IT1291979B1 - Polyurethane mixture production using a self cleaning mixing apparatus - fed with a total pre-polymer and a chemically reactive component - Google Patents

Polyurethane mixture production using a self cleaning mixing apparatus - fed with a total pre-polymer and a chemically reactive component

Info

Publication number
IT1291979B1
IT1291979B1 ITMI971207A IT1291979B1 IT 1291979 B1 IT1291979 B1 IT 1291979B1 IT MI971207 A ITMI971207 A IT MI971207A IT 1291979 B1 IT1291979 B1 IT 1291979B1
Authority
IT
Italy
Prior art keywords
cleaning member
polymer
reactive component
chemically reactive
fed
Prior art date
Application number
Other languages
Italian (it)
Inventor
Carlo Fiorentini
Alberto Bonansea
Original Assignee
Afros Spa
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 Afros Spa filed Critical Afros Spa
Priority to IT97MI001207 priority Critical patent/IT1291979B1/en
Publication of ITMI971207A0 publication Critical patent/ITMI971207A0/it
Priority to DE69809119T priority patent/DE69809119T2/en
Priority to EP98109146A priority patent/EP0879685B1/en
Priority to US09/082,725 priority patent/US6079867A/en
Priority to JP14179998A priority patent/JP3703625B2/en
Publication of ITMI971207A1 publication Critical patent/ITMI971207A1/en
Application granted granted Critical
Publication of IT1291979B1 publication Critical patent/IT1291979B1/en

Links

Abstract

Polyurethane mixture is produced from at least a total pre-polymer and a chemically reactive component in a self cleaning mixer having a mixing chamber (22) into which the pre-polymer is injected via radially oriented nozzles (23,24) and the reactive component is injected via an axial duct (41), in a cleaning member (27), opening into the bottom of the mixing chamber. The cleaning member (27) is axially movable between a retracted position, in which the injection nozzles (23,24) open into the mixing chamber (22) and an advanced position in which the injection nozzles (23,24) are closed. Also claimed is the apparatus for performing the method above in which, in the advanced position of the cleaning member (27), the polyurethane components are recycled via longitudinally extending recycling grooves (39,44) in the cleaning member (27), the grooves being separated by a sealing zone (27c); and the above apparatus which includes a valving member (52) slidable in the axial duct of th e cleaning member (27) with a fluid actuated control system (28,29,56) connected to the valving member (52) and the cleaning member (57).
IT97MI001207 1997-05-22 1997-05-22 Polyurethane mixture production using a self cleaning mixing apparatus - fed with a total pre-polymer and a chemically reactive component IT1291979B1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
IT97MI001207 IT1291979B1 (en) 1997-05-22 1997-05-22 Polyurethane mixture production using a self cleaning mixing apparatus - fed with a total pre-polymer and a chemically reactive component
DE69809119T DE69809119T2 (en) 1997-05-22 1998-05-20 Self-cleaning mixing device and method for producing polyurethane mixtures
EP98109146A EP0879685B1 (en) 1997-05-22 1998-05-20 Self-cleaning, mixing apparatus and method for the production of polyurethane mixtures
US09/082,725 US6079867A (en) 1997-05-22 1998-05-21 Self-cleaning, mixing apparatus and method for the production of polyurethane formulations
JP14179998A JP3703625B2 (en) 1997-05-22 1998-05-22 Self-cleaning mixing apparatus and method for producing a polyurethane mixture

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT97MI001207 IT1291979B1 (en) 1997-05-22 1997-05-22 Polyurethane mixture production using a self cleaning mixing apparatus - fed with a total pre-polymer and a chemically reactive component

Publications (3)

Publication Number Publication Date
ITMI971207A0 ITMI971207A0 (en) 1997-05-22
ITMI971207A1 ITMI971207A1 (en) 1998-11-22
IT1291979B1 true IT1291979B1 (en) 1999-01-25

Family

ID=11377199

Family Applications (1)

Application Number Title Priority Date Filing Date
IT97MI001207 IT1291979B1 (en) 1997-05-22 1997-05-22 Polyurethane mixture production using a self cleaning mixing apparatus - fed with a total pre-polymer and a chemically reactive component

Country Status (1)

Country Link
IT (1) IT1291979B1 (en)

Also Published As

Publication number Publication date
ITMI971207A0 (en) 1997-05-22
ITMI971207A1 (en) 1998-11-22

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