Definisyon ajan geri

Ajan geri, ke yo rele tou hardener, ajan geri oswa ajan geri, se yon kalite sibstans oswa melanj ki ankouraje oswa kontwole reyaksyon an geri. Resin geri se yon pwosesis kote résine thermosetting sibi chanjman irevokabl atravè reyaksyon chimik tankou kondansasyon, fèmen bag, adisyon oswa kataliz. Geri se konplete lè w ajoute ajan geri (cross-linking).
Ajan geri yo klase dapre konpozisyon chimik 1. Amine alifatik, tankou vinyltriamin DETA, aminoethylpiperazine AE 2. Amine aromat, tankou m-phenylenediamine m-PDA MPD, diaminodiphenylmethane DDM HT-972 DEH-50 3. Amidoamines 4. Amine geri inaktif 5. Ranplasan ure.