Arotran ™ unsaturated polyester, epoxy vinyl ester and B-side resins

Arotran resins and resin systems can be utilized in the automotive and heavy-truck markets for both Class A and structural-part applications. Arotran resins can be utilized in a wide range of processes such as sheet molding compound (SMC), high-pressure resin-transfer molding, open-mold laminating, bulk-molding compounding (BMC) and infusion.

Arotran resin technology provides excellent mechanical properties, toughness and surface appearance. Arotran resins with Ekadure™ UV technology provides a molded-in black color that eliminates the need for paint with excellent UV stability.

Arotran Class A SMC and structural resins utilize nano-composite materials to provide original equipment manufacturers and molders with lower-mass SMCs which result in lighter parts. Parts made from Arotran Class A resins offer superior surface finish, reduction in paint pops, excellent bond and paint adhesion properties. Parts made from Arotran structural resins provide lower-mass structural parts with excellent mechanical and heat-resistance properties.

Arotran B-side resins are blended thermoset and thermoplastic-carrier resins that are combined with magnesium oxides to control thickening response.

Application Information




Exterior Body Panels

Fabrication of body panels, e.g., doors, deck lids, roofs, hoods, fascia and fenders requiring Class A paintable finishes.

  • Light-weight
  • Reduced paint pops
  • Class A finish


Exterior Unpainted Parts

Fabrication of UV-stable substrates for uses in pick-up boxes and tonneau covers. 

  • UV Resistant
  • Superior toughness


Structural Parts

Fabrication of reinforcement panels, e.g., hood inners, underbody shields, grill opening reinforcements, floor pans, valve covers and heat shields.   

  • Lightweight
  • Superior physicals
  • Heat resistant


Document Library

Product Literature(publicly available)

Additional Product Literature

Safety Data Sheets


Composite Polymers Mechanical Testing

Mechanical testing provides test data to characterize the mechanical integrity of molded resin castings, composites, laminates and sections of molded parts. The data is used to qualify materials for customer specifications, to help design materials for optimum end-use performance or to evaluate the effects of exposure environments on mechanical integrity. The material strength can be evaluated in a variety of deformations:

  • Tensile testing – measures the stiffness and strength of a material as it is being pulled apart in tension.
  • Flex testing – measures the stiffness and strength of a material as it is being deformed in three-point flexural bending.
  • Fatigue testing – applies to a cyclical load or strain to the sample and determines the resiliency or durability of the material by measuring the number of cycles to failure.

North America Resins and Gelcoat Technical and Analytical Services

Ashland’s global technology team includes skilled scientists, chemists, engineers and researchers who formulate specialty polymer products. With extensive experience in processes such as hand lay-up, spray-up and closed-molding processes such as infusion, resin-transfer molding, sheet-molding compounding, bulk-molding compounding, pultrusion and cured-in-place pipe, our development team can simulate the manufacturing environment in our world-class facility. This team then applies its specialty chemical expertise to customize polymers that enhance customers’ specific application needs. The team also offers chromatography, spectroscopy, microscopy, spectrometry, thermal analysis and mechanical testing services that validate and verify applications of its products to ensure quality control and safety.

Market Information



Product Types or Functions

General Manufacturing - Automotive
Exterior Body Panels, Exterior Unpainted Parts, Structural Parts
Resin and LPA system resin, UV-stabile resin-system resin
Transportation - Light Vehicles
Exterior Unpainted Parts
UV-stabile resin-system resin
Transportation - Medium and Heavy Trucks
Exterior Body Panels, Structural Parts
Resin and LPA system resin