CN102875735A - Styrene-acrylic emulsion for surface coating paint of coated paper and preparation method thereof - Google Patents
Styrene-acrylic emulsion for surface coating paint of coated paper and preparation method thereof Download PDFInfo
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- CN102875735A CN102875735A CN201210378155XA CN201210378155A CN102875735A CN 102875735 A CN102875735 A CN 102875735A CN 201210378155X A CN201210378155X A CN 201210378155XA CN 201210378155 A CN201210378155 A CN 201210378155A CN 102875735 A CN102875735 A CN 102875735A
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Abstract
The invention discloses styrene-acrylic emulsion for surface coating paint of coated paper and a preparation method thereof. The styrene-acrylic emulsion is prepared by emulsion polymerization of following materials, by weight, 100 parts of mixed monomer, 4-15 parts of seed emulsion, 0.7-4.5 parts of emulsifier, 0.4-4.5 parts of initiator, 0.5-1.5 parts of accelerant, 2-6 parts of functional monomer, 4-20 parts of aqueous alkali and 90-290 parts of water. The functional monomer comprises, by weight, 25-69 parts of (methyl) acrylate, 30-70 parts of (methyl) styrene, 1-5 parts of (methyl) acyclic acid and 1-4 parts of vinyl hydroxy silicone oil. The styrene-acrylic emulsion for surface coating paint of coated paper is high in performance, environment-friendly and applicable to papermaking coating. By applying the styrene-acrylic emulsion in surface coating paint of coated paper, water resistance of coated paper is evidently enhanced, and coating gloss of the paper is increased.
Description
Technical field
The present invention relates to a kind of styrene-acrylate emulsion for surface coatings, be applied to the painting coating of White Board.
Background technology
Emulsion is widely used in the bonding of paper coating, and is in application process, more and more higher to the performance requriements of emulsion.Along with improvement and the development of emulsion applications Technology, require emulsion to have good technique suitability.Emulsion applications can obviously strengthen the water resisting property of paper in paper coating, improve the coating glossiness of paper.
At present, existing emulsion, for behind the paper, gloss difference, the water resisting property of paper can not meet the demands, such as the technology of CN101280035A patent report.
Summary of the invention
A kind of styrene-acrylate emulsion for surface coatings of coated paper that the objective of the invention is to propose is to overcome the defective of prior art.
Styrene-acrylate emulsion for surface coatings of coated paper of the present invention is the raw material with following parts by weight proportioning, prepares by emulsion polymerization way:
Described mix monomer is by the monomer composition of following parts by weight:
Said seed emulsion is the raw material with following parts by weight proportioning, prepares by emulsion polymerization way:
Described mix monomer II is by the monomer composition of following parts by weight:
85～95 parts of (methyl) vinylbenzene
5～15 parts of (methyl) acrylate
Said polyvinyl alcohol is selected from least a in polyvinyl alcohol 0588,1788 or 2488;
Said polyoxyethylene nonylphenol ether is selected from least a in Nonyl pheno (7) ether, Nonyl pheno (9) ether, Nonyl pheno (10) ether or Nonyl pheno (15) ether;
Said polypropylene glycol is selected from polypropylene glycol PPG-200, at least a among PPG-400 or the PPG-600;
Said (methyl) acrylate is selected from methyl acrylate, ethyl propenoate, n-butyl acrylate, isobutyl acrylate, ethyl acrylate, methyl methacrylate, β-dimethyl-aminoethylmethacrylate, n-BMA, methacrylic acid-2-ethylhexyl, acrylic or methacrylic acid C
8～C
16At least a in the alkyl ester, preferred n-butyl acrylate, methyl methacrylate or ethyl acrylate;
Described emulsifying agent is that anion surfactant and nonionogenic tenside are composited, and weight ratio is: anion surfactant: nonionogenic tenside=1: 0.4～0.25: 2.0;
