Thermoplastic polyurethane resin having isocyanate end groups and containing ethylenic side groups
US4367302A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 30, 1981 |
| Grant date | Jan 4, 1983 |
| Priority date | — |
| Expiry date | Apr 30, 2001 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09J175/14
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The invention relates to new crosslinkable thermoplastic polyurethane resins having isocyanate end groups and containing ethylenic side groups. According to the invention, the polyurethane resins result from the reaction of: PA0 (a) an organic diisocyanate, PA0 (b) a saturated diol and PA0 (c) an unsaturated diol of the formula: ##STR1## in which R.sub.3 =Me or H and n is an integer between 1 and 4. 2,3-Dihydroxypropyl acrylate will preferably be used. Application to glues, in particular for lamination with the aid of a two-step glueing process which consists, in a first step, in crosslinking the acrylic bonds in order to increase the tack of the film, and then in crosslinking the NCO groups.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.