Resins for composites and FRP manufacturing
RV NEORESINS supplies and develops composite resins for fibre-reinforced parts, industrial components, tanks, pipes, profiles, swimming pools, sanitary ware and engineered surfaces.
We work mainly with unsaturated polyester and vinyl ester resins, selected according to the manufacturing process, the reinforcement used and the mechanical, thermal or chemical performance required from the finished part.
Selecting the resin according to process and application
Composite resin selection should not be based solely on gel time. Viscosity, fibre wet-out, reactivity, shrinkage, thixotropy and curing behaviour directly affect laminate quality and process stability.
The type of mould, part thickness, amount and orientation of the reinforcement, working temperature and subsequent service conditions must also be considered.
Unsaturated polyester resins
Polyester resins are a versatile solution for many composite manufacturing processes. We offer orthophthalic, isophthalic and DCPD formulations with different levels of viscosity, reactivity and thixotropy.
Orthophthalic polyester for general-purpose applications
Orthophthalic resins are used in general-purpose FRP parts, hand laminates, moulded elements and components that require a suitable balance between processability and mechanical performance.
Isophthalic polyester for more demanding requirements
Isophthalic formulations are selected when the application requires improved mechanical, thermal, water or chemical resistance. Suitability must be checked with regard to concentration, temperature and exposure time.
DCPD resins for productivity and emission control
DCPD-based resins can be formulated to provide good wet-out, thixotropic behaviour and lower volatile emissions during certain moulding operations. They are suitable for various industrial parts, automotive components and cooling towers, among other applications.
Vinyl ester resins for chemical and thermal resistance
Vinyl ester resins are used in composites exposed to chemicals, high temperatures or greater mechanical loads. Their structure combines good processability with resistance to selected acids, alkalis, salts, solvents and corrosive environments.
They are used in chemical engineering, tanks, pipes, infrastructure, marine, automotive and wind-energy applications, coatings and special FRP parts.
Selection must be based on the specific chemical medium, its concentration, service temperature and exposure duration. For critical applications, the system should be validated with a representative test.
Composite manufacturing processes
Hand lay-up and spray-up
Hand lay-up and spray-up processes require a viscosity that facilitates fibre impregnation without excessive run-off. Working time must allow the laminate to be consolidated and air to be removed before curing progresses.
Vacuum infusion and closed moulding
Vacuum infusion requires careful control of low viscosity, mixture stability and a sufficient working window to complete mould filling. Part design, reinforcement permeability and temperature affect the resin flow rate.
RV NEORESINS can study formulations and curing cycles adapted to part size and actual process conditions.
Pultrusion of profiles and rods
Pultrusion requires stable resins with good reinforcement impregnation and reactivity compatible with the pulling speed and mould temperature. These formulations are intended for rods, profiles and other continuous fibre-reinforced elements.
Filament winding
Filament winding uses resins with good fibre wet-out, suitable mechanical behaviour and resistance to the service environment. The process is used to manufacture pipes, tanks and FRP components exposed to pressure or corrosive environments.
Industrial applications
Tanks, pipes and cooling towers
These parts require a combination of mechanical strength, leak tightness, reinforcement wet-out and chemical compatibility. The resin must be selected according to the contained fluid, temperature and operating conditions.
Marine industry and marine applications
Marine formulations must provide good fibre impregnation and suitable behaviour in water and the service environment. They can be used in moulded components, auxiliary structures and other composite elements.
Swimming pools, bathtubs and sanitary ware
Swimming pools, bathtubs and sanitary parts use resins with process-adapted viscosity and reactivity, good glass-fibre wet-out and adhesion to acrylic substrates or ABS composites when required by the part construction.
Automotive and industrial parts
Automotive parts, housings, covers and technical components can be manufactured by laminating, moulding or closed processes. The formulation is adjusted according to thickness, finish, production cycle and required properties.
Solid surface, engineered marble and compact quartz
Resins for engineered surfaces must accept a high mineral-filler loading, facilitate deaeration and maintain controlled reactivity. They are used to manufacture worktops, washbasins, bathtubs, engineered marble and other solid-surface elements.
For compact quartz slabs, viscosity and reactivity must be adapted to each manufacturer’s mixing, compaction and curing system. Particle-size distribution, filler content and subsequent finishing must also be considered.
Variables we can adapt
Depending on the product and process, we can study adjustments to:
- Viscosity and impregnation capacity.
- Thixotropy and sag resistance.
- Gel time, peak time and curing speed.
- Reactivity at ambient temperature or in thermal cycles.
- Compatibility with fibreglass, fillers and pigments.
- Resistance to water, heat or specific chemical media.
- Behaviour during demoulding and subsequent finishing.
Epoxy resins for specific applications
When a project requires low shrinkage, high adhesion or specific mechanical performance, we can also study epoxy systems for composites. Hardener selection allows working time, curing cycle and final properties to be adjusted.
Technical development and industrial validation
RV NEORESINS analyses the manufacturing method, reinforcement, equipment, production cycle and service conditions of the part. From this information, we propose a formulation and a test plan using representative materials and conditions.
If you need to select a resin for laminating, infusion, pultrusion, winding or engineered-surface manufacturing, contact RV NEORESINS and describe the process, the part and the performance you require.