Bio-Based Polyols from Seed Oils for Water-Blown Rigid Polyurethane Foam Preparation

Table 2

Water-blown RPUR foams formulation.

Ingredients	Amount (pbw)
Polyols	100
Seed oil-based polyols
Polyether polyols (Raypol® 4218)
Catalyst (DMCHA)	1.0
Blowing agent (distilled water)	3.0
Surfactant (TEGOSTAB® B8460)	2.5
PMDI (Suprasec® 5005)	NCO index 175

The amounts of ingredients were calculated to be parts per 100 wt% of polyols.
NCO index refers to the excess amount of PMDI used over the theoretical equivalent amount which is required, expressed in percentage terms [1].