CN1884406A - Preparation method of nanometer functional powder dispersion for coil coating - Google Patents

Preparation method of nanometer functional powder dispersion for coil coating Download PDF

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Publication number
CN1884406A
CN1884406A CN 200610026980 CN200610026980A CN1884406A CN 1884406 A CN1884406 A CN 1884406A CN 200610026980 CN200610026980 CN 200610026980 CN 200610026980 A CN200610026980 A CN 200610026980A CN 1884406 A CN1884406 A CN 1884406A
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China
Prior art keywords
nano
powder
dispersion
add
coil coating
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CN 200610026980
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CN100400610C (en
Inventor
施利毅
周莉
杭建忠
钟庆东
朱惟德
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University of Shanghai for Science and Technology
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University of Shanghai for Science and Technology
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Abstract

The invention relates the preparing method of nanometer powder dispersion. The dispersion comprises nanometer powder, dispersing auxiliary, organic polymer resin and solvent. The method comprises the following steps: using nanometer powder treated with surface processing agent, organic polymer resin and dispersing auxiliary as main material, ball milling, and sanding, emulsifying, dispersing and getting dispersion. The dispersion is added to improve the combination property.

Description

The preparation method who is used for the nanometer functional powder dispersion of coil coating
Technical field
The present invention relates to a kind of preparation method who is used for the nanometer functional powder dispersion of coil coating, belong to the organic resin coating manufacturing process technology field.
Background technology
Because specific surface area that nano-dispersed is mutually big and strong interfacial interaction produce quantum effect and surface effects, nano material is not only shown be different from general macroscopical performance of composites; Also may have property and function that stock blend does not possess, be used to prepare high-performance, the multifunctional material aspect has bright prospects.
The direction that nanotechnology is used in paint field has two: the one, improve the traditional coating performance, and utilize the rheological of coating and the particle diameter of filler to have certain relation, utilize nanotechnology can make the good nano paint of workability; Nanoparticle and exists the good interface bonding force because specific surface area is big between the organic resin matrix, thereby can improve the mechanical properties such as intensity, hardness, wear resistance, scoring resistance of original coating; The 2nd, the functional nano coating that preparation makes new advances is as military invisible coating, electrostatic shielding coating, nano antibacterial coating, nano-interface coating etc.
Chinese patent 1380369 and 1385483 has been described the coating for internal and external wall that is added with Nano filling, and Chinese patent 1375534 discloses a kind of imvite modified building coating.
Because the nature difference of nano-powder and organic polymer material is very big, has a large amount of interfaces, if do not add the quality consequence that processing directly adds the bringing on a disaster property of joining.The dispersiveness of nanoparticle in organic polymer coating is particularly important.The dispersing method of nano-powder has multiple, as mechanical dispersion method, the anti-agglomeration process of static, lyophilize powder dispersion method etc.
Bibliographical information is arranged, adopt ultrasonic vibration and nanometer CaCO 3Carry out two kinds of methods of silane coupling agent processing and improve nanometer CaCO 3Dispersion effect in Resins, epoxy; Detection shows that these two kinds of methods than the common dispersive better effects if that mixes, can realize nanometer CaCO 3Homodisperse in Resins, epoxy.Michael D.Kass publishes thesis at Maferials Letters and has reported in the aluminum oxide ball milling process and utilize action of ultrasonic waves and influence, has shown ball milling and ultrasonic wave coupling, can make the particle diameter of aluminum oxide littler, can improve dispersion effect.But these methods are complex process mostly, and preparation time is long, the nano-powder dispersion stabilization is the most not desirable.
Summary of the invention
