The Use of Biodiesel Residues for Heat Insulating Biobased Polyurethane Foams

Table 1

Preparation amounts of PUF samples.

Polyol mixture	Polyether polyol	100%	90%, 70%, 50%, 20%	90%, 70%, 50%, 20%	90%, 70%, 50%, 20%
	Glycerol		10%, 30%, 50%, 80%	10%, 30%, 50%, 80%	10%, 30%, 50%, 80%
	Surfactant	1%	2%	1,5%	1%
	Catalyst	0,4%	0,4%	0,4%	0,4%
	Cocatalyst	0,4%	0,4%	0,4%	0,4%
	Water	2,5%	2,5%	2,5%	2,5%
Diisocyanate	NCO/OH ratio	1,08	1,08	1,08	1,08
Mixing speed	rpm	1500	1000	1500	1500
Mixing time	(s)	12	8	12	15