VIBRATION ABSORBING LAMELLAR MATERIAL Russian patent published in 1994 - IPC

FIELD: radio-instrument making. SUBSTANCE: intermediate layer of material is manufactured of polyurethane prepared on the base of polyoxypropylenetriol (its molecular weight being 5000, tail oxyethyl groups content being 10 mass % ), diethylene glycol and mixture containing product or reaction of toluilenediisocyanate with polyoxypropylene glycol (its molecular weight being 1000) and polyisocyanate (their mass ratio being 90-98: 10-2 respectively). Inner layers may be manufactured of various materials including metal. EFFECT: improves desired product quality. 1 tbl, 3 dwg