Thermoset Composites
Comprehensive curing systems and organic peroxide initiators for unsaturated polyester, vinylester, and (meth)acrylate resin applications. Perodox® brand products deliver reliable performance for FRP, gel coats, and composite manufacturing.
Reliable curing solutions for composite manufacturing
At Shandong Do Sender Chemicals, we manufacture a full spectrum of organic peroxides under the Perodox® brand, serving as initiators, curing agents, and crosslinking agents for the global thermoset composites industry.
Our ISO 9001-certified production facilities in Zibo, Shandong, combine advanced process control with rigorous quality testing to ensure every batch meets the demanding requirements of unsaturated polyester resin (UPR) curing, vinyl ester systems, and (meth)acrylate polymerization.
From room-temperature MEKP cure systems to high-temperature peroxide initiators, we offer tailored solutions with global temperature-controlled logistics and full UN 5.2 dangerous goods compliance.
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Applications
Our organic peroxides serve a wide range of thermoset composite and polymer manufacturing processes.
Unsaturated Polyester Resin (UPR) Curing
Room-temperature and elevated-temperature curing systems for UPR-based composites, including FRP boats, tanks, pipes, and automotive body panels.
Gel Coats & Top Coats
Peroxide initiators optimized for gel coat formulations that demand rapid cure, low porosity, and excellent surface finish in marine and sanitary ware applications.
Vinyl Ester Resin Systems
High-performance curing for vinyl ester resins used in chemical-resistant FRP equipment, corrosion barriers, and infrastructure rehabilitation.
Acrylic Resin Polymerization
Initiators for (meth)acrylate monomer polymerization, producing solid surface materials, dental composites, and specialty acrylic cast sheets.
Continuous Lamination
Fast-cure peroxide systems for continuous panel and sheet production, delivering consistent gel times and high throughput in automated processes.
Filament Winding & Pultrusion
Tailored initiator blends for filament winding and pultrusion of FRP pipes, poles, and structural profiles with precise exotherm control.
Product Categories
Our Perodox® organic peroxide portfolio is organized into five structural families, each optimized for specific thermoset curing and polymerization applications.
Featured Products
Key organic peroxide products trusted by composite manufacturers worldwide.
Perodox® MEKP
Methyl ethyl ketone peroxide · CAS 1338-23-4Industry-standard room-temperature curing agent for unsaturated polyester resins. Used with cobalt accelerators for FRP laminating, casting, and gel coat applications. Decomposition temperature ~50°C.
View DetailsPerodox® L75 / 50PS
Benzoyl peroxide · CAS 94-36-0Versatile BPO paste and powder for ambient-temperature UPR curing. Ideal for body filler, putty, and repair compounds. Available in multiple concentrations with phlegmatizers tailored for specific processing requirements.
View DetailsPerodox® C (TBPB)
tert-Butyl peroxybenzoate · CAS 614-45-9High-temperature initiator for (meth)acrylate polymerization and elevated-temperature UPR curing. Active in the 100–170°C range. Widely used in SMC/BMC molding, pultrusion, and acrylic sheet casting.
View DetailsPerodox® 14 (BIPB)
Di(tert-butylperoxyisopropyl) benzene · CAS 25155-25-3Premium crosslinking peroxide for EPDM, silicone rubber, and specialty elastomers. Low odor and low bloom compared to DCP. Active in the 135–175°C processing window with excellent scorch safety.
View DetailsPerodox® K (CHP)
Cumyl hydroperoxide · CAS 80-15-9High-temperature curing alternative for polyester resins, active at 80–90°C. Also used as an initiator in styrene and acrylonitrile polymerization. Suitable as a replacement for MEKP in elevated-temperature curing processes.
View DetailsPerodox® 21 (TBPEH)
tert-Butyl peroxy-2-ethylhexanoate · CAS 3006-82-4Low-temperature initiator active around 73°C. Suitable for UPR curing, silicone rubber crosslinking at moderate temperatures, and LDPE polymerization. Offers a balanced reactivity profile for controlled exotherm.
View DetailsTechnology & Expertise
Our technical capabilities span the full lifecycle of organic peroxide application in thermoset composites.
Gel Time & Cure Profiling
Precise characterization of gel time, peak exotherm, and cure profile under your specific resin and processing conditions.
Formulation Optimization
Custom peroxide blends and accelerator packages to match your desired pot life, cure speed, and final mechanical properties.
Temperature-Controlled Logistics
Full UN 5.2 / IMDG-compliant global cold-chain shipping with real-time temperature monitoring to preserve product quality.
Downloads
Technical documentation for our thermoset composite product range.
Get in Touch
Our technical team is ready to help you select the right organic peroxide system for your thermoset composite application. Contact us for product recommendations, sample requests, or formulation support.