CN104672367A - Preparation method of styrene-acrylic emulsion surface sizing agent - Google Patents
Preparation method of styrene-acrylic emulsion surface sizing agent Download PDFInfo
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- CN104672367A CN104672367A CN201510053433.8A CN201510053433A CN104672367A CN 104672367 A CN104672367 A CN 104672367A CN 201510053433 A CN201510053433 A CN 201510053433A CN 104672367 A CN104672367 A CN 104672367A
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Abstract
The invention discloses a preparation method of a styrene-acrylic emulsion surface sizing agent. The method is characterized by comprising the following steps: (1) selecting raw materials; (2) preparing a pre-emulsion; (3) preparing a seed emulsion; (4) polymerizing an outer layer; and (5) preparing a sizing liquid. A traditional emulsifier is replaced with a reactive emulsifier acrylamido isopropyl sodium sulfonate in raw material selection; the reactive emulsifier can be bonded to a polymer in a manner of a covalent bond when playing an emulsifying role, so as to become one part of the polymer; emulsifier migration in a film-forming process or desorption of the emulsifier from polymer particles is avoided; hydrophilic groups on the surface of a latex film are greatly reduced; the polymer has relatively good water-resisting property; and the water-resisting property and stability of the styrene-acrylic emulsion surface sizing agent are improved.
Description
Technical field
The present invention relates to a kind of Surface Size technical field, particularly relate to a kind of preparation method of styrene-acrylic emulsion surface sizing agent.
Background technology
Top sizing is significant to paper industry, and top sizing can improve the quality and performance of paper well, and to meet the requirement of the field developments such as current papermaking, printing, and Surface Size product directly has influence on the quality of top sizing effect.Styrene-acrylic emulsion surface sizing agent is developed rapidly in paper industry with the performance of its excellence, it can give the performance of the numerous excellence of paper, but the domestic starting of the research work about styrene-acrylic emulsion surface sizing agent is late, it is good not also to there is water resisting property in styrene-acrylic emulsion surface sizing agent, the problems such as stability is imperfect, therefore research and develop the good styrene-acrylic emulsion surface sizing agent of water resisting property very important.
Benzene emulsion domestic at present generally adopts traditional emulsifying agent to carry out the synthesis of emulsion, conventional emulsifier synthesis stability of emulsion poor, the emulsifying agent remained when film forming can occur move or richness based on the interface between film and air, reduce the water resisting property of latex film.
Summary of the invention
The present invention is intended to solve the deficiencies in the prior art, and provides the preparation method of the styrene-acrylic emulsion surface sizing agent that a kind of water resisting property is good.
The present invention for achieving the above object, by the following technical solutions: a kind of preparation method of styrene-acrylic emulsion surface sizing agent, is characterized in that, comprises the following steps:
(1) starting material are selected:
Emulsifying agent: acrylamido sodium isopropyl xanthate; Monomer: vinylbenzene, butyl acrylate, methyl methacrylate, vinylformic acid, N hydroxymethyl acrylamide, adds the formaldehyde accounting for monomer total mass 5%, mixes during use; Buffer reagent: sodium bicarbonate; Neutralizing agent: ammoniacal liquor; Initiator: Potassium Persulphate;
(2) preparation of pre-emulsion:
Emulsifying agent is dissolved in deionized water, then monomer is added wherein, and with magnetic stirring apparatus carry out stirring make its emulsification formed pre-emulsion;
(3) preparation of seed emulsion:
Bath temperature is adjusted to 75 DEG C ~ 80 DEG C, add deionized water, buffer reagent, emulsifying agent successively, after fully dissolving, temperature is risen to 85 DEG C ~ 90 DEG C, then the initiator of total consumption 30% ~ 40% and the pre-emulsion of total consumption 40% ~ 50% is added, insulation 30min ~ 40min, makes it be polymerized generation seed emulsion;
(4) outer layers of polymer:
Start to add N hydroxymethyl acrylamide in remaining pre-emulsion after insulation 30min ~ 40min, and be uniformly mixed, then drip in seed emulsion and remainingly added the pre-emulsion of N hydroxymethyl acrylamide and the initiator of total consumption 10% ~ 20%, the rate of addition of initiator is slightly faster than the rate of addition of pre-emulsion, after being added dropwise to complete, insulation 25min ~ 30min, start to drip remaining initiator, insulation 1h ~ 1.5h, be cooled to 40 DEG C, filter discharging, adjust pH to obtain benzene emulsion with neutralizing agent ammoniacal liquor;
(5) glue application solution preparation:
By Sumstar 190 gelatinization 30min ~ 35min at 90 DEG C ~ 95 DEG C, be made into the dextrin of 8%, then add the benzene emulsion of 0.4% synthesis, stir and obtain glue application solution.
