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A preparation method of in-situ composite nano ceria/magnesium hydroxide flame retardant and smoke suppressant for RTV

A technology of nano-cerium dioxide and in-situ compounding, applied in the field of materials, can solve the problems of few reports on smoke suppressant additives

Active Publication Date: 2020-09-25
THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are many RTV flame retardant additives, but there are few reports on smoke suppressant additives

Method used

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  • A preparation method of in-situ composite nano ceria/magnesium hydroxide flame retardant and smoke suppressant for RTV

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] First prepare 1000mL of 0.1mol / L magnesium nitrate solution, transfer the solution into a stirring tank, and under constant stirring, control the temperature of the stirring tank at 30°C, and then add 0.1mol / L dropwise at a rate of 1.0mL / min sodium hydroxide solution until the pH is 8.0, stop the dropwise addition of the sodium hydroxide solution, and continue stirring for 30 min after the dropwise addition is completed.

[0019] After the above reaction is completed, add 0.05mol of cerous nitrate, stir to dissolve, then transfer it to a hydrothermal kettle, adjust the rotation speed of the hydrothermal kettle to 10rpm / min, and react at 140°C for 12h. After the reaction is completed, centrifuge and wash to obtain the in-situ composite nano ceria / magnesium hydroxide flame retardant and smoke suppressant.

[0020] Add the above-mentioned in-situ composite nano ceria / magnesium hydroxide flame retardant and smoke suppressant to room temperature vulcanized silicone rubber (T...

Embodiment 2

[0026] First prepare 1000 mL of 5.0 mol / L magnesium chloride solution, transfer the solution into a stirred tank, control the temperature of the stirred tank at 90°C, then add 5.0 mol / L ammonia solution dropwise at a rate of 50 mL / min until the pH is 12.0 and stop Aqueous ammonia solution was added dropwise, and stirring was continued for 1 h.

[0027] After the above reaction is completed, add 0.5 mol of cerous chloride, stir and dissolve, then transfer it to a hydrothermal kettle, adjust the speed of the hydrothermal kettle to 800rpm / min, and react at 180°C for 48h. After the reaction is completed, After centrifugation and washing, the in-situ composite nano ceria / magnesium hydroxide flame retardant and smoke suppressant is obtained.

[0028] The above-mentioned in-situ composite nano-cerium oxide / magnesium hydroxide flame retardant and smoke suppressant was added to room temperature vulcanized silicone rubber according to the formula in Example 1, and when the addition was ...

Embodiment 3

[0032] Transfer 1000 mL of 1.0 mol / L magnesium chloride solution into the stirring tank, control the temperature of the stirring tank at 60°C, then add 3.0 mol / L potassium hydroxide solution dropwise at a rate of 10 mL / min until the pH is 10.0 and stop dripping Potassium hydroxide solution was added, and stirring was continued for 0.5h.

[0033] After the above reaction is completed, add 0.25mol of cerous chloride, stir to dissolve, then transfer it to the hydrothermal kettle, adjust the speed of the hydrothermal kettle to 100rpm / min, and react at 160°C for 24h, and the reaction is completed. After centrifugation and washing, the in-situ composite nano ceria / magnesium hydroxide flame retardant and smoke suppressant is obtained.

[0034] The above-mentioned in-situ composite nano-cerium oxide / magnesium hydroxide flame retardant and smoke suppressant was added to room temperature vulcanized silicone rubber according to the formula in Example 1, and when the addition was 30 parts...

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Abstract

The invention relates to a preparation method for a flame-retarding and smoke-inhibiting agent, which has high flame-retarding and smoke-inhibiting effect and is used for room temperature vulcanized (RTV) silicone rubber. The preparation method includes the steps of: 1) dropwise adding a precipitator slowly to a magnesium salt water solution at certain temperature to perform a precipitation reaction; 2) when the reaction is finished, adding a cerium salt in certain amount, and moving the solution to a hydrothermal kettle for secondary reaction with regulation on the rotation speed of a stirring blade in the hydrothermal kettle to complete a hydrothermal reaction at certain temperature for certain time, and finally centrifugally separating a product to prepare the in-situ composite nano CeO2 / MgOH flame-retarding and smoke-inhibiting agent. The in-situ composite nano CeO2 / MgOH flame-retarding and smoke-inhibiting agent has excellent flame-retarding and smoke-inhibiting effect in application of the RTV silicone rubber.

Description

technical field [0001] The invention belongs to the field of materials, and in particular relates to a preparation method of an in-situ composite nano ceria / magnesium hydroxide flame-retardant and smoke-suppressing agent used for room-temperature vulcanized silicone rubber (RTV) flame-retardant and highly efficient smoke-suppressor. [0002] technical background [0003] Room temperature vulcanized silicone rubber (RTV) is a kind of liquid silicone rubber, which came out in the 1960s. It can be cured at room temperature and is very convenient to use. Room temperature vulcanized silicone rubber is currently widely used, such as silicone building sealant (RTV sealant), automotive sealant, fixing and sealing of electrical and electronic components, anti-pollution flashover coatings for power systems, etc. [0004] However, pure room temperature vulcanized silicone rubber does not have flame retardancy, and it is difficult to directly apply it to engineering applications. Therefo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L83/06C08K3/22C01F17/10C01F17/235C01F5/20C01F5/22
CPCC01F5/20C01F5/22C01F17/206C08K3/22C08K2003/2213C08K2003/2224C08K2201/011C08L2201/02C08L2201/14C08L83/06
Inventor 沈根利王奇王震
Owner THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA