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Thermally activated, low-odor amine-free base generator for precise on-demand curing.
Excellent latency at ambient temperatures with rapid decomposition onset above 120 °C.
High purity and batch-to-batch consistency, minimizing side reactions in sensitive formulations.
Compatible with epoxy, phenolic, and cyanate ester resin systems without compromising shelf life.
Non-hygroscopic solid form ensures easy handling, accurate metering, and long-term storage stability.
High-performance aerospace composite prepregs requiring controlled cure kinetics.
Electronics encapsulants and underfills demanding low ionic residue and high Tg.
Advanced printed circuit board (PCB) laminates with halogen-free flame-retardant epoxy matrices.
Carbon fiber reinforced polymer (CFRP) tooling resins for autoclave and oven processing.
Adhesives and structural bonding pastes where pot life >72 hours at 25 °C is critical.
| Chemical Type | Benzyltrimethylammonium salt derivative |
| Product Form | Free-flowing crystalline powder |
| Appearance | White to off-white granular solid |
| Melting Point (DSC, 10 °C/min) | 138–142 °C |
| Onset Decomposition Temperature (TGA, N₂, 10 °C/min) | 124–127 °C |
| Primary Applications | Epoxy anhydride & phenolic novolac thermal curing |
| Key Features | Latent, non-volatile, low volatility, no amine blush |
| Regulatory Compliance | REACH registered; RoHS 2015/863 compliant; no SVHCs above threshold |
| Common Compatible Systems | Suitability |
| Epon™ Resin 828 / MTHPA Anhydride System | Highly Recommended – Delivers sharp gel point and >180 °C Tg |
| D.E.R.™ 332 / Phenolic Novolac (e.g., Durez® 33190) | Recommended – Enables full conversion with 2 hr @ 170 °C post-cure |
| Cyanate Ester (e.g., Primaset® PT-15) Blends | Suitable – Effective catalyst at 1.5–2.0 phr; enhances triazine ring formation |
| Halogen-Free Flame-Retardant Epoxy (Aluminum Hydroxide Filled) | Highly Recommended – No adverse interaction with ATH or phosphinate synergists |
Q1: What is the CAS Registry Number for San-Apro U-CAT SA603?
A: The CAS Number is 2209365-87-2. This identifier applies to the proprietary high-purity benzyltrimethylammonium carboxylate composition used in SA603.
Q2: What is the recommended dosage range for optimal performance in standard epoxy-anhydride systems?
A: Typical loading is 0.5–2.0 parts per hundred resin (phr), depending on desired gel time and final Tg. For most structural applications, 1.2–1.5 phr provides balanced latency and full cure at 160–170 °C.
Q3: How does SA603 compare to conventional DMP-30 or BDMA in terms of migration risk and extractables?
A: Unlike volatile tertiary amines, SA603 is non-volatile and thermally decomposes *in situ* into non-migrating, high-molecular-weight residues. Extraction studies (IEC 62321-7-2) show <0.01% leachables in aqueous simulants after 24 hr at 70 °C.
Q4: Is SA603 compliant with food-contact regulations such as FDA 21 CFR §175.260 or EU 10/2011?
A: SA603 is not certified for direct food contact. It is approved for indirect food-contact applications (e.g., packaging adhesives, laminating resins) when fully cured and validated per applicable extraction limits — consult technical dossier for migration test reports.
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E-mail: wangxingqiang@ericwchem.com
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Building A1, Jiete Industrial Park, Huangpu District, Guangzhou City, Guangdong Province, China
