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:
Apr. 21, 1981
Filed:
Mar. 05, 1974
Applicant:
Inventors:
Raymond M Price, Hollister, CA (US);
Russell Reed, Jr, Ridgecrest, CA (US);
Assignee:
Thiokol Corporation, Newtown, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C06B / ;
U.S. Cl.
CPC ...
149 194 ; 102 / ; 102103 ; 149 92 ;
Abstract
The water and oil resistance of caseless gun propellant compositions of the type which comprise cyclotetramethylenetetramine (HMX) as the high energy component and polyurethane as the binder are improved by preparing the binder by reaction of isocyanates with a hydroxyl-terminated block copolymer of ethylene oxide and propylene oxide or mixture of the block copolymer with other hydroxyl-terminated polyalkylene oxides. The block copolymer preferably contains from 40% to 60% by weight of ethylene oxide units and comprises at least 15% by weight of the binder.