Polyester Resins

Product Details:

Saturated Polyester Resin is a type of polyester polymer in which all reactive sites (unsaturations) are fully reacted—meaning it cannot undergo further polymerization like unsaturated polyester resins. It is primarily used in thermoplastic applications rather than in thermosetting composites like fiberglass.

1. Fully Saturated Molecular Structure:

   • No double bonds (C=C) in the backbone, so it does not cross-link like unsaturated polyester resin.

   • This makes it thermoplastic—it softens with heat and hardens on cooling.

2. Excellent Film-Forming Properties:

   • Produces tough, flexible, and glossy films.

   • Ideal for coatings, paints, and varnishes.

3. High Chemical and Weather Resistance:

   • Good resistance to moisture, chemicals, and UV exposure, depending on formulation.

4. Processable by Various Methods:

   • Used in powder coatings, coil coatings, plastic films, adhesives, and engineered thermoplastics.

   • Can be modified for solvent-based, water-based, or powder-based systems.

Product Details:

Sheet Grade Yellow Resin typically refers to a pre-pigmented polyester or epoxy resin specifically formulated for sheet molding or laminate applications, where consistent color, surface finish, and mechanical properties are critical. These resins are used in the production of colored FRP sheets, panels, or molded parts.

1. Pre-pigmented in Yellow:

   • The resin is factory-mixed with high-quality yellow pigments for uniform color throughout the sheet.

   • Designed to resist fading and maintain color consistency over time.

2. Sheet Grade Quality:

   • Optimized for lamination or compression molding processes, ensuring a smooth finish, minimal porosity, and good fiber wet-out.

3. Compatible with Fiberglass Reinforcements:

   • Works with chopped strand mats, woven rovings, or other fiberglass fabrics for structural strength.

4. Good Surface Finish:

   • Often includes additives to reduce air entrapment and improve flow for glossy, defect-free surfaces.

5. UV and Weather Resistance (if specified):

   • Especially important for outdoor FRP sheets (can include UV stabilizers).

6. Catalyst-Cured:

   • Uses a catalyst system (usually MEKP) to initiate curing.

• FRP wall panels for industrial or commercial buildings

• Roofing sheets

• Decorative panels for buses or cabins

• Electrical enclosures or covers

• Washroom or restroom partitions

• Construction formworks or protective barriers

Product Details:

GP Gelcoat Resin (General Purpose Gelcoat Resin) is a surface coating polyester resin used as the outermost layer in FRP (Fiber Reinforced Plastic) products. It provides a smooth, glossy, and durable finish that protects the underlying laminate and enhances the product’s appearance.

Key Characteristics of GP Gelcoat Resin:

1. General Purpose (GP) Grade:

   • Designed for standard applications where high-performance or specialty resistance (e.g., to chemicals or UV) is not critical.

   • More affordable than iso or vinyl ester gelcoats.

2. Surface Protection:

   • Acts as a barrier against moisture, abrasion, and weathering.

   • Prevents fiberglass fibers from being exposed or damaged.

3. Aesthetic Finish:

   • Provides color and gloss.

   • Can be pre-pigmented in various colors or left clear for later pigmentation.

4. Cures with Catalyst (MEKP):

   • Requires Methyl Ethyl Ketone Peroxide (MEKP) to harden.

   • Curing is exothermic and typically occurs at room temperature.

5. Brush, Spray, or Roller Application:

   • Formulated to be applied directly onto molds before laying fiberglass.

   • Thixotropic (non-drip) properties to prevent sagging on vertical surfaces.

Product Details:

Unsaturated Polyester Resin (UPR) is a thermosetting polymer widely used in composite materials like fiberglass-reinforced plastics (FRP). It is one of the most common resins due to its low cost, versatility, and good mechanical properties.

1. Contains Reactive Double Bonds (Unsaturation):

   • Can be crosslinked with a monomer (usually styrene) using a catalyst (MEKP – Methyl Ethyl Ketone Peroxide).

   • Hardens into a rigid, durable solid through free radical polymerization.

2. Thermosetting Resin:

   • Once cured, it cannot be melted or reshaped.

   • High heat and chemical resistance after curing.

3. Good Adhesion and Fiber Wet-Out:

   • Bonds well to glass fibers and fillers, forming strong composites.

   • Low viscosity allows easy penetration and wetting of reinforcement materials.

4. Economical:

   • Cheaper than epoxy or vinyl ester resins.

   • Widely available in various formulations (orthophthalic, isophthalic, etc.).

Product Details:

Fiberglass Mat is a type of reinforcement material made from glass fibers that are randomly distributed and bonded together to form a flexible, non-woven sheet. It is commonly used with resins (like polyester, vinyl ester, or epoxy) in composite manufacturing to build strong, lightweight, and durable structures such as boats, car parts, FRP panels, roofing sheets, and more.

1. Chopped Strand Mat (CSM):

   • Made of short strands (25–50 mm) of glass fiber randomly distributed.

   • Held together with a binder (emulsion or powder).

   • Excellent for hand lay-up and spray-up processes.

   • Commonly used with polyester resins.

   • Offers good conformability to complex shapes.

2. Continuous Filament Mat (CFM):

   • Made from continuous strands of fiberglass laid randomly.

   • Higher strength and better surface appearance than CSM.

   • Commonly used in automated or high-strength applications.

3. Needle Mat / Stitch Mat:

   • Compressed and mechanically bonded (no binder).

   • Good for insulation or acoustic applications.

Product Details:

ISO FR Resin stands for Isophthalic Fire Retardant Resin, a specialized type of unsaturated polyester resin that combines the chemical resistance and mechanical strength of isophthalic resins with fire-retardant additives for improved flame resistance and smoke suppression.

• ISO = Isophthalic Resin

  • Offers higher chemical resistance, thermal stability, and durability than general-purpose (orthophthalic) resins.

• FR = Fire Retardant

  • Formulated with halogenated compounds or ATH (aluminum trihydrate) to reduce flammability, smoke generation, and toxic emissions.

Product Details:

Clear Casting Resin is a transparent, pourable resin designed for making molded parts, artwork, jewelry, and encapsulations that require a crystal-clear, glass-like finish. It is typically made from epoxy, polyester, or polyurethane resins, each offering different performance characteristics depending on the application.