Acrylic and fluoroacrylic polymers for oxygen pressure sensing and pressure-sensitive paints utilizing these polymers
AssigneeUniversity of Washington
InventorsMartin P. Gouterman, W. Brenden Carlson
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Abstract
The preparation and use of acrylic and fluoroacrylic polymers suitable for luminescence oxygen sensing applications are described. These materials can be used in luminophor coatings for optical fiber sensors or as coatings on aerodynamic surfaces for wind tunnel study. Compositions containing these polymers have the advantages of: (1) reduced induction effect; (2) subsecond response times; (3) low photodegradation; and (4) low temperature dependence.
Claims24
A pressure-sensitive paint composition for coating a surface for oxygen pressure sensing applications, said composition consisting essentially of a polymeric binder and an oxygen pressure sensing dye, wherein said binder is selected from the group consisting of:
- A. a fluoroacrylic polymer having the configuration:
- ##STR4## wherein R.sub.3, R.sub.4 and R.sub.5 arc selected from the same or different polyfluorinated alkyl side chains, R.sub.3, R.sub.4 and R.sub.5 occur in random order, and n is a distribution of integers such that 5<n<1000;
- and,
- B. a polyfluorinated acrylic polymer having the configuration:
- ##STR5## wherein at least one of R.sub.3, R.sub.4 and R.sub.5 is selected from the group consisting of perfluorinated or dihydroperfluorinated alkyl side chain and the remaining two side chains are selected from the same or different perfluorinated or dihydroperfluorinated alkyl side chains or polyfluorinated alkyl side chains, R.sub.3, R.sub.4 and R.sub.5 occur in random order, and n is a distribution of integers such that 5<n<1000.
A pressure-sensitive paint composition for coating a surface for oxygen pressure sensing applications, said composition consisting essentially of a polymeric binder and an oxygen pressure-sensing dye, wherein said binder consists essentially of a fluoroacrylic polymer having the configuration:
- ##STR6## herein R.sub.3, R.sub.4 and R.sub.5 are selected from the same or different polyfluorinated alkyl side chains, R.sub.3, R.sub.4 and R.sub.5 occur in random order, and n is a distribution of integers such that 5<n<1000.
A pressure-sensitive paint composition for coating a surface for oxygen pressure sensing applications, said composition consisting essentially of a polymeric binder and an oxygen pressure-sensing dye, wherein said binder consists essentially of a polyfluorinated acrylic polymer having the configuration:
- ##STR7## wherein at least one of R.sub.3, R.sub.4 and R.sub.5 is selected from the group consisting of perfluorinated or dihydroperfluorinated alkyl side chains and the remaining two side chains are selected from the same or different perfluorinated or dihydroperfluorinated alkyl side chains or polyfluorinated alkyl side chains, R.sub.3, R.sub.4 and R.sub.5 occur in random order, and n is a distribution of integers such that 5<n<1000.
A method for measuring the pressure of an oxygen-containing fluid on a surface comprising tie steps of coating a pressure-sensitive paint composition on said surface, exposing said surface to said fluid, and monitoring the resultant quenching of luminescence, wherein said pressure-sensitive paint composition consists essentially of an oxygen pressure-sensing dye dissolved or dispersed in a polymeric binder, said binder being selected from the group consisting of:
- A. a fluoroacrylic polymer having the configuration:
- ##STR8## wherein R.sub.3, R.sub.4 and R.sub.5 are selected from the same or different polyfluorinated alkyl side chains, R.sub.3, R.sub.4 and R.sub.5 occur in random order, and n is a distribution of integers such that 5<n<1000;
- and,
- B. a polyfluorinated acrylic polymer having the configuration:
- ##STR9## wherein at least one of R.sub.3, R.sub.4 and R.sub.5 is selected from the group consisting of perfluorinated or dihydroperfluorinated alkyl side chains and the remaining two side chains are selected from the same or different perfluorinated or dihydroperfluorinated alkyl side chains or polyfluorinated alkyl side chains, and R.sub.3, R.sub.4 and R.sub.5 occur in random order, and n is a distribution of integers such that 5<n<1000.
A method for measuring the pressure of an oxygen-containing fluid on a surface comprising the steps of coating a pressure-sensitive paint composition on said surface, exposing said surface to said fluid, and monitoring the resultant quenching of luminescence, wherein said pressure-sensitive paint composition consists essentially of an oxygen pressure-sensing dye dissolved or dispersed in a polymeric binder, wherein said binder consists essentially of a fluoroacrylic polymer having the configuration:
- ##STR10## wherein R.sub.3, R.sub.4 and R.sub.5 are selected from the same or different polyfluorinated alkyl side chains, R.sub.3, R.sub.4 and R.sub.5 occur in random order, and n is a distribution of integers such that 5<n<1000.
A method for measuring the pressure of an oxygen-containing fluid on a surface comprising the steps of coating a pressure-sensitive paint composition on said surface, exposing said surface to said fluid, and monitoring the resultant quenching of luminescence, wherein said pressure-sensitive paint composition consists essentially of an oxygen pressure-sensing dye dissolved or dispersed in a polymeric binder, wherein said binder consists essentially of a polyfluorinated acrylic polymer having the configuration:
- ##STR11## wherein at least one of R.sub.3, R.sub.4 and R.sub.5 is selected from the group consisting of perfluorinated or dihydroperfluorinated alkyl side chains and the remaining two side chains are selected from the same or different perfluorinated or dihydroperfluorinated alkyl side chains or polyfluorinated alkyl side chains, and R.sub.3, R.sub.4 and R.sub.5 occur in random order, and n is a distribution of integers such that 5<n<1000.
Dependencies are inferred from the claim text.