Polyester / Vinyl Ester Resins
Unsaturated polyester and vinyl-ester matrices for volume GFRP, distinct from epoxy resin.
Overview
Unsaturated polyester and vinyl-ester resins are the default matrices for automotive GFRP — the actual chemistry in most SMC, BMC, RTM and spray-up glass parts. Vinyl ester adds toughness and chemical resistance for more demanding parts. Epoxy Resin already exists as the high-performance composite matrix and adhesive. This page is the polyester/vinyl-ester pair used for volume glass composites, not epoxy prepreg. Supplied as liquid resins, often styrene-containing, and cured with peroxide systems. They are thermosets, not thermoplastics, and are not readily recyclable.
Automotive Applications
Similar Materials
Basalt Fibre Composites
Mineral Fibre Composite
Mineral-fibre composites based on basalt, used as a glass-adjacent reinforcement with a different sustainability and temperature story.
Advanced Thermoplastic Resins
Thermoplastic Resin
High-performance thermoplastic resin systems (e.g. PA, PPS, PEEK, PEKK) used for structural and under-bonnet components requiring thermal and chemical resistance.
Crash-Durable Epoxy Adhesive
Structural Adhesive
Toughened BIW structural epoxy for mixed-material crash joints, distinct from epoxy resin matrix.
EPP Foam
Energy-Absorber Foam
Expanded polypropylene energy-absorber foam for bumper cores, distinct from PU and acoustic foams.
Properties
Category
Type
Thermoset Resin
Available Forms
Key Properties
- Volume GFRP matrix
- Vinyl ester for tougher duty
- Peroxide-cured thermoset
- Distinct from Epoxy Resin
- Not a thermoplastic
- Liquid resin supply