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US 2010/0160573 A1Published application
Linear amine functionalized poly(trimethylene ether) compositions
AssigneeE. I. Du Pont de Nemours and Company
InventorsKAI QI, HARI BABU SUNKARA
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Abstract
The present invention relates to linear amine-functionalized poly(trimethylene ether) compositions, and processes to produce these compositions.
Claims7
A poly(trimethylene ether)diamine of the formula
- wherein n is 4 to 170.
A process for making a poly(trimethylene ether)diamine of the formula
- comprising:
- a) converting the chain-end hydroxyl groups of poly(trimethylene ether)glycol of the formula
- to better leaving groups to form a compound of formula
- where Z is selected from the group consisting of mesylate (—OMs), tosylate (—OTs), nosylate (—ONs), brosylate (—OBs), triflate (—OTf), nonaflate, tresylate and iodide (—I).
- b) combining the compound of step (a) with anhydrous ammonia, or a mixture of aqueous ammonia and a solvent, under a pressure of about 15 to 500 psi at a temperature of 25 to 150° C. to form a poly(trimethylene ether)diamine of the formula
- wherein n is 4 to 170.
3 more elements
A process for making a poly(trimethylene ether)diamine of the formula
- comprising:
- a) converting the chain-end hydroxyl groups of poly(trimethylene ether)glycol of the formula
- to nitrile groups to form a nitrile-terminated poly(trimethylene ether) of formula
- b) reducing the nitrile-terminated poly(trimethylene ether) in the presence of hydrogen and catalyst at a temperature of 50 to 250° C. under pressure of 80 to 4000 psi to form a poly(trimethylene ether)diamine of the formula
- wherein n is 4 to 170.
2 more elements
Dependencies are inferred from the claim text.