Heat insulating ablative-type materials
US5082877A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 30, 1989 |
| Grant date | Jan 21, 1992 |
| Priority date | — |
| Expiry date | Jun 30, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2111/28
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
An ablative-type protective material is provided comprising: PA0 (a) a polymeric compound comprising a plurality of at least a first repeat unit having the form ##STR1## wherein the first repeat unit is present in an amount ranging from about 70 to about 100 mole percent, inclusive and PA0 (b) an aluminum sulfate hydrate of the general formula EQU Al.sub.2 (SO.sub.4).sub.3.nH.sub.2 O PA0 wherein n is an integer from 14 through 18, inclusive and wherein the aluminum sulfate hydrate is present in an amount greater than about 50% by weight of the ablative-type protective material. The resulting composition exhibits an improved resistance to oxidative degeneration as well as improved heat and flame protection times.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.