MATT HARDENER HC 68 / HC 55

Matt Hardener HC 68 / HC 55 is a specialty curing and matting hardener system used mainly in powder coating formulations, and Matt Hardener HC 68 / HC 55 is valued for producing low-gloss or matte surfaces while supporting curing, film hardness, adhesion, and chemical resistance.
Matt Hardener HC 68 / HC 55 is commonly used in epoxy, polyester, hybrid, or specially designed powder coating systems where controlled gloss reduction, smooth surface appearance, and durable coating performance are required.
Matt Hardener HC 68 / HC 55 is typically supplied as a white to off-white powder or granule, and Matt Hardener HC 68 / HC 55 performance depends on resin type, acid value or epoxy equivalent, hardener dosage, extrusion conditions, curing temperature, film thickness, pigment loading, and compatibility with the complete coating formulation.

CAS Number: Mixture or grade dependent
EC Number: Mixture or grade dependent
Molecular Formula: Mixture; grade dependent
Molecular Weight: Mixture; grade dependent

Synonyms: Matt Hardener HC 68 / HC 55, Matte Hardener HC 68, Matte Hardener HC 55, Matt Curing Agent HC 68, Matt Curing Agent HC 55, Powder Coating Matt Hardener, Low Gloss Powder Coating Hardener, Matte Powder Coating Curing Agent, Gloss-Reducing Hardener, Powder Coating Matting Agent, Epoxy Polyester Matt Hardener, Specialty Matting Hardener, Matt Hardener HC 68/HC 55, Matt Hardener HC 68, Matt Hardener HC 55, HC 68 Matt Hardener, HC 55 Matt Hardener, Matting Hardener HC 68, Matting Hardener HC 55, Matte Hardener HC 68, Matte Hardener HC 55, Low-Gloss Hardener HC 68, Low-Gloss Hardener HC 55, Powder Coating Matt Hardener, Powder Coating Matting Hardener, Polyester Powder Coating Matt Hardener, Epoxy Polyester Matt Hardener, Matte Curing Agent HC 68, Matte Curing Agent HC 55, Matting Curing Agent HC 68, Matting Curing Agent HC 55, Low-Gloss Curing Agent HC 68, Low-Gloss Curing Agent HC 55, Powder Coating Curing Agent HC 68, Powder Coating Curing Agent HC 55, Matt Powder Coating Additive, Matting Powder Coating Additive, Matte Finish Hardener, Matt Finish Hardener, Low-Gloss Finish Hardener, Texture Finish Hardener, Wrinkle Finish Hardener, Surface Matting Hardener

APPLICATIONS

Matt Hardener HC 68 / HC 55 is used in powder coating formulations to produce matte or low-gloss surface finishes.
Matt Hardener HC 68 / HC 55 is incorporated into epoxy, polyester, or hybrid powder coating systems depending on resin compatibility and supplier recommendation.
Matt Hardener HC 68 / HC 55 is used in decorative powder coatings where controlled gloss and uniform surface appearance are required.

Matt Hardener HC 68 / HC 55 is used in metal furniture coatings to provide durable matte finishes with good hardness and scratch resistance.
Matt Hardener HC 68 / HC 55 is incorporated into architectural metal coatings in selected applications where low-gloss appearance and weatherable performance are required.
Matt Hardener HC 68 / HC 55 is used in appliance powder coatings where smooth matte texture and chemical resistance are important.

Matt Hardener HC 68 / HC 55 is used in general industrial powder coatings to improve visual appearance while maintaining cured film strength.
Matt Hardener HC 68 / HC 55 is incorporated into machinery and equipment coatings where low glare, durable protection, and uniform finish are desired.
Matt Hardener HC 68 / HC 55 is used in automotive component coatings in selected applications where matte appearance and mechanical durability are required.

