Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beazer East Inc
Original Assignee
Koppers Co Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Koppers Co IncfiledCriticalKoppers Co Inc
Priority to ES483632ApriorityCriticalpatent/ES483632A1/es
Publication of ES483632A1publicationCriticalpatent/ES483632A1/es
Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products
(AREA)
Phenolic Resins Or Amino Resins
(AREA)
Abstract
Un procedimiento para preparar una espuma fenólica, que comprende: a) preparar una mezcla espumable, que comprende una resina espumable de fenol-aldehido, un agente de hinchamiento y N-metil-2-pirrolidona; b) espumar la mezcla mediante la adición de un catalizador ácido; y c) curar la espuma fenólica.
ES483632A1979-08-241979-08-24Un procedimiento para preparar una espuma fenolica
ExpiredES483632A1
(es)
Composicao para preparacao de espumas de poliuretano enrijecidas, espuma de poliuretano enrijecida e processo para preparacao de espumas de poliuretano enrijecidas
Procedimiento para preparar espumas de uretano, por reaccion de un poliester, un isocianato organico, un agente espumante, un catalizador y un agente de reticulacion.
Sulfo-hydrazides et sulfo-semi-carbazides aromatiques utilisables comme agents gonflants (agents moussants) pour la preparation de mousses de resines synthetiques