CN103508480A - Preparation method of magnesium aluminum lanthanum type hydrotalcite PVC composite heat stabilizer - Google Patents
Preparation method of magnesium aluminum lanthanum type hydrotalcite PVC composite heat stabilizer Download PDFInfo
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- CN103508480A CN103508480A CN201310300700.8A CN201310300700A CN103508480A CN 103508480 A CN103508480 A CN 103508480A CN 201310300700 A CN201310300700 A CN 201310300700A CN 103508480 A CN103508480 A CN 103508480A
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- type hydrotalcite
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Abstract
The invention relates to a preparation method of a magnesium aluminum lanthanum type hydrotalcite PVC composite heat stabilizer. The heat stabilizer is composed of carbonate of magnesium aluminium lanthanum, and synthesized by a heating precipitation method. The method provided by the invention only needs preparation of a mixed salt solution and a mixed alkali solution and omits organic acidity or titanate modification, so as to simplify steps; and only atmospheric precipitation rather than pressurized aging is required; therefore the preparation process is simple, saves cost and causes no pollution.
Description
Technical field
The present invention relates to a kind of new hydrotalcite PVC composite thermal stabilizer, be specifically related to magnalium lanthanum type hydrotalcite PVC composite thermal stabilizer preparation technology.
Background technology
Polyvinyl chloride (PVC) is one of plastic articles being most widely used at present, due to its cheapness, intensity is high, corrosion-resistant and the transparent advantage such as good enjoys consumers in general's favor.But because PVC is in external factor, under the condition of the factors such as light, heat, oxygen, easily there is degraded and crosslinking reaction, make its processing difficulties, degradation.Aging and degraded is inevitable problem in the PVC course of processing, so will add some stablizers in the process of PVC processing, improves the performance of PVC.
Hydrotalcite thermo-stabilizer is the class novel inorganic PVC auxiliary stabilizer that Japan developed in the eighties in 20th century, and its thermostable effect Bi Bei soap, calcium soap and their mixture are good.In addition, it also has advantages of that good, the good insulating of the transparency, good weatherability and processibility are good, is not subject to the pollution of sulfide, nontoxic, can play synergy with the thermo-stabilizer such as zinc soap and organotin, is the nontoxic auxiliary heat stabilizer of a class that the utmost point has DEVELOPMENT PROSPECT.
At present existing have about hydrotalcite PVC composite thermal stabilizer: (1) Mg-Ca-Zn-Al four-component hydrotalcite heat stabilizer, this stablizer needs Mg in the middle of the process of preparation
2+, Ca
2+, Zn
2+, Al
3+deng four kinds of salts substances of needs, raw material is many, carry out respectively preparation, calcium salt soln preparation, the mixed alkali liquor preparation of mixing salt solution, and the ageing of also will pressurizeing makes the technique of preparation become complicated like this; (2) hydrotalcite-rare earth-calcium zinc stabilizer, this is pillared hydrotalcite, unsaturated fatty acids acid rare earth, direct synthesis technique epoxyfatty acid calcium zinc for stablizer, through appropriate design, select best synergistic effect, carry out that the techniques such as chemosynthesis, modifying process, optimization be composite are prepared from.In process prepared by this stablizer, need modified with organic acids, make equally preparation technology become loaded down with trivial details; (3) a kind ofly by magnesium aluminum-hydrotalcite, zinc-aluminum hydrotalcite, mix by a certain percentage the composite composite thermal stabilizer forming, wherein magnesium aluminum-hydrotalcite and zinc-aluminum hydrotalcite also will pass through stearic modification, make so too the process of preparation become complicated, raw materials for production increase, and cost uprises; (4) composite thermal stabilizer, this magnesium/aluminum rare-earth hydrotalcite is also wet-process modified through titanic acid ester.
Existing about hydrotalcite PVC composite thermal stabilizer, mostly in preparation process, need to use multiple solution preparation, or use organic acid or titanic acid ester modification, or multiple thermo-stabilizer is composite, make like this to use more raw materials for production in the process of preparation, cost uprises, and it is complicated that preparation technology becomes, and also likely produces aborning more pollution simultaneously.
Summary of the invention
Main purpose of the present invention is to overcome the shortcoming of existing technology, and a kind of preparation method with the magnalium lanthanum type hydrotalcite PVC thermo-stabilizer of good thermostability and processing characteristics is provided.
The present invention adopts following technical scheme: magnalium lanthanum hydrotalcite PVC thermo-stabilizer, is comprised of the carbonate of magnalium lanthanum.The carbonate of this magnalium lanthanum is prepared as follows by following technique:
1) salts solution of magnesium, aluminium and lanthanum is mixed by stoichiometric ratio, obtain mixed solution A preheating.Salts solution can be nitrate, vitriol, hydrochloride etc.; Preheating temperature is 70-90 ℃.
2) above-mentioned mixed solution A is mixed and stirred with the alkaline solution B that meets stoichiometric ratio of preparation, crystallization, filters, washing.Alkaline solution, can be sodium hydroxide, sodium carbonate, ammoniacal liquor, and their mixture.