Matt Hardener HC 68 / HC 55 is used to adjust gloss level without relying only on high filler loading or surface roughening additives.
Matt Hardener HC 68 / HC 55 is incorporated into formulations where chemical matting through curing behavior provides a more stable low-gloss effect.
Matt Hardener HC 68 / HC 55 is used in systems where balance between matte appearance, flow, leveling, and mechanical strength is required.

Matt Hardener HC 68 / HC 55 is used with pigments, fillers, flow agents, degassing agents, waxes, and suitable resins to tailor surface performance.
Matt Hardener HC 68 / HC 55 is incorporated into powder coating formulations where extrusion dispersion and curing profile determine final gloss and film quality.
Matt Hardener HC 68 / HC 55 is valued because Matt Hardener HC 68 / HC 55 helps produce consistent matte finishes while supporting crosslinking, hardness, adhesion, and coating durability.

Matt Hardener HC 68/ HC 55 is used as a matting hardener in powder coating formulations. Matt Hardener HC 68/ HC 55 is used to produce low-gloss polyester powder coatings. Matt Hardener HC 68/ HC 55 is applied in decorative metal coating systems. Matt Hardener HC 68/ HC 55 helps create smooth matt and semi-matt finishes.

Matt Hardener HC 68/ HC 55 is used in architectural powder coatings. Matt Hardener HC 68/ HC 55 supports matt finishes on aluminum profiles. Matt Hardener HC 68/ HC 55 is used in metal furniture coatings. Matt Hardener HC 68/ HC 55 helps improve appearance control in furniture finishes.

Matt Hardener HC 68/ HC 55 is applied in appliance powder coatings. Matt Hardener HC 68/ HC 55 helps provide uniform low-gloss surfaces on household equipment. Matt Hardener HC 68/ HC 55 is used in general industrial powder coatings. Matt Hardener HC 68/ HC 55 supports durable decorative finishes for metal substrates.

Matt Hardener HC 68/ HC 55 is used in polyester resin curing systems. Matt Hardener HC 68/ HC 55 reacts with suitable polyester resins during baking. Matt Hardener HC 68/ HC 55 helps form crosslinked thermoset coating films. Matt Hardener HC 68/ HC 55 improves coating hardness after curing.

Matt Hardener HC 68/ HC 55 is used in coatings for electrical cabinets. Matt Hardener HC 68/ HC 55 helps produce non-reflective protective surfaces. Matt Hardener HC 68/ HC 55 is applied in coatings for lighting fixtures. Matt Hardener HC 68/ HC 55 supports controlled gloss in indoor and outdoor fixtures.

Matt Hardener HC 68/ HC 55 is used in coatings for machinery parts. Matt Hardener HC 68/ HC 55 improves surface protection and visual uniformity. Matt Hardener HC 68/ HC 55 is used in coatings for tools and hardware. Matt Hardener HC 68/ HC 55 helps provide abrasion-resistant matt finishes.

Matt Hardener HC 68/ HC 55 is used in coatings for metal shelving and racks. Matt Hardener HC 68/ HC 55 supports durable low-gloss coating performance. Matt Hardener HC 68/ HC 55 is applied in coatings for office furniture. Matt Hardener HC 68/ HC 55 helps create professional matt decorative surfaces.

Matt Hardener HC 68/ HC 55 is used in textured powder coating systems. Matt Hardener HC 68/ HC 55 helps maintain gloss reduction in special-effect finishes. Matt Hardener HC 68/ HC 55 is used in fine-texture powder coatings. Matt Hardener HC 68/ HC 55 supports consistent surface appearance after curing.

Matt Hardener HC 68/ HC 55 is used in corrosion-resistant coating formulations. Matt Hardener HC 68/ HC 55 helps improve protection when combined with suitable primers and additives. Matt Hardener HC 68/ HC 55 is used in outdoor metal coatings. Matt Hardener HC 68/ HC 55 supports weather-resistant matt coating films.

