Process for producing shaped bodies having thermally insulating

Details Process for producing shaped bodies having thermally insulating Process for producing shaped bodies having thermally insulating

1995-07-14

1996-08-06

Kuhns, Allan R.

Plastic and nonmetallic article shaping or treating: processes

Including step of generating heat by friction

264112, 264234, 264345, 428 69, B29C 4302

Patent

active

055430953

ABSTRACT:
A process for producing shaped bodies having thermally insulating properties and based on foamed alkali metal silicate particles includes silicon dioxide (SiO.sub.2) and alkali metal oxide (M.sub.2 O) (M is an alkali metal) in a molar ratio of from 2 to 4.5 (SiO.sub.2 :M.sub.2 O), and includes mixing 100 parts by weight of the foamed alkali metal silicate particles with an aqueous solution of monoaluminum phosphate (Al(H.sub.2 PO.sub.4).sub.3) in such a way that the molar ratio Si:Al in the mixture ranges from 1 to 60, placing the mixture in a preselected mold and compacting the mixture to from 20% to 80% of the original volume to give a shaped body and heating the shaped body to a temperature of from 100.degree. C. to 500.degree. C. until a chemical reaction bond between the alkali metal silicate particles and the monoaluminum phosphate has taken place. The shaped bodies so produced can be used as thermal and sound insulation material.

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Chemical Abstracts 6001, 92 (1980), Mar. 24, No. 12, Columbus, OH, US, 92:98605y Silicate foaming composition, Nippon Chemical Industrial Co., Ltd.
Database WPI, Section Ch, Week 8723, May 30, 1985, Derwent Publications Ltd., London, GB.
JP-49069755 A (1974).
Theodor Chvatal, Wien, Sprechsaal 108 (1975) "Stand der feuerfesten phosphatbindung heute".

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