Said nonionogenic tenside is selected from Witconol AL 69-66, anhydrous sorbitol tristearate (this dish 65), glycol fatty acid ester, propylene glycol fatty acid ester, anhydrous sorbitol list hard fatty acid ester (this dish 60), sorbitan monooleate (span 80), the Diethylene Glycol fatty acid ester, anhydrous sorbitol monopalmitate (this dish 40), the polyoxytrimethylene hard fatty acid ester, sorbitan mono-laurate (this dish 20), the polyoxyethylene hard fatty acid ester, the lauric acid polyoxyethylene ester, polyoxyethylene (4) anhydrous sorbitol list hard fatty acid ester (Tween61), polyoxyethylene (5) sorbitan monooleate (sorbimacrogol oleate100), polyoxyethylene (20) anhydrous sorbitol tristearate (polysorbate65), polyoxyethylene (20) Witconol AL 69-66 (polysorbate85), the polyoxyethylene monoleate, fatty alcohol amine polyoxyethylene ether, alkylphenol polyoxyethylene, the polyoxyethylene mono-laurate, polyoxyethylene castor oil, polyoxyethylene (4) sorbitan mono-laurate (tween 21), polyoxyethylene (20) anhydrous sorbitol list hard fatty acid ester (polysorbate60), polyoxyethylene (20) sorbitan monooleate (tween 80), polyoxyethylene (20) anhydrous sorbitol monopalmitate (polysorbate40), at least a in polyoxyethylene (20) sorbitan mono-laurate (polysorbas20), preferred sorbitan monooleate (span 80), polyoxyethylene (20) sorbitan monooleate (tween 80) or sorbitan mono-laurate (this dish 20);
Said anion surfactant is selected from C
10～C
20Sodium alkyl benzene sulfonate, C
10～C
20Sodium alkyl naphthalene sulfonate, C
10～C
20At least a in sodium alkyl sulfate, dialkyl group-2-sodium sulfosuccinate, dicyclohexyl-2-sodium sulfosuccinate, Succinic Acid sodium sulfonate, sodium oleate, potassium oleate or the Emulphor FM, preferred Sodium dodecylbenzene sulfonate, dodecyl sodium naphthalene sulfonate or dialkyl group-2-sodium sulfosuccinate;
Described initiator is selected from least a in Potassium Persulphate, Sodium Persulfate or the ammonium persulphate;
Described promotor is selected from least a in Methacrylamide ethyl ethylene-urea or the diacetone-acryloamide(DAA);
Described function monomer is selected from least a in 2-acrylamide-2-methyl propane sulfonic or the vinyl hydroxy silicone oil;
Described alkali aqueous solution is selected from least a in aqueous sodium hydroxide solution, potassium hydroxide aqueous solution, the ammonium hydroxide aqueous solution, and weight concentration is 10～25%;
The preparation method of above-mentioned styrene-acrylate emulsion for surface coatings of coated paper comprises the steps:
1) seed emulsion is synthetic:
A) (methyl) acrylate, (methyl) vinylbenzene are mixed, obtain the mix monomer II;
B) polyvinyl alcohol, polyoxyethylene nonylphenol ether, polypropylene glycol, initiator and water are mixed, under 70～90 ℃ of conditions, be incubated 10～30 minutes, add the mix monomer II of step in a);
C) be incubated 1～3 hour under 70～90 ℃ of conditions, be cooled to 10～35 ℃, filter, collect filtrate, obtain seed emulsion;
Gained seed emulsion weight solid content is 20～40%, median size 20～40nm (using the Malven particle instrument to record), pH=2～6 (using PHS-3C Accurate pH instrumentation to get);
2) styrene-acrylate emulsion for surface coatings of coated paper:
A) (methyl) acrylate, (methyl) vinylbenzene (methyl) vinylformic acid and vinyl hydroxy silicone oil are mixed, obtain mix monomer.
B) emulsifying agent of gross weight 2.5～45.5%, initiator and gross weight 3.4～11.2% water of gross weight 2.4～62.5% are mixed, obtain aqueous solution I;
C) water with promotor and gross weight 3.4～11.2% mixes, and obtains aqueous solution II;
D) 0 ~ 2 part of 2-acrylamide-2-methyl propane sulfonic and 10 parts of water are mixed, the alkali aqueous solution neutralization with 25% obtains aqueous solution III;
E) mix monomer is mixed with the emulsifying agent of gross weight 16.5～91.0%, the initiator of gross weight 7.4～91.0% and the water of gross weight 17.2～55.6%, obtain aqueous solution IV;
F) seed emulsion is mixed with the emulsifying agent of gross weight 3.8～77.0%, the initiator of gross weight 3.8～87% and the water of gross weight 6.8～81.5%, 60 ℃～95 ℃ were reacted 10～40 minutes, then drip d) mixed solution III in the step and, e) the mixed solution IV in the step drips 1～3 hour;
Then, under 50～80 ℃, drip simultaneously the step b of gross weight 30～35%) in mixed solution I and step c) in the mixed solution II, drip 10～30 minutes, then drip simultaneously the step b of surplus) in mixed solution, drip 10～30 minutes;
G) 50～80 ℃ are incubated 1～2 hour, are cooled to 10～35 ℃, and with 25% alkali aqueous solution neutralization, filter pH=6～9, collects filtrate, obtains styrene-acrylate emulsion for surface coatings.Gained emulsion median size 50～150nm (using the Malven particle instrument to record).
