The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 28, 1995
Filed:
Oct. 22, 1993
Daniel B Nielson, Brigham City, UT (US);
Dean M Lester, Brigham City, UT (US);
Thiokol Corporation, Ogden, UT (US);
Abstract
Conductive carbon fibrils are incorporated into energetic compositions to enhance the burn rate. The carbon fibrils are grown catalytically from carbon precursors and are substantially free of pyrolytically deposited thermal carbon. The fibrils generally have a length in the range from about 1.mu. to about 10.mu. and a diameter in the range from about 3.5 nanometers to about 75 nanometers. Length to diameter aspect ratios are greater than 5, and typically in the range from about 100:1 to about 1000:1. A 100% improvement in burn rate was observed in compositions containing as little as 0.1 weight percent carbon fibrils. Greater amounts of carbon fibrils (2 weight percent) have increased the burn rate 500%. In most cases, fibril concentration will be in the range from about 0.1 to about 2 weight percent, although greater amounts are possible. The burn rate may be effectively tailored by varying the amount of fibrils added to the composition.