The invention has the beneficial effects as follows: the present invention adopts reactive emulsifier acrylamido sodium isopropyl xanthate to replace traditional emulsifying agent, reactive emulsifier can be bonded in polymkeric substance by the mode of covalent linkage while playing emulsifying effect, become a part for polymkeric substance, emulsifying agent migration when avoiding film forming or emulsifying agent are from desorb polymer particle, greatly reduce the hydrophilic radical on latex film surface, make polymkeric substance have better water resisting property, improve water resisting property and the stability of styrene-acrylic emulsion surface sizing agent.
Embodiment
Below in conjunction with embodiment, the invention will be further described:
Embodiment 1
A preparation method for styrene-acrylic emulsion surface sizing agent, is characterized in that, comprises the following steps:
(1) starting material are selected:
Emulsifying agent: acrylamido sodium isopropyl xanthate; Monomer: vinylbenzene, butyl acrylate, methyl methacrylate, vinylformic acid, N hydroxymethyl acrylamide, adds the formaldehyde accounting for monomer total mass 5%, mixes during use; Buffer reagent: sodium bicarbonate; Neutralizing agent: ammoniacal liquor; Initiator: Potassium Persulphate;
(2) preparation of pre-emulsion:
Emulsifying agent is dissolved in deionized water, then monomer is added wherein, and with magnetic stirring apparatus carry out stirring make its emulsification formed pre-emulsion;
(3) preparation of seed emulsion:
Bath temperature is adjusted to 75 DEG C, adds deionized water, buffer reagent, emulsifying agent successively, after fully dissolving, temperature is risen to 85 DEG C, then add the initiator of total consumption 30% and the pre-emulsion of total consumption 40%, insulation 30min ~ 40min, makes it be polymerized generation seed emulsion;
(4) outer layers of polymer:
Start to add N hydroxymethyl acrylamide in remaining pre-emulsion after insulation 30min ~ 40min, and be uniformly mixed, then drip in seed emulsion and remainingly added the pre-emulsion of N hydroxymethyl acrylamide and the initiator of total consumption 20%, the rate of addition of initiator is slightly faster than the rate of addition of pre-emulsion, after being added dropwise to complete, insulation 25min ~ 30min, start to drip remaining initiator, insulation 1h ~ 1.5h, be cooled to 40 DEG C, filter discharging, adjust pH to obtain benzene emulsion with neutralizing agent ammoniacal liquor;
(5) glue application solution preparation:
By Sumstar 190 gelatinization 30min ~ 35min at 90 DEG C ~ 95 DEG C, be made into the dextrin of 8%, then add the benzene emulsion of 0.4% synthesis, stir and obtain glue application solution.
Embodiment 2
A preparation method for styrene-acrylic emulsion surface sizing agent, is characterized in that, comprises the following steps:
(1) starting material are selected:
Emulsifying agent: acrylamido sodium isopropyl xanthate; Monomer: vinylbenzene, butyl acrylate, methyl methacrylate, vinylformic acid, N hydroxymethyl acrylamide, adds the formaldehyde accounting for monomer total mass 5%, mixes during use; Buffer reagent: sodium bicarbonate; Neutralizing agent: ammoniacal liquor; Initiator: Potassium Persulphate;
(2) preparation of pre-emulsion:
Emulsifying agent is dissolved in deionized water, then monomer is added wherein, and with magnetic stirring apparatus carry out stirring make its emulsification formed pre-emulsion;
(3) preparation of seed emulsion:
Bath temperature is adjusted to 80 DEG C, adds deionized water, buffer reagent, emulsifying agent successively, after fully dissolving, temperature is risen to 90 DEG C, then add the initiator of total consumption 40% and the pre-emulsion of total consumption 50%, insulation 30min ~ 40min, makes it be polymerized generation seed emulsion;
(4) outer layers of polymer:
Start to add N hydroxymethyl acrylamide in remaining pre-emulsion after insulation 30min ~ 40min, and be uniformly mixed, then drip in seed emulsion and remainingly added the pre-emulsion of N hydroxymethyl acrylamide and the initiator of total consumption 10%, the rate of addition of initiator is slightly faster than the rate of addition of pre-emulsion, after being added dropwise to complete, insulation 25min ~ 30min, start to drip remaining initiator, insulation 1h ~ 1.5h, be cooled to 40 DEG C, filter discharging, adjust pH to obtain benzene emulsion with neutralizing agent ammoniacal liquor;
(5) glue application solution preparation:
By Sumstar 190 gelatinization 30min ~ 35min at 90 DEG C ~ 95 DEG C, be made into the dextrin of 8%, then add the benzene emulsion of 0.4% synthesis, stir and obtain glue application solution.
