CN102115617A - Highly-dispersed precipitated barium sulfate and preparation method thereof - Google Patents
Highly-dispersed precipitated barium sulfate and preparation method thereof Download PDFInfo
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- CN102115617A CN102115617A CN2010105963695A CN201010596369A CN102115617A CN 102115617 A CN102115617 A CN 102115617A CN 2010105963695 A CN2010105963695 A CN 2010105963695A CN 201010596369 A CN201010596369 A CN 201010596369A CN 102115617 A CN102115617 A CN 102115617A
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Abstract
The invention belongs to the field of metal barium compounds, in particular relates to highly-dispersed precipitated barium sulfate used on automobile plastic parts and a preparation method thereof. The preparation method comprises the following steps: a, barite with a barium content of more than 95 percent is selected, washed and aired; b, the aired barite is crushed and then milled on a Raymond mill, thereby enabling the fineness of the barite to reach up to more than 400 meshes and acquiring A; c, polyacrylic acid sodium salt dispersant, sericite powders and allyl phenoxyacetate are added to the A, then the A is ground through a sand mill, and the mixture is dried and crushed into B after the particle diameter of the mixture is smaller than or equal to 1.2mu.m; and d, calcium carbonate, titanium dioxide and allyl phenoxyacetate are added to the B and sufficiently mixed with the B, and then a product is acquired. Compared with the prior art, the highly-dispersed precipitated barium sulfate disclosed by the invention has the advantages of small fineness, high dispersibility, low cost, and little pollution to the environment in the production process.
Description
Technical field
The invention belongs to barium metal compound field, be specially a kind of polymolecularity process white that is used for the automobile plastic and preparation method thereof.
Background technology
Process white (English name: pre-cipitated barium sulfate), be widely used in the raw material or the weighting agent of paint, printing ink, plastics, poster paint, makeup, store battery, both made weighting agent in the rubber item, play strengthening action again, make weighting agent and weighting agent in the polychlorostyrene ethane resin, the surface coated agent of photographic pape and art paper, the sizing agent that textile industry is used.Glasswork can play froth breaking and increase the glossy effect as finings.Prior preparation method generally is to be mixed with the saltcake solution that adds after removing calcium, magnesium by barium sulfide solution, reacts in 80 ℃, generates precipitation, after suction filtration, washing and pickling, regulates pH value 5～6, refilters, drying, pulverizing make.Also available baryta yellow halogen and saltcake solution reaction make.And existing process white raw material consumption is bigger in process of production, and may produce the health objectionable impurities, pollute, be unfavorable for environmental protection, product cost is bigger simultaneously.
A kind of preparation method of process white is provided for the Chinese invention patent application of CN200810048340.6 as application number, be to obtain purified solution with adding the filtration of nano level filter cloth among traditional preparation method, recombination separation, acid adjustment, drying, evaporation, product master content barium sulfate brings up to 98.6～99% by 98%, the finished product particle reaches 900 orders-1000 order, NA
2The iron-holder of S product is below 30PPM, but this technology is very complicated, needs in the production process to add the health objectionable impurities, is unfavorable for environmental protection, and production cost is higher.
Summary of the invention
The defective that the present invention is directed to existing process white production technology provides a kind of polymolecularity process white, and it is nontoxic, pollution-free to health, and good dispersity is with low cost, can substitute the application of existing process white product aspect the automobile plastic fully.
The present invention also provides a kind of preparation method of polymolecularity process white, and this method energy consumption is low, and whole process is nontoxic, and the producer's health is not had influence.
Above-mentioned technical problem of the present invention is implemented by the following technical programs:
A kind of preparation method of polymolecularity process white comprises the steps:
A, select the barite of barium content more than 95% carry out selected, clean, dry;
B, the barite after drying are pulverized the back and carry out the thunder mill on roller mills, and its fineness is reached more than 400 orders, obtain A;
C, add sodium polyacrylate dipersant, sericite in powder and allyl phenoxyacetate in A, grind with sand mill then, the particle diameter of mixture is dried after smaller or equal to 1.2 μ m, pulverizes, and obtains B;
D, in B, add lime carbonate, titanium dioxide and allyl phenoxyacetate and obtain product through thorough mixing.
