Organic Binders - The Benefits of QPAC25® and QPAC40®

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QPAC® polyalkylene carbonates copolymers are a unique family of innovative thermoplastics representing a true break-through in polymer technology. While traditional plastics have been primarily petroleum based, these materials are derived from carbon dioxide and are produced through the copolymerization of CO2 with one or more epoxides. The resultant polymers are amorphous, clear, readily processible, and have long-term mechanical stability. They are also environmentally friendly by consuming 50% fewer petrochemicals, as compared to other polymers which are 100% petrochemical based. In addition, they may exhibit biodegradable properties consistent with an environmentally friendly binder.

Thermogravimetric analyses in both air and nitrogen show complete decomposition of polypropylene carbonate at low termperatures, heating rate is 10°C/minute.

Thermogravimetric analyses in both air and nitrogen show complete decomposition of polypropylene carbonate at low termperatures, heating rate is 10°C/minute.

QPAC® 25, polyethylene carbonate, and QPAC® 40, polypropylene carbonate, are the two most widely used products within our family of organic binders. However, there are a wide range of QPAC® polymers possible by varying the epoxide monomer or using blends of epoxides to produce a specific reaction. Our technical group has the expertise to effectively work with you to develop the appropriate product for your application.

Advantages of QPAC Organic Binders

The following is a short list identifying some of the advantages of QPAC®. However, the advantages that our customers see goes well beyond those listed below.

Benign emissions

Water and CO2

Low temperature / clean burnout

Onset at 220°C, complete at 340°C

Virtually no residue

Less than .10 ppm residue ash and metal

All sintering atmospheres

Nitrogen, Oxygen, Argon, vacuum (oxygen generated in debind)

Controlled debind

Polymer chain unzipping means controlled migration of debind emissions through the part. Also results in excellent pore size management.

Excellent green strength

Tacky, high molecular weight, amorphous thermoplastic polymer allows high density green shapes, tapes, films and other structures

Typical Applications of QPAC Organic Binders

QPAC® polymers can be processed using typical processing techniques, including solution processing, spin casting, injection molding or extrusion. This family of copolymers has attractive performance characteristics in a variety of applications. The following table shows some of these applications and QPAC®'s benefits:

Application

Benefits

End Use/Industry

Electronic ceramic binders

  • Improve green strength and lubricity
  • Complete burnout at low temperature in any firing atmosphere Low ash content

Electronic/technical ceramics, powder metals

Technical glass binders

  • Compatible with a variety of sealing glasses
  • Complete decomposition Low ash content

Display screens, discharge lamps, glass preforms

Brazing solutions

  • Compatibility with a variety of filler metals
  • Viscosities are custom-tailored for solution or paste requirements

Automotive, HVAC, aircraft

Diamond cutting tools

  • Coats diamond powders evenly
  • Decomposition is uniform and controlled reducing the likelihood of cracks and voids in the final part

Construction, cutting tools

Energenics

  • Decomposition is uniform and controlled
  • Flame temperatures are noticeably reduced during combustion

Propellants, pyrotechnics, airbag inflators

Pore formers

  • Decomposes completely by 340°C in any environment
  • Amorphous thermoplastic which will solubilize completely and homogeneously

Mesoporous carbon composites, titanium structures, nanomaterials

Polymer foaming aids

  • Reduced density of high temperature thermoplastics
  • Environmentally acceptable Low temperature decomposition

Engineering thermoplastics for numerous industries

Lost foam casting

  • Complete burnout Minimal carbon residue

Metal castings, foundries, aluminum, iron

Industries Utilizing QPAC Organic Binders

Typical industries that use QPAC organic binders include:

  • Electronic Passive Components
  • Brazing Pastes
  • Technical Glass
  • Fuel Cells
  • Tooling Manufacturers
  • MEMS

This information has been sourced, reviewed and adapted from materials provided by Empower Materials.

For more information on this source, please visit Empower Materials.

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