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Core-shell-structure phosphorus-nitrogen compound modified hydrotalcite-like flame retardant and preparation method thereof

A technology of shell structure and compound, which is applied in the field of core-shell structure phosphorus nitrogen compound modified hydrotalcite-like flame retardant and its preparation, can solve the problems of poor compatibility between inorganic hydrotalcite-like and polymer materials, and reduce heat Effect of release rate, increased interlayer spacing, and good action

Inactive Publication Date: 2012-12-19
SHANDONG AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the technical problems in the above method and the poor compatibility of inorganic hydrotalcites and polymer materials, etc.

Method used

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  • Core-shell-structure phosphorus-nitrogen compound modified hydrotalcite-like flame retardant and preparation method thereof
  • Core-shell-structure phosphorus-nitrogen compound modified hydrotalcite-like flame retardant and preparation method thereof
  • Core-shell-structure phosphorus-nitrogen compound modified hydrotalcite-like flame retardant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Dissolve 7.5g of melamine and 4mL of 37% formaldehyde (molar ratio is 3:1) in 20mL of deionized water, add 10% sodium carbonate solution drop by drop under stirring conditions to adjust pH=8, heat to 80 ° C constant temperature reaction 1h.

[0032] (2) Dissolve 40g of ammonium polyphosphate into 150mL of ethanol, then add the solution described in (1), adjust the pH between 4 and 5 with 1mol / L sulfuric acid, heat to 80°C for 2 hours at a constant temperature, after the reaction, filter with suction , washed and dried at 60°C.

[0033] (3) Dissolve 0.5g of the substance obtained in (2) and 0.5g of 4,4'-dicarboxydiphenyl ether in 100mL of dichloromethane, stir at room temperature for 24 hours, centrifuge, filter with suction, wash, and dry at 60°C to obtain the nucleus -Phosphorus nitrogen compounds with a shell structure. Its TGA-DTG curve is as follows Figure 4 shown.

[0034] ⑷The 3.60g MgCl 2 ·6H 2 O and 2.25g AlCl 3 ·6H 2 O was dissolved in 100 mL deion...

Embodiment 2

[0038] The method steps of preparing the core-shell structure phosphorus nitrogen compound modified hydrotalcite-like flame retardant are the same as those described in Example 1, the ammonium polyphosphate and 4,4'-dicarboxyl Take 0.5g and 0.4g of diphenyl ether respectively.

Embodiment 3

[0040] The method steps for preparing a core-shell structure phosphorus nitrogen compound modified hydrotalcite-like flame retardant are the same as those described in Example 1, except that 4,4'-dicarboxydiphenyl ether in (3) is replaced by malonic acid.

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Abstract

The invention relates to a core-shell-structure phosphorus-nitrogen compound modified hydrotalcite-like flame retardant and a preparation method thereof. The core material is ammonium polyphosphate, the shell material is melamine formaldehyde resin, and a dicarboxylic acid, of which the molecular formula is HOOC-R-COOH is grafted outside the shell, wherein R is alkylidene group, phenyl group, alkyl ether or phenyl ether; and the core-shell-structure phosphorus-nitrogen and a hydrotalcite-like compound, of which the molecular formula is [MII(1-x)MIIIx(OH)2]x+[An-x / n]x-.mH2O are subjected to ion-exchange reaction to obtain the composite material. The flame retardant effectively combines the expansion phosphorus-nitrogen flame retardant with the inorganic flame retardant hydrotalcite-like compound; and under the synergistic action, the flame retardant has better flame retardancy, enhances the compatibility of the hydrotalcite-like compound with high molecular materials, and lowers the addition amount of the hydrotalcite-like compound.

Description

(1) Technical field [0001] The invention relates to a core-shell structure phosphorus nitrogen compound modified hydrotalcite-like flame retardant and a preparation method thereof, belonging to the technical field of composite materials. (2) Background technology [0002] Flame retardant is one of the important additives in the processing of synthetic polymer materials. Its function is to make synthetic materials flame retardant, self-extinguishing and smoke extinguishing. With the advancement of science and the improvement of environmental protection awareness, people have not only developed flame retardants with better performance, but also put forward stricter requirements for the flame retardants themselves and the environmental protection issues during use. Halogen-free, low-toxicity, composite, and smoke-suppressing flame retardants have become the overall development trend of flame retardants in the 21st century. [0003] At present, the common flame retardants inclu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K9/04C08K9/02C08K3/26C08K3/30C08K3/22C08K3/28C08L23/12
Inventor 艾士云乔志殷焕顺范海董静张坤
Owner SHANDONG AGRICULTURAL UNIVERSITY
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