Sprayable low density ablator and application process

US4077921A · kind A · utility

Assignee

• The United States of America as represented by the Administrator of the National Aeronautics and Space Administration · US

Inventors

• Max H. Sharpe · Huntsville, US
• William E. Hill · Auburn, US
• William G. Simpson · Huntsville, US
• James M. Carter · Las Cruces, US
• Edwin L. Brown · Hudson, US
• Harry M. King, JR. · Webster, US
• Paul H. Schuerer · Huntsville, US
• David D. Webb · Hueytown, US

Key dates

• Filing date: Jan 19, 1977
• Grant date: Mar 7, 1978
• Expiry date: Jan 19, 1997

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2375/04
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A sprayable, low density ablative composition consisting essentially of: A. 100 parts by weight of a mixture of 25-65% by weight of phenolic microballoons, PA1 0-20% by weight of glass microballoons, PA1 4-10% by weight of glass fibers, PA1 25-45% by weight of an epoxy-modified polyurethane resin, PA1 2-4% by weight of a bentonite dispersing aid and PA1 1-2% by weight of an alcohol activator for the bentonite; B. 1-10 parts by weight of an aromatic amine curing agent; and C. 200-400 parts by weight of a solvent.