Patent · US Active

Inner coating layer for solid-propellant rocket engines

US11473529B2 · kind B2 · utility

0Cited by

1References

11Claims

0Family size

Assignee

AVIO S.P.A. · IT

Inventors

Daniele Schiariti · Roma, IT
Paolo Bellomi · Roma, IT

Key dates

Filing date	Oct 11, 2018
Grant date	Oct 18, 2022
Priority date	—
Expiry date	Oct 11, 2039

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF05D2300/614
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

An inner coating layer for solid-propellant rocket engines, constituted by a material comprising from 45% to 55% wt. of a a cross-linkable, unsaturated-chain polymer base, from 11% to 13% wt. of silica, from 15% to 25% wt. of vulcanizing agents and plasticizers, from 5% to 7% wt. of aramid fiber and from 10% to 15% wt. of microspheres made of a material selected among glass, quartz and nano clay, having diameter lower than 200 μm, density comprised between 0.30 and 0.34 g/cc and resistance to hydrostatic pressure greater than, or equal to, 4500 psi.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.