Process for producing a mainly inorganic foam, and thus produced mass or moulded part
OwnerGerhard Melcherinventor
Life of this patent
Estimating the term…
Abstract
A premix composition for producing an inorganic solid foamed mass by mixing component (A) an aqueous acidic phosphate solution of mainly polyvalent cations and phosphoric acid wherein between 0.8 and 1.75 protons of the phosphoric acid molecule of said phosphate are neutralized by the cations, which also contains one or more fillers dispersed therein, with (B) an oxide, hydroxide or polyvalent salt of a weak acid as hardener and a carbonate foaming agent. A process of producing an inorganic foamed mass using the premix composition and a solid foamed mass produced by the process are also disclosed. The process produces a relatively elastic cross-linked structure due to mainly the secondary phosphates being neutralized versus the tertiary phosphate groups.
Claims21
A premix composition for producing an inorganic solid foamed mass by mixing components (A) and (B) to form a foam and allowing said foam to set to form said solid foam mass, wherein said premix contains components (A) and (B) separate from each other prior to mixing and component (A) comprises an aqueous acidic phosphate solution of mainly polyvalent cations and phosphoric acid wherein between 0.8 to 1.75 protons of the phosphoric acid molecule of said phosphate are neutralized by the cations, and which also contains one or more fillers dispersed therein, and having a viscosity at room temperature in the range of 2,000 mPa.s to 60,000 mPa.s;
- and wherein component (B) comprises an oxide, hydroxide or polyvalent salt of a weak acid as hardener and foaming agent, a carbonate which develops a gas under hardening conditions within 5 seconds to 10 minutes of mixing and in amount to neutralize mainly the secondary phosphate groups of component (A) to form a relatively elastic cross-linked structure upon setting for a period of 20 seconds to 10 minutes said cross-linked structure is relatively elastic with respect to a cross-linked foamed structure obtained when the tertiary phosphate groups are neutralized.
A process for producing an inorganic solid foamed mass which comprises rapidly mixing components (A) and (B) to form a foam and allowing said foam to set to form said solid foamed mass, wherein component (A) comprises an aqueous acidic phosphate solution of mainly polyvalent cations and phosphoric acid wherein between 0.8 to 1.75 protons of the phosphoric acid molecule of said phosphate are neutralized by the cations, and which also contains one or more fillers dispersed therein, and having a viscosity at room temperature in the range of 2,000 mPa.s to 60,000 mPa.s;
- and wherein component (B) comprises an oxide, hydroxide or polyvalent salt of a weak acid as hardener and foaming agent, a carbonate which develops a gas under hardening conditions within 5 seconds to 10 minutes and in amount to neutralize mainly the secondary phosphate groups to form a relatively elastic cross-linked structure upon setting for a period of 20 seconds to 10 minutes said cross-linked structure is relatively elastic with respect to a cross-linked foamed structure obtained when the tertiary phosphate groups are neutralized.
Dependencies are inferred from the claim text.