Matt Hardener HC 68/ HC 55 is used in coatings for garden equipment. Matt Hardener HC 68/ HC 55 helps protect outdoor metal articles from environmental exposure. Matt Hardener HC 68/ HC 55 is used in coatings for bicycles and sporting goods. Matt Hardener HC 68/ HC 55 supports durable decorative and protective finishes.

Matt Hardener HC 68/ HC 55 is used in powder coating manufacturing. Matt Hardener HC 68/ HC 55 is blended with polyester resins, pigments, fillers, and additives. Matt Hardener HC 68/ HC 55 helps control curing and gloss development during baking. Matt Hardener HC 68/ HC 55 supports stable performance after extrusion and grinding.

Matt Hardener HC 68/ HC 55 is used in coating development laboratories. Matt Hardener HC 68/ HC 55 is applied in formulation testing for matt effect and film properties. Matt Hardener HC 68/ HC 55 is used in quality-control coating trials. Matt Hardener HC 68/ HC 55 helps evaluate gloss, hardness, adhesion, and impact resistance.

Matt Hardener HC 68/ HC 55 is used in specialty powder coating systems. Matt Hardener HC 68/ HC 55 supports professional coatings requiring durable low-gloss performance.

DESCRIPTION

Matt Hardener HC 68 / HC 55 is a specialty powder coating hardener family designed to provide curing and gloss-reduction behavior in compatible coating systems.
Matt Hardener HC 68 / HC 55 may function through differential curing, controlled incompatibility, surface micro-roughness formation, or resin-hardener reaction balance depending on the specific grade and formulation.
Matt Hardener HC 68 / HC 55 should be selected according to resin chemistry because epoxy, polyester, and hybrid powder systems require different curing mechanisms and stoichiometric balance.

Matt Hardener HC 68 / HC 55 helps reduce gloss by influencing film formation during bake cure, and final gloss depends strongly on cure temperature, film thickness, pigment volume concentration, and extrusion quality.
Matt Hardener HC 68 / HC 55 requires proper dispersion during premixing and extrusion because uneven distribution can cause gloss variation, surface defects, poor cure, or inconsistent mechanical performance.
Matt Hardener HC 68 / HC 55 should be used at the recommended dosage range because excessive use may reduce flow, flexibility, impact resistance, or chemical resistance.

Matt Hardener HC 68 / HC 55 is generally stable under normal dry storage conditions, but Matt Hardener HC 68 / HC 55 should be protected from moisture, heat, and contamination.
Matt Hardener HC 68 / HC 55 should be stored in tightly closed packaging to prevent caking and maintain consistent feeding during powder coating production.
Matt Hardener HC 68 / HC 55 should be used according to supplier formulation guidance, coating regulations, workplace safety standards, and the performance requirements of the final coating system.

Matt Hardener HC 68/ HC 55 is a specialty hardener for matt powder coating systems. Matt Hardener HC 68/ HC 55 is generally supplied as a solid powder. Matt Hardener HC 68/ HC 55 is usually white to off-white in appearance. Matt Hardener HC 68/ HC 55 is designed to reduce gloss in cured coating films.

Matt Hardener HC 68/ HC 55 provides curing and matting performance in polyester powder coatings. Matt Hardener HC 68/ HC 55 helps form thermoset coating networks during baking. Matt Hardener HC 68/ HC 55 contributes to controlled surface microstructure. Matt Hardener HC 68/ HC 55 supports uniform matt and semi-matt appearance.

Matt Hardener HC 68/ HC 55 provides good mechanical resistance in properly formulated coatings. Matt Hardener HC 68/ HC 55 helps improve film hardness and durability. Matt Hardener HC 68/ HC 55 supports good adhesion on prepared metal substrates. Matt Hardener HC 68/ HC 55 can contribute to chemical and weathering resistance.

