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Low exotherm profile for improved control during curing and reduced thermal stress in thick-section laminates.
Excellent compatibility with standard MEKP initiators and enhanced inhibition stability for extended pot life.
High mechanical strength retention after post-cure, especially under humid or elevated temperature conditions.
Low styrene emission formulation supporting compliance with occupational health and environmental handling guidelines.
Consistent viscosity and gel time performance across production batches for reliable process repeatability.
Fiberglass-reinforced plastic (FRP) tanks and vessels for chemical storage.
Marine deck and hull components requiring low heat buildup during lay-up.
Industrial grating and structural profiles for corrosion-resistant infrastructure.
Wind turbine blade subcomponents and mold tooling matrices.
Transportation interior panels and lightweight composite enclosures.
| Chemical Type | Unsaturated orthophthalic polyester resin |
| Product Form | Liquid, ready-to-use |
| Appearance | Clear to pale yellow, homogeneous liquid |
| Viscosity (25°C) | 350–450 mPa·s |
| Gel Time (with 1.0% MEKP, 25°C) | 18–24 minutes |
| Reactive Diluent | Styrene (38–42% w/w) |
| Density (25°C) | 1.11–1.13 g/cm³ |
| Acid Value | 18–22 mg KOH/g |
Q1: What is the primary application field for Kingchem LTW B Polyester Resin?
A: Kingchem LTW B is specifically formulated for use in laminating and casting applications within fiber-reinforced polymer (FRP) composites, particularly where enhanced thixotropy, low styrene emission, and good interlaminar adhesion are required — such as in marine hulls, wind turbine blade components, and corrosion-resistant tanks.
Q2: How does LTW B differ from standard orthophthalic polyester resins?
A: LTW B features a modified molecular architecture that delivers improved viscosity stability at elevated temperatures, reduced post-cure shrinkage, and superior compatibility with both peroxide and cobalt-free curing systems — enabling more consistent gel times and better surface finish in thick-section laminates.
Q3: Can LTW B be used with alternative initiators beyond MEKP?
A: Yes, LTW B demonstrates broad initiator compatibility, including low-temperature peroxides (e.g., LUPEROX® 231), vinyl-based accelerators, and certain amine-initiated systems — though optimal performance is achieved when matched with recommended accelerator packages and validated under actual process conditions.
Q4: Is LTW B suitable for contact molding processes requiring extended working time?
A: Yes — LTW B is engineered to provide extended pot life without sacrificing reactivity during cure, especially when formulated with low-reactivity accelerators and processed at controlled ambient temperatures. Its rheology supports smooth brush/roller application and minimizes sag on vertical surfaces.
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E-mail: wangxingqiang@ericwchem.com
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