The objective of the invention is to improve the deficiencies in the prior art part, a kind of nanometer functional powder dispersion for preparing in advance that is used for coil coating is provided, make coil coating have good dispersiveness and coating excellent properties.Another purpose of the present invention provides the preparation method of the nanometer functional powder dispersion that is used for coil coating.
The present invention is a kind of preparation method who is used for the nanometer functional powder dispersion of coil coating, it is characterized in that having following technological process and step:
A. in a certain amount of organic resin, add the nano-function powder of handling through organic surface treatment agent; Nano-function powder comprises any in nano barium sulfate, silicon oxide, titanium oxide, zinc oxide, nickel oxide, the aluminum oxide; Organic surface treatment agent is a sodium laurate, and the add-on of sodium laurate is 2.0~7.0% of a nano-powder weight; The amount that adds treated nano-function powder in organic resin is 28~32% of an organic resin weight; Add the dispersing auxiliary modified polyurethane again, the add-on of dispersion agent modified polyurethane is 10~30% of a nano-function powder weight
B. reinforced one by one, stir churning time 15~30 minutes one by one; Above-mentioned mixing solutions makes its homodisperse again through ball milling, sand milling, the emulsify at a high speed of routine and shake multinomial dispersing technology; Finally make dispersion liquid.
Described organic resin is any in vibrin, Resins, epoxy, the aminoresin.
The median size of described nano-function powder is 30~50nm.
The dispersion liquid that the present invention makes only needs join in the lacquer process at coil coating and adds by 5~10% weight percents in use, can use behind the uniform mixing.The coating that final coil coating forms has good glossiness, the curved snappiness of T and erosion resistance after testing.In addition, the dispersiveness of nano-powder in coil coating also is significantly improved and improves.
Embodiment
After now embodiments of the invention being described in.
Embodiment 1
The processing step of present embodiment is as follows:
Be averaged the natural barite that particle diameter is 100nm, coat processing with organic surface treatment agent sodium laurate, its consumption is 4% of a natural barite nano-powder weight; Get 100 gram vibrin earlier, add 4.5 gram dispersing auxiliary polyurethane EFKA-4060, high-speed stirring 15 minutes; Add treated barite nano-powder by amount then, its add-on is 28% of organic vibrin weight, stirs 30 minutes again; Above-mentioned mixed solution makes its homodisperse again through ball milling, sand milling, the emulsify at a high speed of routine and shake multinomial dispersing technology, finally makes dispersion liquid.
This dispersion liquid joined in the lacquer process in the 5wt% ratio at coil coating add, behind the uniform mixing the nanometer coil coating; This coating evenly is applied to cold-rolled steel coils, behind hyperthermia drying, gets color steel A, give over to benchmark test.
Embodiment 2
The processing step of present embodiment is as follows:
Be averaged the natural barite that particle diameter is 40nm, coat processing with organic surface treatment agent sodium laurate, its consumption is 4% of a natural barite nano-powder weight; Get 100 gram vibrin earlier, add 4.5 gram dispersing auxiliary polyurethane EFKA-4060, high-speed stirring 15 minutes; Add treated barite nano-powder by amount then, its add-on is 28% of organic vibrin weight, stirs 30 minutes again; Above-mentioned mixed solution makes its homodisperse again through ball milling, sand milling, the emulsify at a high speed of routine and shake multinomial dispersing technology, finally makes dispersion liquid.
This dispersion liquid joined in the lacquer process in the 5wt% ratio at coil coating add, behind the uniform mixing the nanometer coil coating; This coating evenly is applied to cold-rolled steel coils, behind hyperthermia drying, gets color steel B, give over to benchmark test.
Embodiment 3
The processing step of present embodiment is as follows:
Be averaged the nano-titanium oxide that particle diameter is 40nm, coat processing with organic surface treatment agent sodium laurate, its consumption is 4% of a nano-titanium oxide weight; Get 100 gram vibrin earlier, add 5.0 gram dispersing auxiliary polyurethane EFKA-4060, high-speed stirring 15 minutes; Add treated nano-titanium oxide powder by amount then, its add-on is 30% of organic vibrin weight, stirs 30 minutes again; Above-mentioned mixed solution makes its homodisperse again through ball milling, sand milling, the emulsify at a high speed of routine and shake multinomial dispersing technology, finally makes dispersion liquid.
