Heat barrier material and process (US Patent 3,692,682, 1972)

Carlo Re, Earl O. Conrad and Jack R. Conrad received US Patent No. 3,692,682 on September 19, 1972, filed December 18, 1969. It was assigned to Dyna-Shield Inc.

The patent's abstract:

AN IMPROVED MATERIAL IS PROVIDED WHICH SERVES AS A PROTECTIVE BARRIER FOR EXPLOSIVES, OR OTHER COMBUSTIBLE PRODUCTS, AND WHICH MAY BE APPLIED, FOR EXAMPLE, AS A PASTE OR A LIQUID, TO THE EXTERNAL OR INTERNAL SURFACE OF THE CASING CONTAINING THE EXPLOSIVE, TO CREATE A HARD COATING FOR THE CASING OF EXTREMELY LOW HEAT TRANSFER CHARACTERISTICS AND LOW HEAT RATE TRANSFER CHARACTERISTICS. ALTHOUGH THE COATING WILL BE DESCRIBED HEREIN IN SUCH AN ENVIRONMENT, IT WILL BE EVIDENT AS THE DESCRIPTION PROCEEDS, THAT IT MAY BE USED IN ANY APPLICATION IN WHICH A HEAT BARRIER IS REQUIRED FOR PROTECTIVE, OR OTHER PURPOSES. THE MATERIAL IS COMPOSED OF A MIXTURE OF WATER-EXTENDED POLYESTER (WEP) AND PARTICLES OF A HEAT PROOFING MATERIAL, SUCH AS POWDERED OR FIBROUS ASBESTOS, OR POWDERED GLASS. AN IMPROVED PROCESS AND APPARATUS FOR APPLYING THE MATERIAL IS ALSO PROVIDED.

Where it was listed

• Asbestos, March 1973, in its patents department (the year's issues)