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AOC is the Leading Global Supplier of Resins, Gel coats, Colorants
and Materials for the Composites
Industry

 

SMC-BMC

AOC takes sheet molding compounds (SMC) and bulk molding compounds (BMC) to the highest levels of performance and cost-effectiveness. Technologies include Atryl® TCA automotive resins for producing Class A exterior panels with extraordinary resistance to the development of surface imperfections. BMC applications that benefit from AOC technology include headlamp reflectors and components for appliances, electrical equipment and consumer products. Chroma-Tek® technologies include pigment dispersions and thickening dispersions, B-sides and C-sides for molding compounds. By integrating these technologies with superior SMC and BMC resins, AOC delivers exceptional chemical systems that translate into improved profitability

SMC-BMC RESINS

Tough Class A SMC

ATRYL® S335-63

AOC's Atryl S335-63 is designed to produce SMC Class A automotive and truck parts with excellent surface quality.

Applications

  • Class A Automotive Parts
  • Class A Truck Parts

Benefits

  • Consistent thickening for SMC applications
  • Paintable, coatable and bondable

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High Reactivity PG Maleate

ATRYL® S342

Atryl S342 is a high reactivity PG maleate polyester resin for closed mold processing. Molecular weight distribution is tightly controlled to yield consistent results during processing and in final part performance. S342 can be combined with a wide variety of low profile additives to yield excellent surface aesthetics.

Applications

Proven performance in SMC, BMC and pultrusion applications.

Benefits

  • High reactivity
  • Precise molecular weight distribution
  • Low color
  • High gloss and excellent surface smoothness
  • Designed for demanding cure and surface requirements, such as short press cycle times and thin laminate pultrusion
  • Allows high filler loadings with workable mix viscosities

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Multi-Purpose Orthophthalic

ATRYL® S536-66

Atryl S536-66 is a high reactivity polyester resin for closed mold processing. Molecular weight distribution is tightly controlled to yield consistent results during processing and in final part performance. S536-66 can be combined with a wide variety of low profile additives to yield excellent surface aesthetics.

Applications

Proven performance in SMC, BMC and RTM applications

Benefits

  • High reactivity
  • Medium viscosity
  • Allows high filler loadings yet workable mix viscosities

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Multi-Purpose DCPD Polyester Resin

S905

Atryl S905 is an un-promoted, high reactivity dicyclopentadiene (DCPD) polyester resin designed for a variety of closed mold applications.

Applications

  • Automotive and truck parts
  • Sports equipment
  • Tub and shower applications

Benefits

  • High reactivity DCPD chemistry
  • Proven performer in a multitude of closed mold processes
  • Computer controlled manufacturing provides consistent end-use performance and reduced scrap rates

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Low Molecular Weight/Low Viscosity

T341

T341 is a low-molecular weight / low-viscosity PG maleate resin. The T341 can be combined with a wide variety of low profile additives to yield excellent surface aesthetics.

Applications

Proven performance in SMC, BMC and pultrusion applications.

Benefits

Designed for demanding cure and surface requirements including short press cycle times and thin pultrusion laminates. Allows high filler loadings at workable mix viscosities.

PDF Version

High Reactivity Isophthalic Polyester Resin for Closed Mold Processing

T766

AOC's T766 is an unpromoted high reactivity isophthalic polyester resin. T766's polymer backbone was designed to capture a wide array of desirable properties for both the molder, fabricator and the end user.

Applications

AOC's T766 performs well in a variety of closed mold processes and offers benefits in mechanical and electrical properties.

Benefits

Processability
Suitable for a wide variety of closed mold processes including SMC, BMC and pultrusion.

Adaptability
Versatile in allowing engineers and designers to meet a broad spectrum of applications.

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Structural Resin System for Compression Molding

S081-700P

AOC's S081-700P resin system is a unique polyester/vinyl ester hybrid. It is specially formulated for structural SMC applications that require higher mechanical properties when exposed to a hot or corrosive environment.

