Synolite NN-I-2 is a pre-accelerated, thixotropic unsaturated polyester resin from AOC, formulated as a mixed resin for hand lay-up and spray processing. It features good wetting and process properties, and contains a low styrene emission (LSE) system with a tack-free surface, making it a practical choice for composite fabricators who need consistent gel time and process control. This page summarizes the technical and safety data published in the manufacturer’s Technical Data Sheet and Safety Data Sheet.
What Is Synolite NN-I-2?
Synolite NN-I-2 is an unsaturated polyester resin supplied as a purple liquid. It is already pre-accelerated and thixotropic, meaning it contains built-in accelerant and thickening additives from the manufacturer, which supports proper operating time once a curing agent is added. Because the resin contains an accelerant, storage tanks or drums should be stirred prior to use, since the thixotropic component can settle slowly during long storage.
Ingredient content can vary slightly by production batch, and buyers should always confirm current specifications with the manufacturer’s latest Technical Data Sheet and Safety Data Sheet before placing an order.
Technical Specifications of Synolite NN-I-2
The table below summarizes the core liquid resin properties of this product as published in the manufacturer’s Technical Data Sheet (Version 1.0, 2020.03.20).
| Property | Value |
|---|---|
| Appearance | Hazy |
| Viscosity @23℃ | 200–700 mPa.s |
| Gel time (25℃ to 35℃) | 14–45 min |
| Flash point | 33℃ |
| Stability (no initiator, dark, 25℃) | 6 months |
Reactivity measurement per the Technical Data Sheet: 2.0 g Butanox® M50 added to 100 g of resin.
Physical and Chemical Properties
According to the Safety Data Sheet, the physical and chemical properties of this resin are as follows:
- Physical state: Liquid; Color: Purple; Odor: Characteristic
- pH: 7 (Conc. 0.02% w/w)
- Boiling point: 145℃; Flash point (closed cup): 33℃
- Density: 1.1 g/cm³ at 23℃
- Viscosity (dynamic, room temperature): 350–800 mPa·s
- Solubility in water: <0.02 g/l (not miscible)
The main reactive ingredients listed in Section 3 of the Safety Data Sheet are styrene (CAS 100-42-5, 25–50%) and cobalt bis(2-ethylhexanoate) (CAS 136-52-7, ≤0.3%), which functions as the built-in accelerant.
Applications and Processing Guidelines for Synolite NN-I-2
It is well suited for hand lay-up and spray techniques. The manufacturer’s processing guidelines outline the following practical points for fabricators:
- MEKP is the recommended curing agent, dosed at 1%–2.5% and adjusted according to workshop temperature.
- If a longer gel time above 60 minutes is required, TBC can be added as an inhibitor.
- Workshop temperature should be maintained between 18℃ and 32℃, with relative humidity between 40% and 90%, for stable product performance.
- Room-temperature-cured parts should cure for 24 hours before post-curing; post-curing at 80–100℃ for 3–6 hours is recommended, and is particularly important for parts requiring chemical resistance.
Safety, Handling, and Storage for Synolite NN-I-2
Per its Safety Data Sheet, this resin is classified as a Danger under GHS: Flammable Liquids Category 3, Skin Corrosion/Irritation Category 2, Serious Eye Damage/Eye Irritation Category 2A, Skin Sensitization Category 1, Carcinogenicity Category 2, Toxic to Reproduction Category 1B, Specific Target Organ Toxicity (Repeated Exposure) Category 1, and Aquatic Hazard (Acute) Category 2. Buyers and users should obtain and review the full Safety Data Sheet before handling.
For storage, the manufacturer recommends keeping it in a dark and dry place at temperatures between 5℃ and 30℃. The shelf life of styrene-containing resin is significantly reduced when exposed to light, so the resin should be stored only in 100% light-tight containers and away from direct sunlight, ignition sources, and oxidizing materials.
Recommended personal protective equipment per the SDS includes chemical-resistant gloves (Viton or nitrile rubber per EN 374), eye protection meeting EN 166, anti-static protective clothing, and a properly fitted respirator with gas filter A (EN14387) when ventilation is inadequate.
Sourcing Synolite NN-I-2 Through chemicalsstore.com
Composite fabricators, boat builders, and industrial buyers sourcing unsaturated polyester resin products such as Synolite NN-I-2 can contact chemicalsstore.com for current availability, supply chain resource support, and coordination on order volumes, lead times, and documentation requests, including the manufacturer’s Technical Data Sheet and Safety Data Sheet.
Frequently Asked Questions About Synolite NN-I-2
What is the viscosity of Synolite NN-I-2?
Its viscosity is 200–700 mPa.s at 23℃, as published in the manufacturer’s Technical Data Sheet.
What is the gel time?
The gel time is 14–45 minutes between 25℃ and 35℃, measured with 2.0 g Butanox M50 added to 100 g of resin.
Which curing agent is recommended?
MEKP is recommended at a dosage of 1%–2.5%, adjustable according to workshop temperature; TBC can be added as an inhibitor if a longer gel time is needed.
Is it a hazardous material?
Yes. According to its Safety Data Sheet, it carries a GHS Danger signal word, including flammable liquid, skin and eye irritation, skin sensitization, and reproductive toxicity hazard classifications. Review the full SDS before handling.
How should it be stored?
Store it in a dark, dry place between 5℃ and 30℃, in 100% light-tight containers, away from direct sunlight, heat, and ignition sources.
To request current availability, technical documentation, or a formal quotation for Synolite NN-I-2, contact the chemicalsstore.com sourcing team with your target volume and application details.
