CN105821706A - Viscosity improver for curtain coating paint and preparation process thereof - Google Patents
Viscosity improver for curtain coating paint and preparation process thereof Download PDFInfo
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- CN105821706A CN105821706A CN201510580412.1A CN201510580412A CN105821706A CN 105821706 A CN105821706 A CN 105821706A CN 201510580412 A CN201510580412 A CN 201510580412A CN 105821706 A CN105821706 A CN 105821706A
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- coating
- curtain
- curtain coating
- viscosity modifier
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Abstract
The invention relates to a viscosity improver for a curtain coating paint and a preparation process thereof. The viscosity improver at least comprises, by mass, 60 to 70 parts of polyvinyl acetate emulsion, 5 to 10 parts of polyethylene glycol, 10 to 15 parts of polymer polyethyleneimine, 1 to 5 parts of a siloxane coupling agent, 5 to 15 parts of an emulsifier and 2 to 15 parts of enclosed isocyanate. According to the invention, through innovation of the process and formula, rheological performance of the emulsion is changed, and when applied to curtain coating, the emulsion endows the paint with excellent fluidity and ductility, so a stable curtain is formed and high-speed coating is realized; and through application of the viscosity improver, the coverage and surface performance of paper are substantially improved, so cost performance of a product is improved.
Description
Technical field
The present invention relates to a kind of curtain coating coating, a kind of curtain coating dope viscosity modifier and preparation technology thereof.
Background technology
Traditional paper coating technique, it mostly is contact, coating passes through scraper or the metering of scraper, coating is applied over the surface of paper, but the bottleneck of the contact and coating rheological property owing to there being physics, thus limit the speed of paper machine and the corresponding performance being coated with paper, the curtain opened up in recent years is coating technique, the coating layer of multilamellar can be made in the same time, as curtain under conditions of physical contact, it is applied in the surface of paper, largely overcomes mechanical contact coating, the speed brought limits, and improves performance simultaneously.But at the same time for the emulsion for this coating method, it is proposed that new requirement.
The formula of existing curtain-type coating, needs common emulsion and the relevant various auxiliary agent of surfactant agent, configures at the scene, and simultaneously relevant rheological property can not fully meet, the demand of curtain-type coating at a high speed.
Summary of the invention
For above-mentioned situation, the present invention provides a kind of curtain coating dope viscosity modifier and preparation technology thereof, by technique and the innovation of formula, improve the rheological property of emulsion so that emulsion is when curtain-type is coated with, it is provided that mobility that coating is excellent and ductility, thus form stable curtain and coating at a high speed, by the application of technique, substantially increase coverage and the surface property of paper, thus improve the cost performance of product.
To achieve these goals, technical scheme is as follows:
A kind of curtain coating dope viscosity modifier, at least include following component, the mass fraction specific gravity range of each component and component is respectively as follows: polyvinyl acetate emulsion 60 ~ 70, Polyethylene Glycol 5 ~ 10, superpolymer polyethylene imines 10 ~ 15, silicone coupling agents 1 ~ 5, emulsifying agent 5 ~ 15, blocked isocyanate 2 ~ 15.
The preparation technology of a kind of curtain coating dope viscosity modifier, comprises the following steps:
Step one: be initially charged polyvinyl acetate emulsion in a kettle., stirs and is sequentially added into superpolymer polyethylene imines, Polyethylene Glycol and silicone coupling agents.
Step 2: reactor temperature is slowly warmed up to 60 degree, at temperature insulation 30 minutes.
Step 3: add emulsifying agent in reactor and stir 10 minutes, finally adding blocked isocyanate, stirring 10 minutes after addition, fully after reaction, room temperature preservation.
The using method of a kind of curtain coating dope viscosity modifier, comprises the following steps:
Step one: prepare curtain coating dope viscosity modifier according to the formula of preparing of viscosity improver, and curtain coating dope viscosity modifier water, calcium carbonate, china clay, starch, carboxymethyl cellulose, water repellent agent and dispersant prepared, and high-speed stirred ensures sufficiently mixing.
Step 2: and add suitable alkali and water, subsequent control compound relevant is contained in about 45% admittedly, and regulates pH 9 ~ 10, and viscosity 400 ~ 700cps makes curtain coating coating.
Step 3: feeding groove squeezed into by curtain coating coating, by curtain mode, impose on the surface of paper, making curtain coating coating cover uniformly at paper surface at a high speed, and do not have holiday, curtain is when falling, capillary optimization due to curtain coating coating, make curtain the most not shake not bifurcated, finally on the surface of paper, form homogeneous coating structure.
The invention have the advantage that the innovation by technique and formula, improve the rheological property of emulsion, make emulsion when curtain-type is coated with, the excellent mobility of coating and ductility are provided, thus form stable curtain and coating at a high speed, by the application of technique, substantially increase coverage and the surface property of paper, thus improve the cost performance of product.Its products characteristics first, by introducing compound high polymer system, it is achieved for effective change of emulsion flow degeneration, thus shows the change of extension viscosity, improves the tensile resistance of emulsion, it is adaptable to coating process at a high speed.Second, by emulsifying agent and the introducing of Polyethylene Glycol compound system, optimize the surface tension performance of emulsion so that emulsion is after coating, and the stability on surface is more preferable, forms stable curtain, not bifurcated, does not shakes, good stability.3rd, by introducing coupling agent and isocyanates compound system, it is provided that the aqueous of emulsion and water-resistance, improve product properties in water-based system.
Detailed description of the invention
Embodiment 1: polyvinyl acetate emulsion 60, Polyethylene Glycol 10, superpolymer polyethylene imines 10, silicone coupling agents 3, emulsifying agent 12, blocked isocyanate 5.