Said styrene-acrylate emulsion for surface coatings of coated paper can be applicable to the painting coating of White Board.
The present invention finds to pass through on benzene emulsion emulsion particle surface successively graft-promoting additive, the resulting emulsion of function monomer, is applied to the painting coating of White Board, not only can improve the coating gloss of paper, and can increase substantially the water resisting property of paper.This may be owing to adding organosilane monomer vinyl hydroxy silicone oil at benzene emulsion, can greatly improve the water tolerance of emulsion and is applied in the coating paper surface, improves the water resisting property of paper.And another function monomer 2-acrylamide-2-methyl propane sulfonic is so that the emulsion particle surface has great amount of hydroxy group and sulfonic group to form strong hydrogen bond action with fiber surface, strengthen the surface strength of paper, active group in the promotor can react with substrate surface simultaneously, improve the combination degree of each component of coating, the coating glossiness of paper is improved.
Styrene-acrylate emulsion for surface coatings of coated paper of the present invention is a kind of product that can satisfy papermaking paint high-performance, environmental protection.This product is used in the painting coating of White Board, can obviously strengthen the water resisting property of White Board, improves the coating glossiness of paper.
Embodiment
Embodiment 1
1) seed emulsion is synthetic:
A) 15g n-butyl acrylate, 85g vinylbenzene are mixed, obtain the mix monomer II.
B) 10g polyvinyl alcohol 0588(Guangzhou river in Henan Province is contained chemical industry company limited), 10g Nonyl pheno (7) ether (the prosperous Chemical Industry Science Co., Ltd of Guangzhou monarch), 0.1g polypropylene glycol PPG-200(Jiangsu Hai'an Petrochemical Plant), 0.5g Potassium Persulphate and 180.9g deionized water mix, insulation is 10 minutes under 90 ℃ of conditions, adds the mix monomer II of step in a).
C) be incubated 1 hour under 90 ℃ of conditions, be cooled to 25 ℃, 100 eye mesh screens filter, get seed emulsion, weight solid content: 39.68wt%, median size 39.3nm (using the Malven particle instrument to record), pH=5.93 (using PHS-3C Accurate pH instrumentation to get).
2) styrene-acrylate emulsion for surface coatings of coated paper is synthetic:
A) 25g n-butyl acrylate, 70g vinylbenzene, 5g vinylformic acid and 1g vinyl hydroxy silicone oil are mixed and made into mix monomer.For subsequent use.
B) with the 0.05g Sodium dodecylbenzene sulfonate, 0.05g polyoxyethylene (20) sorbitan monooleate (tween 80), 0.1g Potassium Persulphate are dissolved in the 10g deionized water, and be for subsequent use;
C) 0.5g Methacrylamide ethyl ethylene-urea is dissolved in the 10g deionized water, for subsequent use;
D) 2g2-acrylamide-2-methyl propane sulfonic and 10g water being mixed, is 25% aqueous sodium hydroxide solution neutralization with 8 gram weight concentration, PH=7;
E) mix monomer in a) step is added 0.4g Sodium dodecylbenzene sulfonate, 0.1g polyoxyethylene (20) sorbitan monooleate (tween 80), 0.2g Potassium Persulphate and become the aqueous solution with the 50g deionized water dissolving, stirred 30 minutes, for subsequent use;
F) with 4g step 1) in seed emulsion add the 0.05g Sodium dodecylbenzene sulfonate, 0.05g in the aqueous solution of polyoxyethylene (20) sorbitan monooleate (tween 80), 0.1g Potassium Persulphate and 24.3g deionized water, reaction is 40 minutes under 60 ℃ of conditions, then drip simultaneously d) mixed solution and e in the step) mixed solution in the step, drip 3 hours.50 ℃ of b that drip simultaneously gross weight 33%) mixed solution and the c in the step) whole mixed solution in the step drips 30 minutes, then drips simultaneously the b of surplus) mixed solution and 2g 2-hydroxyethyl methacrylate in the step, drip 30 minutes;
G) 50 ℃ are incubated 2 hours.Being cooled to 25 ℃, is 25% aqueous sodium hydroxide solution neutralization with 12 gram weight concentration, continues to stir 10 minutes.Filter through 100 eye mesh screens, get styrene-acrylate emulsion for surface coatings, weight solid content: 49.82wt%, median size 135nm (using the Malven particle instrument to record), pH=7.91 (using PHS-3C Accurate pH instrumentation to get).
