Cryogenic adhesives made from epoxy terminated urethanes
US5484853A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 28, 1993 |
| Grant date | Jan 16, 1996 |
| Priority date | — |
| Expiry date | Jul 28, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G59/50
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A two-part adhesive composition having superior adhesive strength at cryogenic temperatures contains a urethane resin composition part and a hardener part. The urethane resin composition part comprises 50 to 99% by weight of a modified polyurethane prepolymer having an epoxy group at each of its respective ends and 1 to 50% by weight of a modified urethane compound having substantially no ether cyanate (NCO) groups and at least two epoxy groups per molecule and a molecular weight of less than 800 daltons. The hardener part is a polyamine containing primary or secondary amine groups. The equivalent ratio of the amine groups of the polyamine to the epoxy groups of the urethane resin composition part is 0.5 to 2.0.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.