Microencapsulated aluminium hypophosphite and preparation method therefor and application thereof

A technology of aluminum hypophosphite and microencapsulation, which is applied in the field of materials, can solve the problems of poor compatibility between aluminum hypophosphite and polyurethane rigid foam, and achieve the effects of low production cost, continuous preparation process and good compatibility

Active Publication Date: 2015-11-11
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

[0004] In order to overcome the shortcomings and deficiencies of poor compatibility between aluminum hypophosphite and polyurethane rigid foam in the prior art, the primary purpose of the present invention is to provide a preparation method of microencapsulated aluminum hypophosphite

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Take 15g (120mmol) of melamine with a molar ratio of 1:2 and 17.9mL of 37% formaldehyde solution (formaldehyde is 240mmol) into a three-necked flask, add 30g of distilled water, adjust the pH to 8-9, and stir to raise the temperature to 60°C. Stir at constant temperature for half an hour, add 60 g of aluminum hypophosphite into a three-necked flask, add 120 g of absolute ethanol, adjust the pH to 2-3, and stir at 60° C. for 2 hours to obtain a suspension. Suction filter the resulting suspension, wash and dry to obtain a white powder which is microencapsulated aluminum hypophosphite.

[0035] (2) Mix the microencapsulated aluminum hypophosphite prepared by 2g step (1) and 1.2g of n-pentane, add 10g of polyether polyol (purchased from Guangzhou UBS Trading Co., Ltd., model is Polyether 4110) and 0.03g of dibutyltin dilaurate, stir evenly, and make material A; take 10g of diphenylmethane diisocyanate (MDI), liquefy at 50°C to obtain material B; then add material A to ...

Embodiment 2

[0037] (1) Take 10g (79mmol) of melamine with a molar ratio of 1:3 and 17.9mL of 37% formaldehyde solution (formaldehyde is 240mmol) into a three-necked flask, add 40g of distilled water, adjust the pH to 8-9, stir and heat up to 70°C. Stir at constant temperature for 60 minutes, take 70g of aluminum hypophosphite into a three-necked flask, add 140g of absolute ethanol, and adjust the pH to 2-3. Then 3 g of polyetheramine (D230) was added. Stir at constant temperature at 70°C for 3 hours to obtain a suspension. Suction filter the resulting suspension, wash and dry to obtain a white powder which is microencapsulated aluminum hypophosphite.

[0038] (2) The microencapsulated aluminum hypophosphite prepared by 3g step (1) and the normal pentane of 1.2g are mixed, add the polyether polyol of 10g and the dibutyltin dilaurate of 0.03g in ice-water bath, stir, prepare Prepare material A; take 10g of diphenylmethane diisocyanate (MDI), liquefy at 60°C to obtain material B; then add...

Embodiment 3

[0040] (1) Take 10g (79mmol) of melamine with a molar ratio of 1:4 and 23.9mL of 37% formaldehyde solution (formaldehyde is 320mmol) into a three-necked flask, add 50g of distilled water, adjust the pH to 8-9, stir and heat up to 80°C. Stir at constant temperature for 80 minutes, take 70g of aluminum hypophosphite and put it into a three-necked flask, add 160g of absolute ethanol, and adjust the pH to 2-3. Then 5 g of polyetheramine (D230) was added. Stir at constant temperature at 60°C for 4 hours to obtain a suspension. Suction filter the resulting suspension, wash and dry to obtain a white powder which is microencapsulated aluminum hypophosphite.

[0041] (2) The microencapsulated aluminum hypophosphite prepared by 4g step (1) and the normal pentane of 1.3g are mixed, add the polyether polyol of 10g and the dibutyltin dilaurate of 0.05g in ice-water bath, stir, prepare Prepare material A; take 10g of diphenylmethane diisocyanate (MDI), liquefy at 80°C to obtain material ...

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Abstract

The invention discloses microencapsulated aluminium hypophosphite and a preparation method therefor and application thereof and belongs to the field of materials. The microencapsulated aluminium hypophosphite is synthesized through in situ polymerization by taking aluminium hypophosphite as a capsule core and melamino-formaldehyde resin and a derivative of the melamino-formaldehyde resin as a capsule material. The microencapsulated aluminium hypophosphite prepared by the preparation method disclosed by the invention is good in compatibility with polyurethane rigid foam, and the damage on the mechanical property is less while the flame retardance is improved. The preparation method disclosed by the invention is continuous in process, short in reaction time, low in production cost, high in production efficiency and easy to realize industrial production. By adding the microencapsulated aluminium hypophosphite through a one-step foaming method, the prepared high performance polyurethane rigid foam has high flame retardance and mechanical properties.

Description

technical field [0001] The invention belongs to the field of materials, in particular to a microencapsulated aluminum hypophosphite and a preparation method and application thereof. Background technique [0002] Polyurethane foam is widely used in building insulation and transportation industries due to its light weight and excellent thermal insulation properties. However, polyurethane rigid foam, due to its special foam pore structure and long carbon chain chemical composition, causes polyurethane rigid foam to be extremely easy to burn. The oxygen index of polyurethane rigid foam without adding any flame retardant is only 16-18%. . Polyurethane rigid foam can be found in a large number of fire accidents in recent years. At present, the method to improve the flame retardant performance of rigid polyurethane foam is to add flame retardants. Aluminum hypophosphite is a new type of flame retardant. Due to its good thermal stability, high phosphorus content, low water solubil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K9/10C08K3/32C08G12/40C08G18/48C08J9/14C08L75/08B01J13/02
Inventor 吴昆罗富彬吴土萍郭会龙吕满庚
Owner 国科广化(南雄)新材料研究院有限公司
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