A composition consisting essentially of (a) 1 to 30% by weight of a 1 to 90% by weight aqueous phosphoric acid and/or a hydrogen phosphate; (b) 1 to 40% by weight of a compound selected from the group of oxides, hydroxides and oxide hydrates of magnesium, calcium, iron, zinc and copper; (c) 40 to 95% by weight of a particulate filler selected from the group of glass; mono-, oligo- and polyphosphates of magnesium, calcium, barium and aluminium; calcium sulphate; barium sulphate; simple and complex silicates; simple and complex aluminates; simple and complex titanates; simple and complex zirconates; zirconium dioxide; titanium dioxide, aluminium oxide; silicon oxide; silicon carbide; aluminium nitride; boron nitride and silicon nitride; (d) 1 to 10% by weight of an urea compound selected from the group consisting of imidazolidine-2-on, allantoin and imidazolidinyl urea; and (e) 0 to 15% by weight of a component differing from (a) to (d).

A composition consisting essentially of (a) 1 to 30% by weight of a 1 to 90% by weight aqueous phosphoric acid and/or a hydrogen phosphate; (b) 1 to 40% by weight of a compound selected from the group of oxides, hydroxides and oxide hydrates of magnesium, calcium, iron, zinc and copper; (c) 40 to 95% by weight of a particulate filler selected from the group of glass; mono-, oligo- and polyphosphates of magnesium, calcium, barium and aluminium; calcium sulphate; barium sulphate; simple and complex silicates; simple and complex aluminates; simple and complex titanates; simple and complex zirconates; zirconium dioxide; titanium dioxide, aluminium oxide; silicon oxide; silicon carbide; aluminium nitride; boron nitride and silicon nitride; (d) 1 to 10% by weight of an urea compound selected from the group consisting of imidazolidine-2-on, allantoin and imidazolidinyl urea; and (e) 0 to 15% by weight of a component differing from (a) to (d).

The invention relates to a method for producing a multi-purpose isotropic hydroxylapatite/gelatine composite material, involving at least the following steps: a) providing a suspension of powdered hydroxylapatite in a liquid medium selected from the group comprising a C1-C10 alcohol, particularly ethanol, another dispersing agent that can be mixed with water, water, and mixtures thereof; b) adding an aqueous solution of gelatine, preferably at a concentration of 5 to 25 wt. % gelatine, to the suspension; c) agitating the mixture at a predefined temperature for a predefined period of time, preferably in the region of 1 to 10 hours, until the liquid medium has been fully or partially evaporated; and d) optionally drying the product obtained in step c). In a specific embodiment, the method is characterised in that the product obtained in step c) or d) is additionally infiltrated with at least one aliphatic polyether in an additional step e1). In another specific embodiment, the method is characterised in that the product obtained in step c), d) or e1) is additionally brought into contact with at least one agent for crosslinking the gelatine chains, in step e2). A further aspect of the invention relates to the composite material produced using the method described above, and the use of same, particularly as artificial ivory.

The invention relates to a method for producing a multi-purpose isotropic hydroxylapatite/gelatine composite material, involving at least the following steps: a) providing a suspension of powdered hydroxylapatite in a liquid medium selected from the group comprising a C1-C10 alcohol, particularly ethanol, another dispersing agent that can be mixed with water, water, and mixtures thereof; b) adding an aqueous solution of gelatine, preferably at a concentration of 5 to 25 wt. % gelatine, to the suspension; c) agitating the mixture at a predefined temperature for a predefined period of time, preferably in the region of 1 to 10 hours, until the liquid medium has been fully or partially evaporated; and d) optionally drying the product obtained in step c). In a specific embodiment, the method is characterised in that the product obtained in step c) or d) is additionally infiltrated with at least one aliphatic polyether in an additional step e1). In another specific embodiment, the method is characterised in that the product obtained in step c), d) or e1) is additionally brought into contact with at least one agent for crosslinking the gelatine chains, in step e2). A further aspect of the invention relates to the composite material produced using the method described above, and the use of same, particularly as artificial ivory.

An embodiment includes a Class C fly ash (CFA) cementitious composition with a controllable setting time comprising at least one Class C fly ash; at least one alkali hydroxide; at least one source of phosphate; and water. Alternate embodiments include a Class C fly ash (CFA) cementitious composition with a solid activator comprising at least one Class C fly ash; at least one alkali carbonate; at least one source of phosphate; and water.

A medical use honeycomb structure having a plurality of through-holes extending in one direction, wherein an outer peripheral section of the medical use honeycomb structure has a through-hole groove formed by incomplete side walls of the through-hole, and a through-hole inlet adjacent to the through-hole groove.

Disclosed is a method for producing a porous monolithic material from at least one powder, preferably mineral, the method including at least one step of low-temperature compression of a mixture based on powder and at least one solvent, preferably water. The materials produced by the method have improved mechanical properties compared to the prior art materials. The materials for medical application, such as hydroxyapatite, also have improved biocompatibility compared to the prior art materials. Also disclosed are materials produced by the method.

Disclosed is a method for producing a porous monolithic material from at least one powder, preferably mineral, the method including at least one step of low-temperature compression of a mixture based on powder and at least one solvent, preferably water. The materials produced by the method have improved mechanical properties compared to the prior art materials. The materials for medical application, such as hydroxyapatite, also have improved biocompatibility compared to the prior art materials. Also disclosed are materials produced by the method.

A coating and devices using the coating are provided. The coating is applied in liquid form and dried or otherwise cured to form a durable adherent coating resistant to high temperatures and having optional hydrophobic properties. The coating formulation contains an aqueous formulation of silica, one or more fillers, and sufficient base, (e.g., potassium hydroxide), to have a pH exceeding about 10.5 during at least part of the formulation process. The formulation may contain a compound(s) that affects surface free energy, energy to make the cured coating hydrophobic. Such compounds include silanes containing halogens (e.g., fluorine or chlorine) and in particular silanes containing one or more hydrolyzable groups attached to at least one silicon atom and a group containing one or more halogens (e.g., chlorine or fluorine). A medical instrument (e.g., electrosurgical instrument) may be at least partially covered by a coating using the formulation.

A coating and devices using the coating are provided. The coating is applied in liquid form and dried or otherwise cured to form a durable adherent coating resistant to high temperatures and having optional hydrophobic properties. The coating formulation contains an aqueous formulation of silica, one or more fillers, and sufficient base, (e.g., potassium hydroxide), to have a pH exceeding about 10.5 during at least part of the formulation process. The formulation may contain a compound(s) that affects surface free energy, energy to make the cured coating hydrophobic. Such compounds include silanes containing halogens (e.g., fluorine or chlorine) and in particular silanes containing one or more hydrolyzable groups attached to at least one silicon atom and a group containing one or more halogens (e.g., chlorine or fluorine). A medical instrument (e.g., electrosurgical instrument) may be at least partially covered by a coating using the formulation.