Chemistry: electrical and wave energy – Processes and products – Processes of treating materials by wave energy
Patent
1981-03-11
1982-06-15
Foelak, Morton
Chemistry: electrical and wave energy
Processes and products
Processes of treating materials by wave energy
264 26, 521136, 521137, 521181, 521187, 521188, 521915, C08G 202
Patent
active
043349714
ABSTRACT:
A process for the manufacture of a resilient foam based on a melamine-formaldehyde condensate, wherein an aqueous or alcoholic solution or dispersion containing a melamine-formaldehyde precondensate, an emulsifier, a blowing agent and a hardener is foamed by ultra-high-frequency irradiation and the foam is hardened by crosslinking the precondensate. The foam may be employed for heat and sound insulation, and as a packaging material.
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patent: 3662043 (1972-05-01), Rubeus
patent: 3821337 (1974-06-01), Bunclark et al.
patent: 4134942 (1979-01-01), Mirr et al.
patent: 4192923 (1980-03-01), Tajkowski
patent: 4234698 (1980-11-01), Inverarity et al.
patent: 4273887 (1981-06-01), Wolff
Kreibiehl Guenter
Mahnke Harald
Weber Heinz
Woerner Frank P.
BASF - Aktiengesellschaft
Foelak Morton
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