Patent US1541988A successfully refreshed from Google Patents.
Patent US4470917A successfully refreshed from Google Patents.
US4470917A
Expired / Lapsed
US
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Thermal energy storage compositions
Assignee: Ciba Specialty Chemicals Water Treatments Ltd
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Filing: 1983-02-10
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Granted: 1984-09-11
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Expires: 2003-02-10
Abstract
Abstract Thermal energy storage compositions comprise a thermal energy storage material, for instance an inorganic hydrate that can undergo a change of hydration with accompanying release or storage of latent heat of hydration at a temperature of 10° to 100° C., held in a matrix of polymeric material, generally acrylic polymer. In one aspect of the invention the composition is in particulate form and so can, for instance, be poured into the heat exchanger in which it is to be used. In another aspect of the invention the storage material includes polyvalent metal ions and the polymeric material is a cationic polymer. In another aspect of the invention the composition is made by forming a solution, generally in water, of all the polymerizable material and most or all of the storage material and then polymerizing the polymerizable material in this solution. The solution is generally a low viscosity fluid and polymerization may be conducted in the heat exchanger vessel in which the composition is to be used.
Inventors
- 👤 Malcolm Hawe
- 👤 David Marshall
- 👤 John R. Walker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:00
CPC Classifications
C; C09; C09K; C09K5/00; C09K5/02; C09K5/06; C09K5/063; Y; Y10; Y10S; Y10S525/00; Y10S525/916; Y10S525/936; Y10S526/00; Y10S526/909; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
72 words
A thermal energy storage composition that comprises a thermal energy storage material and a polymeric material and that is particulate and in which the storage material is held in particles of a solid thermally conducting matrix of the polymeric material, and wherein the storage material provides, after storage of latent heat, a heterogeneous system comprising a liquid phase and at least one solid phase of a different density from the liquid phase.
Claim 2
Dependent Claim
72 words
A thermal energy storage composition that comprises a thermal energy storage material and a polymeric material and that is particulate and in which the storage material is held in particles of a solid thermally conducting matrix of the polymeric material, and wherein the storage material provides, after storage of latent heat, a heterogeneous system comprising a liquid phase and at least one solid phase of a different density from the liquid phase.
Claim 3
Dependent Claim
30 words
A composition according to claim 1 in which the composition comprises 1 to 25% by weight of the storage material and 99 to 75% by weight of the polymeric material.
Claim 4
Dependent Claim
43 words
A composition according to claim 1 in which the thermal energy storage material is a compound or blend of compounds that will undergo a change of state, with accompanying release or storage of latent heat, at a temperature of 10° to 100° C.
Claim 5
Dependent Claim
42 words
A composition according to claim 1 in which the thermal energy storage material comprises an inorganic hydrate that will undergo a change of hydration, with accompanying release or storage of latent heat of hydration, at a temperature of 10° to 100° C.
Claim 6
Dependent Claim
66 words
A composition according to claim 1 in which the thermal energy storage material comprises an inorganic hydrate that will undergo a change of hydration, with accompanying release or storage of latent heat of hydration, at a temperature of 10° to 100° C. and the polymeric material is a water absorbing, unfoamed, polymeric material that remains as a solid during use as a thermal energy storage composition.
Claim 7
Dependent Claim
15 words
A composition according to claim 1 in which the polymeric material is an acrylic polymer.
Claim 8
Dependent Claim
20 words
A composition according to claim 1 in which the particles have a particle size of from 1 to 100 microns.
Claim 9
Dependent Claim
36 words
A composition according to claim 1 in which the particles have a particle size of from 1 to 100 microns and are dispersed in oil and the composition can serve as a circulating heat exchange fluid.
Claim 10
Dependent Claim
20 words
A composition according to claim 1 in which the particles have a particle size of from 0.1 to 5 cm.
Claim 11
Independent Claim
93 words
A method of making a thermal energy storage composition that comprises a thermal energy storage material and a polymeric material and that is particulate and in which the storage material is held in particles of a solid thermally conducting matrix of the polymeric material, the method comprising blending polymerisable material, with the storage material and then either polymerising the polymerisable material to form an emulsion or dispersion of polymerised material or polymerising the polymerisable material to form the matrix in bulk form and then comminuting the bulk matrix during or after the polymerisation.
Claim 12
Independent Claim
93 words
A method of making a thermal energy storage composition that comprises a thermal energy storage material and a polymeric material and that is particulate and in which the storage material is held in particles of a solid thermally conducting matrix of the polymeric material, the method comprising blending polymerisable material, with the storage material and then either polymerising the polymerisable material to form an emulsion or dispersion of polymerised material or polymerising the polymerisable material to form the matrix in bulk form and then comminuting the bulk matrix during or after the polymerisation.
Claim 13
Dependent Claim
31 words
A composition according to claim 1 in which the thermal energy storage material that includes polyvalent metal ions and that is held in a thermally conducting matrix of cationic polymeric material.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-09-11 | 1988-03-12 | 1988-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-09-11 | 1992-03-12 | 1992-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-09-11 | 1996-03-12 | 1996-09-11 | $7700.00 | Window Closed / Lapsed |