Hardeners in powder coatings industry

DICY

Description

DICY (Chemical name: Dicyandiamide) is one of the major curing agents in Epoxy powder coating, white powder with density of 1.40/cm3, melting range at 207~209C, which is stable when in dry powder.

Specifications

Appearance

White crystal

Impurity precipitating test

Approved

Purity % min

99.5

Dry Loss % max

0.30

Ash content % max

0.05

Calcium Content, ppm, max

200

Applications and packing

  1. 1.Mainly used in powder coatings and CCL.
  2. 2.20kg/ CTN, store in cool, dry and ventilated place.

TGIC

Introduction

TGIC (Tris(2,3-Epoxy propyl Isocyanurate) is an isocyanurate base crystalline polyepoxide compound, as the curing agent for polyester type and acrylic stype powder coating system, with the properties of good heat and weather resistance along with excellent high temperature stability.

Specifications

Appearance

White powder or granule

EEW

105 min

Chlorine content

1.5% max

Melting range

90-125C

Melt Viscosity(125C)

100 cps max

Volatile

1% max

Free ECH content

50 ppm max

Particle size

3-12 mesh

Packing and storage:

  1. 1.25kg/drum or bag
  2. 2.Store in dry and venting, clean indoor, keep away from moisture, heat and flame.

Hardener Accelerator B31

Description

B31, Chemicals name of 4,5-di hydro-2-phenyl-1H-imidazole is a curing accelerator for epoxy resin. With the chemicals structure containing cyclic amidine with good compatibility with the base resin alone and with less yellowing property when compare with 2-methyl imidazole after baked, which are mainly used for the coating of automobile spring and shell capacitor.

Specifications:

Appearance

Light yellow crystal or flake

Melting range

95-101 C

Recommended formulation

Item

Epoxy resin (EEW 850-1000)

Epoxy Resin (EEW750-850)

Epoxy Resins

56.0

55.5

B31

3.5

4.0

TiO2

40

40

Leveling agent

0.5

0.5

Packing and storage:

  1. 1.20kg/bag
  2. 2.Store in dry, dark and ambient place.
  3. 3.Prevent from pre-crosslinking please keep the extrude temp. below 100C

Curing agent XL552

Introduction

XL-552 (chemicals name:β-hydroxyalkamide ) is a curing agent suitable for the production of outdoor polyester powder coating system, It has the characteristics of low toxic, no irritation to skin, good weather stability, widely used as the substitute for TGIC.

Properties:

Appearance

White powder

Melting range

124-129C

OH value g/eq.

82±2

Non Volatile: % min.

99

Packing and storage:

  1. 1.25kg/bag
  2. 2.Keep in dry place prevent from moisture and flame.

Curing agent XL552-II

Description:

XL552-II also contain β-hydroxy alkylamide but further blend with degassing agent to increase the properties of anti-yellowing alone with better flow when compare with XL552, it will decrease the dosage of benzoin which is the major cause of yellowing when baked.

Specifications

Appearance

White powder

Melting range

130-145 C

OH Value: g/eq.

100±2

Non Volatile, % min.

99

Packing and storage:

  1. 1.25kg/bag
  2. 2.Keep in dry, dark and prevent form heat, moisture and flame.