CN104004226A - Modified aluminum hydroxide and preparation method thereof - Google Patents
Modified aluminum hydroxide and preparation method thereof Download PDFInfo
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- CN104004226A CN104004226A CN201410188317.2A CN201410188317A CN104004226A CN 104004226 A CN104004226 A CN 104004226A CN 201410188317 A CN201410188317 A CN 201410188317A CN 104004226 A CN104004226 A CN 104004226A
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Abstract
The invention discloses a surface-modified aluminum hydroxide and a preparation method thereof. The surface-modified aluminum hydroxide comprises, by mass, 30 parts of aluminum hydroxide and 0.3-1.2 parts of a modifier. The modifier is Span, a complex of Span and stearic acid, or a complex of Span and sodium stearate. The Span is Span 40, Span 60 or Span 85. The preparation method comprises the following steps of preparing an aluminum hydroxide aqueous suspension having a mass concentration of 10%, heating the aluminum hydroxide aqueous suspension to a temperature of 80-85 DEG C, preparing a modifier-ethanol solution having a modifier mass concentration of 1%, adding the modifier-ethanol solution into the aluminum hydroxide aqueous suspension, heating the mixed suspension to a temperature of 70-90 DEG C, keeping the temperature for 0.5-1.5h, and carrying out standing, suction filtration, washing, drying and grinding so that the surface-modified aluminum hydroxide which is conducive to uniform dispersion in a polymer base and improves base compatibility is obtained.
Description
Technical field
The present invention relates to chemical field, particularly a kind of modified aluminium hydroxide and preparation method thereof.
Background technology
Aluminium hydroxide is a kind of conventional Chemical Manufacture raw material, one of its most important purposes is exactly the flame-retardant additive that can be used as various macromolecular materials, to improve the flame retardant properties of material, but require aluminium hydroxide can be uniformly dispersed in these polymer base materials, thereby unlikely processing characteristics and the basic mechanical performance that affects base material itself.
Because surface of aluminum hydroxide has the feature of " hydrophilic oleophobic ", cause the interfacial property of itself and macromolecular material to differ too large, bonding force is very poor, add aluminium hydroxide agglomeration easily occurs in molding process, thereby make aluminium hydroxide be difficult to be uniformly dispersed in polymer base material, and then have influence on processing and the use properties of macromolecular material.Therefore, in order to improve dispersiveness and the consistency of aluminium hydroxide in base material, need to be to aluminium hydroxide powder modifying surface, make its particle surface become " hydrophobic oleophylic " from " hydrophilic oleophobic ", to improve the dispersiveness of aluminum hydroxide particles itself, thereby improve cohesive force and affinity between itself and body material micro interface, stop the sharply decline of material mechanical performance.
At present, mainly contain following two kinds about the method for Modified by Aluminum Hydroxide:
(1) aluminium hydroxide of synthesis nano.
This method can be improved dispersiveness and the consistency of aluminium hydroxide at base material well, even can improve the basic mechanical performance of some material.It is high that but the synthetic nano level aluminium hydroxide in laboratory has cost, and the features such as complex process, are therefore difficult to realize industrialization;
(2) for the consideration of cost and processing condition, that many investigators set about utilizing is with low cost, modified effect good, the tensio-active agent of environment-friendly type carries out organic modification to aluminum hydroxide particles surface, thereby improves the consistency of aluminium hydroxide and base material and the dispersiveness in base material.The process for treating surface of aluminium hydroxide mainly comprises two classes: tensio-active agent wet processing and coupling agent dry process.
1. tensio-active agent wet processing selects negatively charged ion, cationic surfactant and minority nonionic surface active agent as properties-correcting agent conventionally.The principle of this method modification is: one end great majority of surfactant molecule are chain alkyl, and the other end is some polar groups such as carboxyl, amino.In whipping process, " amphipathic " of surfactant molecule makes its polar group form the adsorption layer (unimolecular layer or bilayer) of directed arrangement on the surface of particle by chemisorption, physical adsorption way, thereby changed the surface properties of aluminum hydroxide particles.
