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Flame-retardant polyurea for new energy automobile and preparation method of flame-retardant polyurea

A polyurea, phosphorus source technology, applied in the field of flame retardant materials, can solve the problems of influence, low flame retardant efficiency of lanthanum hydroxide, unfavorable mechanical properties of the matrix, etc., and achieves the effect of reducing the number of additions, shortening the processing time, and improving the mechanical properties.

Pending Publication Date: 2022-06-24
QINGDAO AIR NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, lanthanum hydroxide is the most widely used, but the flame retardant efficiency of lanthanum hydroxide is low, and when added in large amounts, it will have an adverse effect on the mechanical properties of the matrix

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0030] The invention provides a method for preparing phosphorus-silicon-lanthanum-zinc-aluminum hydrotalcite with a sandwich structure, comprising the following steps:

[0031] Dispersing the silane coupling agent and the ZnAlLa-like hydrotalcite in an organic solvent, and refluxing to obtain a ZnAlLa-like hydrotalcite-like coupling dispersion;

[0032] Adding a phosphorus source to the ZnAlLa-like hydrotalcite-like coupling dispersion liquid, heat preservation reaction, and obtain phosphorus-silicon-lanthanum-zinc-aluminum-like hydrotalcite, and the phosphorus-silicon-lanthanum-zinc-aluminum-like hydrotalcite has a sandwich structure , comprising three main plies and an intermediate layer between any two main plies and a silane coupling agent located on the periphery of the main ply and the intermediate layer, the three main plies are respectively a lanthanum ion layer, a zinc An ion layer and an aluminum ion layer, the intermediate layer includes hydroxide and phosphorus-con...

Embodiment 1

[0090] 10 parts of zinc nitrate and 5 parts of aluminum nitrate are placed in a three-necked flask of 100 parts of deionized water to prepare a mixed salt solution;

[0091] Adjust the pH value of the mixed salt solution to 7.0, and put it in a frequency-converted microwave to react at 100°C for 5 hours to obtain double-layered NO 3 -ZnAlLDHs;

[0092] NO 3 -Add 30 parts of lanthanum nitrate to the ZnAlLDHs, adjust the pH value of the solution to 7.0, put it in a frequency conversion microwave to react at 100°C for 5h, filter, and dry the filter cake at 50°C under normal pressure for 24h to obtain NO 3 -ZnAlLa LDHs solid.

[0093] Take 5 parts of (3-aminopropyl) triethoxysilane and the above 20 parts of NO 3 -ZnAlLa LDHs solid was placed in a three-necked flask with 50 parts of toluene, N 2 Under protection, stir and reflux at 110°C for 5 hours, then add 5 parts of phosphotungstic acid dropwise, and continue the reaction at 110°C for 2 hours. After the reaction is complete...

Embodiment 2

[0096] Stir and heat 100 parts of PTMEG1000 to 95°C, add 10 parts of phosphorus-silicon-lanthanum-zinc-aluminum hydrotalcite prepared in Example 1 under vacuum -0.1MPa, dehydrate for 5 hours, remove the vacuum, cool down to below 50°C, and then Add MDI-50, react at 90°C for 3h, measure -NCO value of 16%, and discharge to obtain component A.

[0097] Put 30 parts of amino-terminated polyether D2000, 20 parts of PTMEG1000, 2 parts of silane coupling agent A171, 35 parts of chain extender E100, 0.1 part of catalyst bismuth isooctanoate, 5 parts of 3A molecular sieve and 1 part of color paste into the high-speed dispersion machine storage In the material tank, stir at room temperature for 15-30 minutes, then grind it with a sand mill until the fineness is qualified, and then filter and pack it with a 200-mesh copper filter to obtain component B.

[0098] Mix component A and component B with a volume ratio of 1:1, and spray it on the surface of the steel plate through a spraying ma...

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Abstract

The invention provides flame-retardant polyurea for a new energy automobile, which is characterized in that phosphorus-silicon-lanthanum-zinc-aluminum hydrotalcite is used as a flame retardant, and the phosphorus-silicon-lanthanum-zinc-aluminum hydrotalcite has a sandwich structure; comprising a lanthanum ion layer, a zinc ion layer and an aluminum ion layer, and the middle layer comprises hydroxyl and phosphorus-containing negative ions. Five elements in the phosphorus-silicon-lanthanum-zinc-aluminum hydrotalcite have a synergistic effect, so that a good flame-retardant effect is achieved, the dosage of the required flame retardant is greatly reduced, and the flame-retardant property and flame-retardant efficiency of the polyurea are improved.

Description

technical field [0001] The invention relates to the technical field of flame retardant materials, in particular to a flame retardant polyurea for new energy vehicles and a preparation method thereof. Background technique [0002] As traditionally powered passenger cars become increasingly electronic, larger batteries are required to run on-board systems, making it more difficult to protect batteries in the event of a severe crash. While the structure around the battery is already strong enough to provide adequate protection in a normal crash, in a severe crash, the protective structure, such as the battery compartment, can deform and potentially puncture the battery, rendering it inoperable. In serious cases, it will also cause a short circuit of the battery, causing a fire and threatening the safety of drivers and passengers. In this case, additional protection of the battery case housing is required. [0003] Spray polyurea elastomer, as a polymer material with high stre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D5/18C09D175/02C09D175/08C08K9/06C08K3/26C08K9/02
CPCC09D5/18C09D175/02C09D175/08C08K9/06C08K3/26C08K9/02C08L2201/02
Inventor 王宝柱苏坤战路路郭磊王桂刚
Owner QINGDAO AIR NEW MATERIALS
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