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Matt Hardener HC 68 / HC 55 gives powder coatings a controlled matte appearance while also contributing to the curing process.
Matt Hardener HC 68 / HC 55 is especially useful in epoxy and epoxy/polyester hybrid systems where low gloss, stable surface texture, and reliable film performance are required.
Matt Hardener HC 68 / HC 55's matting effect comes from creating a fine surface structure during curing, helping the final coating look smooth, uniform, and non-glossy.
Synonyms: Matt Hardener HC68, Matt Hardener HC55, HC68 Matting Hardener, HC55 Matting Hardener, Cyclic Amidine Matting Hardener, Powder Coating Matt Hardener, Epoxy Powder Coating Matting Agent
Matt Hardener HC 68 / HC 55 is a composed salt of cyclic-amidine and multi-acid.
Matt Hardener HC 68 / HC 55 utilizes the two different reaction rates of group in molecular structure, and during the curing process, it generates nonuniform shrinkage then forms the matt surface.
Matt Hardener HC 68 / HC 55 has both gloss decreasing and curing functions.
Matt Hardener HC 68 / HC 55 is a composed salt of cyclic-amidine and multi-acid.
Matt Hardener HC 68 / HC 55 shows both gloss decreasing and curing functions and can be applied in epoxy powder system to generate the strong matte effect, excellent levelling performance and stable comprehensive properties.
Matt Hardener HC 68 / HC 55 is recommended for use in pure epoxy and epoxy/polyester hybrid powder system and coatings as a hardner.
Matt Hardener HC 68 / HC 55 has high melting point and offers excellent mechanical properties and good reproducibility characteristics.
The shelf life of the product is 1 year.
Application and Performance of Matt Hardener HC 68 / HC 55:
Matt Hardener HC 68 / HC 55 can be applied in epoxy powder system to generate the strong matte effect, terrific leveling performance and stable comprehensive properties.
Matt Hardener HC 68 / HC 55 can be used for pure epoxy and epoxy/polyester hybrid powder systems as a hardener, making the coatings with super matte surface, excellent mechanical property and good reproducibility characteristic.
Due to Matt Hardener HC 68 / HC 55 has a higher melting point.
Matt Hardener HC 68 / HC 55's very important to evenly disperse it in formulation.
The users can suitably increase the extruding temperature to make sure the good dispersion (don't exceed 110°c).
In hybrid matting powder system, the polyester resin with low acid value should be selected, and it can be determined by the tests in order to obtain perfect gloss and optimal comprehensive properties.
Dosage: E-12: HC68 mass ratio: (8-10):1.
Stability and Reactivity of Matt Hardener HC 68 / HC 55:
Chemical stability:
Matt Hardener HC 68 / HC 55 is stable under normal dry storage and handling conditions.
Reactivity:
Matt Hardener HC 68 / HC 55 can react with epoxy resin systems during powder coating curing.
Conditions to avoid:
Heat, open flames, moisture, dust formation, and poor ventilation should be avoided.
Incompatible materials:
Strong oxidizing agents, strong acids, strong bases, and incompatible chemical products should be avoided.
Hazardous decomposition products:
Fire or thermal decomposition may produce carbon oxides, nitrogen oxides, irritating smoke, and organic vapors.
Handling and Storage of Matt Hardener HC 68 / HC 55:
Handling:
Handle in a well-ventilated area.
Avoid breathing dust.
Avoid contact with skin and eyes.
Storage:
Store tightly closed in a cool and dry place.
Keep away from moisture, heat, and other chemical products.
First Aid Measures of Matt Hardener HC 68 / HC 55:
Inhalation:
Move the person to fresh air.
Seek medical advice if respiratory irritation continues.
Skin contact:
Wash with soap and plenty of water.
Eye contact:
Rinse carefully with water for at least 15 minutes.
Ingestion:
Rinse mouth with water.
Do not induce vomiting unless directed by medical personnel.
Firefighting Measures of Matt Hardener HC 68 / HC 55:
Suitable extinguishing media:
Use water spray, foam, dry chemical powder, or carbon dioxide.
Special hazards:
Fire may produce irritating fumes and decomposition products.
Protective equipment:
Firefighters should wear self-contained breathing apparatus and protective clothing.
Accidental Release Measures of Matt Hardener HC 68 / HC 55:
Personal precautions:
Avoid dust inhalation and use gloves, goggles, and dust mask.
Environmental precautions:
Prevent release into drains, soil, and waterways.
Cleaning method:
Sweep or vacuum carefully without creating dust.
Collect into closed containers for disposal.
Exposure Controls / Personal Protection of Matt Hardener HC 68 / HC 55:
Engineering controls:
Use adequate ventilation or local exhaust ventilation.
Respiratory protection:
Wear a dustproof mask if dust exposure may occur.
Hand protection:
Wear protective gloves.
Eye protection:
Wear safety goggles.
Skin protection:
Wear suitable protective clothing.
Hygiene measures:
Wash hands after handling.
Do not eat, drink, or smoke in working areas.
Identifiers of Matt Hardener HC 68 / HC 55:
Grade Standard: Technical Grade
Physical State: Powder
Grade: 3329
Color: White
Moisture: 0.2-1 % Max
Properties of Matt Hardener HC 68 / HC 55:
Melting Range: 210-250°C
Solid Content: min. 99.0%
Curing Condition (180°C): 15~20 min
Curing Condition (190°C): 10~15 min
Curing Condition (200°C): 10~12 min
Appearance: White powder
Melting range (°C): 220-230
Solid content (%): ≥99.0
