초록 ▼

This invention relates to novel multifunctional oxetanes, i.e., compounds having multiple oxetane groups, which are useful as initiators in the preparation of star polymers and polymer cascades containing energetic groups. In addition, this invention relates to a process for the preparation of star

This invention relates to novel multifunctional oxetanes, i.e., compounds having multiple oxetane groups, which are useful as initiators in the preparation of star polymers and polymer cascades containing energetic groups. In addition, this invention relates to a process for the preparation of star polymers and polymer cascades, whereby novel multifunctional oxetanes act as initiators in the formation of theses polymers. The reaction of these initiators with various propagating, high-energy oxetanes, such as 3,3-bis-(azidomethyl)oxetane (BAMO) and 3-nitratomethyl-3-methyloxetane (NMMO), gives star polymers with varying molecular weights and functionalities. The star polymers and polymer cascades of the present invention are useful as binders in high-energy formulations.

대표청구항 ▼

A process for the preparation of a star polymer, said process comprising: (a) forming an initiator compound by reacting a preinitiator precursor with a catalyst, said preinitiator precursor being an organic compound that forms an adduct with said catalyst, and said catalyst being a substance that ca

A process for the preparation of a star polymer, said process comprising: (a) forming an initiator compound by reacting a preinitiator precursor with a catalyst, said preinitiator precursor being an organic compound that forms an adduct with said catalyst, and said catalyst being a substance that causes cationic polymerization; (b) combining said initiator compound with a multioxetane compound to form an initiating species; said multioxetane compound having the general formula [Figure] in which: R1 and R2 are members independently selected from the group consisting of H, lower alkyl, lower alkoxy, Br, Cl, I, NF2, ONO2, NO2, N3, and N(R3)NO2, where R3 is H or a lower alkyl; and n is an integer having a value ranging from 1 to 8; (c) contacting said initiating species with a monomer that undergoes cationic polymerization; and (d) allowing polymerization to proceed by chain elongation until the supply of available monomer is substantially exhausted.