Stock material or miscellaneous articles – Web or sheet containing structurally defined element or... – Physical dimension specified
Patent
1978-09-29
1979-08-28
Robinson, Ellis P.
Stock material or miscellaneous articles
Web or sheet containing structurally defined element or...
Physical dimension specified
428332, 428334, 428412, 428424, 428425, 428426, 428522, 428532, B32B 2740, C08G 1832, C09J 504, B29D 702
Patent
active
041661494
ABSTRACT:
The present disclosure is concerned with a novel transparent polyurethane polyurea which is particularly suitable for lamination to glass and glasslike transparent plastics. The polymer is the reaction product of high molecular weight diols, optionally low molecular weight diols, dihydroxy carboxylic acids, diisocyanates with only aliphatically and cycloaliphatically bound isocyanates and organic diamines having aliphatically and cycloaliphatically bound primary amino groups. It has specified contents of carboxyl groups and urea groups, and it has a minimum shear modulus at both 20.degree. and 60.degree. C.
The present disclosure is also concerned with a process for synthesizing such polymers. A preferred method is to react the diisocyanate and hydroxyl bearing compounds to prepare an isocyanate terminated prepolymer and chain extend with the diamine.
Also discussed are the production of film from these polymers by extrusion and solution casting, the production of laminates with glass and glasslike plastics and the laminates so produced. The solution cast or extruded films can be laminated to these substrates by the application of heat and pressure.
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Muller Hanns P.
Oberkirch Wolfgang
Quiring Bernd
Wagner Kuno
Bayer Aktiengesellschaft
Colen Frederick H.
Harsh Gene
Pope Lawrence S.
Robinson Ellis P.
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