polyurethane curing agent which is good? polyurethane curing agent which is more reliable?

Product Introduction
[category] 90-50 for quick-drying polyurethane curing agent

[characteristics] quick drying, light color, high gloss, good compatibility, high hardness, strong scratch resistance, good stability, excellent chemical resistance.

[Application scope] Suitable for quick-drying polyurethane topcoat, PU topcoat, primer, industrial paint, etc.

[technical specifications]]

Appearance
water white transparent mucus, no mechanical impurities
color (Fe-Co)
≤ 1#
viscosity
10-18 seconds/25 ℃ Grignard
solids%
50±1
-NCO%
8±1
Free TDI%
≦ 1
[resin compatibility] this product can be used with alkyd, acrylic resin crosslinking.

[storage] products are packed in sealed containers, stored in a ventilated warehouse away from light and heat at room temperature, away from fire sources, and the storage period is 12 months.