Embodiment 2
1) seed emulsion is synthetic:
A) 15g n-butyl acrylate, 85g vinylbenzene are mixed, obtain the mix monomer II.
B) 10g polyvinyl alcohol 0588(Guangzhou river in Henan Province is contained chemical industry company limited), 10g Nonyl pheno (7) ether (the prosperous Chemical Industry Science Co., Ltd of Guangzhou monarch), 0.1g polypropylene glycol PPG-200(Jiangsu Hai'an Petrochemical Plant), 0.5g Potassium Persulphate and 180.9g deionized water mix, insulation is 10 minutes under 90 ℃ of conditions, adds the mix monomer II of step in a).
C) be incubated 1 hour under 90 ℃ of conditions, be cooled to 25 ℃, 100 eye mesh screens filter, get seed emulsion, weight solid content: 39.68wt%, median size 39.3nm (using the Malven particle instrument to record), pH=5.93 (using PHS-3C Accurate pH instrumentation to get).
2) styrene-acrylate emulsion for surface coatings of coated paper is synthetic:
A) 69g ethyl propenoate, 30g vinyl toluene 1g methacrylic acid and 2g vinyl hydroxy silicone oil are mixed and made into mix monomer.For subsequent use.
B) with 0.1g dialkyl group-2-sodium sulfosuccinate, 0.4g sorbitan mono-laurate (this dish 20), 0.5g Sodium Persulfate are dissolved in the 10g deionized water.For subsequent use.
C) the 1.5g diacetone-acryloamide(DAA) is dissolved in the 10g deionized water.For subsequent use.
D) 1g2-acrylamide-2-methyl propane sulfonic and 10g water being mixed, is 25% aqueous sodium hydroxide solution neutralization with 4 gram weight concentration, PH=8;
E) mix monomer in a) step is added 1g dodecyl sodium naphthalene sulfonate, 1g sorbitan mono-laurate (this dish 20), 2g Sodium Persulfate and become the aqueous solution with the 50g deionized water dissolving, stirred 30 minutes.For subsequent use.
F) with the seed emulsion in the 8g step 1), 0.5g dodecyl sodium naphthalene sulfonate, 1.5g in the aqueous solution of polyoxyethylene monoleate, 2g Sodium Persulfate and 190.0g deionized water, reaction is 10 minutes under 95 ℃ of conditions, then drips simultaneously d) mixed solution and e in the step) mixed solution 3 hours in the step.80 ℃ of b that drip simultaneously gross weight 35%) mixed solution and the c in the step) whole mixed solution in the step drips 10 minutes, then drips simultaneously surplus b) mixed solution and 1g vinylformic acid-2-hydroxyl ethyl ester in the step, drip 10 minutes.
G) 80 ℃ are incubated 1 hour.Being cooled to 25 ℃, is 25% ammonium hydroxide aqueous solution neutralization with 16 gram weight concentration, continues to stir 10 minutes.Filter through 100 eye mesh screens, get styrene-acrylate emulsion for surface coatings, solid content: 50.03wt%, median size 125.1nm (using the Malven particle instrument to record), pH=8.13 (using PHS-3C Accurate pH instrumentation to get).
Embodiment 3
1) seed emulsion is synthetic:
A) 15g n-butyl acrylate, 85g vinylbenzene are mixed, obtain the mix monomer II.
B) 10g polyvinyl alcohol 0588(Guangzhou river in Henan Province is contained chemical industry company limited), 10g Nonyl pheno (7) ether (the prosperous Chemical Industry Science Co., Ltd of Guangzhou monarch), 0.1g polypropylene glycol PPG-200(Jiangsu Hai'an Petrochemical Plant), 0.5g Potassium Persulphate and 180.9g deionized water mix, insulation is 10 minutes under 90 ℃ of conditions, adds the mix monomer II of step in a).
C) be incubated 1 hour under 90 ℃ of conditions, be cooled to 25 ℃, 100 eye mesh screens filter, get seed emulsion, weight solid content: 39.68wt%, median size 39.3nm (using the Malven particle instrument to record), pH=5.93 (using PHS-3C Accurate pH instrumentation to get).
