Thermoplastic polyurethanes prepared with small amounts of monohydric alcohols
US4098772A · kind A · utility
68Cited by
5References
8Claims
0Family size
Assignee
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Key dates
| Filing date | Mar 11, 1976 |
| Grant date | Jul 4, 1978 |
| Priority date | — |
| Expiry date | Mar 11, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S264/77
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The processing temperatures of thermoplastic polyurethane elastomers are reduced, and the extrudability and the sensitivity to degradation by shear and by moisture are improved, by including a minute proportion (from 0.0005 to 0.05 equivalents, per equivalent of isocyanate) of a monohydric aliphatic alcohol in the reaction mixture (diisocyanate, polymeric diol and difunctional extender) employed to prepare thermoplastic polyurethane elastomers by the one-shot procedure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.