This dispersion liquid joined in the lacquer process in the 5wt% ratio at coil coating add, behind the uniform mixing the nanometer coil coating; This coating evenly is applied to cold-rolled steel coils, behind hyperthermia drying, gets color steel C, give over to benchmark test.
Embodiment 4
The processing step of present embodiment is as follows:
Be averaged the nano silicon oxide that particle diameter is 40nm, coat processing with organic surface treatment agent sodium laurate, its consumption is 4% of a nano silicon oxide weight; Get 100 gram vibrin earlier, add 5.0 gram dispersing auxiliary polyurethane EFKA-4060, high-speed stirring 15 minutes; Add treated nano silica powder by amount then, its add-on is 30% of organic vibrin weight, stirs 30 minutes again; Above-mentioned mixed solution makes its homodisperse again through ball milling, sand milling, the emulsify at a high speed of routine and shake multinomial dispersing technology, finally makes dispersion liquid.
By above-mentioned same quadrat method, get color steel D, give over to benchmark test.
Embodiment 5
The processing step of present embodiment is as follows:
Be averaged the natural barite that particle diameter is 40nm, with organic surface treatment agent sodium laurate coated processing, its consumption is 4% of a barite nano-powder weight; Get 100 gram Resins, epoxy earlier, add 5.0 gram dispersing auxiliary polyurethane EFKA-4060, high-speed stirring 15 minutes; Add treated barite nano-powder by amount then, its add-on is 30% of a weight epoxy, stirs 30 minutes again; Above-mentioned mixed solution makes its homodisperse again through ball milling, sand milling, the emulsify at a high speed of routine and shake multinomial dispersing technology, finally makes dispersion liquid.
By above-mentioned same quadrat method, get color steel E, give over to benchmark test.
Embodiment 6
The processing step of present embodiment is as follows:
Be averaged the natural barite that particle diameter is 40nm, coat processing with organic surface treatment agent sodium laurate, its consumption is 4% of a barite powder weight; Get 100 gram aminoresin earlier, add 5.0 gram dispersing auxiliary polyurethane EFKA-4060, high-speed stirring 15 minutes; Add treated barite nano-powder by amount then, its add-on is 30% of an aminoresin weight, stirs 30 minutes again; Above-mentioned mixed solution makes its homodisperse again through ball milling, sand milling, the emulsify at a high speed of routine and shake multinomial dispersing technology, finally makes dispersion liquid.
By above-mentioned same quadrat method, get color steel F, give over to benchmark test.
In addition, in order opposing frequently, not to be coated with material samples " conventional color steel ", to make benchmark test simultaneously yet what be added with nano-function powder.
The performance index of each color steel sample paint coatings are as shown in table 1 below:
Each color steel sample coating performance index of table 1
Numbering Glossiness Hardness Scratch resistant T is curved Salt-fog resistant time (hour)
A 45.2 2H 0 3T 552
B 47.3 H 0 3T 800
C 46.5 2H 0 3T 720
D 43.5 2H 0 3T 700
E 40.1 2H 0 3T 680
F 42.3 2H 0 3T 650
Conventional 35.7 2H 0 4T 500
As can be known from the above table, compare with conventional coating, after adding nano-powder, paint film T bends value, gloss value and hardness value and all increases, especially salt-fog resistant time has obvious prolongation, illustrate that the coating paint film flexibility after nano powder modified improves, glossiness strengthens, and has better hardness and excellent corrosion resistance nature with time delay.
Detect through scanning electronic microscope, can find out, contain granules of pigments and some apertures of differing in size in the primer coating without the nano-function powder modification from photo; In primer coating, then find the primer coating of many uniform granules of pigments and streamline shape through the modification of nanometer natural barite.This explanation is passed through primer coating of nanometer natural barite modification than unmodified primer coating densification, its compactness height.This is because when nano-powder reaches good dispersion state in organic resin, utilize its volume effect can fill " structure aperture ", forms the almost dense coating of atresia, and the infiltration of stopping each corrosive medium in the environment.

