Patent US4797160A successfully refreshed from Google Patents.
US4797160A
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Phase change compositions
Assignee: University of Dayton
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Filing: 1987-08-19
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Granted: 1989-01-10
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Expires: 2007-08-19
Abstract
Abstract Compositions containing crystalline, straight chain, alkyl hydrocarbons as phase change materials including cementitious compositions containing the alkyl hydrocarbons neat or in pellets or granules formed by incorporating the alkyl hydrocarbons in polymers or rubbers; and polymeric or elastomeric compositions containing alkyl hydrocarbons.
Inventors
- 👤 Ival O. Salyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:15
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/02; C04B24/00; C04B41/00; C04B41/45; C04B41/46; C04B41/60; C04B41/61; C04B41/62; C08; C08K; C08K5/00; C08K5/01; F; F28; F28D; F28D20/00; F28D20/02; F28D20/023; C04B2103/00; C04B2103/0068; C04B2103/0071; C04B2111/00; C04B2111/00474; C04B2111/00482; C04B2111/76; Y; Y02; Y02E; Y02E60/00; Y02E60/14; Y10; Y10S; Y10S428/00; Y10S428/92; Y10S428/921
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
63 words
A composite useful in thermal energy storage comprising a matrix material having incorporated therein a phase change material, said phase change material being a crystalline, straight chain, alkyl hydrocarbon having 14 or more carbon atoms and a heat of fusion greater than 30 cal/g., said composite also comprising a flame retarding agent selected from the group consisting of halogenated hydrocarbons and halogenated phosphates.
Claim 2
Dependent Claim
63 words
A composite useful in thermal energy storage comprising a matrix material having incorporated therein a phase change material, said phase change material being a crystalline, straight chain, alkyl hydrocarbon having 14 or more carbon atoms and a heat of fusion greater than 30 cal/g., said composite also comprising a flame retarding agent selected from the group consisting of halogenated hydrocarbons and halogenated phosphates.
Claim 3
Dependent Claim
14 words
The composite of claim 1 wherein said matrix material is an inorganic cementitious material.
Claim 4
Dependent Claim
22 words
The composite of claim 2 wherein said inorganic cementitious material is selected from the group consisting of hydraulic cements, gypsum, and concrete.
Claim 5
Dependent Claim
22 words
The composite of claim 3 wherein said phase change material is incorporated into said matrix material in the form of a pellet.
Claim 6
Dependent Claim
35 words
The composite of claim 4 wherein said pellet comprises a matrix of a hard wax having a melting point greater than 50° C. and a penetration hardness less than 10 containing said phase change material.
Claim 7
Dependent Claim
24 words
The composite of claim 3 wherein said phase change material is pre-mixed with a highly absorptive filler before being introduced to said matrix material.
Claim 8
Dependent Claim
16 words
The composite of claim 1 wherein said flame retarding agent also includes a polyvalent metal oxide.
Claim 9
Dependent Claim
25 words
The composite of claim 2 wherein said composite is formed by infiltrating said matrix material with said phase change material in combination a wetting agent.
Claim 10
Dependent Claim
15 words
The composite of claim 8 wherein said wetting agent is stearic acid or stearyl alcohol.
Claim 11
Dependent Claim
45 words
The composite of claim 1 wherein said alkyl hydrocarbon is selected from the group consisting of Shellwax 100, Shellwax 120, Shellwax 200, Shellwax 300, Boron R-152, Union SR-143, Witco 128, Witco LLN, Witco 45A, Witco K-61, Witco K-51, Witco 85010-1, Aristowax 143 and Paraffin 150.
Claim 12
Dependent Claim
22 words
The composite of claim 2 wherein said alkyl hydrocarbon is a blend of normal alkyl hydrocarbons containing 16 to 20 carbon atoms.
Claim 13
Dependent Claim
49 words
The composite of claim 1 wherein said halogenated hydrocarbon is selected from the group consisting of Chlorowax 70-S, tetrabromophthalic anhydride, tetrabromobisphenol A, and decabromodiphenyl oxide; and said polyvalent metal oxide is antimony oxide, the weight ratio of said halogenated hydrocarbon to said antimony oxide being about 1:1 to 3:1.
Claim 14
Dependent Claim
12 words
A composite of claim 1 wherein said composite is a bridge deck.
Claim 15
Dependent Claim
76 words
A composite useful in thermal energy storage comprising a matrix material having incorporated therein a phase change material, said matrix material being plasterboard and said phase change material being a crystalline, straight chain, alkyl hydrocarbon having 14 or more carbon atoms and a heat of fusion greater than 30 cal/g., said plasterboard also comprising a flame retarding agent incorporated therein said flame retarding agent being selected from the group consisting of halogenated hydrocarbons and halogenated phosphates.
Claim 16
Dependent Claim
76 words
A composite useful in thermal energy storage comprising a matrix material having incorporated therein a phase change material, said matrix material being plasterboard and said phase change material being a crystalline, straight chain, alkyl hydrocarbon having 14 or more carbon atoms and a heat of fusion greater than 30 cal/g., said plasterboard also comprising a flame retarding agent incorporated therein said flame retarding agent being selected from the group consisting of halogenated hydrocarbons and halogenated phosphates.
Claim 17
Dependent Claim
66 words
A composite useful in thermal energy storage comprising a matrix material having incorporated therein a phase change material and a flame retarding agent, said phase change material being a crystalline straight chain alkyl hydrocarbon having 14 or more carbon atoms and a heat of fusion greater than 30 cal/g and said flame retarding agent being a brominated hydrocarbon which is miscible in said phase change material.
Claim 18
Dependent Claim
66 words
A composite useful in thermal energy storage comprising a matrix material having incorporated therein a phase change material and a flame retarding agent, said phase change material being a crystalline straight chain alkyl hydrocarbon having 14 or more carbon atoms and a heat of fusion greater than 30 cal/g and said flame retarding agent being a brominated hydrocarbon which is miscible in said phase change material.
Claim 19
Dependent Claim
13 words
The composite of claim 15 wherein said brominated hydrocarbon is a brominated cycloalkylalkane.
Claim 20
Dependent Claim
11 words
The composite of claim 16 wherein said brominated cycloalkylalkane is dibromoethyldibromocyclohexane.
Claim 21
Dependent Claim
25 words
The composite of claim 1 wherein said flame retarding agent is a flame retarding agent selected from the group consisting of tri(beta-chloroisopropyl) phosphate and tri(beta-chloroethyl)phosphate.
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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) | 1992-01-10 | 1992-07-11 | 1993-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-01-10 | 1996-07-11 | 1997-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-01-10 | 2000-07-11 | 2001-01-10 | $7700.00 | Window Closed / Lapsed |