Process for the preparation of glycidyl compounds

Details Process for the preparation of glycidyl compounds Process for the preparation of glycidyl compounds

C - Chemistry, Metallurgy

07

D

402/289, 402/43,

C07D 301/28 (2006.01) C07D 303/20 (2006.01) C07D 303/22 (2006.01) C07D 303/24 (2006.01) C08G 59/06 (2006.01) C08G 59/08 (2006.01) C08L 63/00 (2006.01)

Patent

CA 1246596

Improved process for the preparation of glycidyl compounds Abstract of the Disclosure A process for the preparation of glycidyl compounds by reacting a compound containing at least one phenolic group with at least the equivalent amount, based on the phenolic group, of a halohydrin in a substantially anhydrous, aprotonic solvent in the presence of a solid, substantially anhydrous catalyst, is described, which process comprises carrying out the reaction at a temperature in the range from 40° to 80°C in the presence of an alkali metal carbonate, an aprotonic dipolar solvent with a static relative dielectric constant of more than 25 (at 25°C) and a permanent electric dipole moment of more than 2.5 D being used, an additional feature of said solvent being that the transition energy of the solvatochromic absorption band of the dissolved N-(3,5-diphenyl-4-hydroxyphenyl)-2,4,6-tri- phenylpyridinium perchlorate is in the range from 168 to 197.4 kJ/mole (at 25°C), or which process comprises carrying out the reaction at a temperature in the range from 60° to 80°C in the presence of an alkali metal hydroxide and a phase transfer catalyst chosen from the group consisting of ammonium and/or phosphonium compounds, the water of reaction formed being removed continuously and an inert, aprotonic, apolar solvent with a static relative dielectric constant of less than 8.0 (at 25°C) and a permanent electric dipole moment of less than 2.0 D being used, an additional feature of said solvent being that the transition energy of the solvatochromic absorption band of the dissolved N-(3,5-diphenyl-4- hydroxyphenyl)-2,4,6-triphenylpyridinium perchlorate is in the range from 140 to 165 kJ/mole (at 25°C). The resins obtained in this manner have a high degree of epoxidation and a low content of hydrolysable or ionic halogen. They are particularly suitable as potting resins for electronic components.

525013

Affiliated with

Also associated with

Rating

Process for the preparation of glycidyl compounds does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for the preparation of glycidyl compounds, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the preparation of glycidyl compounds will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1336177