A. Rigid PIR insulation foam
Soy and lignin additives matched the physical and mechanical properties of the conventional polyol while increasing mass loss under soil burial. The phosphorylated soy-additive additionally delivered flame-retardant performance comparable to — and on the reported measures better than — a conventional halogenated additive, which makes it directly relevant to TCPP replacement programmes.
B. Viscoelastic PUR foam
Soy-additive at 30% and 50% raised soil-burial mass loss steadily above the control across a 49-day exposure, with the higher loading tracking consistently ahead.
C. Non-cellular PUR elastomers and carpet backing
A soy-additive plus phosphate flame retardant blend replacing 20 parts of polyol and filler matched a Class I flame rating. Under 112 days of wastewater and landfill-condition exposure the material showed measurable degradation onset with mechanical properties substantially retained.
D. Silicone composites — heater hose
An ISO 14040/14044 LCA against EPDM showed a comparable per-unit carbon footprint and roughly a three-fold advantage once normalised to service life, with a hydrolysis breakdown pathway available to silicone that EPDM does not have. Silicon is the second most abundant element on the planet, and this route shows no trade-off between circularity and service life.
Related MCPU chemistry
The soy platform behind these results is the same reactive modifier family described on the products pages, and the flame-retardant work connects directly to the TCPP replacement problem page.