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Water-resistant core-shell flame retardant and its application in the preparation of polyurethane composites

A technology of core-shell structure and flame retardant, which is applied in the field of flame retardant materials, can solve the problems of loss of effective flame retardant and decline of flame retardant performance, and achieve the effect of maintaining flame retardant effect

Active Publication Date: 2017-02-01
国科广化(南雄)新材料研究院有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to its own structure, APP is highly hygroscopic and easily soluble in water.
Therefore, when used in polyurethane rigid foam, it is easy to migrate to the surface of the material, resulting in the loss of effective flame retardants, resulting in a decrease in flame retardant performance

Method used

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  • Water-resistant core-shell flame retardant and its application in the preparation of polyurethane composites

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Preparation of water-resistant core-shell structure flame retardant:

[0027] Add ammonium polyphosphate (APP) powder to 100mL of absolute ethanol at room temperature, stir and heat up to 50°C, add 12g of melamine-formaldehyde prepolymer, raise the temperature to 60°C, adjust the pH to acidic, and then add 2g of polyether Amine, kept stirring for 0.5 hours, then automatically cooled, suction filtered, washed, dried, and the resulting white powder was a water-resistant core-shell flame retardant.

[0028] (2) Preparation of polyurethane composite material:

[0029] Take the water-resistant core-shell structure flame retardant prepared in 3.2 quality step (1), add 3 parts by mass of n-pentane, place it in an ice-water bath, and the flame retardant is infiltrated by n-pentane; then add 10 parts by mass of polyether multi-component Alcohol, 0.12 parts by mass of catalyst, stirred evenly, and made into material A; take 10 parts by mass of diphenylmethane diisocyanate (M...

Embodiment 2

[0031] (1) Preparation of water-resistant core-shell structure flame retardant:

[0032] Add ammonium polyphosphate (APP) powder to 120mL of absolute ethanol at room temperature, stir and heat up to 50°C, add 15g of melamine-formaldehyde prepolymer, raise the temperature to 70°C, adjust the pH to be acidic, and then add 2g of polyether Amine, keep stirring for 2 hours; then automatic cooling, suction filtration, washing, drying, the obtained white powder is the water-resistant core-shell structure flame retardant.

[0033] (2) Preparation of polyurethane composite material:

[0034] Take the water-resistant core-shell structure flame retardant prepared in 3.2 quality step (1), add 3 parts by mass of n-pentane, place it in an ice-water bath, and the flame retardant is infiltrated by n-pentane; then add 10 parts by mass of polyether multi-component Alcohol, 0.12 parts by mass of catalyst, stirred evenly, and made into material A; take 10 parts by mass of diphenylmethane diisocy...

Embodiment 3

[0036] (1) Preparation of water-resistant core-shell structure flame retardant:

[0037] Add ammonium polyphosphate (APP) powder to 150mL of absolute ethanol at room temperature, stir and heat up to 60°C, add 15g of melamine-formaldehyde prepolymer, raise the temperature to 80°C, adjust the pH to be acidic, and then add 2g of polyether Amine, keep stirring for 4 hours; then automatic cooling, suction filtration, washing, drying, the obtained white powder is the water-resistant core-shell structure flame retardant.

[0038] (2) Preparation of polyurethane composite material:

[0039] Take the water-resistant core-shell structure flame retardant prepared in 3.2 quality step (1), add 3 parts by mass of n-pentane, place it in an ice-water bath, and the flame retardant is infiltrated by n-pentane; then add 10 parts by mass of polyether multi-component Alcohol, 0.12 parts by mass of catalyst, stirred evenly, and made into material A; take 10 parts by mass of diphenylmethane diisocy...

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Abstract

The invention belongs to the field of materials and discloses a waterproof core-shell structure flame retardant and application of the flame retardant to preparation of a polyurethane composite. The flame retardant forms a core-shell structure by taking ammonium polyphosphate as a capsule core and taking a copolymer of melamine formaldehyde prepolymer and multiamino polyether as a capsule wall material. Since a shell of the system is hydrophobic resin, water resistance is highly improved as compared with that uncoated flame retardant particles, loss rate of ammonium polyphosphate particles sealed with filter paper reaches 98.0%, loss rate of the prepared waterproof flame retardant particles under the same conditions is lower than 8.50%, and the polyurethane composite prepared from the waterproof core-shell structure flame retardant has good flame retardant effect and can still keep efficient flame retardance under the condition of long-time water soaking.

Description

technical field [0001] The invention belongs to the field of flame retardant materials, and in particular relates to a water-resistant core-shell structure flame retardant and its application in preparing polyurethane composite materials. Background technique [0002] With the development of modern technology, polymer materials are more and more widely used in modern life. Due to their excellent performance, polyurethane materials are widely used in the fields of transportation and building insulation materials. However, polyurethane materials are easy to burn, which has brought great potential accidents to the current society. Therefore, polyurethane flame retardant technology is becoming more and more important. In the past few decades, flame retardant technology has developed rapidly. It has experienced the development process from halogen-based flame retardant to halogen-free flame retardant. The flame retardant system has been continuously enriched and improved. Among ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G12/40C08G18/76C08G18/48C08G18/54C08J9/14
Inventor 吴昆罗富彬王莹沈璐吕满庚
Owner 国科广化(南雄)新材料研究院有限公司
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