Polyimide modified polyisocyanurate foam and preparation method thereof

A polyisocyanurate and polyimide technology, which is applied in the field of foam plastics, can solve the problems of not involving polyimide precursors and the like, and achieves the effects of easy popularization and application, low smoke density and good dimensional stability

Active Publication Date: 2014-12-10
QINGDAO ADVANCED MARINE MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The above-mentioned patents related to modified polyisocyanurate foams do not involve the use of polyimide precursors as foamable components to prepare foam combination solutions and methods for preparing modified polyisocyanurate foams.

Method used

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  • Polyimide modified polyisocyanurate foam and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] In a 1000ml three-necked bottle equipped with a stirrer, a thermometer and a reflux condenser, drop 275 grams of 3,3 , ,4,4 , Benzophenone tetracarboxylic dianhydride (BTDA) and 500 grams of dimethylformamide, stir well and slowly raise the temperature to 100 ° C, wait for 3,3 , ,4,4 , When all the solid particles of benzophenone tetracarboxylic dianhydride (BTDA) are dissolved and the solution becomes clear, add 35 grams of 4,4 ， Diaminodiphenyl ether is reacted at 100-110°C to a clear orange-red solution, cooled to 65°C and put into 65 grams of anhydrous methanol for esterification reaction. After the solution is clear and transparent, cool down and discharge to produce a light yellow polyimide precursor solution.

Embodiment 2

[0032] Put 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 raise the temperature At 90-100°C, when the solid particles of 1,2,4,5 pyromellitic dianhydride are completely dissolved, add 5 grams of 4,4 ， Diaminodiphenyl ether (4,4 ， -ODA) was heated to 120 °C to react to a clear solution. The temperature was lowered to 65° C. and 12 grams of anhydrous methanol was added to carry out esterification reaction to a reddish-brown transparent solution to obtain a polyimide precursor solution.

Embodiment 3

[0034] Put 80 grams of 3 ， ,3,4 ， , 4 biphenyltetracarboxylic dianhydride (BPDA) and 210 grams of dimethylformamide, stir well and slowly heat up to 100-110 ° C, add 12 grams of 4.4 ， Diaminodiphenyl ether (4,4 ， -ODA), continue to heat up to 130°C, so that 3,3 ， ,4,4 ， Biphenyltetracarboxylic dianhydride and 4,4 ， All solid particles of diaminodiphenyl ether were dissolved, and when the solution became clear, the temperature was lowered to 65° C. and 24 grams of anhydrous methanol was added to carry out esterification reaction. When the solution was clear and transparent, a bordeaux polyimide precursor solution was obtained.

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Abstract

The invention discloses a polyimide modified polyisocyanurate foam material and a preparation method thereof. A polyimide precursor prepared by esterification reaction of aromatic dianhydride and aromatic diamine with fatty alcohol is compounded with polyester polyol, polyether polyol, a surfactant, a foaming agent, a catalyst, and the like to form a foam combination solution, the solution chemically reacts with polyisocyanate to foam, and then the polyimide modified polyisocyanurate foam is endued with properties such as high-temperature resistance and flame retardance. The modified polyisocyanurate foam material comprises (1) the foamable polyimide precursor, (2) benzoic anhydride polyester and sucrose polyether polyol, (3) a polyisocyanate curing agent, and (4) an organosilicon foam stabilizer, the organic fluorinated surfactant, the trimerization catalyst and the foaming agent. According to the foam material and the preparation method, a one-step foaming technology is adopted, and the technology is simple and convenient and low in cost; and the foam is temperature-resistant, flame-retardant and low in smoke density, so that the popularization and application are facilitated.

Description

technical field [0001] The invention belongs to the field of foam plastics, and in particular relates to a polyimide-modified polyisocyanurate foam and a preparation method thereof. Background technique [0002] Polyisocyanurate foam is made by isocyanate trimerization reaction, has good temperature resistance, low smoke emission when burning, and can be used continuously at 150°C. However, pure polyisocyanurate foam is brittle and needs to be modified. Urethane, oxazolidinone, carbodiimide, amide and imide are usually introduced between the isocyanurate rings. Polyimide is high temperature resistant, non-combustible, and has a smoke density close to zero. Polyisocyanurate foam modified with polyimide, high temperature resistance, low smoke density, flame retardant, excellent resistance to flame penetration. [0003] U.S. Patents USP5627220A and USP8148440 report a method for preparing polyurethane-modified polyisocyanurate rigid foams by reacting polyether polyols with p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/64C08G18/42C08G18/48C08G18/09C08G73/10C08J9/14C08G101/00
Inventor 刘连河张树华叶明陈爱志石勇胡松霞
Owner QINGDAO ADVANCED MARINE MATERIAL TECH
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