Ablator compositions

Details Ablator compositions Ablator compositions

1996-03-19

1999-05-18

Marquis, Melvyn I.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

524100, 524298, 524296, 524493, 524496, 524847, C08K7/04

Patent

active

059051019

ABSTRACT:
The invention relates to an ablator composition for providing ablation protection after cure thereof. The. ablator composition includes the components of: (A) 100 parts by weight of a silicone elastomer composition which is curable to a silicone elastomer by addition reaction; (B) 50-200 parts by weight of an amorphous silica having an average diameter from 0.1 to 100 .mu.m; and (C) 1-15 parts by weight of a first fiber having an average length from 0.5 to 6 mm in a longitudinal direction thereof and an average diameter from 1 to 20 .mu.m. The first fiber is at least one of a carbon fiber and a synthetic quartz fiber. An ablating material prepared by curing the ablator composition is superior in heat insulation and substantially low in ablation rate, and thus protects a spacecraft or the like from a high temperature gas, for a long time.

REFERENCES:
patent: 3407110 (1968-10-01), Axelson et al.
patent: 3429838 (1969-02-01), Hersh
patent: 3723481 (1973-03-01), Bobear
patent: 4031059 (1977-06-01), Strauss
patent: 5399599 (1995-03-01), Guillot
patent: 5661198 (1997-08-01), Inatoni et al.

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