Microencapsulated flame retardant and preparation method thereof

A technology of microencapsulation and flame retardants, which is applied in the field of microencapsulation flame retardants and its preparation, can solve problems such as poor water resistance, limited application range, poor compatibility between flame retardants and polymer materials, and reduce Side reactions, simple and fast process, and the effect of improving the efficiency of microencapsulation

Pending Publication Date: 2022-02-15
NANJING UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the defects of poor compatibility between flame retardants and polymer materials, poor water resistance, high cost, cumbersome process, and easy production of toxic substances in the prior art, the invention provides a polyurea microencapsulated flame retardant and its preparation method, by microencapsulating and modifying ordinary quality flame retardant raw materials, using the flame retardant as the core material and polyurea polymer material as the wall material, the polyurea microencapsulated flame retardant with excellent performance is prepared. Flame retardant, which solves the problem of poor compatibility between flame retardants and polymer materials and poor water resistance, which limit their application range

Method used

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  • Microencapsulated flame retardant and preparation method thereof
  • Microencapsulated flame retardant and preparation method thereof
  • Microencapsulated flame retardant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Preparation method of polyurea microcapsule phosphate (AHP), by the following steps:

[0027] (1) Pre-treatment of AHP: Take a certain amount of AHP (its SEM image is like figure 1 A shown in the four flask, then deionized water, divinisin, emulsifier Tween 80 sequentially added in the four flasks, and the amount of Tween 80 and the divinisinis is AHP quality, respectively. 6% and 1.3%, the mass ratio of deionized water and AHP was 3.5: 1, and the mixture was mixed even after the addition was completed, and the pretreatment of AHP was obtained.

[0028] (2) Preparation of oil-in-water emulsion: Press the ratio of deionized water and cyclohexane to 1: 4, and cyclohexane is added to the AHP pre-treatment solution obtained in step (1), and adjust the speed. It was 1200 rpm, stirred vigorously for about 20 min to give an AHP oil-in-water emulsion.

[0029] (3) Preparation of polyurea microcapsules AHP: Add a curing agent isoopretone diisocyanate (IPDI) in the oil-in-water emuls...

Embodiment 2

[0033] Preparation method of polyurea microcapsules AHP, achieved by the following steps:

[0034](1) Pre-treatment of AHP: Take a certain amount of AHP in four flasks, then subsequently adding deionized water, divinisin, emulsifier Tween 80 in four flasks, including Tween 80 and Diethylene The amount of triamine is 7% and 1.3% of aluminum phosphate, the mass ratio of deionized water and AHP is 3.5: 1, and the mixture is mixed even after the addition is completed, and the pre-treatment liquid of AHP is obtained.

[0035] (2) Preparation of oil-in-water emulsion: Press the ratio of deionized water and cyclohexane to 1: 4, and cyclohexane is added to the AHP pre-treatment solution obtained in step (1), and adjust the speed. It was 1200 rpm, stirred vigorously for about 20 min to give oil-in-water emulsion.

[0036] (3) Preparation of polyurea microcapsule AHP: The cyclohexane solution of the curing agent IPDI is added to the oil-in-water emulsion prepared in the step (2), and the am...

Embodiment 3

[0039] Preparation method of polyurea microcapsules AHP, achieved by the following steps:

[0040] (1) Pre-treatment of AHP: Take a certain amount of AHP in four flasks, then subsequently adding deionized water, divinisin, emulsifier Tween 80 in four flasks, including Tween 80 and Diethylene The amount of triamine is 4% and 2% of the secondary phosphate mass, the mass ratio of deionized water and AHP is 3.5: 1, and the mixture is mixed even after the addition is completed, and the pre-treatment liquid of AHP is obtained.

[0041] (2) Preparation of oil-in-water emulsion: Press the ratio of deionized water and cyclohexane to 1: 4, and cyclohexane is added to the AHP pre-treatment solution obtained in step (1), and adjust the speed. It was 1200 rpm, stirred vigorously for about 20 min to give oil-in-water emulsion.

[0042] (3) Preparation of polyurea microcapsules AHP: The cyclohexane solution of the curing agent IPDI is added to the oil-in-water emulsion prepared in the step (2), ...

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Abstract

The invention discloses a microencapsulated flame retardant and a preparation method thereof. The invention aims at the defects of poor compatibility and poor water resistance of a flame retardant and a high polymer material, the method adopts an interfacial polymerization method, the flame retardant, an amine compound and an emulsifier are dissolved in deionized water to form a water phase, then an organic solvent is added into the water phase and dispersed at a high speed to form a water-in-oil emulsion; after the emulsion is stable, a curing agent isocyanate is added; and polymerization reaction is carried out on the isocyanate and the amine compound aggregated on the surface of the flame retardant to form the polyurea microencapsulated flame retardant. Compared with a flame retardant which is not subjected to microencapsulation treatment, the flame retardant subjected to microencapsulation modification of the polyurea has the advantages that the water resistance and the compatibility with macromolecules are effectively improved, the flame retardant property of the material is greatly improved, and the damage of the flame retardant to the mechanical property of the material is reduced.

Description

Technical field [0001] The present invention relates to a microcapsule flame retardant and a preparation method thereof, belonging to the field of flame retardant modification. Background technique [0002] The phosphorus nitrogen-based flame retardant is prepared as a environmentally friendly flame retardant, which is commonly used for the flame retardant reform of polymer materials due to its use of non-toxic halogen, good thermal stability and excellent flame retardancy. Sex, such as PA, PU, ​​ABS, PBT, etc., but the phosphorus nitrogen-based flame retardant also has a certain defect, such as poor compatibility with high molecular weight, poor water resistance, etc., which limits its in the field of flame retardant. For extensive use. In addition to the phosphorus nitrogen flame retardant, there are also some flame retardants, such as boron flame retardants, zinc flame retardants, etc., these flame retardants have excellent flame retardant properties, but they have easy moistu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K9/10C08K3/32C08L23/06B01J13/16
CPCC08K9/10C08K3/32C08L23/06B01J13/16C08L2201/02C08L2207/066C08K2003/323
Inventor 周伟良高明肖乐勤吴战武左海丽
Owner NANJING UNIV OF SCI & TECH
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