Applications

  • Radiator supports
  • Cross-vehicle beams
  • Valve covers/oil pans
  • Fuel tank heat shields
  • Windshield wiper cowl plenums

Benefits

  • Performs like a vinyl ester.
  • Chemically thickens with the ease and consistency of a polyester
  • Physical performance superior to conventional polyesters
  • Excellent property retention at elevated temperatures

PDF Version

S903-501

AOC's S903-501 polyester resin is a mixture of a highly reactive polyester resin, low profile additives and styrene. It is designed for use in compression molding applications, especially SMC applications. It can be used in Class A automotive systems and can be formulated to work in low pressure applications.

Applications

  • Truck and automotive parts
  • Recreational equipment

Benefits

  • Consistent thickening for SMC applications.
  • Provides smooth surface and dimensional control (Expansion System).
  • Paintable, coatable and bondable.

PDF Version

Low Shrink/Low Profile Additives

Rubber-Modified Polystyrene Shrink Control Additive

N114

AOC's N114 Shrink Control Additive is a rubber-modified polystyrene based additive that has been thinned in styrene. N114 is intended to reduce shrink in high reactive polyester resins designed for Sheet Molding Compound (SMC) and Bulk Molding Compound (BMC) applications.

Applications

  • Electrical Housings and Applications
  • Consumer Goods
  • Construction Applications
  • Automotive Applications

Benefits

  • Low Shrink Additive
  • Suitable in pigmentable applications
  • Less shrink than standard poly styrene systems

PDF Version

Polyvinyl Acetate

N640

N640 Low Profile Additive is a PVA polymer that has been thinned in styrene. N640 is intended to reduce shrink in high reactive polyester resins designed for Sheet Molding Compound (SMC) and Bulk Molding Compound (BMC) applications.

Applications

  • Appliances
  • Automotive parts
  • Consumer goods

Benefits

  • Low Shrink Additive
  • Suitable in pigmentable applications
  • Less shrink than standard poly styrene system

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Poly (methyl methacrylate)

N700

N700 Low Shrink Additive is a general purpose acrylic that has been thinned in styrene. N700 is intended to reduce shrink in high reactive polyester resins designed for Sheet Molding Compound (SMC).

Applications

  • Appliances
  • Automotive parts
  • Consumer goods

Benefits

  • Suitable for paintable and bondable applications
  • Provides smooth surface and dimensional control (Zero-shrink to expansion capable)

PDF Version

Polystyrene

N714

AOC's N714 Shrink Control Additive is a general purpose polystyrene based additive that has been thinned in styrene. N714 is intended to reduce shrink in high reactive polyester resins designed for Sheet Molding Compound (SMC) and Bulk Molding Compound (BMC) applications.

Applications

  • Cookware
  • Electrical Housings and Applications
  • Consumer Goods

Benefits

  • Low Shrink Additive
  • Suitable in pigmentable applications
  • When combined with proper unsaturated polyesters, can be used in SMC/BMC applications that comply with FDA criteria.

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Saturated Polyester

S154-60

S154-60 Low Shrink Additive is a saturated polyester resin. S154-60 is intended to reduce shrink in high reactive polyester resins designed for sheet molding compound (SMC) and Build Molding Compound (BMC) applications.

Applications

  • Appliances
  • Automotive Parts
  • Consumer Goods

Benefits

  • Suitable for paintable and bondable applications
  • Provides smooth surface and dimensional control (expansion capable.)

PDF Version

SMC Thickeners

Magnesium Oxide Dispersion

CTB-01225

AOC's CTB-01225 is a thickener dispersion for polyester and vinyl ester SMC/BMC systems. Useful ranges depend on the application.

Application

CTB-01225 can be mixed with other materials, such as pigment dispersions, to create a B-side product.

PDF Version

CTB-7170

AOC's CTB-7170 is a thickener dispersion for polyester and vinyl ester SMC/BMC systems. Useful ranges depend on the application

Application

CTB-7170 can be mixed with other chemicals to create a B-side product.

PDF Version

SMC-BMC Case Histories SMC-BMC Literature

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