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 Title: |
US3986969:
Thixotropic mixture and method of making same
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Telkes, Maria; Newark, DE
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| Assignee: |
The University of Delaware, Newark, DE
other patents from UNIVERSITY OF DELAWARE (599495) (approx. 203)
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| Published / Filed: |
1976-10-19
/ 1975-02-06
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| Application Number: |
US1975000547606
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| IPC Code: |
Advanced:
C09K 5/06;
Core:
C09K 5/00;
IPC-7:
C09K 3/00;
F24H 7/00;
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| ECLA Code: |
C09K5/06B;
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| U.S. Class: |
Current:
252/070;
126/400;
516/110;
Original:
252/070;
126/400;
252/317;
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| Field of Search: |
126/400
252/070,317
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| Priority Number: |
| 1975-02-06 |
US1975000547606 |
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| Abstract: |
A mixture for the storage of heat energy utilizing a heat of fusion material includes sodium sulfate decahydrate, borax as a nucleating agent, and hydrous magnesium aluminum silicate (attapulgus clay) as a homogenizing agent. This composition maintains the salt-hydrate in suspension during repeated heating and cooling cycles.
A method is also disclosed for preparing the mixture which includes the steps of mixing water with the attapulgus clay, adding a nucleating agent to the initial mixture, and mixing the initial mixture, including the nucleating agent, with a heat of fusion material such as sodium sulfate decahydrate.
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| Attorney, Agent or Firm: |
Mortenson, C. W. ;
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| Primary / Asst. Examiners: |
Pitlick, Harris A.;
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| INPADOC Legal Status: |
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| Family: |
None
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First Claim:
Show all 17 claims |
What is claimed is:
1. A mixture for the storage of heat energy utilizing the heat of fusion of the composition comprising:
- a salt-hydrate having a heat of fusion of more than 50 BTU per pound,
- a nucleating agent, and
- a thixotropic agent, said thixotropic agent being an attapulgite-type clay substance that has lath-like particles.
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| Background / Summary: |
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| Drawing Descriptions: |
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| Description: |
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| Forward References: |
Show 31 U.S. patent(s) that reference this one
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