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Molding Compounds and Resins

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About Molding Compounds and Resins

Molding compounds and resins are industrial plastics and polymers that are suitable for forming. They are available as pellets, liquids, and powders and are used in processes such as injection molding, compression molding, reaction injection molding (RIM), resin transfer molding (RTM), and blow molding. Examples of molding compounds and resins include thermoset resins, gel elastomers, encapsulants, potting compounds, composites, and optical grade materials. Electrically conductive molding compounds and resins provide low resistivity and are used to prevent electrostatic discharge (ESD), electromagnetic interference (EMI), and radio frequency interference (RFI). Dielectric compounds and insulation materials are also available. Thermally conductive products are applied between a heat-generating electrical device and a heat sink. Dampening products form layers that can bend or flex without cracking or delaminating. Film grade, extrusion grade, and flame retardant molding compounds and resins are also available. 

Molding compounds and resins use many different chemical systems and filler materials. Some chemical systems contain acetals, acrylics, elastomers, natural or synthetic rubbers, epoxy resins, silicone compounds, vinyl systems, polyamides, polyimides, ketones, or styrenes. Other chemical systems contain bismaleimide (BMI) resins, cellulosic or cellulose compounds, cyanoacrylates, ionomers, ethylene copolymers, fluoropolymers, or liquid crystal polymers (LCPs). Commonly used chemical systems also include polybutadiene, polycarbonate (PC), polyethylene (PE), polyester, polyether block amide (PEBA), polyetherimide, polyolefin, polypropylene (PP), polypropylene oxide (PPO), polysulphide, polyphthalamide (PPA), and polyurethane (PU, PUR). For filler materials, some molding compounds and resins contain aramid, chopped, or wound fiber; carbon or graphite powder; or self-lubricated materials. Other products contain glass fillers, metal fillers, or inorganic compounds. Unfilled products are also available. Typically, these raw materials are used as starting components for the production of finished adhesives and compounds.

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Products & Services Related to Molding Compounds and Resins

Conductive Adhesives and Compounds
Conductive adhesives and compounds provide an electrically and/or thermally conductive path between components.
Conformal Coatings
Conformal coatings encapsulate circuit boards and their electronic components in order to prevent the ingress of moisture, fungus, dust and other environmental contaminants.
Epoxy Adhesives
Epoxy adhesives are chemical compounds for joining components. They require clean surfaces and are valued for their toughness and resistance to chemical and environmental damage.
Gel Elastomers
Gel elastomers are highly viscoelastic polymer gel materials that have excellent shock absorption and damping characteristics. They are available in a variety of material types and grades.
Pressure Sensitive Adhesives (PSA) and Contact Adhesives
Pressure sensitive adhesives (PSA) and contact adhesives adhere to most surfaces with very slight pressure. They are available in solvent and latex or water-based forms.
Silicone Adhesives and Sealants
Silicone adhesives and sealants have a high degree of flexibility and a very high temperature resistance (up to 600° F), but lack the strength of other epoxy or acrylic resins.
Thermoplastics and Thermoplastic Materials
Thermoplastics and thermoplastic materials soften when heated and harden when cooled. They can withstand many heating and cooling cycles and are often suitable for recycling.

Other Topics You Might Be Interested In

  • Allyl
    Esters in the allyl family consist principally of diallyl phthalate (DAP) and diallyl isophthalate (DAIP). Both are used as monomers and as prepolymers, which are readily converted to thermoset...
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  • Phenolic Resins
    Phenolic resins are thermosetting molding compounds and adhesives that offer strong bonds and good resistance to high temperatures. Phenolic or phenol formaldehyde, urea formaldehyde, furan and...
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  • Two-part Casting Resin
    Two-part casting resins are plastic or elastomer compounds used to cast parts, molds or form a structure in place. They are available in the form of spray foams, "froth-packs", and A + B pourable...
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Engineering Web: Molding Compounds and Resins

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RTP Company - Your Global Compounder of Custom Engineered...
Engineered Plastic Compounds Specialty thermoplastic compounds from RTP Company provide conductive, structural, wear
See RTP Company Information
Shuman Plastics Thermoplastic Materials, Compounds & Resins
Dyna-Purge® high-performance purging compounds to clean injection molding, extrusion, compounding and blow molding equipment.
See Shuman Plastics, Inc. Information
ASTM D704 -99(2004) Standard Specification for...
covers compression molding, thermosetting, melamine-formaldehyde molding compounds, resin binder, with or without other resins, intimately combined
See ASTM International Information
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