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Thermostable benzoxazine resin compound and its preparation method and uses

A technology of resin compound and benzoxazine, which is applied in the field of heat-resistant benzoxazine resin compound and its preparation, can solve the problems of expensive monomer, limited application, and insignificant improvement of heat resistance, etc., and achieves Effects of increasing cross-linking density, improving heat resistance, and increasing carbon residue rate

Inactive Publication Date: 2006-12-27
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the application of this method is still limited due to the high price of monomers or the insignificant improvement of heat resistance.

Method used

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  • Thermostable benzoxazine resin compound and its preparation method and uses
  • Thermostable benzoxazine resin compound and its preparation method and uses
  • Thermostable benzoxazine resin compound and its preparation method and uses

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Embodiment 1 prepares terephthalaldehyde (TPA) / diamine type benzoxazine (B-BOZ) compound

[0044] Stir and mix 90g of diamine-type benzoxazine (B-BOZ) and 10g of terephthalaldehyde (TPA) at a temperature of about 90°C, and then vacuumize at a temperature of 130°C for 0.5 hours at a vacuum degree of 0.05-0.095MPa. 2 hours at 140°C, 3 hours at 150°C, 1 hour at 160°C, 1 hour at 170°C, 1 hour at 180°C, 1 hour at 190°C, 1 hour at 200°C, 1 hour at 220°C ℃ for 1 hour to obtain a cured product with a glass transition temperature of 240 °C, a tensile strength of 75 MPa, a tensile modulus of 4.7 GPa, an elongation at break of 1.8%, a flexural strength of 115 MPa, and a flexural modulus of 4.7 GPa . The mass ablation rate is 0.0201g / s. The cured product is thermally analyzed by TGA, and the test results are shown in Table 1

Embodiment 2

[0045] Example 2 Preparation of aldehyde-containing monocyclic benzoxazine (AS-BOZ) / diamine-type benzoxazine (B-BOZ) complex

[0046] Diphenylmethane diamine type benzoxazine (B-BOZ) 77g and 3-phenyl-6-formyl-3,4-dihydro-2H-1,3-benzoxazine (AS-BOZ) Mix 23g at a temperature of 90°C, then vacuumize at a temperature of 130°C for 0.5 hours at a vacuum degree of 0.05-0.095MPa, at 140°C for 1 hour, at 150°C for 2 hours, at 160°C for 1 hour, at 170°C 1 hour at 180°C, 1 hour at 190°C, 1 hour at 200°C, 1 hour at 220°C after curing. After TGA thermal analysis, the test results are shown in Table 1

Embodiment 3

[0047] Embodiment 3 prepares furfural and diamine type benzoxazine (B-BOZ) compound

[0048] Stir and mix 91g of diamine-type benzoxazine (B-BOZ) and 9g of furfural (Furfural) at a temperature of about 90°C, and then vacuumize at a temperature of 130°C at a vacuum degree of 0.05-0.095MPa for 0.5 hours, and then at 130°C 3 hours at 140°C, 1 hour at 140°C, 1 hour at 150°C, 1 hour at 160°C, 1 hour at 170°C, 2 hours at 180°C, 1 hour at 200°C, 1 hour at 220°C Finally, after TGA thermal analysis, the test results are shown in Table 1

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Abstract

The invention relates the heat-durability benzoxazine resin compound and preparing method, comprising the following steps: dissolving 50-95wt% benzoxazine resin intermediate, 0-50wt% aromatic compounds liquid resin with aldehyde group and 0-50wt% benzoxazine resin with aldehyde group into solvent between room temperature and 50Deg.C, getting heat-durability benzoxazine resin compound solvent, carrying out coating or dipping technology, getting prepreg, or mixing and getting solid resin compound, forming at 150Deg.C, carrying out heat treatment at 180Deg.C, and getting the product.

Description

technical field [0001] The invention relates to a heat-resistant benzoxazine resin compound and a preparation method thereof, and belongs to the field of thermosetting resins and high-performance composite material matrix resins and the preparation thereof. Background technique [0002] Benzoxazine is a kind of benzo six-membered heterocyclic ring system composed of oxygen atom and nitrogen atom. It has the characteristics of ring-opening polymerization, no small molecules are released during polymerization, and a network structure similar to phenolic resin is formed after polymerization. Small curing shrinkage, low porosity, excellent mechanical properties, electrical properties and flame retardant properties. In the 1940s, foreign countries conducted systematic research on the reaction of phenolic intermediates, amine intermediates and formaldehyde, and synthesized intermediates containing benzoxazine ring structures: [0003] [0004] Since the 1970s, foreign countrie...

Claims

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Application Information

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IPC IPC(8): C08L79/00C09K3/10C09K5/14H01B3/30
Inventor 顾宜田巧冉起超李曹成晓情盛兆碧
Owner SICHUAN UNIV
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