Matt Hardener HC 68/ HC 55 is compatible with selected polyester powder coating resins. Matt Hardener HC 68/ HC 55 should be used at controlled formulation levels. Matt Hardener HC 68/ HC 55 can influence gloss, flow, leveling, and surface texture. Matt Hardener HC 68/ HC 55 performance depends on resin type, pigment loading, additives, and curing conditions.

Matt Hardener HC 68/ HC 55 should be stored in a cool and dry place. Matt Hardener HC 68/ HC 55 should be protected from moisture and contamination. Matt Hardener HC 68/ HC 55 should be kept in tightly closed packaging. Matt Hardener HC 68/ HC 55 should be handled with normal industrial hygiene practices.

Matt Hardener HC 68/ HC 55 requires proper dispersion during powder coating production. Matt Hardener HC 68/ HC 55 should be processed under suitable extrusion and grinding conditions. Matt Hardener HC 68/ HC 55 is valued for reliable matt-effect development. Matt Hardener HC 68/ HC 55 is suitable for decorative and protective low-gloss powder coatings.

Matt Hardener HC 68/ HC 55 is an important additive and curing component for durable matt powder coating formulations.

PROPERTIES

Common Name: Matt Hardener HC 68 / HC 55
Chemical Type: Specialty powder coating hardener; matting hardener; gloss-control curing agent
Appearance: White to off-white powder or granule
Odor: Mild characteristic odor or nearly odorless
Solubility: Generally insoluble or poorly soluble in water; compatible with powder coating melt systems
Melting Range: Grade dependent
Curing Function: Reacts or co-reacts in compatible powder coating systems during bake cure
Matting Function: Reduces gloss through controlled curing and surface formation behavior
Reactivity: Heat-activated; resin dependent
Stability: Stable under recommended dry storage conditions
Storage Temperature: 15–30°C, tightly closed, dry
Shelf Life: Typically 12–24 months in original sealed packaging, supplier dependent

FIRST AID

Inhalation:
Move to fresh air if dust is inhaled.
Seek medical attention if respiratory irritation, coughing, or discomfort persists.
Avoid breathing dust during weighing, premixing, grinding, and extrusion feed operations.

Skin Contact:
Wash skin with soap and water after contact.
Remove contaminated clothing if necessary and wash before reuse.
Seek medical advice if irritation develops or persists.

Eye Contact:
Rinse cautiously with water for several minutes.
Remove contact lenses if present and easy to do, then continue rinsing.
Seek medical attention if irritation persists.

Ingestion:
Rinse mouth with water.
Seek medical attention if discomfort occurs or if a significant amount is swallowed.
Never give anything by mouth to an unconscious person.

Note to Physicians:
Treat symptomatically.
No specific antidote is required.
Provide supportive care as needed.

HANDLING AND STORAGE

Handling:
Use appropriate PPE including gloves, safety glasses, and dust protection for bulk powder handling.
Avoid generating dust during transfer, weighing, premixing, extrusion feeding, and grinding operations.
Use clean, dry equipment to prevent contamination and maintain consistent gloss-control performance.

Ventilation:
Use general ventilation for normal handling.
Use local exhaust ventilation where dust may be generated.
Control airborne dust accumulation in enclosed powder processing areas.

Storage:
Store in tightly closed bags or containers in a cool, dry, well-ventilated area.
Protect from moisture, heat, direct sunlight, and contamination.
Keep away from strong oxidizers and incompatible reactive chemicals.

Spill and Leak Procedures:
Sweep or vacuum spilled powder while avoiding dust generation.
Collect into suitable containers for reuse or disposal according to local regulations and facility procedures.
Clean remaining residue carefully to prevent dust accumulation and slipping hazards.

Handling Precautions:
Confirm resin compatibility before use because Matt Hardener HC 68 / HC 55 performance depends strongly on the powder coating chemistry.
Control extrusion temperature, bake schedule, and film thickness because these factors strongly affect final matte level, surface smoothness, and cure performance.
Rotate stock using FIFO practices to maintain consistent powder flow, dispersion behavior, and gloss-control performance.