Polyurethane layer possessing energy-absorbing properties and it

Details Polyurethane layer possessing energy-absorbing properties and it Polyurethane layer possessing energy-absorbing properties and it

1990-03-20

1991-08-13

Sluby, P. C.

Stock material or miscellaneous articles

Composite

Of polyamidoester

4284256, 528 59, 528 67, B32B 2740, C08G 1810

Patent

active

050395734

ABSTRACT:
A polyurethane-based sheet of high optical quality having energy-absorbing properties, obtained by the reactive pouring or spraying, on a flat, horizontal base, of a reactive mixture of an isocyanate component and a polyhydric alcohol component is disclosed. The ratio of the NCO equivalent isocyanate groups to the OH equivalent groups used in approximately equal to 1. The isocyanate component comprises a mixture of 3-isocyanatomethyl-3,5,5-trimethylcyclohexylisocyanate (isocyanate I) and bis-4-isocyanatocyclohexylmethane (isocyanate II), in a proportion of an isocyanate (I) NCO equivalent of 0.1 to 0.8, and of an isocanate (II) NCO equivalent, with the total NCO equivalent being about 1.
The layer according to the invention is used in laminated glass containing at least one sheet of glass and one layer of a plastic material.

REFERENCES:
patent: 4891271 (1990-02-01), Bravet et al.

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