Claims (1)
1. a preparation method for styrene-acrylic emulsion surface sizing agent, is characterized in that, comprises the following steps:
(1) starting material are selected:
Emulsifying agent: acrylamido sodium isopropyl xanthate; Monomer: vinylbenzene, butyl acrylate, methyl methacrylate, vinylformic acid, N hydroxymethyl acrylamide, adds the formaldehyde accounting for monomer total mass 5%, mixes during use; Buffer reagent: sodium bicarbonate; Neutralizing agent: ammoniacal liquor; Initiator: Potassium Persulphate;
(2) preparation of pre-emulsion:
Emulsifying agent is dissolved in deionized water, then monomer is added wherein, and with magnetic stirring apparatus carry out stirring make its emulsification formed pre-emulsion;
(3) preparation of seed emulsion:
Bath temperature is adjusted to 75 DEG C ~ 80 DEG C, add deionized water, buffer reagent, emulsifying agent successively, after fully dissolving, temperature is risen to 85 DEG C ~ 90 DEG C, then the initiator of total consumption 30% ~ 40% and the pre-emulsion of total consumption 40% ~ 50% is added, insulation 30min ~ 40min, makes it be polymerized generation seed emulsion;
(4) outer layers of polymer:
Start to add N hydroxymethyl acrylamide in remaining pre-emulsion after insulation 30min ~ 40min, and be uniformly mixed, then drip in seed emulsion and remainingly added the pre-emulsion of N hydroxymethyl acrylamide and the initiator of total consumption 10% ~ 20%, the rate of addition of initiator is slightly faster than the rate of addition of pre-emulsion, after being added dropwise to complete, insulation 25min ~ 30min, start to drip remaining initiator, insulation 1h ~ 1.5h, be cooled to 40 DEG C, filter discharging, adjust pH to obtain benzene emulsion with neutralizing agent ammoniacal liquor;
(5) glue application solution preparation:
By Sumstar 190 gelatinization 30min ~ 35min at 90 DEG C ~ 95 DEG C, be made into the dextrin of 8%, then add the benzene emulsion of 0.4% synthesis, stir and obtain glue application solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510053433.8A CN104672367A (en) | 2015-02-02 | 2015-02-02 | Preparation method of styrene-acrylic emulsion surface sizing agent |
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| CN201510053433.8A CN104672367A (en) | 2015-02-02 | 2015-02-02 | Preparation method of styrene-acrylic emulsion surface sizing agent |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105331307A (en) * | 2015-10-16 | 2016-02-17 | 上海晶华胶粘新材料股份有限公司 | Core-shell styrene-acrylic emulsion impregnating agent, and preparation method thereof |
| CN106758517A (en) * | 2017-01-19 | 2017-05-31 | 中山联合鸿兴造纸有限公司 | A kind of page surface glue-applying technique method |
| CN107236497A (en) * | 2017-06-23 | 2017-10-10 | 无锡海特新材料研究院有限公司 | A kind of Modified Oxidizing Starch Adhesive, its preparation method and application |
-
2015
- 2015-02-02 CN CN201510053433.8A patent/CN104672367A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105331307A (en) * | 2015-10-16 | 2016-02-17 | 上海晶华胶粘新材料股份有限公司 | Core-shell styrene-acrylic emulsion impregnating agent, and preparation method thereof |
| CN106758517A (en) * | 2017-01-19 | 2017-05-31 | 中山联合鸿兴造纸有限公司 | A kind of page surface glue-applying technique method |
| CN107236497A (en) * | 2017-06-23 | 2017-10-10 | 无锡海特新材料研究院有限公司 | A kind of Modified Oxidizing Starch Adhesive, its preparation method and application |
| CN107236497B (en) * | 2017-06-23 | 2019-05-07 | 无锡海特新材料研究院有限公司 | A kind of Modified Oxidizing Starch Adhesive, preparation method and application |
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