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CBT Resin Recycling

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Abstract-- Recycling CBT® Resins react to form a thermoplastic PBT that has five proven recycling methods, more than any thermosetting system and most thermoplastics.

CHEMICAL RECYCLING

1. Back to Cyclics - The PBT parts derived from CBT Resins can be treated with a catalyst in the presence of a solvent at elevated temperatures converting the PBT polymer matrix back to CBT Resins. Additionally, fillers and fibers can be collected, washed and subsequently reused.

2. Back to base chemicals - The PBT polymer matrix can readily be converted back to its base chemicals, dimethylterephthalate and butanediol, by treating the polymeric PBT at elevated temperatures and pressures with methanol in the presence of a catalyst, followed by purification via distillate methods. This process, known as methanolysis, is analogous to the recycling strategy developed for the recycle of PET. As above, the reinforcing fiber can be collected, washed and subsequently reused.

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Source: Cyclics Corporation

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