Embodiment 2: polyvinyl acetate emulsion 65, Polyethylene Glycol 5, superpolymer polyethylene imines 10, silicone coupling agents 1, emulsifying agent 15, blocked isocyanate 4.
Embodiment 3: polyvinyl acetate emulsion 67, Polyethylene Glycol 5, superpolymer polyethylene imines 15, silicone coupling agents 3, emulsifying agent 5, blocked isocyanate 5.
Embodiment 4: polyvinyl acetate emulsion 70, Polyethylene Glycol 5, superpolymer polyethylene imines 15, silicone coupling agents 3, emulsifying agent 5, blocked isocyanate 2.
The ultimate principle of the present invention, principal character and advantages of the present invention have more than been shown and described.Skilled person will appreciate that of the industry; the present invention is not restricted to the described embodiments; the principle of the simply present invention described in above-described embodiment and description; the present invention also has various changes and modifications without departing from the spirit and scope of the present invention, and these changes and improvements both fall within the range of claimed invention.The protection domain of application claims is defined by appending claims and equivalent thereof.
Claims (3)
1. a curtain coating dope viscosity modifier, it is characterized in that, at least include following component, the mass fraction specific gravity range of each component and component is respectively as follows: polyvinyl acetate emulsion 60 ~ 70, Polyethylene Glycol 5 ~ 10, superpolymer polyethylene imines 10 ~ 15, silicone coupling agents 1 ~ 5, emulsifying agent 5 ~ 15, blocked isocyanate 2 ~ 15.
2. the preparation technology of a curtain coating dope viscosity modifier, it is characterised in that comprise the following steps:
Step one: be initially charged polyvinyl acetate emulsion in a kettle., stirs and is sequentially added into superpolymer polyethylene imines, Polyethylene Glycol and silicone coupling agents;
Step 2: reactor temperature is slowly warmed up to 60 degree, at temperature insulation 30 minutes;
Step 3: add emulsifying agent in reactor and stir 10 minutes, finally adding blocked isocyanate, stirring 10 minutes after addition, fully after reaction, room temperature preservation.
3. the using method of a curtain coating dope viscosity modifier, it is characterised in that comprise the following steps:
Step one: prepare curtain coating dope viscosity modifier according to the formula of preparing of viscosity improver, and curtain coating dope viscosity modifier water, calcium carbonate, china clay, starch, carboxymethyl cellulose, water repellent agent and dispersant prepared, and high-speed stirred ensures sufficiently mixing;
Step 2: and add suitable alkali and water, subsequent control compound relevant is contained in about 45% admittedly, and regulates pH 9 ~ 10, and viscosity 400 ~ 700cps makes curtain coating coating;
Step 3: feeding groove squeezed into by curtain coating coating, by curtain mode, impose on the surface of paper, making curtain coating coating cover uniformly at paper surface at a high speed, and do not have holiday, curtain is when falling, capillary optimization due to curtain coating coating, make curtain the most not shake not bifurcated, finally on the surface of paper, form homogeneous coating structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510580412.1A CN105821706B (en) | 2015-09-14 | 2015-09-14 | A kind of curtain coating dope viscosity modifier and its preparation technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510580412.1A CN105821706B (en) | 2015-09-14 | 2015-09-14 | A kind of curtain coating dope viscosity modifier and its preparation technology |
Publications (2)
| Publication Number | Publication Date |
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| CN105821706A true CN105821706A (en) | 2016-08-03 |
| CN105821706B CN105821706B (en) | 2017-07-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510580412.1A Active CN105821706B (en) | 2015-09-14 | 2015-09-14 | A kind of curtain coating dope viscosity modifier and its preparation technology |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106638142A (en) * | 2016-12-09 | 2017-05-10 | 苏州艾博迈尔新材料有限公司 | Paper surface reinforcing agent and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0715020A1 (en) * | 1994-12-02 | 1996-06-05 | Lefatex Chemie GmbH | Coating agent for paper surfaces |
| CN1315905A (en) * | 1998-07-09 | 2001-10-03 | 格雷斯公司 | Ink-receptive coatings and recording medium prepared therefrom |
| CN101544847A (en) * | 2008-03-28 | 2009-09-30 | 东洋油墨制造株式会社 | Producing process for microfined organic pigment, microfined organic pigment and microfined organic pigment coloring composition |
| CN102230299A (en) * | 2011-04-22 | 2011-11-02 | 金华盛纸业（苏州工业园区）有限公司 | Chemical painting for curtain coating |
-
2015
- 2015-09-14 CN CN201510580412.1A patent/CN105821706B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0715020A1 (en) * | 1994-12-02 | 1996-06-05 | Lefatex Chemie GmbH | Coating agent for paper surfaces |
| CN1315905A (en) * | 1998-07-09 | 2001-10-03 | 格雷斯公司 | Ink-receptive coatings and recording medium prepared therefrom |
| CN101544847A (en) * | 2008-03-28 | 2009-09-30 | 东洋油墨制造株式会社 | Producing process for microfined organic pigment, microfined organic pigment and microfined organic pigment coloring composition |
| CN102230299A (en) * | 2011-04-22 | 2011-11-02 | 金华盛纸业（苏州工业园区）有限公司 | Chemical painting for curtain coating |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106638142A (en) * | 2016-12-09 | 2017-05-10 | 苏州艾博迈尔新材料有限公司 | Paper surface reinforcing agent and preparation method thereof |
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| Publication number | Publication date |
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| CN105821706B (en) | 2017-07-07 |
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