Curable flame retardant epoxy resin compositions
A technology of epoxy resin and flame retardancy, which is applied in the field of preparing electronic thin layers, and can solve problems such as increasing anti-cracking properties
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[0026] The present invention provides a method for the preparation of thermosetting epoxy resins that substantially improves the crack resistance properties of flame retardant epoxies with minimal acceptable modulus loss (between 5 percent and 20 percent between), and does not affect the glass transition temperature.
[0027] The present invention can prove that the strength and toughness of thermosetting resins can indeed be greatly improved. Thermosetting resins are, for example, epoxy resins, such as bisphenol A epoxides cured with phenol-formaldehyde resins, even though the epoxides contain brominated Epoxy to improve fire resistance properties. An important purpose of the present invention is to apply high-strength, toughness and flame-retardant thermosetting resins, such as epoxy resins, to applications such as microelectronics and advanced aircraft manufacturing. In particular, it provides good service temperature, fire resistance and toughness in the manufacture of pr...
example 1
[0138] 2g of PEO-PEP block copolymer (f PEO =0.25, M n =8,000g / mole, M w / M n =1.04) was added to the round bottom flask, and there were 24.00 grams of D.E.R.383 in the flask. 23 mL of acetone was then added to the flask and stirred until the block copolymer was completely dissolved (approximately two weeks). 14.00 g of the phenol formaldehyde resin was then added to the flask, and the contents of the flask were stirred until the phenol formaldehyde resin melted. Connect the flask to a vacuum system using a 24 / 40 connector. The acetone solvent will be slowly removed at room temperature until the last foam subsides (30 minutes). An oil bath was placed around the flask and the temperature was set at 50 °C. Solvent was removed at 50°C for 1 hour and the temperature was raised to 75°C (1 hour) and then to 100°C (30 minutes). After that, the temperature of the oil bath was set at 150° C., and after waiting for 10 minutes, the flask was separated from the vacuum system. The ...
example 2
[0142] 2g of PEO-PEP block copolymer (f PEO =0.25, M n =8,000g / mole, M w / M n =1.04) was added to the round bottom flask, and there was already 23 mL of acetone in the flask. 24.00 grams of D.E.R. 383 was then added to the flask and stirred until the contents of the flask were completely dissolved (approximately 1 or 2 days). 14.00 g of phenol formaldehyde resin was then added to the flask and stirred until dissolved. The flask was then connected to a vacuum system using a 24 / 40 connector. The acetone solvent will be slowly removed at room temperature until the last foam subsides (30 minutes). An oil bath was placed around the flask and the temperature was set at 50 °C. Solvent was removed at 50°C for 1 hour and the temperature was raised to 75°C (1 hour) and then to 100°C (30 minutes). After that, the temperature of the oil bath was set at 150° C., and after waiting for 10 minutes, the flask was separated from the vacuum system. The mixture of epoxy and block copolyme...
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