Degradable extrusion resistant compositions and articles of manufacture
US10227471B2 · kind B2 · utility
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17Claims
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Key dates
| Filing date | Jul 15, 2016 |
| Grant date | Mar 12, 2019 |
| Priority date | — |
| Expiry date | Oct 24, 2036 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B2200/08
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A degradable polymer composite comprises a polyurethane comprising one or more of the following groups: ester groups; carbonate groups; or ether groups, in a backbone of the polyurethane; and about 1 to about 30 parts by weight of an acidic or basic powder comprising particles having an average size of about 5 microns to about 1 millimeter per 100 parts of the polyurethane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.