DMA (Dimethyl Aniline)

Product Overview

Dimethyl Aniline (DMA) is a tertiary aromatic amine accelerator used alongside cobalt promoters and peroxide catalysts like MEKP in unsaturated polyester and vinyl ester resin systems. It significantly enhances gelation control and cure speed, especially in cooler conditions or during winter production.

Key Benefits

• Temperature-Responsive Performance
  Speeds up gelation in low-temperature environments, ensuring consistent cure times across varying ambient conditions.

• Fine-Tuned Cure Control
  Offers adjustable cure profiles when used in combination with cobalt-promoted peroxide systems—ideal for customized processing needs. 

• Versatile Across Resin Types
  Suitable for use with orthophthalic, isophthalic, terephthalic, and vinyl ester resins; suitable for hand lay-up, spray-up, RTM, and tooling.

Typical Dosage & Performance

• Standard Dosage:

  • 0.1–0.5 parts per hundred resin (phr) when combined with 2–5 phr peroxide initiators

  • Provides moderate to fast cure times (~0.5–2 hours at 20 °C with 3 phr peroxide + 0.1 phr DMA)

• Customization Example (Standard Polyester Resin at 20 °C):

  • 3 phr peroxide + 0.1 phr DMA → ~0.5 hours to Persoz hardness 30 s

  • 0.4 phr DMA → extremely rapid cure (<0.5 h)

Typical Applications

• Low-Temperature Lamination
  Effective in colder climates to accelerate curing processes.

• Amine-Enhanced Resin Systems
  Used in conjunction with peroxide and cobalt systems for controlled cure, even when resin is pre-accelerated. 

• Tooling and Composite Manufacturing
  Ideal for spray-up, hand lay-up, tooling, filament winding, and RTM processes requiring precise cure timing. 

Safety & Handling

• Hazards: Corrosive, strong aromatic odor; may irritate eyes, skin, and respiratory system.

• PPE Required: Gloves, goggles, and adequate ventilation when handling—especially in high-concentration uses. 

• Storage: Keep in sealed containers at ambient temperature; typical shelf life of 12 months if stored properly.