Flexible polyurethane rebond foam having improved tear resistance and method for the preparation thereof
US5290818A · kind A · utility
13Cited by
5References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 11, 1992 |
| Grant date | Mar 1, 1994 |
| Priority date | — |
| Expiry date | Dec 11, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S264/07
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Rebond polyurethane foams can be prepared by coating shredded polyurethane foam with a prepolymer binder formulation which includes toluene diisocyanate distillation bottoms, compressing the binder coated foam, and the curing the binder with steam. The toluene diisocyanate distillation bottoms can be used in place of more expensive prepolymer formulation components such as toluene diisocyanate or methylene diphenyldiisocyanate. The toluene diisocyanate distillation bottoms can also improve elongation and tear resistance properties of the resultant rebond foams prepared therewith.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.