Detailed Product Description

Primid hardener (coating additive)

1. Property: Appearance: white or pale powder

Volatile: ≤ 1.5%

OH-Equi.: 82± 2g/eg

Melting range: 124-129°C (by GB9284)

2. Application: DY-552 is a curing agent suitable for the production of outdoor-used polyester coatings.It has the characteristics of low toxicity, no irritant to skin and goodweather durability. Thus it is a good alternative of TGIC.

The chemical structure of DY-552 is a-hydroyxyalklamide.DY-552 can be cured with carboxylic polyester. The acid value ranges form 25-45 mgkOH/g. In order to minimize the yellowing, the appropriate resin should be preferredin formulation. A certain amount of a degassing additive is, however, generallyrecommended to prevent micro-pinholes due to the production of water in thecross-linking reaction. Typically cure schedules are required to develop fullcoating properties ranging from 5min at 200° C to 20min at 150° C, generally,15min at 180° C is preferred.

The reference formulation is shown in thefollowing:

PE: 600g

DY-552 (Dongyuan): 3.1g

DY-88 (Dongyuan): 10g

BENZOE (Dongyuan): 4g

R902 (TiO₂, Dupont): 350g

3.Storage: Keep ventilative and dry in normal temperaturePrevent direct sunshineKeep it far away from hot and fire substanceUse dustproof respirator and gloves for protection in operation

Packing: Packaged in multi-ply paper bagsN.W.: 25kg/bag

The information herein is to the best of knowledge.As the using conditions are not under our control, no guarantees are given. For liability on our side, we referto general standard items and conditions printed in the brochure.

 Packing :
Packaged in multi-ply paper bags net weight: 25kg/bag.
 Storage :
Keep ventilative & dry in normal tempreture; prevent direct sunshine;keep it far away from hot & fire substance. Use dustproof respirator & gloves for protection in operation