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Product Name：Curing Agent MB68
Matt Hardener MB68
Descript ion:
Curing Agent MB68/Matt Hardener MB68 is the salts of polycarboxylic acid with Cyclic amidine. The hardener, applied in suitable formulations can produce epoxy or Hybrid coatings for matt or semi-matt gloss with very good flow and properties. Variation between matt and semi-matt surface can be obtained by means of suitable adjustment of formulation.
Information:
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Chemical name
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Pyromellitic acid di (2-phenyl-2-imidazoline) (1:1) salt
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Alternative chemical Name
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4,5-Dihydro-2-phenyl-1H-imidazole -1,2,4,5-benzenetetracarboxylate
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Product Code
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Curing Agent MB68/Matt Hardener MB68
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Chemical structure
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Molecular formula
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C10H6O8.C9H10N2
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CAS No.
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54553-90-1
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EINECS No.
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259-224-4
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Molecular Weight
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400.34 [g/mol]
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Technical data:
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Curing Agent/Matt Hardener MB68
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Appearance
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White powder
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Melting range
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224~230℃
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Purity
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≥99%
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Application:
The hardener may be applied both in pure epoxy and hybrid (epoxy-polyester) resin powder coatings. Epoxy coatings of gloss range level ranging from 5%~10% and hybrid coatings with gloss levels ranging from 10%~70% ( or greater ) may easily be formulated by the use of MB68. Coatings produced with MB68 is characterized by color and gloss stability under normal baking conditions. Hybrid coating with matt or semi-matt gloss may be achieved by replacing some of the polyester in the formulation with an equivalent quantity of MB68.
The following gives the formulations of MB68 for matt epoxy coatings.
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Gloss
Formulation
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2.0-3.5
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15-25
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Epoxy(604)
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300g
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250g
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Polyester
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---
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50g
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701
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5g
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5g
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MB68
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30g
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20g
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BaSo4
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175g
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165g
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WD88
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5g
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5g
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Benzoin
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2g
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2.5g
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Carbon Black
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4g
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3g
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*The gloss level of powder coating can be adjusted by the usage of MB68 and TiO2
* Epoxy (604) is same as Epoxy E-12
* Polyester: Acid value 25-35KOHg/mg
* WD88 is a leveling agent with silica carrier available from Huangshan Wellde Industry
Co.,Ltd. It's noted that the achievement of matt effect and relevant properties of the film is connected with full cured of coatings.
Claim: Above information is offered as a recommendation only. The suitability of MB68 should be determined by evaluation in your finished application.
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Object Temperature
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Time
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180℃
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20-25min
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190℃
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12-15min
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200℃
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10-12min
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Storage and Packaging
The product is delivered in flat PE-bags, net weight 20kg or 25kg. If kept cool (0-40℃) and dry in closed bags the product can be stored for at least 1 year in accordance to the specification. All opened bags should be carefully resealed immediately after use.