2) styrene-acrylate emulsion for surface coatings of coated paper is synthetic:
A) 20g methyl methacrylate, 27g ethyl acrylate, 50g vinyl toluene 3g methacrylic acid and 3g vinyl hydroxy silicone oil are mixed and made into mix monomer, for subsequent use.
B) with 0.1g Succinic Acid sodium sulfonate, 0.2g polyoxytrimethylene hard fatty acid ester, 0.3g ammonium persulphate are dissolved in the 10g deionized water.For subsequent use.
C) 0.5g diacetone-acryloamide(DAA), 0.5g Methacrylamide ethyl ethylene-urea are dissolved in the 10g deionized water.For subsequent use.
D) 1g2-acrylamide-2-methyl propane sulfonic and 10g water are mixed, with the aqueous sodium hydroxide solution neutralization of 4 gram weight concentration 25%, PH=8;
E) mix monomer in a) step is added 0.2g potassium oleate, 0.8g Diethylene Glycol fatty acid ester, 1g ammonium persulphate and become the aqueous solution with the 50g deionized water dissolving, stirred 30 minutes.For subsequent use.
F) seed emulsion in the 15g step 1) is added the 0.8g sodium lauryl sulphate, 0.2g in the aqueous solution of sorbitan monooleate (span 80), 1g ammonium persulphate and 78.65g deionized water, reaction is 20 minutes under 75 ℃ of conditions, then drip simultaneously d) mixed solution and e in the step) mixed solution in the step, drip 3 hours.75 ℃ drip gross weight 30%b simultaneously) mixed solution and c in the step) whole mixed solution in the step, drip 20 minutes, then drip simultaneously the b of surplus) mixed solution and 1.5g methacrylic acid-2-hydroxypropyl acrylate in the step, drip 20 minutes;
G) 75 ℃ are incubated 1 hour.Be cooled to 25 ℃, be neutralized to pH=7.18 with the aqueous sodium hydroxide solution of 16 gram weight concentration 25%, continue to stir 10 minutes.Filter through 100 eye mesh screens, get styrene-acrylate emulsion for surface coatings, solid content: 50.15wt%, median size 130.3nm (using the Malven particle instrument to record), pH=7.78 (using PHS-3C Accurate pH instrumentation to get).
Embodiment 4
1) seed emulsion is synthetic:
A) 15g n-butyl acrylate, 85g vinylbenzene are mixed, obtain the mix monomer II.
B) 10g polyvinyl alcohol 0588(Guangzhou river in Henan Province is contained chemical industry company limited), 10g Nonyl pheno (7) ether (the prosperous Chemical Industry Science Co., Ltd of Guangzhou monarch), 0.1g polypropylene glycol PPG-200(Jiangsu Hai'an Petrochemical Plant), 0.5g Potassium Persulphate and 180.9g deionized water mix, insulation is 10 minutes under 90 ℃ of conditions, adds the mix monomer II of step in a).
C) be incubated 1 hour under 90 ℃ of conditions, be cooled to 25 ℃, 100 eye mesh screens filter, get seed emulsion, weight solid content: 39.68wt%, median size 39.3nm (using the Malven particle instrument to record), pH=5.93 (using PHS-3C Accurate pH instrumentation to get).
2) styrene-acrylate emulsion for surface coatings of coated paper is synthetic:
A) 58g n-BMA, 40g vinylbenzene 2g vinylformic acid and 4g vinyl hydroxy silicone oil are mixed and made into mix monomer.For subsequent use.
B) with 0.1g dicyclohexyl-2-sodium sulfosuccinate, 0.1g polyoxyethylene (4) anhydrous sorbitol list hard fatty acid ester (Tween61), 0.2g Sodium Persulfate are dissolved in the 10g deionized water.For subsequent use.
C) 0.3g diacetone-acryloamide(DAA), 0.4g Methacrylamide ethyl ethylene-urea are dissolved in the 10g deionized water.For subsequent use.
D) 0.5g 2-acrylamide-2-methyl propane sulfonic and 10g water being mixed, is 25% aqueous sodium hydroxide solution neutralization with 2 gram weight concentration, PH=8;
E) mix monomer in a) step is added 0.6g dicyclohexyl-2-sodium sulfosuccinate, 0.8g polyoxyethylene (4) anhydrous sorbitol list hard fatty acid ester (Tween61), 1.3g Sodium Persulfate and become the aqueous solution with the 50g deionized water dissolving, stirred 30 minutes.For subsequent use.
