and scratch-resistant water-based varnish of this embodiment, in parts by weight, includes 50 parts of styrene-acrylic emulsion, 10 parts of acrylic modified polyurethane emulsion, 10 parts of alkali-soluble acrylic resin, 0.1 part of defoamer, and 10 parts of wax emulsion , 4 parts wetting agent, 0.5 part slip agent, 8 parts dodecyl alcohol ester and 7.5 parts water.
[0021] Among them, the acrylic modified polyurethane emulsion is prepared by the following method: add 200g polyethylene glycol (PEG2000) to a 500mL four-necked flask with a stirrer, a condenser and a thermometer, heat it up to 120°C to make it melt, and put it in a vacuum of 10mmHg. Dehydration under vacuum for 2 hours, then cooled to 80 °C, stopped vacuuming, passed nitrogen, and added 90 g of isophorone diisocyanate dropwise. After constant temperature reaction for 3 hours, 10 g of dimethylolpropionic acid and 0.1 g of dibutyltin dilaurate were added to continue. Reaction; measure the NCO value every 30min, when the NCO value reaches 3.0wt%, cool down to 60°C, add 10g triethylamine for neutralization for 30min, and add deionized water (the amount is based on the required solid content) under high-speed stirring. Adjust) fully stir, then slowly add 20wt% aqueous solution prepared by 4g ethylenediamine, react at constant temperature for 30min, and finally heat the reaction system to 80℃, add 15g methyl methacrylate, 45g butyl acrylate, 0.4g azodicarbonate dropwise The mixed solution of isobutyronitrile was dripped within 1 hour, kept for 3 hours after dripping, cooled to 45°C and discharged to obtain acrylic modified polyurethane emulsion.
[0022] Preparation of water-based varnish: firstly add 50g styrene-acrylic emulsion (Tg=98℃), 10g acrylic modified polyurethane emulsion, then add 10g alkali-soluble acrylic resin, 0.1g defoamer, 10g high gloss wax in sequence under the condition of 600r/min Emulsion, 8g of dodecyl alcohol ester, 4g of wetting agent, 0.5g of slip agent and 7.5g of water, and stirred for 30min to make the raw materials evenly dispersed to obtain water-based varnish.

Example Embodiment

[0023] Example 2
[0024] The high-gloss and scratch-resistant water-based varnish of this embodiment, in parts by weight, includes 30 parts of styrene-acrylic emulsion, 30 parts of acrylic modified polyurethane emulsion, 10 parts of alkali-soluble acrylic resin, 0.1 part of defoamer, and 10 parts of wax emulsion , 4 parts wetting agent, 0.5 part slip agent, 6 parts dodecyl alcohol ester and 7.5 parts water.
[0025] Wherein, the acrylic modified polyurethane emulsion is prepared by the following method: add 250g polyethylene glycol (PEG2000) to a 500mL four-necked flask with a stirrer, a condenser and a thermometer, heat it up to 120°C to make it melt, and put it in a vacuum of 10mmHg. Dehydration under vacuum for 3 hours, then cooling to 80°C, stop vacuuming, pass nitrogen, add 110g isophorone diisocyanate dropwise, after constant temperature reaction for 3 hours, add 15g dimethylolpropionic acid and 1.3g dibutyltin dilaurate to continue Reaction; measure the NCO value every 30min, when the NCO value reaches 4.0wt%, cool down to 60°C, add 15g triethylamine to neutralize for 30min, and add deionized water (the dosage is based on the required solid content) under high-speed stirring. Adjust) fully stir, then slowly add 20wt% aqueous solution prepared by 8g ethylenediamine, react at constant temperature for 30min, and finally heat the reaction system to 80℃, add 30g methyl methacrylate, 95g butyl acrylate, 0.8g azodicarbonate dropwise The mixed solution of isobutyronitrile was dripped within 1 hour, kept for 3 hours after dripping, cooled to 45°C and discharged to obtain acrylic modified polyurethane emulsion.
[0026] Preparation of water-based varnish: firstly add 30g styrene-acrylic emulsion (Tg=98℃), 30g acrylic modified polyurethane emulsion, then add 10g alkali-soluble acrylic resin, 0.1g defoamer, 10g high gloss wax in sequence under the condition of 800r/min Emulsion, 6g dodecyl alcohol ester, 4g wetting agent, 0.5g slip agent and 7.5g water, and stir for 20~40min to make the raw materials evenly dispersed.

Example Embodiment

[0027] Example 3
[0028] The high-gloss and scratch-resistant water-based varnish of this embodiment, in parts by weight, includes 20 parts of styrene-acrylic emulsion, 40 parts of acrylic modified polyurethane emulsion, 10 parts of alkali-soluble acrylic resin, 0.1 part of defoamer, and 10 parts of wax emulsion , 4 parts wetting agent, 0.5 part slip agent, 4 parts dodecyl alcohol ester and 7.5 parts water.
[0029] Wherein, the acrylic modified polyurethane emulsion is prepared by the following method: add 230g polyethylene glycol (PEG2000) to a 500mL four-necked flask with a stirrer, a condenser and a thermometer, heat it up to 120°C to make it melt, and put it in a vacuum of 10mmHg. Dehydration under vacuum for 2.5h, then cooling to 80℃, stop vacuuming, pass nitrogen, add 100g isophorone diisocyanate dropwise, after constant temperature reaction for 3h, add 12g dimethylolpropionic acid and 0.8g dibutyltin dilaurate Continue the reaction; measure the NCO value every 30min, when the NCO value reaches 3.5wt%, cool down to 60°C, add 13g triethylamine for neutralization for 30min, and add deionized water (the dosage is based on the required solid content) under high-speed stirring. to adjust) fully stir, then slowly add 20wt% aqueous solution prepared by 6g ethylenediamine, and react at constant temperature for 30min. Finally, the reaction system is heated to 80℃, and 25g methyl methacrylate, 70g butyl acrylate, 0.6g azo are added dropwise The mixed solution of diisobutyronitrile was dripped within 1 hour, kept for 3 hours after dripping, cooled to 45°C and discharged to obtain acrylic modified polyurethane emulsion.
[0030] Preparation of water-based varnish: first add 40g styrene-acrylic emulsion (Tg=95~100℃), 60g acrylic modified polyurethane emulsion, add 10g alkali-soluble acrylic resin, 0.1g defoamer, 10g in turn under the condition of 800r/min High-gloss wax emulsion, 4g of dodecyl alcohol ester, 4g of wetting agent, 0.5g of slip agent and 7.5g of water, and stirred for 30min to make the raw materials evenly dispersed to obtain water-based varnish.

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