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High reactivity with fast gel time for improved production efficiency in open-mold and spray-up processes.
Excellent mechanical strength and dimensional stability after curing, especially under humid or moderate thermal conditions.
Low styrene emission formulation supporting safer handling and compliance with industrial VOC management guidelines.
Good compatibility with standard peroxide initiators (e.g., MEKP) and common fillers/fibers including calcium carbonate and E-glass.
Consistent batch-to-batch rheology and viscosity for reliable process control in automated dosing and impregnation systems.
Fiberglass-reinforced plastic (FRP) tanks and chemical storage vessels.
Marine components including boat hulls, decks, and structural panels.
Industrial grating, ductwork, and corrosion-resistant linings for wastewater treatment infrastructure.
Automotive under-hood components and non-structural body panels requiring thermal resilience.
Wind turbine nacelle covers and secondary structural housings.
| Chemical Type | Orthophthalic unsaturated polyester resin |
| Product Form | Liquid, ready-to-use |
| Appearance | Clear to pale yellow viscous liquid |
| Viscosity (25°C, mPa·s) | 350–450 |
| Gel Time (with 1.0% MEKP at 25°C, min) | 18–24 |
| Styrene Content (wt%) | 38–42 |
| Solid Content (wt%) | ≈60 |
| Specific Gravity (25°C) | 1.12–1.15 |
Q1: What is the primary application of ETERSET 2960PT-S in composite manufacturing?
A: ETERSET 2960PT-S is specifically formulated for high-performance fiberglass-reinforced plastic (FRP) applications requiring excellent thixotropy, low styrene emission, and good mechanical retention after post-curing — commonly used in pultrusion, filament winding, and structural laminating processes.
Q2: How does the PT-S grade differ from standard unsaturated polyester resins?
A: The ‘PT-S’ designation indicates a specially modified resin with enhanced thixotropic behavior and reduced volatility, enabling improved sag resistance in vertical or overhead applications while maintaining compatibility with common peroxide initiators and low-profile additives.
Q3: Which initiators are recommended for use with ETERSET 2960PT-S?
A: This resin is compatible with standard methyl ethyl ketone peroxide (MEKP) systems; selection of initiator type and dosage should be based on ambient conditions, part thickness, and desired gel time — typical usage ranges from 0.8% to 1.5% by weight, adjusted during process qualification.
Q4: Can ETERSET 2960PT-S be blended with other unsaturated polyesters or vinyl esters?
A: Blending with other resins is not generally recommended without thorough compatibility testing, as it may adversely affect cure kinetics, final mechanical properties, and long-term dimensional stability; Chang Chun advises using ETERSET 2960PT-S as a standalone system for optimal performance.
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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