F) seed emulsion in the 11g step 1) is added the 0.5g Sodium palmityl sulfate, 0.7g in the aqueous solution of polyoxyethylene (4) anhydrous sorbitol list hard fatty acid ester (Tween61), 1.5g Sodium Persulfate and 47.0g deionized water, reaction is 15 minutes under 65 ℃ of conditions, then drip simultaneously d) mixed solution e in the step) mixed solution in the step, drip 3 hours.65 ℃ of b that drip simultaneously gross weight 33%) mixed solution and the c in the step) whole mixed solution in the step drips 15 minutes, then drips simultaneously the b of surplus) mixed solution in the step and 1.8g 2-hydroxyethyl methacrylate 15 minutes.
G) 65 ℃ are incubated 1 hour.Being cooled to 25 ℃, is 25% aqueous sodium hydroxide solution neutralization with 18 gram weight concentration, continues to stir 10 minutes.Filter through 100 eye mesh screens, get styrene-acrylate emulsion for surface coatings, solid content: 49.89wt%, median size 131.2nm (using the Malven particle instrument to record), pH=7.89 (using PHS-3C Accurate pH instrumentation to get).
Embodiment 5
1) seed emulsion is synthetic:
A) 15g n-butyl acrylate, 85g vinylbenzene are mixed, obtain the mix monomer II.
B) 10g polyvinyl alcohol 0588(Guangzhou river in Henan Province is contained chemical industry company limited), 10g Nonyl pheno (7) ether (the prosperous Chemical Industry Science Co., Ltd of Guangzhou monarch), 0.1g polypropylene glycol PPG-200(Jiangsu Hai'an Petrochemical Plant), 0.5g Potassium Persulphate and 180.9g deionized water mix, insulation is 10 minutes under 90 ℃ of conditions, adds the mix monomer II of step in a).
C) be incubated 1 hour under 90 ℃ of conditions, be cooled to 25 ℃, 100 eye mesh screens filter, get seed emulsion, weight solid content: 39.68wt%, median size 39.3nm (using the Malven particle instrument to record), pH=5.93 (using PHS-3C Accurate pH instrumentation to get).
2) styrene-acrylate emulsion for surface coatings of coated paper is synthetic:
A) 36g isobutyl acrylate, 60g vinyl toluene 4g methacrylic acid and 2g vinyl hydroxy silicone oil are mixed and made into mix monomer.For subsequent use.
B) with the 0.2g Emulphor FM, 0.2g Witconol AL 69-66,0.4g Sodium Persulfate are dissolved in the 10g deionized water.For subsequent use.
C) 0.5g diacetone-acryloamide(DAA), 0.7g Methacrylamide ethyl ethylene-urea are dissolved in the 10g deionized water.For subsequent use.
D) mix monomer in a) step is added 0.3g Emulphor FM, 0.3g Witconol AL 69-66,0.5g Sodium Persulfate and become the aqueous solution with the 50g deionized water dissolving, stirred 30 minutes.For subsequent use.
E) 1.5g 2-acrylamide-2-methyl propane sulfonic and 10g water being mixed, is 18% aqueous sodium hydroxide solution neutralization with 6 gram weight concentration, PH=7;
F) seed emulsion in the 12g step 1) is added 0.3g hexadecyl benzene sulfonic acid sodium salt, 0.6g in the aqueous solution of Witconol AL 69-66,0.6g Sodium Persulfate and 119.27g deionized water, reaction is 15 minutes under 70 ℃ of conditions, then drip simultaneously d) mixed solution and e in the step) mixed solution in the step, drip 3 hours.70 ℃ drip 33% b simultaneously) mixed solution and c in the step) whole mixed solution in the step, drip 25 minutes, then drip simultaneously the b of surplus) mixed solution in the step and 1.4g 2-hydroxyethyl methacrylate 25 minutes;
G) 70 ℃ are incubated 1 hour.Being cooled to 25 ℃, is 25% aqueous sodium hydroxide solution neutralization with 14 gram weight concentration, continues to stir 10 minutes.Filter through 100 eye mesh screens, get styrene-acrylate emulsion for surface coatings, solid content: 49.95wt%, median size 127.6nm (using the Malven particle instrument to record), pH=8.18 (using PHS-3C Accurate pH instrumentation to get).
