Method for making a quasi-incompressible phase-change material, shear-thinned and with low heat conductivity
US7320770B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Feb 4, 2002 |
| Grant date | Jan 22, 2008 |
| Priority date | — |
| Expiry date | Feb 4, 2022 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L59/14
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The process according to the invention includes the combination, with a liquid phase change material (PCM), of a texturing agent chosen so as to greatly reduce the thermal convection and whose viscosity is decreased reversibly under shearing. The material formed has a gelled consistency when at rest, and fluidized under shearing. The PCM comprises a mixture of chemical compounds from the alkane family: paraffins, waxes, fatty alcohols, fatty acids etc., and the texturing agent is a high mass polymer (hydrocarbonate polymers, ester or ether polymers, mixed ester-hydrocarbon polymers), an ionomer polymer or a di, tri or multi-block styrene copolymer (SBS: styrene-butadiene-styrene, SEBS: styrene-ethylene-butadiene-styrene).Applications: thermal insulation of vessels or lines, and more especially, for hydrocarbon transport lines.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.