Hot-melt adhesives.

摘要

The invention relates to crystalline hot-melt adhesives containing isocyanate groups and based on

  70 - 95% by weight of a prepolymer A based on polyester-diols having a molecular weight of from 1,500 to 10,000 and melting points of from 50 to 90 DEG C, and diisocyanates in a ratio between the isocyanate groups of the diisocyanate and the hydroxyl groups of the polyester-diol of from 3:1 to 1.2:1, and
  5 - 30% by weight of a component B having a molecular weight of from 1,000 to 10,000 and based on polyesters having melting points of from 60 to 150 DEG C,
where component B contains at most up to 0.5 Zerewitinoff-active groups per molecule.