From description of the invention, the present invention adopts thermal precipitation method to synthesize magnalium lanthanum hydrotalcite stablizer.Compare with conventional art, as long as the present invention carries out the preparation of mixing salt solution and mixed ammonium/alkali solutions, without the need for machine acid or titanic acid ester modification, simplify step, and do not need the ageing of pressurizeing, only need normal pressure precipitation, therefore preparation technology is simple, cost-saving and technique is pollution-free.In addition, stablizer of the present invention can be separately as the thermo-stabilizer of PVC, can not need to composite with other thermo-stabilizer, can avoid, because stablizer not of the same race causes mixing inhomogeneous defect due to composite, producing equally good thermostable effect.
Embodiment
Below concrete enforcement prepared by magnalium lanthanum type hydrotalcite PVC composite thermal stabilizer of the present invention is made a more detailed description.
But, it will be appreciated by those skilled in the art that these embodiments have only enumerated some specific embodiments of the invention, without any restrictions to the present invention and protection domain thereof.Those skilled in the art is understanding under the situation of the basic design of the present invention, can carry out some apparent variation and changes to these, and these are all within the scope of the present invention.Scope of the present invention is only limited by claim.
The synthetic employing thermal precipitation method of magnalium lanthanum type hydrotalcite.Specific embodiment is as follows:
1) take 5.12 g magnesium nitrates, 2.25 g aluminum nitrates and 1.73 g lanthanum nitrates, be dissolved in 50mL distilled water and make mixed solution A, be preheated to 80 ℃; Get 2.86 g sodium hydroxide and 1.06 g anhydrous sodium carbonates and be dissolved in 50mL distilled water and make mixing solutions B, be preheated to 80 ℃;
2) preset 50mL distilled water in 250mL there-necked flask, is preheated to 80 ℃;
3) by mixed liquor A, the rapid impouring step of B there-necked flask, vigorous stirring 2 h;
4) after stopping stirring, slurries are standing crystallization 24 h at 90 ℃;
5) by the hydrotalcite slurries after crystallization in 90 ℃ of filtrations, with hot water fully wash to filtrate be PH < 8;
6) by the filter cake in step 5) 80 ℃ of oven dry, then sealed storage.
Claims (4)
1. the preparation method of magnalium lanthanum type hydrotalcite PVC composite thermal stabilizer, is characterized in that:
The salts solution of magnesium, aluminium and lanthanum is mixed by stoichiometric ratio, obtain mixed solution A preheating;
Above-mentioned mixed solution A is mixed and stirred with the alkaline solution B of stoichiometric ratio, and crystallization, filters, washing.
2. the preparation method of magnalium lanthanum type hydrotalcite PVC composite thermal stabilizer as claimed in claim 1, is characterized in that: described salts solution is nitrate solution sulfate liquor, hydrochloric acid soln etc.
3. the preparation method of magnalium lanthanum type hydrotalcite PVC composite thermal stabilizer as claimed in claim 2, is characterized in that: described alkaline solution is sodium hydroxide sodium carbonate, ammoniacal liquor, or their mixture.
4. the preparation method of magnalium lanthanum type hydrotalcite PVC composite thermal stabilizer as claimed in claim 1, is characterized in that: described preheating temperature is 70-90 ℃.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310300700.8A CN103508480A (en) | 2013-07-18 | 2013-07-18 | Preparation method of magnesium aluminum lanthanum type hydrotalcite PVC composite heat stabilizer |
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| CN201310300700.8A CN103508480A (en) | 2013-07-18 | 2013-07-18 | Preparation method of magnesium aluminum lanthanum type hydrotalcite PVC composite heat stabilizer |
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| CN201310300700.8A Pending CN103508480A (en) | 2013-07-18 | 2013-07-18 | Preparation method of magnesium aluminum lanthanum type hydrotalcite PVC composite heat stabilizer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111302309A (en) * | 2020-01-20 | 2020-06-19 | 泰安渤洋化工科技有限公司 | Process device and method for continuous crystal form passivation and modification of hydrotalcite product |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101302031A (en) * | 2007-05-09 | 2008-11-12 | 广东炜林纳功能材料有限公司 | Magnesium, aluminum and rare earth three-element hydrotalcite, preparation and use thereof |
| CN101508796A (en) * | 2009-03-25 | 2009-08-19 | 江西宏远化工有限公司 | Ternary hydrotalcite-rare earth-calcium/zinc nontoxic composite heat stabilizer and preparation thereof |
-
2013
- 2013-07-18 CN CN201310300700.8A patent/CN103508480A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101302031A (en) * | 2007-05-09 | 2008-11-12 | 广东炜林纳功能材料有限公司 | Magnesium, aluminum and rare earth three-element hydrotalcite, preparation and use thereof |
| CN101508796A (en) * | 2009-03-25 | 2009-08-19 | 江西宏远化工有限公司 | Ternary hydrotalcite-rare earth-calcium/zinc nontoxic composite heat stabilizer and preparation thereof |
Non-Patent Citations (3)
| Title |
|---|
| 朱健: "水滑石类化合物的制备、改性及其在PVC中的应用", 《中国优秀硕士学位论文数据库 工程科技Ⅰ辑》 * |
| 杨占红等: "PVC 用热稳定剂镁铝铈类水滑石的合成", 《中南大学学报》 * |
| 谌伟庆等: "镁铝型水滑石复合热稳定剂的研究", 《塑料》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111302309A (en) * | 2020-01-20 | 2020-06-19 | 泰安渤洋化工科技有限公司 | Process device and method for continuous crystal form passivation and modification of hydrotalcite product |
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Application publication date: 20140115 |