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Title: Dry powder mixes comprising phase change materials

A free flowing, conformable powder-like mix of silica particles and a phase change material (p.c.m.) is disclosed. The silica particles have a critical size of about 7 [times] 10[sup [minus]3] to about 7 [times] 10[sup [minus]2] microns and the pcm must be added to the silica in an amount of 80 wt. % or less pcm per combined weight of silica and pcm. The powder-like mix can be used in tableware items, medical wraps, tree wraps, garments, quilts and blankets, and in cementitious compositions of the type in which it is beneficial to use a pcm material. The silica-pcm mix can also be admixed with soil to provide a soil warming effect and placed about a tree, flower, or shrub. 9 figs.
Inventors:
Issue Date:
OSTI Identifier:
7070367
Assignee:
Univ. of Dayton, Dayton, OH (United States) PTO; EDB-94-084384
Patent Number(s):
US 5106520; A
Application Number:
PPN: US 7-462365
Contract Number:
FG03-86SF16308
Resource Relation:
Patent File Date: 9 Jan 1990
Country of Publication:
United States
Language:
English
Subject:
60 APPLIED LIFE SCIENCES; PHASE CHANGE MATERIALS; CHEMICAL PREPARATION; SILICON OXIDES; HORTICULTURE; MIXTURES; PARTICLE SIZE; AGRICULTURE; CHALCOGENIDES; DISPERSIONS; MATERIALS; OXIDES; OXYGEN COMPOUNDS; SILICON COMPOUNDS; SIZE; SYNTHESIS; 553000* - Agriculture & Food Technology