Energy absorbing elastomers and composites

Details Energy absorbing elastomers and composites Energy absorbing elastomers and composites

1980-05-19

1982-08-24

Cockeram, H. S.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From reactant having at least one -n=c=x group as well as...

428 71, 4283193, 4284233, 4284242, 521 51, 521110, 521112, 521174, 528 44, 528 76, 528 77, 528906, C08G 1848, C08G 1818

Patent

active

043462057

ABSTRACT:
A novel elastomer having a very low compression set and a very slow recovery from compression comprises a flexible polyurethane of essentially linear structure containing unsatisfied hydroxyl groups, and is the reaction product of substantially linear polyols having hydroxyl end groups and an average molecular weight in the range 600 to 1200, with an aromatic isocyanate in less than stoichiometric amount. This elastomer can be used as one layer of an energy-absorbing material, in combination with a more difficultly compressible layer comprising a tough flexible polymeric matrix having a plurality of rigid hollow bodies embedded therein.

REFERENCES:
patent: 3049515 (1962-08-01), Damusis
patent: 3061556 (1962-10-01), Gemeinhardt
patent: 3067149 (1962-12-01), Dombrow et al.
patent: 3072582 (1963-01-01), Frost
patent: 3905925 (1975-09-01), Vervloet
patent: 4057595 (1977-11-01), Rauner et al.

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