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1. WO1991000304 - MELT POLYMERIZATION PROCESS FOR MAKING POLYURETHANES

Publication Number WO/1991/000304
Publication Date 10.01.1991
International Application No. PCT/US1990/002869
International Filing Date 14.05.1990
IPC
B29C 67/24 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
67Shaping techniques not covered by groups B29C39/-B29C65/93
24characterised by the choice of material
C08G 18/08 2006.01
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
18Polymeric products of isocyanates or isothiocyanates
06with compounds having active hydrogen
08Processes
C08G 18/32 2006.01
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
18Polymeric products of isocyanates or isothiocyanates
06with compounds having active hydrogen
28characterised by the compounds used containing active hydrogen
30Low-molecular-weight compounds
32Polyhydroxy compounds; Polyamines; Hydroxy amines
C08G 18/66 2006.01
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
18Polymeric products of isocyanates or isothiocyanates
06with compounds having active hydrogen
28characterised by the compounds used containing active hydrogen
65Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
66Compounds of groups C08G18/42, C08G18/48, or C08G18/52111
CPC
B29C 67/246
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
67Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
24characterised by the choice of material
246Moulding high reactive monomers or prepolymers, e.g. by reaction injection moulding [RIM], liquid injection moulding [LIM]
C08G 18/0895
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
18Polymeric products of isocyanates or isothiocyanates
06with compounds having active hydrogen
08Processes
0895Manufacture of polymers by continuous processes
C08G 18/3206
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
18Polymeric products of isocyanates or isothiocyanates
06with compounds having active hydrogen
28characterised by the compounds used containing active hydrogen
30Low-molecular-weight compounds
32Polyhydroxy compounds; Polyamines; Hydroxyamines
3203Polyhydroxy compounds
3206aliphatic
C08G 18/3212
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
18Polymeric products of isocyanates or isothiocyanates
06with compounds having active hydrogen
28characterised by the compounds used containing active hydrogen
30Low-molecular-weight compounds
32Polyhydroxy compounds; Polyamines; Hydroxyamines
3203Polyhydroxy compounds
3212containing cycloaliphatic groups
C08G 18/6674
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
18Polymeric products of isocyanates or isothiocyanates
06with compounds having active hydrogen
28characterised by the compounds used containing active hydrogen
65Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
66Compounds of groups C08G18/42, C08G18/48, or C08G18/52
6666Compounds of group C08G18/48 or C08G18/52
667with compounds of group C08G18/32 or polyamines of C08G18/38
6674with compounds of group C08G18/3203
Applicants
  • THE DOW CHEMICAL COMPANY [US/US]; 2030 Dow Center Abbott Road Midland, MI 48640, US
Inventors
  • BONK, Henry, W.; US
  • CHEN, Augustin, T.; US
  • EHRLICH, Benjamin, S.; US
  • ELLERBE, LaVerne, W.; US
Agents
  • DAMOCLES, Nemia, C.; The Dow Chemical Company P.O. Box 1967 Midland, MI 48641-1967, US
Priority Data
372,49827.06.1989US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) MELT POLYMERIZATION PROCESS FOR MAKING POLYURETHANES
(FR) PROCEDE DE POLYMERISATION A L'ETAT DE FUSION POUR LA PRODUCTION DE POLYURETHANES
Abstract
(EN)
Disclosed is an improved reactive extrusion process for the continuous preparation of a hard polyurethane having Tg values greater than 80°C. The polyisocyanate and polyol ingredients are reacted in a twin-screw extruder which is limited to a single zone of high shear mixing. The present process prevents the formation of small bubbles in the extruded polyurethanes as well as the formation of yellow coloration in what should be an essentially water white polymer, problems which are encountered in the preparation of these hard polyurethanes using the prior art processes wherein the high shear mixing is carried out in multiple zones.
(FR)
On décrit un procédé d'extrusion réactive améliorée pour la préparation continue d'un polyuréthane dur présentant des valeurs Tg supérieures à 80°C. On fait réagir les ingrédients de polyisocyanate de polyol dans une boudineuse à deux vis limitée à une seule zone de mélange à cisaillement élevé. Ledit procédé empêche la formation de petites bulles dans les polyuréthanes extrudés ainsi que la formation de coloration jaune dans ce qui doit être essentiellement un polymère blanc à eau. De telles formations problématiques se présentent lors de la préparation desdits polyuréthanes durs lorsqu'on utilise les procédés de l'art antérieur, au cours desquels le mélange à cisaillement élevé s'effectue dans des zones multiples.
Also published as
Latest bibliographic data on file with the International Bureau