| 摘要 |
The present invention relates to the use, for manufacturing electrical insulation parts, of a composition including, in addition to an epoxy-type thermosetting resin and a hardening agent, at least one organic catalyst having a vitrimer effect. Said composition allows the production of vitrimer resins, i.e., resins that are deformable in the thermoset state, which have properties that are suitable for use in electrical insulation parts. The invention also relates to a method for preparing electrical insulation parts using the aforementioned composition. |
| 主权项 |
1. A process for manufacturing an electrical insulation part, comprising using a composition comprised of a thermosetting resin of epoxy type, a curing agent, and at least one vitrimer-effect nonmetallic organic catalyst at a content ranging from 0.1 to 10 mol %, relative to the molar amount of epoxy functional groups present in the thermosetting resin, said catalyst being selected from compounds of guanidine type corresponding to the formula (I):in which:
X denotes a nitrogen atom, R1 denotes a hydrogen atom, a C1-C6 alkyl group or a phenyl group which can be substituted by a C1-C4 alkyl group, R2, R3 and R4 independently denote a hydrogen atom, a C1-C6 alkyl group, or a phenyl group which can be substituted by a C1-C4 alkyl group, or an acetyl group, or R1 and R2 form, together and with the atoms to which they are bonded, an unsaturated heterocycle and/or R3 and R4 form, together and with the atoms to which they are bonded, a saturated or unsaturated heterocycle. |
