Preparation method of microencapsulated zirconium phosphate and halogen-free flame-retardant PC (polycarbonate) comprising microencapsulated zirconium phosphate

Abstract

The invention discloses a preparation method of microencapsulated zirconium phosphate. The method comprises steps as follows: zirconium phosphate with the particle size being 0.8-1.2 mu m is evenly dispersed in a solvent, and a zirconium phosphate dispersion liquid is obtained; meanwhile, a reaction reagent is added to the zirconium phosphate dispersion liquid, the mixture is mechanically stirred and subjected to reflux at the temperature of 50-180 DEG C, a hybrid crosslinking reaction occurs, the reaction time is controlled within 1-36 h, and after the reaction ends, microencapsulated zirconium phosphate is obtained through washing and freeze-drying. The microencapsulated zirconium phosphate is prepared from zirconium phosphate with a microencapsulation technology, and the preparation technology is simple, easy to operate and suitable for industrial production; a prepared microencapsulated zirconium phosphate flame retardant has the more optimized and reasonable flame-retardant progress control and the more effective and lasting flame-retardant effect; prepared microencapsulated zirconium phosphate is added to a PC matrix, and the prepared halogen-free flame-retardant PC is easy to process and mold, halogen-free, environment-friendly and better balanced in mechanical performance and flame-retardant performance.

Description

technical field

[0001] The invention belongs to the field of flame-retardant engineering plastics, and in particular relates to a preparation method of microencapsulated zirconium phosphate and a halogen-free flame-retardant PC composed of the same. Background technique

[0002] As one of the general engineering materials, polycarbonate (PC) is widely used in the fields of electronics and electronics, vehicle engineering, optics and other industrial and living fields because of its many excellent essential properties, and its importance is becoming increasingly prominent. Moreover, polycarbonate is a thermoplastic amorphous polymer material, which has good impact performance and bending strength, as well as high visible light transmittance. Moreover, polycarbonate, as a structural material, can withstand mechanical stress, but also has the performance of being able to be used in a wide temperature range and in a relatively complex environment, and has excellent electrical pr...

Examples

Embodiment 1

[0044] Uniformly disperse zirconium phosphate with a particle size of 1.0 μm and a mass of 15 g in tetrahydrofuran solvent to obtain a zirconium phosphate dispersion; at the same time, the reaction reagents (phosphazene, 4,4'-biphenylmethylene diisocyanate, ethyl The molar ratio of diamine is 1:2:4) added to the above zirconium phosphate dispersion, and the ratio of the added reaction reagent to the molar number of zirconium phosphate is controlled to be 0.2:1, and the reaction temperature is raised to 120°C, mechanically stirred And reflux, the stirring rate is controlled at 200rpm, and the reaction time is controlled at 24h. After the reaction is completed, it is washed alternately with acetone and deionized water for 2~3 times, and then freeze-dried at -40°C for 24h to obtain microencapsulation. Zirconium phosphate.

[0045] A halogen-free flame-retardant PC containing microencapsulated zirconium phosphate prepared by the above method for preparing microencapsulated zirconi...

Embodiment 2

[0048] Uniformly disperse zirconium phosphate with a particle size of 1.0 μm and a mass of 15 g in tetrahydrofuran solvent to obtain a zirconium phosphate dispersion; at the same time, the reaction reagents (phosphazene, 4,4'-biphenylmethylene diisocyanate, ethyl The molar ratio of diamine is 1:2:4) added to the above zirconium phosphate dispersion, and the ratio of the added reaction reagent to the molar number of zirconium phosphate is controlled to be 0.7:1, and the reaction temperature is raised to 120°C, mechanically stirred And reflux, the stirring rate is controlled at 200rpm, and the reaction time is controlled at 24h. After the reaction is completed, it is washed alternately with acetone and deionized water for 2~3 times, and then freeze-dried at -40°C for 24h to obtain microencapsulation. Zirconium phosphate.

[0049] A halogen-free flame-retardant PC containing microencapsulated zirconium phosphate prepared by the above method for preparing microencapsulated zirconi...

