Unsaturated polyester resins


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Unsaturated polyester resins (UPR) are solutions of unsaturated polyesters dissolved in a low-viscosity monomer (such as styrene). Through a chemical reaction with the monomer and organic peroxides (hardeners), these resins become solid and durable. UPRs are frequently used in conjunction with glass fibers, carbon fibers, or aramid fibers (FRP) to produce strong and lightweight materials. They find applications in various industries, including construction, automotive, and water sports.
PRODUCT NAME Chemical Structure Versions BMC/SMC Infusion/RTM Spraying Pultrusion FRP Gelcoat Primary applications Technical Data Sheet Safety Data Sheet
Azastral 12 orthophthalic - ✔️ - - - - - Recommended for SMC and BMC applications. TDS SDS
Azastral 15 isophthalic/NPG - - - ✔️ ✔️ ✔️ ✔️ Recommended for applications requiring high chemical and mechanical resistance, UV resistance, elasticity, and impermeability. Ideal for industrial and commercial products exposed to harsh conditions, such as marine construction, boats, swimming pools, tanks, and pipes). TDS SDS
Azastral 22 orthophthalic - ✔️ - - ✔️ - - Recommended for manufacturing fiberglass-reinforced parts through hot pressing. The molding material can be obtained in sheet form (SMC) or bulk form (BMC). TDS SDS
Azastral 30 orthophthalic - - - - - ✔️ - Recommended for casting applications such as the production of artificial stone, marble, and onyx. TDS SDS
Azastral 56 orthophthalic - - - ✔️ - ✔️ - Recommended for the manufacture of structural walls, pipes and tanks. TDS SDS
Azastral 60 orthophthalic - - ✔️ ✔️ - ✔️ ✔️ Recommended for producing general-purpose composite materials (pipes, tanks, body components, sanitary ware, polymer concrete, artificial marble, fillers). TDS SDS
Azastral 60 PL orthophthalic preaccelerată, emisie scăzută de stiren - ✔️ ✔️ - ✔️ ✔️ Pre-accelerated version with low styrene emission of Azastral 60 resin. TDS SDS
Azastral 60 PTL orthophthalic preaccelerată, tixotropizată, emisie scăzută de stiren - ✔️ ✔️ - ✔️ ✔️ Tixotropic, pre-accelerated version with low styrene emission of Azastral 60 resin. TDS SDS
Azastral 60 PTL VR orthophthalic preaccelerată, tixotropizată, emisie scăzută de stiren, vâscozitate redusă - ✔️ ✔️ - ✔️ ✔️ Low viscosity version of Azastral 60 PTL resin. Recommended for applications requiring a high filler content. TDS SDS
Azastral 65 orthophthalic - - ✔️ ✔️ - ✔️ ✔️ Recommended for producing fiberglass-wound components or for manual lay-up processes. Fiberglass-reinforced products include pipes, storage tanks, and containers. TDS SDS


     Legend:    P- pre-accelerated, T- thixotropic, L- low styrene emission, VR- Reduced viscosity

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