Low solvent, thermoplastic polyurethane containing solvent cement
US5562794A · kind A · utility
1Cited by
15References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 8, 1995 |
| Grant date | Oct 8, 1996 |
| Priority date | — |
| Expiry date | Mar 8, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/3158
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
There is now provided a solvent cement having a total of less than 80 weight percent of solvents and a thermoplastic polyurethane elastomer as at least one of the resins dissolved in the solvent. The solvent mixture contains at least a 5- or 6-membered water miscible lactone or lactam such as N-methyl-2-pyrrolidone (NMP) in an amount of 21 weight percent or less based on the weight of all the ingredients. The reduced solvent concentration assists in lowering VOC emissions while preserving the hydrostatic burst strength mechanical property required by ASTM D 2564-88.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.