Claims (3)

1. preparation method who is used for the nanometer functional powder dispersion of coil coating is characterized in that having following technological process and step:
A. in a certain amount of organic resin, add the nano-function powder of handling through organic surface treatment agent; Nano-function powder comprises any in nano barium sulfate, silicon oxide, titanium oxide, zinc oxide, nickel oxide, the aluminum oxide; Organic surface treatment agent is a sodium laurate, and the add-on of sodium laurate is 2.0~7.0% of a nano-powder weight; The amount that adds treated nano-function powder in organic resin is 28~32% of an organic resin weight; Add the dispersing auxiliary modified polyurethane again, the add-on of dispersion agent modified polyurethane is 10~30% of a nano-function powder weight
B. reinforced one by one, stir churning time 15~30 minutes one by one; Above-mentioned mixing solutions makes its homodisperse again through ball milling, sand milling, the emulsify at a high speed of routine and shake multinomial dispersing technology; Finally make dispersion liquid.
2. a kind of preparation method who is used for the nanometer functional powder dispersion of coil coating as claimed in claim 1 is characterized in that described organic resin is any in vibrin, Resins, epoxy, the aminoresin.
3. a kind of preparation method who is used for the nanometer functional powder dispersion of coil coating as claimed in claim 1, the median size that it is characterized in that described nano-function powder is 30~50nm.
CNB2006100269808A 2006-05-26 2006-05-26 Preparation method of nanometer functional powder dispersion for coil coating Expired - Fee Related CN100400610C (en)

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CN100400610C CN100400610C (en) 2008-07-09

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101824239A (en) * 2010-04-15 2010-09-08 河南许绝电工绝缘材料有限公司 Surface processing method of powder material
CN101733030B (en) * 2008-11-13 2011-12-14 上海沪正纳米科技有限公司 Preparation method of nano sulfur slurry
CN102757609A (en) * 2011-04-27 2012-10-31 比亚迪股份有限公司 Composition capable of improving sand mark shielding performance of colored paint and preparation method thereof and colored paint containing composition
CN113604137A (en) * 2021-04-03 2021-11-05 中海油常州涂料化工研究院有限公司 Scratch-resistant epoxy modified polyester back paint for coiled material with high coating rate and preparation method thereof
CN116639723A (en) * 2023-06-16 2023-08-25 南风化工(运城)集团有限公司 Preparation method of modified submicron barium sulfate

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005036105A (en) * 2003-07-15 2005-02-10 Nippon Kayaku Co Ltd Photosensitive resin composition and film with cured coating thereof
CN1571078B (en) * 2004-05-13 2011-05-04 上海大学 Method for preparing high throughflow nanometre composite lightning arrester valve plate
CN1281695C (en) * 2004-12-06 2006-10-25 复旦大学 Nanometer composite polyester resin paint with high solid content and low viscosity and its prepn

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101733030B (en) * 2008-11-13 2011-12-14 上海沪正纳米科技有限公司 Preparation method of nano sulfur slurry
CN101824239A (en) * 2010-04-15 2010-09-08 河南许绝电工绝缘材料有限公司 Surface processing method of powder material
CN102757609A (en) * 2011-04-27 2012-10-31 比亚迪股份有限公司 Composition capable of improving sand mark shielding performance of colored paint and preparation method thereof and colored paint containing composition
CN113604137A (en) * 2021-04-03 2021-11-05 中海油常州涂料化工研究院有限公司 Scratch-resistant epoxy modified polyester back paint for coiled material with high coating rate and preparation method thereof
CN116639723A (en) * 2023-06-16 2023-08-25 南风化工(运城)集团有限公司 Preparation method of modified submicron barium sulfate

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Assignee: GUANGDONG YINFAN CHEMISTRY Co.,Ltd.

Assignor: Shanghai University

Contract fulfillment period: 2008.8.18 to 2018.8.18

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Denomination of invention: Preparation method of nanometer functional powder dispersion for coil coating

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Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2008.8.18 TO 2018.8.18; CHANGE OF CONTRACT

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