MB68 · Matt Hardener/Curing Agent
Product No. 101 P 201 · Salts of polycarboxylic acid with cyclic amidine.
1. Product Information
2. Description
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.
3. Technical Data
| Property | Matt Hardener/Curing Agent MB68 |
|---|---|
| Appearance | White powder |
| Melting Range | 224 – 230 ℃ |
| Purity | ≥ 99% |
4. 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.
Typical Formulations
The following gives the formulations of MB68 for matt epoxy coatings:
| Gloss Formulation | 2.0 – 3.5 | 15 – 25 |
|---|---|---|
| Epoxy (604) | 300g | 250g |
| Polyester | — | 50g |
| 701 | 5g | 5g |
| MB68 | 30g | 20g |
| BaSO₄ | 175g | 165g |
| WD88 | 5g | 5g |
| Benzoin | 2g | 2.5g |
| Carbon Black | 4g | 3g |
- The gloss level of powder coating can be adjusted by the usage of MB68 and TiO₂.
- Epoxy (604) is the same as Epoxy E-12.
- Polyester: Acid value 25-35 KOH mg/g.
- 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 curing of coatings.
5. Curing Conditions
| Temperature | Time |
|---|---|
| 180 ℃ | 20 – 25 min |
| 190 ℃ | 12 – 15 min |
| 200 ℃ | 10 – 12 min |
6. 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 2 years in accordance to the specification. All opened bags should be carefully resealed immediately after use.
7. Disclaimer
This information and all further technical advice is based on our present knowledge and experience. However, it implies no liability or other legal responsibility on our part, including with regard to existing third-part intellectual property rights, especially patent rights. In particular, no warranty, whether express or implied, or guarantee of product properties in the legal sense is intended or implied. We reserve the right to make any changes according to technological progress or further developments.
The customer is not released from the obligation to conduct careful inspection and testing of incoming goods. Performance of the product described herein should be verified by testing, which should be carried out only by qualified experts in the sole responsibility of a customer. Reference to trade names used by other companies is neither a recommendation, nor does it imply that similar products could not be used.