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What are the application scenarios of 2950 epoxy accelerator?
2025-08-25

What are the application scenarios of 2950 epoxy accelerator?
ZH2950 epoxy accelerator (such as Huntsman Accelerator 2950 or Yueyang Zhongzhan Technology ZH2950) is a high-efficiency co-reactive accelerator. Its core function is to significantly shorten curing time and improve system performance by catalyzing the cross-linking reaction between epoxy groups and curing agents. Its application fields cover multiple industrial scenarios, as follows:


I. Epoxy coatings and floor systems
1. Solvent-free epoxy coatings
?Application scenarios: Fields with strict requirements on VOC emissions, such as industrial floors, inner walls of storage tanks, and pipeline anti-corrosion.
?Advantages:
?Excellent low-temperature curing ability, enabling complete curing within 24 hours even at 5°C, suitable for winter construction or cold storage floors.
?When used with polyamide curing agents, it can increase curing speed by 30%-50% without significantly shortening the pot life.
?Typical case: For solvent-free epoxy coatings in ship ballast tanks, adding 1%-3% of 2950 can accelerate curing while maintaining coating flexibility and salt spray resistance.
2. Solvent-based epoxy coatings
?Application scenarios: Ship maintenance coatings (such as Araldite® GZ 7071 X 75 system), container coatings, and anti-corrosion paints for steel structures.
?Advantages:
?The pot life is approximately twice as long as that of traditional tertiary amine accelerators (such as DMP-30), facilitating large-area construction.
?At high dosages (e.g., 20 parts), it can cure quickly at 5°C, meeting the needs of emergency repairs.
3. Waterborne epoxy coatings
?Application scenarios: Environmentally friendly industrial coatings and architectural decorative coatings.
?Advantages:
?Excellent compatibility with waterborne amine curing agents, avoiding demulsification, and improving the initial water resistance and anti-corrosion performance of the paint film.
?The recommended addition amount is 5%-10% of the curing agent mass, which can shorten the surface drying time of waterborne epoxy to 2-4 hours at room temperature.
II. Composite materials and adhesives
1. Composite material molding
?Application scenarios: Wind turbine blades, FRP products, and mold processing.
?Advantages:
?When used with polyamide or polyamine curing agents, it can reduce the viscosity of the resin system, promote fiber wetting, and improve the flexural strength and impact resistance of the cured product.
?It maintains high curing efficiency even in low-temperature environments (e.g., 5°C), reducing mold occupancy time.
2. Structural adhesives
?Application scenarios: Metal-to-metal bonding, electronic component packaging, and automotive part assembly.
?Advantages:
?Accelerates the curing reaction of epoxy-amine systems, enabling the shear strength to reach more than 80% of the maximum value within 24 hours.
?It can replace part of the curing agent dosage (e.g., reduce by 10%-20%), maintaining bonding performance while reducing costs.
III. Polyurethane systems
1. Polyurethane adhesives and elastomers
?Application scenarios: Shoe material bonding, automotive interior parts, and industrial elastomers.
?Advantages:
?Adding 1%-3% can significantly shorten the demolding time (e.g., from 8 hours to 3 hours), improving production efficiency.
?Reacts with isocyanates to form urea bonds, enhancing the wear resistance and tear resistance of elastomers.
2. Polyurethane foams and coatings
?Application scenarios: Rigid polyurethane foam insulation materials and polyurethane waterproof coatings.
?Advantages:
?Catalyzes the trimerization reaction of isocyanates to form stable isocyanurate ring structures, improving the high-temperature resistance of foams (up to 150°C or higher).
?When compounded with foaming catalysts such as PC-41, it can adjust foam density and closed-cell rate.
IV. Special industrial fields
1. Electronic packaging materials
?Application scenarios: Semiconductor packaging and circuit board potting.
?Advantages:
?Low odor and low toxicity, meeting the environmental protection requirements of the electronics industry.
?Promotes the curing of epoxy-anhydride systems and reduces dielectric loss (<0.005), meeting the needs of high-frequency electronic components.
2. Concrete repair materials
?Application scenarios: Bridge crack repair and airport runway emergency repair.
?Advantages:
?Can cure quickly on wet substrates, forming strong bonding with concrete substrates (tensile strength > 3MPa).
?It can be formulated into two-component epoxy mortar with a compressive strength of over 60MPa.
V. Performance comparison and selection suggestions

Performance indicator

2950 epoxy accelerator

Traditional DMP-30 accelerator

Low-temperature curing ability

Completely cures within 24 hours at 5°C

Curing slows down significantly below 10°C

Pot life (solvent-based)

Twice as long as DMP-30

Relatively short, about 2-3 hours

Flexibility of cured product

Not easy to become brittle, excellent yellowing resistance

Prone to increased brittleness at high dosages

Odor and toxicity

Low odor, low VOC emissions

Strong pungent odor

Compatibility with water-based systems

Excellent, not easy to demulsify

Requires pre-emulsification, otherwise prone to stratification

 

Selection suggestions:

?Low-temperature environment: 2950 is preferred, as its curing efficiency at 5°C is more than 3 times that of DMP-30.
?Water-based systems: 2950 is the first choice to avoid demulsification caused by traditional accelerators.
?High-end coatings: If long-term weather resistance and aesthetics are required, 2950 has better yellowing resistance.
VI. Usage precautions
?
Ratio control:
?
?Epoxy systems: Calculate the theoretical dosage based on "epoxy equivalent weight/active hydrogen equivalent weight", usually 1%-5% of the resin mass.
?Polyurethane systems: The recommended addition amount is 0.5%-2% of the isocyanate mass; excessive dosage may cause foam shrinkage.
?
Mixing process:
?
?2950 must be fully mixed with the curing agent first, then added to the resin, and stirred at high speed for 2-3 minutes (300-500r/min) to ensure uniform dispersion.
?
Storage conditions:
?
?Store in a sealed container in a cool and dry place, avoid contact with water, and the shelf life is usually 12 months.

ZH2950 epoxy accelerator produced by Yueyang Zhongzhan Technology, as an upgraded version of DMP-30, has passed SGS environmental certification and is widely used in shipbuilding, wind power, electronics and other fields. Welcome to call (13975090964) for customized solutions.

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