초록 ▼

Open-cell foamed particles and molded shapes having up to 99% porosity are formed from fumed oxides, for example SiO2, Al2O3, TiO2, with or without functional groups, in 30-99%, by weight, and polymers, for example polyvinyl chloride and copolymers thereof, and styrene. The resulting structures are

Open-cell foamed particles and molded shapes having up to 99% porosity are formed from fumed oxides, for example SiO2, Al2O3, TiO2, with or without functional groups, in 30-99%, by weight, and polymers, for example polyvinyl chloride and copolymers thereof, and styrene. The resulting structures are thermally insulating. The structures can be formed by beating small amounts of a liquid polymerizable monomer into the fumed oxide or by immersing a formed shape of the oxide in a liquid monomer and thereafter polymerizing the monomer to a solid polymer. The oxide is believed to have a microfibrous nature and the polymer is believed to coat the oxide, without destroying the open-nature configuration of the oxide, and cements the oxide particles together in the microfibrous condition.

대표청구항 ▼

A solid composition of matter comprising: an open-cell network formed of 99-30% by weight of a microfibrous, inert, inorganic oxide selected from the groups consisting of silicon, aluminum and titanium and is formed of particles having a particle size in the range 60-200 angstroms and the particles

A solid composition of matter comprising: an open-cell network formed of 99-30% by weight of a microfibrous, inert, inorganic oxide selected from the groups consisting of silicon, aluminum and titanium and is formed of particles having a particle size in the range 60-200 angstroms and the particles are cohesively joined together to form microfibers and 1-70% of a solid polymer selected from the group consisting of vinyl homopolymers, copolymers and polystyrene wherein the polymer coats the fibrous structure of the inorganic compound to strengthen the nature of the fibrous material; said composition being characterized by 30-99% open-cell pores by volume.