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Flame-retardant polyurea and synthesis method thereof

A synthetic method, flame-retardant technology, applied in the direction of polyurea/polyurethane adhesive, polyurea/polyurethane coating, adhesive type, etc., to achieve the effect of expanding application, simple and feasible synthesis method, excellent flame-retardant type

Active Publication Date: 2020-06-30
SHENZHEN FEIYANG JUNYAN TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, there is no research on the flame retardant properties of aspartame polyurea resin

Method used

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  • Flame-retardant polyurea and synthesis method thereof
  • Flame-retardant polyurea and synthesis method thereof
  • Flame-retardant polyurea and synthesis method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The flame retardant polyurea provided by the embodiment of the present invention has the following structure:

[0037]

[0038] The synthesis method is as follows:

[0039] first step:

[0040] Weigh 1-methyl-2,4-cyclohexanediamine (2.56g, 0.02mol), phenylphosphonic dichloride (1.95g, 0.01mol), 1.5% 1-methyl-2 , 4-Cyclohexanediamine mass of AlCl 3 (0.03 grams);

[0041] Under an inert gas atmosphere, add a dropping funnel, a stirrer, anhydrous CaCl 2 Add 1-methyl-2,4-cyclohexanediamine, 3mL triethylamine and 20mL tetrahydrofuran into the condensing reflux device of the protective tube, and cool to 0°C in an ice-water bath; then add AlCl 3 , Dissolve phenylphosphonic dichloride in 10 mL of tetrahydrofuran, add dropwise within 1 hour, and react at 30°C for 24 hours to obtain phosphoramide.

[0042] Step two:

[0043] Under an inert gas atmosphere, the phosphonamide synthesized above was added to an excess of diethyl maleate (five equivalents), and the temperature...

Embodiment 2

[0045] The flame retardant polyurea provided by the embodiment of the present invention has the following structure:

[0046]

[0047] The difference between the preparation method of this example and Example 1 is that phenylphosphonic dichloride (1.95 g, 0.01 mol) is replaced by p-methoxyphenyl phosphonic dichloride (2.24 g, 0.01 mol).

Embodiment 3

[0049] The flame retardant polyurea provided by the embodiment of the present invention has the following structure:

[0050]

[0051] The difference between the preparation method of this example and Example 1 is that phenylphosphonic dichloride (1.95 g, 0.01 mol) is replaced by phenyl phosphonic dibromide (2.82 g, 0.01 mol).

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Abstract

The invention discloses flame-retardant polyurea and a synthesis method thereof, and relates to the technical field of polyurea materials. According to the flame-retardant polyurea provided by the invention, phosphoryl groups are introduced into a molecular structure, and the aspartic polyurea resin with flame retardance is constructed on the basis of original performance. Experiments prove that compared with traditional aspartic polyurea resin, the flame-retardant polyurea provided by the invention has more excellent flame retardancy, can be matched with the traditional aspartic polyurea resin together to prepare a coating, gives consideration to the mechanical properties of the traditional aspartic polyurea resin, enhances the excellent flame retardancy, greatly widens the application ofthe polyurea resin, and has market value.

Description

technical field [0001] The invention relates to the technical field of polyurea materials, in particular to a flame-retardant polyurea and a synthesis method thereof. Background technique [0002] Polyaspartate is a new type of hindered amine developed in recent years. The curing reaction of polyaspartate with polyisocyanate can form polyurea resin. Polyaspartate derivatives with different reaction speeds and different physical properties can be obtained by reacting and curing polyaspartic acid esters with polyisocyanates. The coating films of their derivatives have excellent yellowing resistance, UV aging resistance and wear resistance. performance, so it is widely used in coatings, waterproofing, adhesives, printed circuit boards, electronic packaging materials, composite materials, heavy machinery, reservoir dams and automobiles. But the limiting oxygen index (LOI) of aspartic polyurea resin is only about 18%, which is easy to cause fire, which makes it limited in many ...

Claims

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Application Information

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IPC IPC(8): C08G71/02C09D175/02C09D5/18C09J175/02
CPCC08G71/02C09D175/02C09D5/18C09J175/02
Inventor 熊东路易松杨轩徐涛龙绪俭肖增钧李斌仁鲁晓东
Owner SHENZHEN FEIYANG JUNYAN TECH DEV
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