Utilize at present the report on tensio-active agent wet processing inorganic powder particle surface more, for example: " a kind of preparation method of silicone oil surface modified aluminium hydroxide flame retardant " (CN20101053724.8) adopted in patent first silicone oil with physical adsorption in surface of aluminum hydroxide, then sprays the method that catalyzer reacts the functional group of silicone oil and the surface hydroxyl of aluminium hydroxide.The anion surfactant that many documents mainly all concentrate on use " oil-in-water " type at the wet-process modified aluminium hydroxide of report, to nano level surface of aluminum hydroxide modification, but seldom has the non-ionic surface active of bibliographical information " water-in-oil " type to carry out surface modification to the aluminium hydroxide of micron-sized greater particle size.Above-mentioned higher to the cost of nano level Modified by Aluminum Hydroxide with aniorfic surfactant, technique is comparatively complicated.Therefore, the serial nonionic surface active agent of selection class of department of the present invention is to micron-sized surface of aluminum hydroxide modification.The one, investigate with new tensio-active agent surface modification effect how, the 2nd, select the commercially available micron-sized aluminium hydroxide reduction experimental cost of can better drawing materials.
2. coupling agent dry method modification is to utilize coupling agent molecule to form so-called " molecular bridge " (outside Van der Waals force, hydrogen bond, may also have other coordinate bond, ionic linkage and covalent linkage) in surface of aluminum hydroxide, and the bi-material of different in kind is linked together.Thereby the consistency of aluminum hydroxide particles and organic polymer material is improved.For example: " aluminium hydroxide fire retardant of a kind of surface modification and preparation method thereof " (CN200710069077.4) reported that the cruel and silane coupling agent of employing (Asia) phosphoric acid carries out surface treatment in patent, thus dispersiveness and the consistency of raising aluminium hydroxide and polymeric material.Conventional coupling agent mainly contains silane coupling agent and the cruel class coupling agent of metatitanic acid etc.But subsequent technique complexity later of most of coupling agent facile hydrolysiss, modification, the effect of consume energy high, uneconomical and modification are not very desirable, can not be completely Coated with Organic Matter on the surface of aluminium hydroxide, be difficult for realizing industrialization.Therefore, the present invention selects wet-process modified aluminium hydroxide, makes it the more abundant better effects if of modification, realizes that low consumption, low cost, technique are simple, the object of effect.
Summary of the invention
One of object of the present invention is in order to solve above-mentioned aluminium hydroxide additive bad dispersibility, is difficult for the technical problems such as oleophylic and consistency be poor and a kind of aluminium hydroxide of surface modification is provided.The aluminium hydroxide of this surface modification have good lipophilicity, dispersiveness, with the consistency of polymer base material and the feature such as preparation cost is cheap.
Two of object of the present invention is the preparation method of a kind of modified aluminium hydroxide that provides above-mentioned.
Know-why of the present invention
Utilize the hydroxyl generation dehydration reaction in hydrophilic radical and the surface of aluminum hydroxide of tensio-active agent, thereby the lipophilic group that makes tensio-active agent is grafted to aluminium hydrate powder surface, simultaneously physics, the chemisorption in modifying process also can form the adsorption layer of oleophylic outside one deck, can improve the lipophilicity of aluminium hydroxide, thus the consistency of further aluminium hydroxide and polymer base material.
Technical scheme of the present invention
An aluminium hydroxide for surface modification, calculates by weight, and its raw material composition and content are as follows:
30 parts, aluminium hydroxide
Properties-correcting agent 0.9-1.2 part.
Described properties-correcting agent is class of department or department class or department class and sodium stearate composite with stearic acid; Preferably class of department and stearic acid in mass ratio example be the composite of 1:2 or class of department and the sodium stearate routine 1:2 of being composite in mass ratio;
Described class of department is class of department 40, class of department 60 or class of department 80.The preparation method of the aluminium hydroxide of above-mentioned a kind of surface modification, specifically comprises the steps:
(1), the aluminium hydroxide powder of particle diameter 1-30um is joined in deionized water and disperseed, be made into mass percent concentration and be 10% aluminium hydroxide aqeous suspension, be then warming up to 70-90 DEG C;
(2), properties-correcting agent is joined to supersound process 10min in dehydrated alcohol, obtain mass percent concentration and be the ethanolic soln of 1% properties-correcting agent;
(3), control drop rate be the ethanolic soln of the 10ml/min properties-correcting agent that is 1% by mass percent concentration to join mass percent concentration be, in 10% aluminium hydroxide aqeous suspension, to stir with the rotating speed of 500r/min, obtain suspension;
(4), suspension is warming up to 70-90 DEG C, after insulation 0.5-1.5h, leave standstill aluminium hydroxide in suspension cooling and settle down, then suction filtration, the filter cake of gained washs 3-4 time with deionized water, then in 110 DEG C of dry 5h, grind, obtain the aluminium hydroxide of surface modification.
