Composition for the detection of electrophilic gases and methods of use thereof
First Claim
1. A gel composition for the detection of an electrophilic gas consisting essentially ofa) a Lewis base capable of electrophilic reaction with said gas,b) a dye capable of visibly indicating a color change on protonation or deprotonation,c) a solvent for said dye, said base and said gas, selected from the group consisting of alkanols, arylalkanols, alkyl halides, alkyl ketones, alkylamines, aralkylamines, alkyl esters of alkanoic acids and dimethylsulfoxide,d) a rheology modifier capable of producing a non-newtonian gel of components (a)+(b)+(c)+(d) which is sufficiently translucent to permit visual detection of change of color of (b) and of sufficient pseudoplasticity/thixotropy to provide adhesion to vertical and horizontal surfaces.
8 Assignments
0 Petitions
Accused Products
Abstract
There is provided a composition for the detection of an electrophilic gas, such as chlorodifluoromethane or carbon dioxide, which comprises a Lewis base capable of removing a proton from the gas or reacting therewith in a similar electrophilic manner; a dye capable of visibly indicating a color change on protonation or deprotonation; a solvent for the dye, the base and the gas; and a rheology modifier capable of producing a non-newtonian gel of all of these components which is sufficiently translucent to permit visual detection of change of color of the dye and of sufficient pseudoplasticity/thixotropy to provide adhesion to vertical and horizontal surfaces.
-
Citations
16 Claims
-
1. A gel composition for the detection of an electrophilic gas consisting essentially of
a) a Lewis base capable of electrophilic reaction with said gas, b) a dye capable of visibly indicating a color change on protonation or deprotonation, c) a solvent for said dye, said base and said gas, selected from the group consisting of alkanols, arylalkanols, alkyl halides, alkyl ketones, alkylamines, aralkylamines, alkyl esters of alkanoic acids and dimethylsulfoxide, d) a rheology modifier capable of producing a non-newtonian gel of components (a)+(b)+(c)+(d) which is sufficiently translucent to permit visual detection of change of color of (b) and of sufficient pseudoplasticity/thixotropy to provide adhesion to vertical and horizontal surfaces.
- 14. A gel composition for the detection of an electrophilic gas consisting essentially of sodium hydroxide, dimethyl sulfoxide, and a member selected from the group consisting of hydroxyethyl cellulose, polyvinylalcohol and sodium alginate, and a dye capable of visibly indicating a color change on protonation or deprotonation.
Specification