Method for preparing polyether amine modified isocyanate group polyimide foam

A technology of ester-based polyimide and polyetheramine, which is applied in the field of new polymer foam materials, can solve the problems of high manufacturing cost and complicated process, and achieve the effect of low manufacturing cost, simple preparation process and uniform cells

Active Publication Date: 2012-08-01
QINGDAO ADVANCED MARINE MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The process is complicated and

Method used

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  • Method for preparing polyether amine modified isocyanate group polyimide foam
  • Method for preparing polyether amine modified isocyanate group polyimide foam

Examples

Experimental program
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Example Embodiment

[0034] Example 2

[0035] Put in 80 grams of 1,2,4,5 pyromellitic dianhydride (PMDA) and 140 grams of dimethylformamide into a 500ml three-necked flask equipped with a stirrer, thermometer and reflux condenser, stir well and slowly warm up When the temperature reaches 90-100°C, wait until the 1,2,4,5 pyromellitic dianhydride solid particles are completely dissolved, and when the solution becomes clear, drop the temperature to 65°C and add 10 grams of anhydrous methanol to the esterification reaction. Clear and transparent, cool to below 60°C, add 1.5 g of isoquinoline, 15 g of polytetrahydrofuran ether diamine (P-1000). Stir the above solution to a constant temperature to obtain a brown-red transparent viscous precursor solution.

[0036] Weigh 20 grams of the aforementioned precursor solution, add 1.5 grams of silicone foam stabilizer, 2.5 grams of deionized water, 0.5 grams of triethylene diamine, 0.2 grams of dibutyl tin dilaurate, and 0.1 grams of bis(dimethylaminoethyl) ether...

Example Embodiment

[0041] Example 3

[0042] Put 70 grams of 3,3',4,4' benzophenone tetracarboxylic dianhydride (BTDA) and 110 grams of dimethylformamide into a 500ml three-necked flask equipped with a stirrer, thermometer and reflux condenser. Slowly stir and raise the temperature to 100-110°C. When the solid particles of 3,3',4,4' benzophenone tetracarboxylic dianhydride (BTDA) are all dissolved and the solution becomes clear, cool down to 65°C and add 18 grams of anhydrous Methanol is used for esterification reaction. When the solution is clear and transparent, the temperature is lowered to below 60°C. Add 1.5 g of isoquinoline and 15 g of polyoxypropylene triamine (T-403). The above solution was stirred to a constant temperature to prepare a light yellow transparent viscous precursor solution.

[0043] Weigh 20 grams of the above precursor solution, add 1.5 grams of silicone foam stabilizer, 3 grams of deionized water, 0.5 grams of triethylene diamine, 0.2 grams of dibutyl tin dilaurate, and 0....

Example Embodiment

[0048] Example 4

[0049] Put 80 grams of 3,3',4,4'biphenyltetracarboxylic dianhydride (BPDA) and 210 grams of dimethylformamide into a 500ml three-necked flask equipped with a stirrer, thermometer and reflux condenser, and stir thoroughly Slowly increase the temperature to 100-110°C, add 12 grams of 4.4' diaminodiphenyl ether (4,4'-ODA), continue to heat up to 130°C, make 3,3',4,4'biphenyltetracarboxylic acid The anhydride and 4,4'diaminodiphenyl ether solid particles are all dissolved, and when the solution becomes clear, the temperature is lowered to 65°C and 24 grams of anhydrous methanol are put into the esterification reaction. When the solution is clear and transparent, the temperature is lowered to below 60°C. Add 1.5 g of isoquinoline and 15 g of polyoxypropylene triamine (T-5000). Stir the above solution to a constant temperature to obtain a purple-red transparent viscous precursor solution.

[0050] Weigh 20 grams of the above precursor solution, add 1.5 grams of silic...

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Abstract

The invention relates to a method for preparing polyether amine modified isocyanate group polyimide foam. Preparation equipment and chemical raw materials are used for preparing the foam, foam precursor solution of the prepared foam is stable in storage, the foam is provided with uniform holes and has flexibility, and rigidity and brittleness are reduced. The method is simple in preparation technology, low in preparation cost, easy in industrial production and convenient in popularization and application.

Description

Technical field [0001] The invention relates to the field of a new type of polymer foam material, in particular to a method for preparing a polyetheramine modified isocyanate-based polyimide foam. Background technique [0002] The research on polyimide foam materials began in 1966. The DuPont company of the United States first applied for a patent USP3,249,561, which was to add a dehydrating agent or a tertiary amine compound and a gas-generating acid to the polyamic acid solution to generate carbon monoxide or Carbon dioxide is used as a foaming agent to prepare foam intermediates, which are cured to obtain polyimide foam materials. The foam produced by this method has uneven cells. The USP 6,172,127 patent is to prepare diacid diester fatty alcohol solution by aromatic dianhydride in low molecular fatty alcohol. This solution is reacted with aromatic amine to prepare polyimide acid precursor solution, and the solvent is evaporated to form polyimide Acid precursor powder. The...

Claims

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Application Information

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IPC IPC(8): C08L79/08C08G73/10C08J9/12C08J9/14C08J9/08
Inventor 刘连河孙谦张树华韩世辉莫立新叶明黄加强魏浩孙高辉马明明郑志红
Owner QINGDAO ADVANCED MARINE MATERIAL TECH
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