Beneficial effect of the present invention
The aluminium hydroxide of a kind of surface modification of the present invention, because the chief component of the properties-correcting agent of selecting is non-ionic surfactant span 40, class of department 60 or class of department 85, it is different from anion surfactant in many documents, and (HLB is greater than 10, oil-in-water-type), its HLB value is less than 8, belongs to water-in-oil-type.And experiment shows, the effect of the surface modification of the nonionogenic tenside of water-in-oil-type to aluminium hydroxide is than the better effects if of anion surfactant, can reduce the polarity of surface of aluminum hydroxide, thereby make surface of aluminum hydroxide become " hydrophobic oleophylic " from " hydrophilic oleophobic ", can well be dispersed in the whiteruss of simulation Polymer Systems.
Further, the aluminium hydroxide of a kind of surface modification of the present invention, can improve the size distribution situation of aluminium hydroxide powder effectively, thereby is more conducive to its dispersed in polymer base material, and then improve the consistency of itself and base material, reduce the impact on material basic mechanical performance.
Further, the preparation method of the aluminium hydroxide of a kind of surface modification of the present invention, required equipment and technological operation are simple, with low cost, easily realize large batch of industrial production.
Brief description of the drawings
Fig. 1. the size distribution of the forward and backward aluminium hydroxide of modification;
The scanning electron microscope (SEM) photograph of aluminium hydroxide before Fig. 2 a. modification;
The scanning electron microscope (SEM) photograph of aluminium hydroxide after Fig. 2 b. modification.
Embodiment
Following embodiment is to further description of the present invention, but the present invention is not limited to embodiment proposed below.
Embodiment 1
An aluminium hydroxide for surface modification, calculates by weight, and its raw material and content are as follows:
30 parts, aluminium hydroxide
1.2 parts of properties-correcting agent.
Described properties-correcting agent is class of department;
Described class of department is class of department 40.
The preparation method of the aluminium hydroxide of above-mentioned a kind of surface modification, specifically comprises the steps:
(1), 30 parts of aluminium hydroxide powders are joined in a certain amount of deionized water and disperseed, be made into mass percent concentration and be 10% aluminium hydroxide aqeous suspension, be warming up to 80 DEG C;
(2), class of 1.2 parts of properties-correcting agent departments is joined in a certain amount of dehydrated alcohol, supersound process 10min, obtains mass percent concentration and is the ethanolic soln of 1% properties-correcting agent;
(3), control drop rate be the ethanolic soln of the 10ml/min properties-correcting agent that is 1% by mass percent concentration to join mass percent concentration be, in 10% aluminium hydroxide aqeous suspension, to stir with the rotating speed of 500r/min, obtain suspension;
(4), suspension is warming up to 80 DEG C, after insulation 50min, leave standstill aluminium hydroxide in suspension cooling and settle down, then suction filtration, the filter cake of gained washs 3-4 time with deionized water, then in 110 DEG C of dry 5h, grind, obtain the aluminium hydroxide of surface modification.
Fig. 1 is the size distribution figure of the forward and backward aluminium hydroxide of surface modification, the aluminium hydroxide of the surface modification of above-mentioned gained that what the dotted line in Fig. 1 represented is is the size distribution figure of aluminium hydroxide after modification, solid line in Fig. 1 is aluminium hydroxide or the unmodified aluminium hydroxide before modification, i.e. the size distribution figure of raw aluminum hydroxide powder used.As can be seen from Figure 1, the grain size distribution curve of the aluminium hydroxide of the grain size distribution curve of the aluminium hydroxide after modification before than modification slightly narrows, peak of curve has obvious increase, illustrates that the even situation of size distribution of the aluminium hydroxide after modification obtains improvement to a certain extent.
