Method for adhering a polyurethane to a polymeric substrate
US6048619A · kind A · utility
0Cited by
5References
22Claims
0Family size
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Key dates
| Filing date | Mar 20, 1998 |
| Grant date | Apr 11, 2000 |
| Priority date | — |
| Expiry date | Mar 20, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31551
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Method of bonding a polyurethane surface to a polyvinyl chloride or other polymer substrate containing surface moisture, particularly useful for making chip cards. A resin comprising a polyol and a diisocyanate is placed on the substrate, followed by pressing, in the presence of a tertiary amine catalyst able simultaneously to catalyze the reaction of the polyol with the diisocyanate to form a polyurethane network and the reaction of the surface moisture with the diisocyanate to convert water molecules into polyurea.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.