Embodiment 6
Comparative Examples: the emulsion of pressing the method preparation of CN101280035A
By following formulated coating
95 grades of water-ground limestone 400g
Brazil china clay 100g
Emulsion (dry weight) 50g
Experimentation: 1) 95 grades of water-ground limestones, Brazilian china clay and appropriate amount of deionized water are added high speed dispersor, the rear high speed dispersion 20～30min that stirs, qualified to fineness, add emulsion under the low speed, after stirring, discharging, 100 eye mesh screens filter.2) will adopt the coating of embodiment 1～5 and Comparative Examples emulsion preparation to use the 10# spreading rod at 75g/m
2Be coated with glue spread 20g/m on the art base paper
2, for subsequent use.3) coating rolling condition: get respectively above-mentioned coating pattern with twice of the hard press polish of small-sized rolling press (0.3Mpa, 85 ℃).For subsequent use.
Deionized water is an amount of, and adjusting the coating weight solid content is 65%, and its physical index is as follows:
Think according to the coating physical index, under the similarity condition, compare with contrast sample latex, embodiment latex dope viscosity that series samples is joined is all lower.
The coating pattern detects data
Can be got by data in the table, under the similarity condition, compare with the contrast sample, embodiment series latex coating pattern, print gloss and coating gloss are higher, and other index is more approaching.
Can find out from above-mentioned application result: use the styrene-acrylate emulsion for surface coatings of coated paper of the embodiment of the invention 1～5 preparation, compare with Comparative Examples, be applied to the painting coating of White Board, can significantly improve the coating glossiness of White Board.
Claims (9)
1. styrene-acrylate emulsion for surface coatings of coated paper is characterized in that, is the raw material with following parts by weight proportioning, prepares by emulsion polymerization way:
Described mix monomer is by the monomer composition of following parts by weight:
2. styrene-acrylate emulsion for surface coatings of coated paper according to claim 1 is characterized in that, described seed emulsion is the raw material with following parts by weight proportioning, prepares by emulsion polymerization way:
Described mix monomer II is by the monomer composition of following parts by weight:
85～95 parts of (methyl) vinylbenzene
5～15 parts of (methyl) acrylate.
3. 2 described styrene-acrylate emulsion for surface coatings of coated paper as requested, it is characterized in that, said polyvinyl alcohol is selected from polyvinyl alcohol 0588, at least a in 1788 or 2488, described polyoxyethylene nonylphenol ether is selected from least a in Nonyl pheno (7) ether, Nonyl pheno (9) ether, Nonyl pheno (10) ether or Nonyl pheno (15) ether, said polypropylene glycol is selected from polypropylene glycol PPG-200, at least a among PPG-400 or the PPG-600; Said (methyl) acrylate is selected from methyl acrylate, ethyl propenoate, n-butyl acrylate, isobutyl acrylate, ethyl acrylate, methyl methacrylate, β-dimethyl-aminoethylmethacrylate, n-BMA, methacrylic acid-2-ethylhexyl, acrylic or methacrylic acid C
8～C
16At least a in the alkyl ester.
4. 3 described styrene-acrylate emulsion for surface coatings of coated paper as requested is characterized in that, described (methyl) acrylate is selected from n-butyl acrylate, methyl methacrylate or ethyl acrylate.
5. 1 described styrene-acrylate emulsion for surface coatings of coated paper as requested, it is characterized in that, described emulsifying agent is that anion surfactant and nonionogenic tenside are composited, and weight ratio is: anion surfactant: nonionogenic tenside=1: 0.4～0.25: 2.0.