Fig. 2 a is that aluminium hydroxide is the scanning electron microscope (SEM) photograph of raw aluminum hydroxide powder used before modification, and Fig. 2 b is that the aluminium hydroxide of the surface modification of above-mentioned gained is the scanning electron microscope (SEM) photograph of aluminium hydroxide after modification.Can find out that from the scanning electron microscope (SEM) photograph of Fig. 2 a, Fig. 2 b aluminium hydroxide is after surface modification, its granular size is also similar, but dispersed homogeneous degree is improved.
Embodiment 2
An aluminium hydroxide for surface modification, calculates by weight, and its raw material composition and content are as follows:
30 parts, aluminium hydroxide
0.9 part of properties-correcting agent.
Described properties-correcting agent is class of department; Described class of department is class of department 60.
The preparation method of the aluminium hydroxide of above-mentioned a kind of surface modification, specifically comprises the steps:
(1), 30 parts of aluminium hydroxide powders are joined in a certain amount of deionized water and disperseed, be made into mass percent concentration and be 10% aluminium hydroxide aqeous suspension, be then warming up to 85 DEG C;
(2), 0.9 part of department class is joined to supersound process 10min in a certain amount of dehydrated alcohol, obtain mass percent concentration and be the ethanolic soln of 1% properties-correcting agent;
(3), control drop rate be the ethanolic soln of the 10ml/min properties-correcting agent that is 1% by mass percent concentration to join mass percent concentration be, in 10% aluminium hydroxide aqeous suspension, to stir with the rotating speed of 500r/min, obtain suspension;
(4), suspension is warming up to 85 DEG C, after insulation 1h, leave standstill aluminium hydroxide in suspension cooling and settle down, then suction filtration, the filter cake of gained washs 3-4 time with deionized water, then in 110 DEG C of dry 5h, grind, obtain the aluminium hydroxide of surface modification.
Embodiment 3
An aluminium hydroxide for surface modification, calculates by weight, and its raw material composition and content are as follows:
30 parts, aluminium hydroxide
0.3 part of properties-correcting agent.
Described properties-correcting agent is class of department; Described class of department is class of department 85.
The preparation method of the aluminium hydroxide of above-mentioned a kind of surface modification, specifically comprises the steps:
(1), 30 parts of aluminium hydroxide powders are joined in a certain amount of deionized water and disperseed, be made into mass percent concentration and be 10% aluminium hydroxide aqeous suspension, be then warming up to 80 DEG C;
(2), 0.3 part of department class is joined to supersound process 10min in a certain amount of dehydrated alcohol, obtain mass percent concentration and be the ethanolic soln of 1% properties-correcting agent;
(3), control drop rate be the ethanolic soln of the 10ml/min properties-correcting agent that is 1% by mass percent concentration to join mass percent concentration be, in 10% aluminium hydroxide aqeous suspension, to stir with the rotating speed of 500r/min, obtain suspension;
(4), suspension is warming up to 80 DEG C, after insulation 1h, leave standstill aluminium hydroxide in suspension cooling and settle down, then suction filtration, the filter cake of gained washs 3-4 time with deionized water, then in 110 DEG C of dry 5h, grind, obtain the aluminium hydroxide of surface modification.
Embodiment 4
An aluminium hydroxide for surface modification, calculates by weight, and its raw material composition and content are as follows:
30 parts, aluminium hydroxide
0.9 part of properties-correcting agent;
Described properties-correcting agent is that example is 1:2 in mass ratio is composite for Si Ban and stearic acid; Described class of department is class of department 85.
The preparation method of the aluminium hydroxide of above-mentioned a kind of surface modification, specifically comprises the steps:
(1), 30 parts of aluminium hydroxide powders are joined in a certain amount of deionized water and disperseed, be made into mass percent concentration and be 10% aluminium hydroxide aqeous suspension, be then warming up to 80 DEG C;
(2), 85 and 0.6 parts of stearic acid of 0.3 part of class of department are joined respectively in two beakers of a certain amount of dehydrated alcohol, and be respectively put into and process 10min in ultrasonic instrument, then department after treatment class's 85 ethanol solutions and stearic acid ethanol solution are mixed, obtain mass percent concentration and be the ethanolic soln of 1% properties-correcting agent;
(3), control drop rate be the ethanolic soln of the 10ml/min properties-correcting agent that is 1% by mass percent concentration to join mass percent concentration be, in 10% aluminium hydroxide aqeous suspension, to stir with the rotating speed of 500r/min, obtain suspension;
(4), suspension is warming up to 80 DEG C, after insulation 1h, leave standstill until aluminium hydroxide in suspension is cooling and settle down then suction filtration, the filter cake of gained washs 3-4 time with deionized water, then in 110 DEG C of dry 5h, grind, obtain the aluminium hydroxide of surface modification.
