Vapor deposition of solid oligomers

Details Vapor deposition of solid oligomers Vapor deposition of solid oligomers

2006-02-28

2006-02-28

Teskin, Fred (Department: 1713)

Coating processes

Coating by vapor, gas, or smoke

Organic coating applied by vapor, gas, or smoke

C427S294000, C427S398100, C427S398200, C425S378100, C118S715000, C118S730000

Reexamination Certificate

active

07005161

ABSTRACT:
A monomer is selected to produce a polymeric film having desirable characteristics for a particular application. The monomer is ppolymerized under controlled conditions to produce a solid oligomer having those characteristics at a molecular weight suitable for evaporation under vacuum at a temperature lower than its thermal decomposition temperature. The process of polymerization to produce the oligomer is carried out under conditions that yield a finite molecular-chain length with no residual reactive groups. The solid oligomer so produced is extruded as a film onto a revolving drum (38) in the evaporation section (40) of a vapor deposition chamber, and then cryocondensed on a cold substrate (44) to form a solid film having the same characteristic selected in the solid oligomer constituting the starting material. As a result of the initial complete reaction to produce the oligomer, the thin-film product does not contain unreacted groups and all attendant disadvantages are avoided.

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E. Rebourt et al., “Polyanaline Oligomers; Synthesis and Characterization,” Synthetic Metals 84 (1997) 65-66.
K. Matyjaszewski et al., “Synthesis of Well-Defined Polyacrylonitrile by Atom Transfer Radical Polynerization,” Macromolecules, vol. 30, No. 20, 1997.

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