Patent · US Active

Reactive polyurethane-hot melt adhesive having a low isocyanate-monomer content

US7741425B2 · kind B2 · utility

4Cited by

2References

26Claims

0Family size

Assignee

SIKA TECHNOLOGY AG · CH

Inventors

Urs Burckhardt · Zürich, CH
Kai Paschkowski · Jork, DE
Martin Linnenbrink · Buxtehude, DE
Doreen Janke · Leck, DE

Key dates

Filing date	Sep 29, 2006
Grant date	Jun 22, 2010
Priority date	—
Expiry date	Jun 7, 2027

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC09J175/12
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The invention relates to relates to moisture-hardened hot melt adhesive which contains at least one polyurethane polymer of formula (I) which comprises aldimine groups and which is solid at room temperature, in addition to at least one polyurethane polymer P which comprises isocyanate groups, if q in formula (I) represents zero, or if X in formula (I) represents N—R8 with R8 as a substituent of formula (III). The compositions are characterised in that contain visibly less isocyanate monomers and are therefor particularly advantageous from a work-hygiene point of view.

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