Formulation

KOH-value [g·kg⁻¹ KOH]

Chain extender

Isocyanate

Cross-linking agent

Blowing agent

ω_Recyclate [wt-%]

P1

486^*

1,4-Butandiol

HDI-Biuret

Glycerin

Water

13.2

P2

486^*

1,4-Butandiol

P-MDI

Glycerin

Water

14.3

P3

486^*

Castor oil

HDI-Biuret

Glycerin

Water

22.4

P4

653^**

1,4-Butandiol

HDI-Trimer

-

-

10.0

P5

653^**

1,4-Butandiol

HDI-Trimer

-

-

20.0

P6

653^**

1,4-Butandiol

HDI-Trimer

Glycerin

-

20.0