Foamed insulation coating on pipes and methods therefor
US10234068B2 · kind B2 · utility
27Cited by
1References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 19, 2016 |
| Grant date | Mar 19, 2019 |
| Priority date | — |
| Expiry date | Apr 15, 2037 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2379/08
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method of providing a foamed insulation coating on at least a portion of a pipe, including extruding a melt stream over the pipe portion. The melt stream includes a matrix polymer and expandable fillers in an unexpanded state, the melt stream being maintained at a sufficiently high temperature to maintain the matrix polymer in extrudable form and at a sufficiently high pressure to maintain the expandable fillers in the unexpanded state. Once extruded, the expandable fillers are permitted to expand into an expanded state at a lower pressure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.