Adhesive composition
US4125522A · kind A · utility
34Cited by
10References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 26, 1978 |
| Grant date | Nov 14, 1978 |
| Priority date | — |
| Expiry date | Jan 26, 1998 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G2410/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A polyurethane adhesive, suitable for bonding of shoe uppers to shoe soles, is based on an isocyanateterminated prepolymer made from tolylene diisocyanate, a poly(tetramethyleneoxy) glycol, and a poly(ethyleneoxy) compound having 7-30 ethyleneoxy groups and 1 or 2 hydroxyl groups. This prepolymer can be cured with a mixture of a methylenedianiline/sodium chloride complex with urea at a temperature of 70.degree. C, which is safe for the usual shoe materials. Adhesive compositions containing both the prepolymer and the curing agent have at room temperature a potlife of at least 24 hours.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.