Rigid foams for housing insulation require to meet certain flammability
standard and also cost requirements. It is possible to be
environmentally sound by using recycle PET in the preparation of the
foam.
Formulation Isocyanurate Spray foam Carbon dioxide
and HCFC blown
Aromatic polyester diol from recycled polyethylene
terephthalate
Lead octoate can be replaced with an
environmentally more acceptable catalyst such as Bismuth
octoate
The isocyanurate formation in the foam will depend on temperature
and catalyst concentration. At lower temperature the catalyst might
have to be increased.
Last edited on:
November 16, 2006
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