Polypropylene automotive collision bumper proprietary material is main material with PP mainly, and adds a certain proportion of rubber or elastomer material, mineral filler, Masterbatch, auxiliary agent etc. process is mixing and process.In the filler that uses, talcum powder, lime carbonate, process white are the most frequently used, and characteristics (as shown in table 1) are respectively arranged on use properties.Existing as known from Table 1 barium sulfate product over-all properties the best, but the place that comes with some shortcomings.The first, the loading level of barium sulfate is not high; The second, the dispersiveness of barium sulfate in material of main part is still waiting to improve, and not high with the material of main part conjugation, influences the performance of integral material; The 3rd, barium sulfate environmental pollution in process of production is more serious; The 4th, relative cost is too high.
Table 1
Annotate: ++ expression is efficient; Imitate in+the expression; 0 expression is invalid;-expression reversal
The present invention is according to These characteristics, developed that a kind of cost is low, good dispersity, through the process white product that is used for automobile plastic filler of surface activation process, be used as the substitute products of process white.Cardinal principle is to obtain the composite powder material that barium sulfate is the master by adjustment prescription and special grinding technics and surface active mode.Partly substitute barium sulfate with low-cost sericite, effectively reduce production cost, can substitute process white fully, and have characteristics such as nontoxic, good dispersity.Adopt silane coupling agent that the barium sulfate powder is carried out surface modification treatment, effectively improved the bonding strength of barium sulfate and plastic substrate.
As preferably, the mixture weight per distribution ratio described in the step c is: sodium polyacrylate dipersant 1～1.5%, sericite in powder 10～15%, allyl phenoxyacetate 2～3%, surplus are A.That sericite in the prescription can increase is high temperature resistant, weathering resistance and antiseptic property, and allyl phenoxyacetate and polyacrylic acid sodium salt comprehensively play dissemination and avoid reuniting in process of production.
As preferably, the particle diameter of the mixture described in the step c is average out to 1.0～1.2 μ m, and part particle even littler is arranged, and thin more and bonding strength body material of particle can be high more, and is just good more to the whole toughness reinforcing enhancement of matrix.
As preferably, described sodium polyacrylate dipersant is a ROHM AND HAAS 9400.
As preferably, the massfraction of each component is in the steps d: B is 65～75%, and lime carbonate is 15～25%, and titanium dioxide is 5～10%, and allyl phenoxyacetate is 3～5%.Further preferred scheme is that the massfraction of described B is 70%.Processing characteristics and mechanical property that the ratio of B is crossed low products obtained therefrom will reduce, and the too high product cost that will directly cause increases, and 70% is the content of cost performance the best.
A kind of polymolecularity process white, be by following raw material by weight percentage composition mix: B is 65～75%, and lime carbonate is 15～25%, and titanium dioxide is 5～10%, and allyl phenoxyacetate is 3～5%; Described B be by following material by weight percentage composition mix: sodium polyacrylate dipersant 1～1.5%, sericite in powder 10～15%, allyl phenoxyacetate 5～6%, surplus are the barite of barium content more than 95%.Sodium polyacrylate dipersant described in the present invention can be various be the water soluble dispersing agent of main component with the polyacrylic acid sodium salt.The polymolecularity process white that the present invention makes is a kind of of process white, is the superfine powder that forms through chemical purification, super-fine processing.It has position, good space every ability to titanium white and other pigment particles, thereby can save the cost of coating, because of its good size-grade distribution and dispersiveness, often can surpass the result of use of process white in some Application Areas.Be mainly used in automotive plastic parts,, also can be used for high-grade paint, powder coating, printing ink, papermaking, plastics, rubber etc. such as panel board and collision bumper etc.
As preferably, described barite fineness is more than 400 orders.
As preferably, described sodium polyacrylate dipersant is a ROHM AND HAAS 9400.
As preferably, the particle diameter of B is smaller or equal to 1.2 μ m.
The present invention adds lime carbonate, titanium dioxide, sericite filler and has effectively reduced its production cost when improving the quality of products in the barium sulfate barite, adding sodium polyacrylate dipersant can increase substantially the dispersiveness of product, and adding titanium dioxide increases the obstruct of product and absorb the energetic ray ability; Reach the superfine granularity and reduce the environment dust pollution by thunder mill and grinding.In the whole technological process of the inventive method, need not heating, saved fire coal, help energy-saving and emission-reduction; Nontoxic in the production process.Compared with prior art, the polymolecularity process white that makes of the present invention has the following advantages: fineness is little, good dispersity; With low cost; Little to the pollution of environment in process of production.
Description of drawings
Fig. 1 is the transmission electron microscope photo of the polymolecularity process white product that makes of the embodiment of the invention 5.
Embodiment
Below be specific embodiments of the invention; These embodiment can do further to replenish and explanation to the present invention; But the present invention is not limited to these embodiment.
