Melamine-formaldehyde foam with improved weather resistance
AssigneeBASF SE
InventorsSebastian Alexander Weisse, Werner Lenz, Bernhard Vath, Tobias Heinz Steinke
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Abstract
Melamine-formaldehyde foam with improved weather resistance comprising 0.1 to 8 wt.-% of at least one UV stabilizer, such as benzotriazole derivatives and piperidinol derivatives and further 1 to 3 wt.-% of at least one hydrophobicization agent, such as organo-modified siloxanes and silanes and processes for producing such melamine-formaldehyde foams with improved weather resistance.
Claims12
Melamine-formaldehyde foam comprising 0.2 to 8 wt. % of at least one UV stabilizer, selected from piperidinol derivatives, and 0.01 to 5 wt. % of at least one hydrophobicization agent.
A process for producing a melamine-formaldehyde foam comprising
- step a) heating and foaming an aqueous mixture M using microwave radiation, said mixture M comprising at least one melamine-formaldehyde precondensate, at least one curative, at least one surfactant and at least one blowing agent, and
- step b) impregnation of the foam produced in step a) with at least one UV-stabilizer, selected from piperidinol derivatives, and at least one hydrophobicization agent.
Dependencies are inferred from the claim text.