Water resistant and heat insulating material and method of makin

Details Water resistant and heat insulating material and method of makin Water resistant and heat insulating material and method of makin

1982-08-30

1984-05-29

Poer, James

Compositions: coating or plastic

Coating or plastic compositions

Metal-depositing composition or substrate-sensitizing...

106DIG1, C04B 2100

Patent

active

044512945

ABSTRACT:
This invention relates to a composition, and a method for its production, of a water resistant and heat insulating silicate material in the form of blocks and articles. Such water resistant and heat insulating material possesses a low bulk mass (of from 100 to 300 kg/m.sup.3) and improved heat insulating capacity (=0.04-0.1 W/m.deg.) with a compressive strength of from 0.3 to 1 MPa. The starting chemical composition for the production of the heat insulating material is comprehended within the following limits: SiO.sub.2 of from 62 to 68%; Al.sub.2 O.sub.3 of from 1.5 to 5%; B.sub.2 O.sub.3 of from 5 to 10%; CaO+MgO of from 0.1 to 0.5% and Na.sub.2 O of from 21 to 26%, all percentages being by weight. The light porous silicate articles so produced include the following components (in weight percent): liquid sodium silicate having a modulus of from 2.5 to 3.5--from 55 to 65%; ground solid sodium silicate--from 11 up to 22%; borax--of from 7.4 up to 14%; and perlite--from 6 up to 17%. Green perlite as well as residual fine fraction of expanded perlite can be used.

REFERENCES:
patent: 2117605 (1938-05-01), Fowler et al.

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