PISOX copolyesters
A high-barrier polyester that stays rigid above the temperature every other biobased polyester gives up at, and breaks down by design when its use life is over.
At an earlier stage than PICT and PEIF, and aimed at what the commercial grades cannot serve: parts that have to take heat, and parts that have to break down where they are used.
What it is.
Chemistry
Poly-isosorbide oxalate
Biobased content
60 to 100%, biobased or CO₂-based
Glass transition, Tg
100 to 167 °C, depending on composition
Barrier
High. PISOX-DEG blocks 35× more oxygen than PLA
Biodegradation
Home-compostable in a few months; degrades in seawater in under a year, tunable by composition
IP status
Two patent families, on the PISOX diols and the PISOX diacids
Stage
Grant-funded application development
Where it goes.
Pre-commercial. Any material can be made available from our own pilot plant at ~50 kg scale. If one of these applications is on your roadmap, the earliest conversations are the useful ones.
How it compares.
Biobased content
Glass transition
Stiffness
End of life
CO2 footprint
Stage
Show the glass transition chart
The ceiling, and what sits above itGlass transition temperature - where a plastic stops being rigid. PISOX is shown as a range, set by the comonomer
Where it is today.
2026
Application development under grant.
2027
Scale-up.
2028
Application development with partners.
2029+
Commercial roll-out.
PISOX is covered by two patent families, on PISOX diols and PISOX diacids. See the full patent estate and publications →
Tell us the application, and we will send the specifications.
We answer with the technical datasheet for PISOX, the grades available today, and what we can supply today.
