| 摘要 |
A composition for producing a polyurethane or polyisocyanurate rigid foam wherein the composition comprises at least one polyol, at least one isocyanate and an extender. The at least one polyol may comprise a polyisocyanurate which reacts with the isocyanate to produce polyisocyanurate rigid foam for use, particularly, in insulation application in walls and roofs. The extender used preferably comprises castor oil and the composition also preferably includes a reinforcing material which may be a fibre-reinforcing material or a particle reinforcing material. |