Employed technology in following examples unless stated otherwise, is routine techniques known to those skilled in the art; Employed plant and instrument, reagent etc., only this specification sheets specifies, is that the research of this area and technician can be by public approach acquisition.
In following examples, the sodium polyacrylate dipersant is a ROHM AND HAAS 9400, and sericite in powder is that the permanent vast and boundless Science and Technology Ltd. in Anhui produces.Process white: 1250 orders, Fuyang City white jade chemical industry company limited; Lime carbonate: 1250 orders, Fuyang City white jade chemical industry company limited; Talcum powder: 1250 orders, Fuyang City white jade chemical industry company limited.
Each set of dispense of table 2 B is than (kg)
Each proportioning raw materials of table 3 (kg)
Embodiment 1-4: the preparation method of polymolecularity process white, concrete steps are as follows:
Select the barite of barium content 95% or more carry out selected, clean, dry, pulverize the back and on roller mill, carry out thunder and grind, make its fineness obtain A more than reaching 400 orders.Add sodium polyacrylate dipersant, sericite in powder and allyl phenoxyacetate in A, each proportioning raw materials sees Table 2, grinds with sand mill then, and the particle diameter that makes mixture is dried after smaller or equal to 1.2 μ m, pulverizes, and obtains B; Add lime carbonate, titanium dioxide and allyl phenoxyacetate and obtain product through thorough mixing in B, each proportion of raw materials sees Table 3.
Embodiment 5-9: the preparation method of polymolecularity process white, concrete steps are as follows:
Select the barite of barium content 95% or more carry out selected, clean, dry, pulverize the back and on roller mill, carry out thunder and grind, make its fineness obtain A more than reaching 400 orders.Add sodium polyacrylate dipersant, sericite in powder and allyl phenoxyacetate in A, each proportioning raw materials sees Table 2, grinds with sand mill then, and the particle diameter that makes mixture is back about 100 ℃ oven dry in 1.0～1.2 mu m ranges, pulverizes, and obtains B; Add lime carbonate, titanium dioxide and allyl phenoxyacetate in B, obtain product through thorough mixing, each proportion of raw materials sees Table 3.
As the substitute products of process white, add lime carbonate, titanium dioxide, sericite and relevant auxiliary agent with the barite superfine powder and be composited, relevant composition market value is all cheap than process white, will reduce the relative cost of product greatly.After testing, polymolecularity process white product of the present invention meets the quality standard of GB/T2899-2088 industry process white, and particular exam the results are shown in Table 4.
Table 4
Polymolecularity process white product and existing process white (1250 orders that the present invention is made, Fuyang City white jade chemical industry company limited), lime carbonate, talcum powder are respectively with 20%(weight) loading level cooperate powder to be mixed and made into the plastics collision bumper of automobile with matrix PP, bumper performance to moulding detects, and that compares the results are shown in Table 5.The polymolecularity process white that data declaration the present invention of table 5 makes is compared with existing process white, lime carbonate, talcum powder, the plastics collision bumper processing characteristics and the good mechanical performance that cooperate powder to be mixed and made into matrix PP.
Table 5
The product that embodiment 5 is made carries out the TEM(transmission electron microscope) analyze, the results are shown in Figure 1, the product behavior of not reuniting as can be seen from photo, there is coating layer at the edge, is beneficial to dispersion.
To sum up, the polymolecularity process white product that makes of the inventive method has following purposes:
1. plastics aspect: have good dispersiveness, hardness and rigidity that can reinforced plastics, the surface luster and the brightness that keep plastics are particularly useful for the high light PP and the nylon products of fabricator shop shell.
2. powder coating aspect: can strengthen the levelling property and the gloss retention of powder coating, the dissolubility of holding concurrently preferably be arranged, can improve powder coating and in spraying coating process, reach optimal coating thickness, improve powder utilization, reduce the powder coating consumption with all colorant.
3. coating aspect: this product and titanium dioxide are used by a certain percentage simultaneously, can make titanium dioxide more effectively bring into play it and hide performance, reduce the titanium dioxide consumption, be particularly suitable for automobile finish, the use of high-grade exterior coating, on ageing resistance, increase significantly simultaneously.
Specific embodiment described in the present invention only is that the present invention's spirit is illustrated.The technician of the technical field of the invention can make various modifications or replenishes or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present invention or surmount the defined scope of appended claims.
Although the present invention has been made detailed explanation and has quoted some specific exampless as proof, to those skilled in the art, only otherwise leave that the spirit and scope of the present invention can be done various variations or correction is obvious.
