Porous heat-insulation material

Stock material or miscellaneous articles – Coated or structually defined flake – particle – cell – strand,... – Particulate matter

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252 62, 428407, B32B 1904, B32B 2706, B32B 2714, C04B 4300

Patent

active

042411386

ABSTRACT:
A porous heat-insulation material comprising blocks molded from granules of a porous mineral filler with a polyolefin coating. The coating thickness is 1/1000 to 1/25 of the average granule diameter; in contact regions, said granules are spaced from each other at a distance of from 0.5 to 2.0 of the coating thickness, and the mass ratio between said porous mineral filler and said polyolefin is 80-98:20-2, respectively. The material of this invention has a volume mass of from 60 to 250 kg/m.sup.3. The material features a high plasticity (its flexural strength is as high as 3-4 kgf/cm.sup.2). The compression strength of the material is 9-12 kgf/cm.sup.2. The material also has a low thermal conductivity; its thermal conductivity coefficient is 0.03-0.04 kcal/m.hr..degree.C. The material is substantially non-combustible.

REFERENCES:
patent: 3104196 (1963-09-01), Shannon
patent: 3551274 (1970-12-01), Shannon
patent: 3655564 (1972-04-01), Barrington
patent: 4066539 (1978-01-01), Hachisu et al.
patent: 4107376 (1978-08-01), Ishikawa

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