Method for the production of abrasive foams
AssigneeBASF SE
InventorsArmin Alteheld, Klaus Hahn, Christof Möck, Horst Baumgartl, Jens-Uwe Schierholz, Maxim Peretolchin
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Abstract
A process for production of an abrasive foam based on a melamine-formaldehyde condensate comprising inorganic nanoparticles, comprising the steps of: (1) preparation of a solution or dispersion comprising a precondensate of the foam to be produced, and also comprising inorganic nanoparticles, (2) foaming of the precondensate via heating of the solution or dispersion from step (1), in order to obtain a foam which comprises inorganic nanoparticles, and also, if appropriate, (3) heat-conditioning of the foam obtained in step (2), leads to improved abrasion in the polishing of delicate surfaces.
Claims15
A process for production of an abrasive foam based on a melamine-formaldehyde condensate comprising inorganic nanoparticles, comprising the steps of:
- (1) preparing a solution or dispersion comprising a precondensate of the foam to be produced, and also comprising inorganic nanoparticles and comprising at least one physical blowing agent whose boiling point is from 0 to 80° C., and optionally further comprising added component (Z),
- (2) foaming of the precondensate via heating of the solution or dispersion from step (1) to a temperature of at least 60° C., in order to obtain a foam which comprises inorganic nanoparticles, and optionally,
- (3) heat-conditioning, at a temperature of from 120 to 300° C., of the foam obtained in step (2).
An abrasive foam that can be produced by a process for production of an abrasive foam based on a melamine-formaldehyde condensate comprising inorganic nanoparticles, comprising the steps of:
- (1) preparing a solution or dispersion comprising a precondensate of the foam to be produced, and also comprising inorganic nanoparticles and comprising at least one physical blowing agent whose boiling point is from 0 to 80° C., and optionally further comprising added component (z),
- (2) foaming of the preconcensate via heating of the solution or dispersion from step (1) to a temperature of at least 60° C., in order to obtain a foam which comprises inorganic nanoparticles, and optionally,
- (3) heat-conditioning, at a temperature of from 120 to 300° C., of the foam obtained in step (2);
- wherein the abrasive foam has an open cell structure and a density of 3 to 50 g per liters.
Dependencies are inferred from the claim text.