Elastomeric systems having unusual memory characteristics
US4193899A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 29, 1977 |
| Grant date | Mar 18, 1980 |
| Priority date | — |
| Expiry date | Nov 29, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S524/921
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
This invention involves a process for the utilization of an unusual memory characteristic which is present in neutralized sulfonated elastomeric materials, wherein the process includes the steps of distorting or compressing the neutralized sulfonated elastomeric article, then heating the article to a selected elevated temperature, holding the article at the elevated temperature for a limited time while maintaining the distorted shape, cooling the article to near room temperature, and releasing it from the device used to compress or distort it. The released cooled elastomer does not return to its original form, but rather substantially retains the distorted shape for an indefinite period of time. The elastomer in the distorted shape is heated to an appropriate elevated temperature thereby allowing the article to recover towards its original undistorted shape.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.