Updated December 2020
Poly(alkylene carbonates) are synthesized through the polymerization of carbon dioxide and epoxides. The products of their combustion are carbon dioxide and water vapor, which are non-toxic, non-flammable, and environmentally safe. They burn cleanly in any environment, oxidizing or inert. They are colorless, amorphous thermoplastic polymers with low glass transition temperatures.
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QPAC® Organic Binders - Ideally Suited to the Electronic Industry
QPAC® organic binders are ideally suited to electronic applications as a processing/organic/casrificial binder for ceramic, metal and cermet powders. This includes pressing, sintering and injection molding operations to fabricate tapes, electronic pastes and parts.
The Benefits of Using QPAC25® and QPAC40® Organic Binders
The benefits of using QPAC25® and QPAC40® organic binders includes the following:
- Decomposition at low temperature. QPAC® decomposes completely between 220°C - 340°C, which can be 100°C or more below the decomposition temperatures of other binders.
- Decomposition can occur in a wide range of atmospheres including air, oxygen, nitrogen, hydrogen, argon and vacuum.
- Upon decomposition, QPAC® leaves less than10 ppm ash residue with the complete burn-out of carbon.
- QPAC® is soluble in many common solvents.
- The controlled polymer debinding process allows for improved part structure and pore size management.
- The use of QPAC® as a binders allow for parts with excellent green strength and density.
- QPAC® has excellent film-forming and coating capabilities.
QPAC® has superior binder burn-off characteristics compared to other materials. With the trend toward miniaturization of electronic components, these features are more important than ever.
Available Product Forms of QPAC25® and QPAC40® Organic Binders
The QPAC25® and QPAC40® organic binders are available in various forms such as:
- Powder
- Pellets
- Granulates
- Solution
- Aqueous Emulsion
Properties of QPAC25 and QPAC40 Organic Binders
The properties of QPAC25® and QPAC40® are outlined in the following table.
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QPAC®25 - PEC - polyethylene carbonate
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Density
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1.42
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Chemical formula
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[CH2CH2OCO2]n or C3H4O3
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Tensile strength
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500 - 1,500 psi
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Solvents
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Methylene chloride, Chloroform, and 1,2-Dichloroethane
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Tg
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25°C
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QPAC®40 - PPC - polypropylene carbonate
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Density
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1.26
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Chemical formula
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[CHCH3CH2OCO2]n or C4H6O3
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Tensile strength
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5,000 - 6,000 psi
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Solvents
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Methylene chloride, MEK, Acetone & Propylene carbonate
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Tg
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40°C
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This information has been sourced, reviewed and adapted from materials provided by Empower Materials.
For more information on this source, please visit Empower Materials.