Nitramine oxetanes and polyethers formed therefrom
First Claim
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1. A nitramine oxetane having the formula:
- ##STR9## wherein at least one of R1 and R2 have the formula (CH2)4 --N(NO)2 --A, wherein n is at least 1 and A is --H or an alkyl group, and R2 is (CH2)n --Y wherein Y is ##STR10##
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Abstract
Nitramine oxetanes, specifically 3-methyl nitraminomethyl-3-methyl oxetane and 3,3-Bis (methyl nitraminomethyl) oxetane are synthesized. Polyethers are formed incorporating the nitramine oxetanes, which polyethers are curable with isocyanates to form elastomers suitable for use as binders in propellants or the like.
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Citations
8 Claims
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1. A nitramine oxetane having the formula:
- ##STR9## wherein at least one of R1 and R2 have the formula (CH2)4 --N(NO)2 --A, wherein n is at least 1 and A is --H or an alkyl group, and R2 is (CH2)n --Y wherein Y is ##STR10##
- View Dependent Claims (2)
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3. A polyether having mer units derived from cyclic ethers having the general formula:
- ##STR11## wherein Cp represents saturated ring carbons and p is between 2 and 4, from about 10 molar percent to 100 percent of the mer units being derived from a nitramine oxetane having the formula;
##STR12## wherein at least one of R1 and R2 have the formula (CH2)n --N(NO)2 --A, wherein n is at least 1 and A is --H or an alkyl group, and R2 is (CH2)n --Y wherein Y is ##STR13## - View Dependent Claims (4)
- ##STR11## wherein Cp represents saturated ring carbons and p is between 2 and 4, from about 10 molar percent to 100 percent of the mer units being derived from a nitramine oxetane having the formula;
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5. A elastomer comprising a polyether having mer units derived from cyclic ethers, having the general formula:
- ##STR14## wherein Cp represents saturated ring carbons and p is between 2 and 4, from about 10 molar percent to 100 percent of the mer units being derived from a nitramine oxetane having the formula;
##STR15## wherein at least one of R1 and R2 have the formula (CH2)n --N(NO)2 --A, wherein n is at least 1 and A is --H or an alkyl group, and R2 is (CH2)n --Y wherein Y is --H, alkyl, ##STR16## an isocyanate having a functionality of 2 or greater curing said polyether.
- ##STR14## wherein Cp represents saturated ring carbons and p is between 2 and 4, from about 10 molar percent to 100 percent of the mer units being derived from a nitramine oxetane having the formula;
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6. A propellant composition comprising between about 70 and about 90 wt. % solids, including fuel material particulates and/or oxidizer particulates, balance consisting essentially of a binder system comprising an elastomer and optionally a plasticizer with a plasticizer to elastomer ratio of up to about 2.5:
- 1, said elastomer elastomer comprising a polyether having mer units derived from cyclic ethers, having the general formula;
##STR17## wherein Cp represents saturated ring carbons and p is between 2 and 4, from about 10 molar percent to 100 percent of the mer units being derived from a nitramine oxetane having the formula;
##STR18## wherein at least one of R1 and R2 have the formula (CH2)n --N(NO)2 --A, wherein n is at least 1 and A is --H or an alkyl group, and R2 is (CH2)n --Y wherein Y is --H, alkyl, ##STR19## an isocyanate having a functionality of 2 or greater curing said polyether.
- 1, said elastomer elastomer comprising a polyether having mer units derived from cyclic ethers, having the general formula;
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7. A method of synthesizing a nitramine oxetane comprising providing an oxetane having the general formula:
- ##STR20## wherein at least one of R1 and R2 have the formula (CH2)n --N(NO)2 --A, wherein n is at least 1 and A is --H or an alkyl group, and R2 is (CH2)n --Y wherein Y is --H, alkyl, ##STR21## providing a nitramine salt having the general formula;
M(N(NO2)A)z (z=1-3) wherein M is a cation and A is --H or an alkyl group, andreacting said oxetane and said nitramine salt to produce the corresponding nitramine. - View Dependent Claims (8)
- ##STR20## wherein at least one of R1 and R2 have the formula (CH2)n --N(NO)2 --A, wherein n is at least 1 and A is --H or an alkyl group, and R2 is (CH2)n --Y wherein Y is --H, alkyl, ##STR21## providing a nitramine salt having the general formula;
Specification