Hindered amine
Encyclopedia
Hindered amines are chemical compounds containing an amine
functional group
surrounded by a crowded steric environment
. They have uses such as gas scrubbing, as stabilizers against light-induced polymer degradation
, and as reagents for organic synthesis
.
Amine
Amines are organic compounds and functional groups that contain a basic nitrogen atom with a lone pair. Amines are derivatives of ammonia, wherein one or more hydrogen atoms have been replaced by a substituent such as an alkyl or aryl group. Important amines include amino acids, biogenic amines,...
functional group
Functional group
In organic chemistry, functional groups are specific groups of atoms within molecules that are responsible for the characteristic chemical reactions of those molecules. The same functional group will undergo the same or similar chemical reaction regardless of the size of the molecule it is a part of...
surrounded by a crowded steric environment
Steric effects
Steric effects arise from the fact that each atom within a molecule occupies a certain amount of space. If atoms are brought too close together, there is an associated cost in energy due to overlapping electron clouds , and this may affect the molecule's preferred shape and reactivity.-Steric...
. They have uses such as gas scrubbing, as stabilizers against light-induced polymer degradation
Polymer degradation
Polymer degradation is a change in the properties—tensile strength, colour, shape, etc.—of a polymer or polymer-based product under the influence of one or more environmental factors such as heat, light or chemicals such as acids, alkalis and some salts...
, and as reagents for organic synthesis
Organic synthesis
Organic synthesis is a special branch of chemical synthesis and is concerned with the construction of organic compounds via organic reactions. Organic molecules can often contain a higher level of complexity compared to purely inorganic compounds, so the synthesis of organic compounds has...
.
External links
- http://www.specialchem4adhesives.com/tc/uv-light-stabilizers/index.aspx?id=hals Hindered amine light stabilizers
- http://www.exxonmobil.com/refiningtechnologies/fuels/mn_flexsorb.html Gas treating