Composition comprising encapsulated substrate with thermoplastic polymer overcoating
US5187011A · kind A · utility
33Cited by
22References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 9, 1992 |
| Grant date | Feb 16, 1993 |
| Priority date | — |
| Expiry date | Jan 9, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31917
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An encapsulated breaker chemical composition used in an oil or gas stimulation operation which comprises: a breaker chemical; and a pinhole free coating of an ionically and covalently crosslinked neutralized sulfonated elastomeric polymer of about 2 to about 80 microns thick deposited onto the surface of the breaker chemical, wherein said polymer encapsulates the breaker chemical, wherein the polymer is permeable to the breaker chemical and the polymer is non-reactive to the breaker chemical.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.