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Alkaloid phosphate flame retardant and preparation method thereof

A technology of alkaloid phosphate and flame retardant, which is applied in the field of polymer materials to achieve the effect of improving flame retardant efficiency and high flame retardant efficiency

Active Publication Date: 2019-03-01
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are many alkaloids in nature. They have good thermal stability, can form salts with phosphoric acid, and have certain catalytic effects. They are expected to form new flame retardants with catalytic flame retardancy. Related research has not yet been published.

Method used

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  • Alkaloid phosphate flame retardant and preparation method thereof
  • Alkaloid phosphate flame retardant and preparation method thereof
  • Alkaloid phosphate flame retardant and preparation method thereof

Examples

Experimental program
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Effect test

example 1-1

[0039] Into a 100 mL three-necked round bottom flask equipped with a spherical condenser, magnetic heating and stirring, a thermometer and a dropping funnel, add ethanol (30 mL, water removed), and cytosine (2.22 g, 0.02 mol). Stir and warm to 60°C under nitrogen. Weigh pyrophosphoric acid (1.78g, 0.01mol) into a beaker, add ethanol (20mL, water removed) and stir until completely dissolved, then slowly drop it into a three-neck flask through a dropping funnel and stir for 6h. The reaction solution was cooled at room temperature, washed three times with absolute ethanol, filtered and vacuum-dried to obtain 3.84g white solid product 1 (yield rate:

[0040] Y%=96.0%), the product structure is shown in formula 1. figure 1 It is the infrared spectrogram of embodiment 1-1 product. figure 2 It is the thermogravimetric curve of the product of Example 1-1.

[0041]

example 1-2

[0043] Into a 500 mL three-necked round bottom flask equipped with a spherical condenser, magnetic heating and stirring, a thermometer and a dropping funnel, add methanol (200 mL, water removed), and cytosine (22.22 g, 0.20 mol). Stir and warm to 60°C under nitrogen. Weigh pyrophosphoric acid (8.90 g, 0.05 mol) into a beaker, add methanol (50 mL, water removed) and stir until completely dissolved, then slowly drop it into a three-necked flask through a dropping funnel and stir for 4 h. The reaction solution was cooled at room temperature, washed three times with absolute ethanol, filtered and vacuum-dried to obtain 29.56 g of white solid product 2 (yield: Y%=95.0%), the product structure is shown in formula 2.

[0044]

example 1-3

[0046] In a 250 mL three-neck round bottom flask equipped with a spherical condenser, magnetic heating and stirring, a thermometer and a dropping funnel, add acetonitrile (100 mL, water removed), and uracil (11.2 g, 0.1 mol). Stir and warm to 90°C under nitrogen. Weigh pyrophosphoric acid (8.90 g, 0.05 mol) into a beaker, add acetonitrile (20 mL, water removed) and stir until completely dissolved, then slowly drop it into a three-neck flask through a dropping funnel and stir for 8 h. The reaction solution was cooled at room temperature, washed three times with absolute ethanol, filtered and vacuum-dried to obtain 18.24 g of white solid product 3 (yield: Y%=90.7%), the product structure is shown in formula 3. image 3 Be the infrared spectrogram of embodiment 1-3 product; Figure 4 It is the thermogravimetric curve of embodiment 1-3 product.

[0047]

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Abstract

The invention discloses an alkaloid phosphate flame retardant and a preparation method thereof. Alkaloid phosphate is formed from alkaloid monomer X and phosphoric acid monomers Y through reaction, and is subjected to surface coating modification treatment by epoxy resin or polyurethane, and the alkaloid phosphate flame retardant is obtained. Water resistance and compatibility of the flame retardant with polymers are improved. The alkaloid monomer X is one or more of cytosine (C), uracil (U), adenine (A), guanine (G) and thymine (T). The phosphoric acid monomers Y are pyrophosphoric acid, perphosphoric acid, polyphosphoric acid, phenylphosphonic acid and phytic acid. A series of phosphorus-containing base salts are prepared from bases of bio-based compounds as a raw material, and the phosphorus-containing base salts can be used as a flame retardant additive and have higher flame retardant efficiency. Therefore, a feasible embodiment is provided for improving the flame retardant efficiency of the bio-based flame retardant additive.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to an alkaloid phosphate flame retardant and a preparation method thereof. Background technique [0002] With the development of polymer materials, polyolefin materials have been widely used in daily life and industrial fields. However, due to its own structural reasons, it has flammable characteristics, which also brings potential safety hazards to people. In order to reduce the safety hazards caused by the flammability of polyolefin materials, it is necessary to carry out flame retardant modification. [0003] Traditional flame retardants include halogenated flame retardants and halogen-free flame retardants. Halogenated flame retardants have a good flame retardant effect and a small amount of addition, but there are disadvantages such as large smoke generation and release of more toxic substances. Halogen-free flame retardants can well avoid the toxic sub...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K9/10C08K5/3462C08K5/3432
CPCC08K5/3432C08K5/3462C08K9/10
Inventor 李娟于国星
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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