Embodiment 3

[0052] Uniformly disperse zirconium phosphate with a particle size of 1.0 μm and a mass of 15 g in tetrahydrofuran solvent to obtain a zirconium phosphate dispersion; at the same time, the reaction reagents (phosphazene, 4,4'-biphenylmethylene diisocyanate, ethyl The molar ratio of diamine is 1:2:4) into the above zirconium phosphate dispersion, and control the ratio of the added reaction reagent to the molar number of zirconium phosphate to be 1:1, raise the reaction temperature to 120°C, and mechanically stir And reflux, the stirring rate is controlled at 200rpm, and the reaction time is controlled at 24h. After the reaction is completed, it is washed alternately with acetone and deionized water for 2~3 times, and then freeze-dried at -40°C for 24h to obtain microencapsulation. Zirconium phosphate.

[0053] A halogen-free flame-retardant PC containing microencapsulated zirconium phosphate prepared by the above method for preparing microencapsulated zirconium phosphate, in pa...

technical field

[0001] The invention belongs to the field of flame-retardant engineering plastics, and in particular relates to a preparation method of microencapsulated zirconium phosphate and a halogen-free flame-retardant PC composed of the same. Background technique

[0002] As one of the general engineering materials, polycarbonate (PC) is widely used in the fields of electronics and electronics, vehicle engineering, optics and other industrial and living fields because of its many excellent essential properties, and its importance is becoming increasingly prominent. Moreover, polycarbonate is a thermoplastic amorphous polymer material, which has good impact performance and bending strength, as well as high visible light transmittance. Moreover, polycarbonate, as a structural material, can withstand mechanical stress, but also has the performance of being able to be used in a wide temperature range and in a relatively complex environment, and has excellent electrical pr...

Examples

Embodiment 1

[0044] Uniformly disperse zirconium phosphate with a particle size of 1.0 μm and a mass of 15 g in tetrahydrofuran solvent to obtain a zirconium phosphate dispersion; at the same time, the reaction reagents (phosphazene, 4,4'-biphenylmethylene diisocyanate, ethyl The molar ratio of diamine is 1:2:4) added to the above zirconium phosphate dispersion, and the ratio of the added reaction reagent to the molar number of zirconium phosphate is controlled to be 0.2:1, and the reaction temperature is raised to 120°C, mechanically stirred And reflux, the stirring rate is controlled at 200rpm, and the reaction time is controlled at 24h. After the reaction is completed, it is washed alternately with acetone and deionized water for 2~3 times, and then freeze-dried at -40°C for 24h to obtain microencapsulation. Zirconium phosphate.

[0045] A halogen-free flame-retardant PC containing microencapsulated zirconium phosphate prepared by the above method for preparing microencapsulated zirconi...

Embodiment 2

[0048] Uniformly disperse zirconium phosphate with a particle size of 1.0 μm and a mass of 15 g in tetrahydrofuran solvent to obtain a zirconium phosphate dispersion; at the same time, the reaction reagents (phosphazene, 4,4'-biphenylmethylene diisocyanate, ethyl The molar ratio of diamine is 1:2:4) added to the above zirconium phosphate dispersion, and the ratio of the added reaction reagent to the molar number of zirconium phosphate is controlled to be 0.7:1, and the reaction temperature is raised to 120°C, mechanically stirred And reflux, the stirring rate is controlled at 200rpm, and the reaction time is controlled at 24h. After the reaction is completed, it is washed alternately with acetone and deionized water for 2~3 times, and then freeze-dried at -40°C for 24h to obtain microencapsulation. Zirconium phosphate.

[0049] A halogen-free flame-retardant PC containing microencapsulated zirconium phosphate prepared by the above method for preparing microencapsulated zirconi...

Embodiment 3

[0052] Uniformly disperse zirconium phosphate with a particle size of 1.0 μm and a mass of 15 g in tetrahydrofuran solvent to obtain a zirconium phosphate dispersion; at the same time, the reaction reagents (phosphazene, 4,4'-biphenylmethylene diisocyanate, ethyl The molar ratio of diamine is 1:2:4) into the above zirconium phosphate dispersion, and control the ratio of the added reaction reagent to the molar number of zirconium phosphate to be 1:1, raise the reaction temperature to 120°C, and mechanically stir And reflux, the stirring rate is controlled at 200rpm, and the reaction time is controlled at 24h. After the reaction is completed, it is washed alternately with acetone and deionized water for 2~3 times, and then freeze-dried at -40°C for 24h to obtain microencapsulation. Zirconium phosphate.

[0053] A halogen-free flame-retardant PC containing microencapsulated zirconium phosphate prepared by the above method for preparing microencapsulated zirconium phosphate, in pa...

Images