Embodiment 5
An aluminium hydroxide for surface modification, calculates by weight, and its raw material composition and content are as follows:
30 parts, aluminium hydroxide
0.9 part of properties-correcting agent.
Described properties-correcting agent is that example is 1:2 in mass ratio is composite for Si Ban and sodium stearate; Described class of department is class of department 85.The preparation method of the aluminium hydroxide of above-mentioned a kind of surface modification, specifically comprises the steps:
(1), 30 parts of aluminium hydroxide powders are joined in a certain amount of deionized water and disperseed, be made into mass percent concentration and be 10% aluminium hydroxide aqeous suspension, be then warming up to 80 DEG C;
(2), 85 and 0.6 parts of sodium stearate of 0.3 part of class of department are joined respectively in two beakers of a certain amount of dehydrated alcohol, and be respectively put into and process 10min in ultrasonic instrument, then department after treatment class's 85 ethanol solutions and sodium stearate ethanol solution are mixed, obtain mass percent concentration and be the ethanolic soln of 1% properties-correcting agent;
(3), control drop rate be the ethanolic soln of the 10ml/min properties-correcting agent that is 1% by mass percent concentration to join mass percent concentration be, in 10% aluminium hydroxide aqeous suspension, to stir with the rotating speed of 500r/min, obtain suspension;
(4), suspension is warming up to 80 DEG C, after insulation 1h, leave standstill aluminium hydroxide in suspension cooling and settle down, then suction filtration, the filter cake of gained washs 3-4 time with deionized water, then in 110 DEG C of dry 5h, grind, obtain the aluminium hydroxide of surface modification.
Control Example 1(is the control Example of embodiment 4)
An aluminium hydroxide for surface modification, calculates by weight, and its raw material composition and content are as follows:
30 parts, aluminium hydroxide
0.9 part of properties-correcting agent.
Described properties-correcting agent is stearic acid.
The preparation method of the aluminium hydroxide of above-mentioned a kind of surface modification, specifically comprises the steps:
(1), 30 parts of aluminium hydroxide powders are joined in a certain amount of deionized water and disperseed, be made into mass percent concentration and be 10% aluminium hydroxide aqeous suspension, be then warming up to 80 DEG C;
(2), 0.9 part of stearic acid is joined to supersound process 10min in a certain amount of dehydrated alcohol, obtain mass percent concentration and be the ethanolic soln of 1% properties-correcting agent;
(3), control drop rate be the ethanolic soln of the 10ml/min properties-correcting agent that is 1% by mass percent concentration to join mass percent concentration be, in 10% aluminium hydroxide aqeous suspension, to stir with the rotating speed of 500r/min, obtain suspension;
(4), suspension is warming up to 80 DEG C, after insulation 1h, leave standstill aluminium hydroxide in suspension cooling and settle down, then suction filtration, the filter cake of gained washs 3-4 time with deionized water, then in 110 DEG C of dry 5h, grind, obtain the aluminium hydroxide of surface modification.
The control Example of control Example 2(embodiment 5)
An aluminium hydroxide for surface modification, calculates by weight, and its raw material composition and content are as follows:
30 parts, aluminium hydroxide
0.9 part of properties-correcting agent.
Described properties-correcting agent is sodium stearate.
The preparation method of the aluminium hydroxide of above-mentioned a kind of surface modification, specifically comprises the steps:
(1), 30 parts of aluminium hydroxide powders are joined in a certain amount of deionized water and disperseed, be made into mass percent concentration and be 10% aluminium hydroxide aqeous suspension, be then warming up to 80 DEG C;
(2), 0.9 part of sodium stearate is joined to supersound process 10min in a certain amount of dehydrated alcohol, obtain mass percent concentration and be the ethanolic soln of 1% properties-correcting agent;
(3), control drop rate be the ethanolic soln of the 10ml/min properties-correcting agent that is 1% by mass percent concentration to join mass percent concentration be, in 10% aluminium hydroxide aqeous suspension, to stir with the rotating speed of 500r/min, obtain suspension;
(4), suspension is warming up to 80 DEG C, after insulation 1h, leave standstill aluminium hydroxide in suspension cooling and settle down, then suction filtration, the filter cake of gained washs 3-4 time with deionized water, then in 110 DEG C of dry 5h, grind, obtain the aluminium hydroxide of surface modification.
