Energy absorbing materials

Details Energy absorbing materials Energy absorbing materials

1976-10-29

1978-07-18

Ansher, Harold

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

252 62, 296 31P, 428308, 428310, 428315, 428325, 428425, B32B 2740, B32B 2708

Patent

active

041017048

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 a substantially linear polyol having hydroxyl end groups and a molecular weight in the range 6000 to 12000, with an 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.

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patent: 4017656 (1977-04-01), Lasman et al.
patent: 4021589 (1977-03-01), Copley
patent: 4025686 (1977-05-01), Zion

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