US4825939A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymeric compositions incorporating polyethylene glycol as a phase change material
Assignee: University of Dayton
•
Filing: 1986-07-15
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Granted: 1989-05-02
•
Expires: 2006-07-15
Abstract
Abstract A polymeric composition comprising a polymeric material and polyethylene glycol or end-capped polyethylene glycol as a phase change material, said polyethylene glycol and said end-capped polyethylene glycol having a molecular weight greater than about 400 and a heat of fusion greater than about 30 cal/g; the composition is useful in making molded and/or coated materials such as flooring, tiles, wall panels and the like; paints containing polyethylene glycols or end-capped polyethylene glycols are also disclosed.
Inventors
- 👤 Ival O. Salyer
- 👤 Charles W. Griffen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:42
CPC Classifications
F; F28; F28D; F28D20/00; F28D20/02; F28D20/023; C; C09; C09K; C09K5/00; C09K5/02; C09K5/06; C09K5/063; Y; Y02; Y02E; Y02E60/00; Y02E60/14
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
50 words
A building unit having an integrated construction useful in thermal energy storage comprising a polymeric material having incorporated therein an end-capped polyethylene glycol as a phase change material, said end-capped polyethylene glycol having a molecular weight greater than about 400 and a heat of fusion greater than about 30 cal/g.
Claim 2
Dependent Claim
50 words
A building unit having an integrated construction useful in thermal energy storage comprising a polymeric material having incorporated therein an end-capped polyethylene glycol as a phase change material, said end-capped polyethylene glycol having a molecular weight greater than about 400 and a heat of fusion greater than about 30 cal/g.
Claim 3
Dependent Claim
14 words
The building unit of claim 1 wherein said polymeric material is a polar polymer.
Claim 4
Dependent Claim
45 words
The building unit of claim 1 wherein said polymeric material is selected from the group consisting of nylons, polyesters, acrylic rubbers, methacrylic rubbers, polyvionyl alcohols, ethylene vinylacetate copolymer, polyvinyl acetate, vinylchloride/vinyl acetate copolymer, neoprene, butadiene/acrylonitrile copolymer, natural rubber, EPDM, polybutadiene rubber, and butadiene styrene copolymer.
Claim 5
Dependent Claim
26 words
The building unit of claim 1 wherein said polymeric material is a crystalline polymer having a melting point in the range of 16° to 42° C.
Claim 6
Dependent Claim
22 words
The building unit of claim 1 wherein end-capped polyethylene glycol has a molecular weight in the range of about 600 to 1500.
Claim 7
Dependent Claim
22 words
The building unit of claim 3 wherein said end-capped polyethylene glycol is present in an amount up to about 30% by weight.
Claim 8
Dependent Claim
22 words
The building unit of claim 1 wherein said end-capped polyethylene glycol is present in an amount up to about 20% by weight.
Claim 9
Dependent Claim
37 words
The building unit of claim 1 wherein said phase change material is a blend of end-capped polyethylene glycols having distinct melting points such that said blend exhibits two distinct melting points and two distinct heats of fusion.
Claim 10
Dependent Claim
46 words
The building unit of claim 8 wherein said blend comprises an end-capped polyethylene glycol having a first molecular weight and an end-capped polyethylene glycol having a second molecular weight and the difference between said first molecular weight and said second molecular weight is at least 2000.
Claim 11
Dependent Claim
19 words
The building unit of claim 1 wherein said end-capped polyethylene glycol is dispersed and/or dissolved in said polymeric material.
Claim 12
Dependent Claim
16 words
The building unit of claim 1 wherein said polymeric material is a natural or synthetic rubber.
Claim 13
Dependent Claim
12 words
The building unit of claim 1 wherein said building unit is crosslinked.
Claim 14
Dependent Claim
14 words
The building unit of claim 1 wherein said building unit is a floor title.
Claim 15
Dependent Claim
14 words
The building unit of claim 1 wherein said building unit is a wall panel.
Claim 16
Dependent Claim
52 words
A thermal energy storage panel having an integrated construction useful in thermal energy storage comprising a polymeric material having incorporated therein an end-capped polyethylene glycol as a phase change material, said end-capped polyethylene glycol having a molecular weight greater than about 400 and a heat of fusion greater than about 30 cal/g.
Claim 17
Dependent Claim
52 words
A thermal energy storage panel having an integrated construction useful in thermal energy storage comprising a polymeric material having incorporated therein an end-capped polyethylene glycol as a phase change material, said end-capped polyethylene glycol having a molecular weight greater than about 400 and a heat of fusion greater than about 30 cal/g.
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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) | 1992-05-01 | 1992-10-31 | 1993-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-01 | 1996-10-31 | 1997-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-01 | 2000-10-31 | 2001-05-02 | $7700.00 | Window Closed / Lapsed |