Claims (10)
1. the preparation method of a polymolecularity process white is characterized in that comprising the steps:
A, select the barite of barium content more than 95% carry out selected, clean, dry;
B, the barite after drying are pulverized the back and carry out the thunder mill on roller mills, and its fineness is reached more than 400 orders, obtain A;
C, add sodium polyacrylate dipersant, sericite in powder and allyl phenoxyacetate in A, grind with sand mill then, the particle diameter of mixture is dried after smaller or equal to 1.2 μ m, pulverizes, and obtains B;
D, in B, add lime carbonate, titanium dioxide and allyl phenoxyacetate and obtain product through thorough mixing.
2. preparation method according to claim 1 is characterized in that: the mixture weight per distribution ratio described in the step c is: sodium polyacrylate dipersant 1～1.5%, sericite in powder 10～15%, allyl phenoxyacetate 2～3%, surplus are A.
3. preparation method according to claim 1 is characterized in that: the particle diameter of the mixture described in the step c is 1.0～1.2 μ m.
4. according to claim 1 or 2 or 3 described preparation methods, it is characterized in that: described sodium polyacrylate dipersant is a ROHM AND HAAS 9400.
5. according to claim 1 or 2 or 3 described preparation methods, it is characterized in that: the massfraction of each component is in the steps d: B is 65～75%, and lime carbonate is 15～25%, and titanium dioxide is 5～10%, and allyl phenoxyacetate is 3～5%.
6. preparation method according to claim 4 is characterized in that: the massfraction of each component is in the steps d: B is 65～75%, and lime carbonate is 15～25%, and titanium dioxide is 5～10%, and allyl phenoxyacetate is 3～5%.
7. preparation method according to claim 5 is characterized in that: the massfraction of described B is 70%.
8. polymolecularity process white, it is characterized in that by following raw material by weight percentage composition mix: B is 65～75%, and lime carbonate is 15～25%, and titanium dioxide is 5～10%, and allyl phenoxyacetate is 3～5%; Described B be by following material by weight percentage composition mix: sodium polyacrylate dipersant 1～1.5%, sericite in powder 10～15%, allyl phenoxyacetate 5～6%, surplus are the barite of barium content more than 95%.
9. polymolecularity process white according to claim 8 is characterized in that: described barite fineness is more than 400 orders.
10. polymolecularity process white according to claim 8 is characterized in that: described sodium polyacrylate dipersant is a ROHM AND HAAS 9400.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102838156A (en) * | 2012-09-27 | 2012-12-26 | 江西广源化工有限责任公司 | Preparation method of micron barium sulfate |
| CN105153753A (en) * | 2015-08-07 | 2015-12-16 | 李涛 | Precipitated barium sulfate and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020053303A1 (en) * | 2000-10-11 | 2002-05-09 | Krizan Jeffrey F. | Titanium dioxide pigment composition |
| CN101250336A (en) * | 2008-04-10 | 2008-08-27 | 上海安亿纳米材料有限公司 | Barium sulfate based polybasic composite white pigments and method for preparing same |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020053303A1 (en) * | 2000-10-11 | 2002-05-09 | Krizan Jeffrey F. | Titanium dioxide pigment composition |
| CN101250336A (en) * | 2008-04-10 | 2008-08-27 | 上海安亿纳米材料有限公司 | Barium sulfate based polybasic composite white pigments and method for preparing same |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102838156A (en) * | 2012-09-27 | 2012-12-26 | 江西广源化工有限责任公司 | Preparation method of micron barium sulfate |
| CN105153753A (en) * | 2015-08-07 | 2015-12-16 | 李涛 | Precipitated barium sulfate and preparation method thereof |
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Denomination of invention: Highly-dispersed precipitated barium sulfate and preparation method thereof Effective date of registration: 20150722 Granted publication date: 20130109 Pledgee: Zhejiang Fuyang rural commercial bank Limited by Share Ltd branch of Wan City Pledgor: Fuyang Baiyu Chemical Industry Co., Ltd. Registration number: 2015990000583 |
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Address after: Fuyang City, Hangzhou City, Zhejiang province 311406 City Wan Zhen Nan Xin Peng Patentee after: Fuyang Hangzhou Baiyu Chemical Co., Ltd. Address before: Fuyang City, Hangzhou City, Zhejiang province 311406 City Wan Zhen Nan Xin Peng Patentee before: Fuyang Baiyu Chemical Industry Co., Ltd. |