Patent · US Active

Adhesives

US12421434B2 · kind B2 · utility

0Cited by

0References

12Claims

0Family size

Assignee

Covestro Deutschland AG · DE

Inventors

Joerg Buechner · Bensberg, DE
Harald Kraus · Leverkusen, DE
Thomas Fait · Troisdorf, DE
Wolfgang Arndt · Dormagen, DE

Key dates

Filing date	May 9, 2022
Grant date	Sep 23, 2025
Priority date	—
Expiry date	Sep 12, 2042

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G2250/00
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The present disclosure relates to an aqueous dispersion containing at least one semicrystalline polyurethane-polyurea polymer and at least one surface-deactivated polyisocyanate. The melting temperature of the semicrystalline polyurethane-polyurea polymer is at least 55° C. The disclosure also relates to a process for preparing the aqueous dispersion, the use of the aqueous dispersion for producing coated substrates or adhesive films, flat or three-dimensional substrates coated with the aqueous dispersion, a substrate coated with at least one semicrystalline polyurethane-polyurea polymer and at least one surface-deactivated polyisocyanate, an adhesive film including at least one semicrystalline polyurethane-polyurea polymer and at least one surface-deactivated polyisocyanate, and a dried adhesive film obtained from such an aqueous dispersion.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.