Degradable extrusion resistant compositions and articles of manufacture
US10329407B2 · kind B2 · utility
1Cited by
0References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 30, 2015 |
| Grant date | Jun 25, 2019 |
| Priority date | — |
| Expiry date | Jun 19, 2037 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B2200/08
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A degradable polymer composition comprises a polyurethane comprising ester groups in a backbone of the polyurethane and carboxylic acid groups attached to the backbone of the polyurethane; and a filler comprising one or more of the following: a powder comprising particles having an average particle size of about 5 microns to about 500 microns; or a fiber having an average length of about ⅛ inch to about 5 inches. Also disclosed are articles comprising the composition. A method to degrade the article includes exposing the article to a fluid at a temperature of about 25° C. to about 300° C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.