Double-wall-layer intumescent fireproof flame retardant co-microcapsule and preparation method thereof

An intumescent, flame retardant technology, used in the field of flame retardants, can solve the problems of foaming and falling off, easy wrinkling, poor compatibility, etc., and achieve the effects of improving coating efficiency, enhancing hydrophobicity, and improving water resistance.

Inactive Publication Date: 2021-04-30
三棵树(上海)新材料研究有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Intumescent flame retardants have strong hydrophilicity and poor compatibility with polymers. At the same time, the water resistance of the coating is generally poor, and it is easy to wrinkle, foam and fall off, which limits the application of water-based fire retardant coatings.
[0006] Only hydrophobic modification of APP cannot effectively improve the water resistance of the coating, because PER commonly used in intumescent fire retardants is completely water-soluble, and MEL also has a certain degree of hydrophilicity, and their influence on the water resistance of the coating cannot be ignored

Method used

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  • Double-wall-layer intumescent fireproof flame retardant co-microcapsule and preparation method thereof
  • Double-wall-layer intumescent fireproof flame retardant co-microcapsule and preparation method thereof

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preparation example Construction

[0030] A kind of preparation method of double-walled intumescent fire retardant co-microcapsules, such as figure 1 As shown, the specific steps are as follows:

[0031] Step S1, the mixture of epoxy resin-coated intumescent fire retardant acid source, carbon source and gas source:

[0032] Mix 10-30g of epoxy resin and 120-300g of solvent evenly at 100-300rpm stirring condition, then add 90-110g of the mixture of intumescent fire retardant acid source, carbon source and gas source, and in 40- Stir in a constant temperature water bath at 50°C for 30-60min at a constant temperature at a speed of 1000-5000rpm, then add 1-8g of amine curing agent, react for 2-4h, filter with suction, and dry at 50°C for 36-48h to obtain EP-Mix ;

[0033] Step S2, melamine-formaldehyde resin coating epoxy resin:

[0034] Add 10-20g of melamine, 10-25g of formaldehyde solution (37%) and 80-120g of water into a 500ml four-neck flask, stir thoroughly, adjust the pH of the above solution to 7.5-9 wi...

Embodiment 1

[0041]Mixture of epoxy resin-coated intumescent fire retardant acid source, carbon source and gas source: Mix 15g epoxy resin and 150g acetone at 150rpm under stirring condition, then add 100g of APP, PER and MEL mixture, and mix at 50 ℃ Stir in a constant temperature water bath for 30min at a constant temperature at a stirring rate of 2000rpm, then add 2.2g of triethylenetetramine curing agent, raise the temperature to 70°C, react for 2h, filter with suction, and dry at 50°C for 36h to obtain EP-Mix.

[0042] Melamine-formaldehyde resin coated epoxy resin:

[0043] 13g of melamine, 10g of formaldehyde solution (37%) and 77g of water were added to a 250ml four-neck flask, fully stirred, and the pH of the above solution was adjusted to 7.5 with saturated aqueous sodium carbonate solution, then the temperature was raised to 80°C while stirring, and the reaction was carried out for 45min. That is, the MF resin prepolymer is obtained.

[0044] Under stirring conditions, add 20g o...

Embodiment 2

[0046] Epoxy resin-coated intumescent fire retardant mixture of acid source, carbon source and gas source:

[0047] Mix 10g of epoxy resin and 120g of acetone at 300rpm and mix evenly, then add 100g of APP, PER and MEL mixture, and stir in a constant temperature water bath at 40°C for 60min at a speed of 2000rpm, then add 1.5g of triethylenetetramine curing agent , reacted for 4h, filtered with suction, and dried at 50°C for 48h to obtain EP-Mix.

[0048] Melamine-formaldehyde resin coated epoxy resin:

[0049] Add 20 g of melamine, 25 g of formaldehyde solution (37%) and 120 g of water into a 500 ml four-neck flask, stir thoroughly, adjust the pH of the above solution to 8 with saturated aqueous sodium carbonate solution, then heat up to 70 ° C while stirring, and react for 45 min. That is, the MF resin prepolymer is obtained.

[0050] Under stirring conditions, add 100g of the above-mentioned MF resin prepolymer solution, then add 40g of absolute ethanol and 100g of deioni...

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Abstract

The invention relates to a double-wall-layer intumescent fireproof flame retardant co-microcapsule, which comprises a core material, wherein the outer layer of the core material is coated with a first layer of wall material, the outer layer of the first layer of wall material is coated with a second layer of wall material, the core material is a mixture of an intumescent fireproof flame retardant acid source, a carbon source and a gas source, and the first layer of wall material is epoxy resin; and the second layer of wall material is made of melamine-formaldehyde resin. A two-step coating method is adopted to carry out double-layer microencapsulation on an acid source ammonium polyphosphate with relatively strong hydrophilicity, a carbon source pentaerythritol completely soluble in water and melamine slightly soluble in water, so that the coating efficiency is improved, and meanwhile, the hydrophobicity is enhanced; when the material is added into the fireproof coating, the water resistance of the coating is not influenced, and meanwhile, a relatively good fireproof effect can be achieved. According to the technical scheme, the possibility is provided for preparing the water-based paint with fireproof and anti-corrosion functions at the same time.

Description

technical field [0001] The invention relates to the technical field of flame retardants, in particular to a double-wall intumescent fire retardant co-microcapsule and a preparation method thereof. Background technique [0002] At present, the use of steel structures in large buildings is becoming more and more common. Although steel cannot be burned, its mechanical strength will drop sharply as the temperature rises. When the temperature rises to the critical point of steel, the steel will lose its bearing capacity; therefore, when When a fire breaks out in a building, the building collapses due to the loss of bearing capacity of the steel as the temperature rises; the steel structure fire retardant coating can prolong the process of the steel structure reaching the critical temperature as much as possible, thereby gaining the time to put out the fire and save people, which is the guarantee of life rescue. [0003] The surface of the intumescent flame retardant material can ...

Claims

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Application Information

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IPC IPC(8): C09D5/18C08K9/10C08K3/32C08K5/053C08K5/3492B01J13/02
CPCB01J13/02C08K3/32C08K5/053C08K5/34922C08K9/10C08K2003/323C09D5/185
Inventor 姜美佳秦玉猛姜丽莎付绍祥洪杰
Owner 三棵树(上海)新材料研究有限公司
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