The dispersing property test of the aluminium hydroxide of surface modification
Whiteruss is modeled as to general macromolecular material, the aluminium hydroxide of surface modification is placed in to whiteruss, just as aluminium hydroxide is mixed the same with macromolecular material.Investigating the variation of the suspension volume of aluminium hydroxide in whiteruss, is exactly the dispersed effect of indirectly investigating the aluminium hydroxide of surface modification.Larger at regular hour inner suspension volume, illustrate that aluminium hydroxide powder disperses in whiteruss more even.
Concrete testing method is as follows: take respectively raw aluminum hydroxide powder used in 1g embodiment (being aluminium hydroxide before modification), the aluminium hydroxide of the surface modification of embodiment 1-5 gained and control Example 1, the aluminium hydroxide of the surface modification of 2 gained is placed in the tool plug graduated cylinder of 25ml, annex solution paraffin body is to scale marks, supersound process 20min, shake up rear leaving standstill, sedimentation 2h, respectively at sedimentation 10min, 30min, 60min, 90min, 2h records raw aluminum hydroxide powder used in embodiment (being aluminium hydroxide before modification), embodiment 1-5 and control Example 1, the aluminium hydroxide of surface modification in 2 (being the aluminium hydroxide after modification) suspension vol, the results are shown in Table 1.
The aluminium hydroxide of aluminium hydroxide, surface modification suspension volume when 2h in whiteruss before table 1, modification
From the results shown in Table 1, aluminium-hydroxide powder 30min left and right before modification has just been deposited to graduated cylinder bottom, suspension vol is 2ml, particularly after sedimentation 2h, control Example 1, the long-pending 5ml that is respectively of aluminium hydroxide suspensoid of the 2 anion surfactant modifications that adopt, 8ml, and in embodiment 1-5 the suspension vol of the aluminium hydroxide of the surface modification of gained be 11.5-17.5ml not etc., the dispersiveness that aluminium hydroxide before modification is described is thus very poor, polarity is very large, and the dispersing property of the aluminium hydroxide of class of department class nonionogenic tenside surface modification is than unmodified and phase anion surfactant modification
Comparatively speaking, dispersed and surface polarity improves significantly.Particularly better for the dispersing property of the aluminium hydroxide of the modification of embodiment 4, embodiment 5 gained.
In sum, the aluminium hydroxide of a kind of surface modification of the present invention.Because surface adsorption the organic substance of one deck or multilayer its surface polarity and free energy are reduced, so it is large that the suspension volume in whiteruss significantly becomes, illustrate that the aluminium hydroxide of surface modification and the dispersiveness of paraffin and consistency improve significantly, also indirectly illustrate that the aluminium hydroxide of surface modification and the consistency of polymer base material and dispersiveness are improved greatly.From finding out embodiment 1-3 and control Example 1,2: with regard to the nonionic surface active agent modification of class of single-component department series, its modified effect is than the better effects if of aniorfic surfactant modification; The modified effect of the not all Compositional type of many bibliographical informations all can be better than the modified effect of single-component, whether there is the situation than single-component modified better effects if in order to investigate the composite modified effect of anionic surface activity stearic acid or sodium stearate and the nonionic surface active agent of class of department series, so the present invention selects the nonionogenic tenside of class of single-component department series composite modified with single-component anion surfactant stearic acid or sodium stearate respectively.And experimental results show that the composite component that really has composite better effects if, and for example embodiment 4,5 classes of department 85 are composite modified with stearic acid, sodium stearate respectively, and experiment shows: the modified effect of Compositional type is better than the modified effect of single-component.
Foregoing is only the basic explanation of the present invention under conceiving, and according to any equivalent transformation that technical scheme of the present invention is done, all should belong to protection scope of the present invention.
