| 摘要 |
An isocyanic composition having an isocyanic functionality of between (15)% and (40)% and containing (5) to (75)% by weight of toluene diisocyanate optionally modified with a polyether polyol, (0) to (30)% by weight of diphenylmethane diisocyanate with a (4),(4)' to isomer content of greater than (40)% by weight, (10) to (70)% by weight of 2,4-toluene diisocyanate, (10) to (30)% by weight of MDI polymer of general formula (I): in which PHI represents a phenyl group and n is an integer greater than or equal to (1); and (5) to (30)% by weight of a phosphorus-based flame-retardant additive. |
