Hydrotalcite used in polymer and preparation method thereof
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A hydrotalcite and polymer technology, applied in the direction of zinc compounds, aluminum compounds, chemical instruments and methods, etc., can solve problems such as unsatisfactory effects, and achieve good light stability, good compatibility, and good transparency
Active Publication Date: 2016-02-03
GCH TECH
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Problems solved by technology
[0009] The hydrotalcite used in the above invention patent does not form a good structure-activity relationship among structure, particle size and specific surface area, resulting in unsatisfactory effects when applied to polymer production, acid absorption effect and transparency performance. In particular, there are still many problems to be solved in terms of the effect of acid absorption
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Embodiment 1
[0029] Example 1: Mg 4 Al 2 (OH) 12 CO 3 4H 2 Preparation of O
[0030] 0.5 mol of Mg(HCO 3 )2 , 2 mol NaAlO 2 , 1 MgCl 2 , 2.5 moles of Mg(OH) 2 and 7.0 moles of H 2 O mixed, fully stirred, heated to 78 ° C ± 1, and kept stirring for 3 hours to obtain the hydrotalcite product 1.
[0031] The hydrotalcite product 1 was characterized by XRD, NMR, FT-IR and XPS to verify the structure of the hydrotalcite product 1, which is Mg 4 al 2 (OH) 12 CO 3 4H 2 O.
Embodiment 2
[0032] Example 2: Mg 3.35 Zn 0.65 al 2 (OH) 12 CO 3 4H 2 Preparation of O
[0033] 0.5 mol of Mg(HCO 3 ) 2 , 2 mol NaAlO 2 , 0.65 mol ZnCl 2 and 0.35 molar MgCl 2 , 2.5 moles of Mg(OH) 2 and 7.0 moles of H 2 O mixed, fully stirred, heated to 82 ° C ± 1, and kept stirring for 3.5 hours to obtain the hydrotalcite product 2.
[0034] The hydrotalcite product 2 was characterized by XRD, NMR, FT-IR and XPS to verify the structure of the hydrotalcite product 2, which is Mg 3.35 Zn 0.65 al 2 (OH) 12 CO 3 4H 2 O.
Embodiment 3
[0035] Example 3: Mg 5 al 2.5 (OH) 15 (CO 3 ) 1.25 4H 2 Preparation of O
[0036] 0.625 moles of Mg(HCO 3 ) 2 , 2.5 mol NaAlO 2 , 1.25 mol MgCl 2 , 3.125 moles of Mg(OH) 2 and 7.75 moles of H 2 O mixed, fully stirred, heated to 78 ° C ± 1, and kept stirring for 3 hours to obtain the hydrotalcite product 3.
[0037] The hydrotalcite product 3 was characterized by XRD, NMR, FT-IR and XPS to verify the structure of the hydrotalcite product 3, which is Mg 5 al 2.5 (OH) 15 (CO 3 ) 1.25 4H 2 O.
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Abstract
The invention relates to a hydrotalcite used in polymer and a preparation method thereof. The chemical structural formula of the hydrotalcite is M<2+><x>M<3+><y>(OH)<2x+3y-x/2>(CO<3>)<x/4>.4H2O, wherein M<2+> is a divalent metal ion or a mixture of divalent metal ions and is one or two selected from the group consisting of Mg<2+>, Ca<2+>, Ni<2+>, Zn<2+>, Mn<2+>, Cu<2+>, Co<2+>, Pd<2+> and Fe<2+>, M<3+> is a trivalent metal ion and is one selected from the group consisting of Al<3+>, Ga<3+> and In<3+>, x and y are positive numbers, and x/y is equal to 2 to 2.5. The D50 of the hydrotalcite is less than 0.150, and the specific surface area of the hydrotalcite is greater than 30 m2/g. Compared with conventional hydrotalcite filling materials and like, the hydrotalcite provided by the invention has good compatibility with PVC, is free of volatilization, migration and efflorescence, and can be used as a good acid absorption agent for processing of soft, hard and transparent, or non-transparent PVC and as a good stabilizing agent for an organic halogen fire retardant.
Description
technical field [0001] The invention belongs to the field of polymer fillers, in particular to a hydrotalcite used in polymers and a preparation method thereof. Background technique [0002] The hydrotalcite-like compound Hydrotalcite-likecompounds is referred to as HTLc, and the first discovered natural hydrotalcite of magnesium aluminum. It was subsequently found that hydrotalcite-like layered compounds have many structures. HTLc has been widely used in catalysts, catalyst precursors, ion exchange, separation materials, flame retardants, polymer stabilizers, photoelectric active substances, biosensors, and drug release agents. However, hydrotalcites of different structures have different uses. [0003] The use of at least one calcined hydrotalcite and / or hydrotalcite intercalated with at least one anionic surfactant as filler in polymer-containing compositions is disclosed in patent application 01811364.8. [0004] In the patent application 200910099147.X, a preparation...
Claims
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