Claims (4)
1. an aluminium hydroxide for surface modification, is characterized in that the aluminium hydroxide of described surface modification is calculated according to the mass fraction, and its raw material composition and content are as follows:
30 parts, aluminium hydroxide
Properties-correcting agent 0.3-1.2 part;
What described properties-correcting agent was department class or class of department with stearic composite or class of department and sodium stearate is composite;
Described class of department is class of department 40, class of department 60 or class of department 85.
2. the aluminium hydroxide of a kind of surface modification as claimed in claim 1, is characterized in that described properties-correcting agent is Si Ban and the stearic acid composite or class of department that example is 1:2 in mass ratio and the sodium stearate routine 1:2 of being composite in mass ratio.
3. the aluminium hydroxide of a kind of surface modification as claimed in claim 2, is characterized in that described class of properties-correcting agent department is for class of department 85.
4. the preparation method of a kind of modified aluminium hydroxide as described in claim 1,2 or 3, is characterized in that specifically comprising the steps:
(1), aluminium hydroxide powder is joined in deionized water and disperseed, be made into mass percent concentration and be 10% aluminium hydroxide aqeous suspension, be then warming up to 70-90 DEG C and there-necked flask is fixed in the water-bath of certain temperature;
(2), properties-correcting agent is joined to supersound process 10min in dehydrated alcohol, obtain mass percent concentration and be the ethanolic soln of 1% properties-correcting agent;
(3), control drop rate be the ethanolic soln of the 10ml/min properties-correcting agent that is 1% by mass percent concentration to join mass percent concentration be, in 10% aluminium hydroxide aqeous suspension, to stir with the rotating speed of 500r/min, obtain suspension;
(4), suspension is warming up to 70-90 DEG C, after insulation 0.5-1.5h, leave standstill cooling the precipitating of aluminium hydroxide in suspension, then suction filtration, the filter cake of gained washs 3-4 time with deionized water, then in 110 DEG C of dry 5h, grind, obtain the aluminium hydroxide of surface modification.
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| CN104893365A (en) * | 2015-06-18 | 2015-09-09 | 淄博鹏丰铝业有限公司 | Production method for aluminum hydroxide micro-powder subjected to surface coating and modification |
| CN110436499A (en) * | 2019-08-23 | 2019-11-12 | 山东省化工研究院 | A kind of regulation method of ultrafine aluminium hydroxide oil factor |
| CN110499035A (en) * | 2019-09-27 | 2019-11-26 | 郑州航空工业管理学院 | A kind of warm mix flame-retardant pitch and preparation method thereof |
| CN114907713A (en) * | 2021-07-12 | 2022-08-16 | 合肥中科阻燃新材料有限公司 | Aluminum-magnesium composite flame retardant and preparation method thereof |
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| CN101392104A (en) * | 2008-11-11 | 2009-03-25 | 中国铝业股份有限公司 | Method for preparing surface modified superfine aluminium hydroxide |
| CN102502742A (en) * | 2011-11-07 | 2012-06-20 | 河南煤业化工集团研究院有限责任公司 | Method for preparing high-whiteness aluminium hydroxide micropowder from Bayer process sodium aluminate solution |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104893365A (en) * | 2015-06-18 | 2015-09-09 | 淄博鹏丰铝业有限公司 | Production method for aluminum hydroxide micro-powder subjected to surface coating and modification |
| CN104893365B (en) * | 2015-06-18 | 2017-06-13 | 淄博鹏丰铝业有限公司 | A kind of production method of surface coating modification aluminium hydroxide micro powder |
| CN110436499A (en) * | 2019-08-23 | 2019-11-12 | 山东省化工研究院 | A kind of regulation method of ultrafine aluminium hydroxide oil factor |
| CN110436499B (en) * | 2019-08-23 | 2022-04-26 | 山东省化工研究院 | Method for regulating and controlling oil absorption value of superfine aluminum hydroxide |
| CN110499035A (en) * | 2019-09-27 | 2019-11-26 | 郑州航空工业管理学院 | A kind of warm mix flame-retardant pitch and preparation method thereof |
| CN114907713A (en) * | 2021-07-12 | 2022-08-16 | 合肥中科阻燃新材料有限公司 | Aluminum-magnesium composite flame retardant and preparation method thereof |
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