Although, in principle, it is intended that all of the isocyanate functionality of the polyisocyanate be reacted, it should be understood that 100 percent complete reaction cannot always be attained.

• 虽然原则上希望所有聚异氰酸酯的异氰酸酯官能度皆可反应,但应了解100%25完全反应并非总能达到。