DEVICE FOR PRODUCING A POLYURETHANE REACTION MIXTURE

The variations in the delivery rate of additive caused by fluctuations in a system for the preparation of a polyurethane reaction mixture from flowable reactants and an additive, in particular a blowing agent, are kept within negligible limits by subdividing the supply pipe (4) to the mixing head (6...

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Main Authors KRIPPL, KURT, FIETZ, JUERGEN, ALTHAUSEN, FERDINAND, RAFFEL, REINER, EBELING, WILFRIED, SULZBACH, HANS-MICHAEL
Format Patent
LanguageEnglish
French
German
Published 29.11.1995
Edition5
Subjects
MAKING GRANULES OR PREFORMS
PERFORMING OPERATIONS
PREPARATION OR PRETREATMENT OF THE MATERIAL TO BESHAPED
RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIALCONTAINING PLASTICS
TRANSPORTING
WORKING OF PLASTICS
WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Summary:The variations in the delivery rate of additive caused by fluctuations in a system for the preparation of a polyurethane reaction mixture from flowable reactants and an additive, in particular a blowing agent, are kept within negligible limits by subdividing the supply pipe (4) to the mixing head (6) into a main pipe (8) and a subpipe (9) and introducing the additive into the side stream, which is substantially smaller than the main stream.
Bibliography:Application Number: EP19920905375