# US 7,745,633 B1 · Tetrazole based linear polymers

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- Number: US 7,745,633 B1
- Document ID: US7745633B1
- Status: Granted
- Kind: B1
- Application number: 12/332,221
- Filed: 2008-12-10
- Granted: 2010-06-29
- Earliest claimed: 2005-05-27
- Assignees: The United States of America as represented by the Secretary of the Navy
- Inventors: David J. Irvin; Mark H. Mason
- Web page: https://patentgrep.com/patent/US7745633B1

## CPC

- C08G 18/3842: {containing heterocyclic rings having at least one nitrogen atom in the ring}
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS

## Abstract

A linear isocyanate polymer produced by utilizing an effective amount of tetrazole diol or tetrazole polyol, reacting with an effective amount isocyanate resin, and cooling to room temperature producing a linear polyisocyanate polymer.

## Claims

### Claim 1

A process for preparation of a polymer of structure (VII) comprising:
reacting an isocyanate resin with an effective amount of tetrazole diol of structure (II),
wherein “X” is an alkyl, aryl, or oligoether group, wherein “R” is an alkyl, aryl, or oligoether group, wherein “R” is chemically bonded to N1 or N2, at a temperature from about 50° C. to about 100° C. from about 1 hour to about 48 hours;
wherein said isocyanate resin is of structure (VIII), wherein “Y” is an alkyl, aryl, or oligoether group, wherein “m” is 2-9,
cooling to room temperature; and,
extracting a linear polyisocyanate polymer of structure (VII)
wherein “X” is an alkyl, aryl, or oligoether group, wherein “Y” is an alkyl, aryl, or oligoether group, wherein “m” is 2 to 9, wherein “p” is 5 to 10,000, wherein “R” is an alkyl, aryl, or oligoether group, wherein “R” is chemically bonded to N1 or N2 of said polymer of structure (VII).

### Claim 2 (depends on 1)

The polymer of structure (VII) according to claim 1, wherein “R”, “X” and “Y” include any combination thereof:
R
X
Y
—(CH2)—
—(CH2)—
—(CH2)—
—(CH2)—
—(CH2)—
—(CH2)—
—(CH2)—
—(CH2)—
—(CH2)—

### Claim 3 (depends on 1)

The process according to claim 1, wherein said tetrazole diol is oligoether tetrazole diol or di-oligoether tetrazole diol.

### Claim 4 (depends on 1)

The process according to claim 1, wherein said tetrazole diol is alkylated tetrazole diol or di-alkylated tetrazole diol.

### Claim 5 (depends on 1)

The process according to claim 1, wherein said tetrazole diol is arylated tetrazole diol or di-arylated tetrazole diol.