6. 5 described styrene-acrylate emulsion for surface coatings of coated paper as requested, it is characterized in that, said nonionogenic tenside is selected from Witconol AL 69-66, anhydrous sorbitol tristearate (this dish 65), glycol fatty acid ester, propylene glycol fatty acid ester, anhydrous sorbitol list hard fatty acid ester (this dish 60), sorbitan monooleate (span 80), the Diethylene Glycol fatty acid ester, anhydrous sorbitol monopalmitate (this dish 40), the polyoxytrimethylene hard fatty acid ester, sorbitan mono-laurate (this dish 20), the polyoxyethylene hard fatty acid ester, the lauric acid polyoxyethylene ester, polyoxyethylene (4) anhydrous sorbitol list hard fatty acid ester (Tween61), polyoxyethylene (5) sorbitan monooleate (sorbimacrogol oleate100), polyoxyethylene (20) anhydrous sorbitol tristearate (polysorbate65), polyoxyethylene (20) Witconol AL 69-66 (polysorbate85), the polyoxyethylene monoleate, fatty alcohol amine polyoxyethylene ether, alkylphenol polyoxyethylene, the polyoxyethylene mono-laurate, polyoxyethylene castor oil, polyoxyethylene (4) sorbitan mono-laurate (tween 21), polyoxyethylene (20) anhydrous sorbitol list hard fatty acid ester (polysorbate60), polyoxyethylene (20) sorbitan monooleate (tween 80), polyoxyethylene (20) anhydrous sorbitol monopalmitate (polysorbate40), at least a in polyoxyethylene (20) sorbitan mono-laurate (polysorbas20), preferred sorbitan monooleate (span 80), polyoxyethylene (20) sorbitan monooleate (tween 80) or sorbitan mono-laurate (this dish 20);
Said anion surfactant is selected from C
10～C
20Sodium alkyl benzene sulfonate, C
10～C
20Sodium alkyl naphthalene sulfonate, C
10～C
20At least a in sodium alkyl sulfate, dialkyl group-2-sodium sulfosuccinate, dicyclohexyl-2-sodium sulfosuccinate, Succinic Acid sodium sulfonate, sodium oleate, potassium oleate or the Emulphor FM, preferred Sodium dodecylbenzene sulfonate, dodecyl sodium naphthalene sulfonate or dialkyl group-2-sodium sulfosuccinate.
7. 1 described styrene-acrylate emulsion for surface coatings of coated paper as requested is characterized in that, described initiator is selected from least a in Potassium Persulphate, Sodium Persulfate or the ammonium persulphate;
Described promotor is selected from least a in Methacrylamide ethyl ethylene-urea or the diacetone-acryloamide(DAA);
Described alkali aqueous solution is selected from least a in aqueous sodium hydroxide solution, potassium hydroxide aqueous solution, the ammonium hydroxide aqueous solution, and weight concentration is 10～25%.
8. 1～7 each described styrene-acrylate emulsion for surface coatings of coated paper as requested is characterized in that, described function monomer is selected from least a in 2-acrylamide-2-methyl propane sulfonic or the vinyl hydroxy silicone oil.
9. prepare the method for each described styrene-acrylate emulsion for surface coatings of coated paper of claim 1～8, it is characterized in that, comprise the steps:
1) seed emulsion is synthetic:
A) (methyl) acrylate, (methyl) vinylbenzene are mixed, obtain the mix monomer II;
B) polyvinyl alcohol, polyoxyethylene nonylphenol ether, polypropylene glycol, initiator and water are mixed, under 70～90 ℃ of conditions, be incubated 10～30 minutes, add the mix monomer II of step in a);
C) be incubated 1～3 hour under 70～90 ℃ of conditions, be cooled to 10～35 ℃, filter, collect filtrate, obtain seed emulsion;
2) styrene-acrylate emulsion for surface coatings of coated paper:
A) (methyl) acrylate, (methyl) vinylbenzene (methyl) vinylformic acid and vinyl hydroxy silicone oil are mixed, obtain mix monomer;
B) emulsifying agent of gross weight 2.5～45.5%, initiator and gross weight 3.4～11.2% water of gross weight 2.4～62.5% are mixed, obtain aqueous solution I;
C) water with promotor and gross weight 3.4～11.2% mixes, and obtains aqueous solution II;
D) 0 ~ 2 part of 2-acrylamide-2-methyl propane sulfonic and 10 parts of water are mixed, the alkali aqueous solution neutralization with 25% obtains aqueous solution III;
E) mix monomer is mixed with the emulsifying agent of gross weight 16.5～91.0%, the initiator of gross weight 7.4～91.0% and the water of gross weight 17.2～55.6%, obtain aqueous solution IV;
F) seed emulsion is mixed with the emulsifying agent of gross weight 3.8～77.0%, the initiator of gross weight 3.8～87% and the water of gross weight 6.8～81.5%, 60 ℃～95 ℃ were reacted 10～40 minutes, then drip d) mixed solution III in the step and, e) the mixed solution IV in the step drips 1～3 hour;
Then, under 50～80 ℃, drip simultaneously the step b of gross weight 30～35%) in mixed solution I and step c) in the mixed solution II, drip 10～30 minutes, then drip simultaneously the step b of surplus) in mixed solution, drip 10～30 minutes;
G) 50～80 ℃ are incubated 1～2 hour, are cooled to 10～35 ℃, and with 25% alkali aqueous solution neutralization, filter pH=6～9, collects filtrate, obtains described styrene-acrylate emulsion for surface coatings of coated paper.
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