What are the characteristics of epoxy curing agent? Epoxy resin curing agent reacts with epoxy resin and forms a kind of polymer. What are the significant characteristics of epoxy resin curing agent? Let's discuss it next.

Phthalic anhydride is also known as phthalic anhydride, phthalic anhydride, phthalic anhydride, referred to as PA. White needle-shaped crystals or powder with slight odor. Melting point 128 ~ 131℃, boiling point 295℃(sublimation). Low toxicity, LD508000mg/kg. Anhydride equivalent 148, reference pulp 30 ~ 50, suitable period at room temperature for 6h; 100℃/4h; 120℃/1.5h. Curing conditions l00℃/2h+150℃/5h or 100℃/12h or 140℃ /8h or 150℃/6h or 200℃/6h. The thermal deformation temperature of the cured material is 100 ~ 152℃, and the water absorption (24h) is 0.05%.

Epoxy resin curing agent is a chemical reaction with epoxy resin to form a network of three-dimensional polymer, the composite material envelope in the network body. An additive that turns a linear resin into a tough solid.

The curing temperature of various curing agents is different, and the heat resistance of cured products is also very different. Generally speaking, the use of curing agent with high curing temperature can obtain excellent heat resistant curing materials. For addition polymer-based curing agents, curing temperature and heat resistance are increased in the following order: aliphatic polyamines < aliphatic polyamines < aromatic polyamines ≈ phenolics < anhydride.