Difference between revisions of "Hindered amine light stabilizer"

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== Description ==
 
== Description ==
  
A class of [http://cameo.mfa.org/materials/fullrecord.asp?name=antioxidant antioxidant] added to [http://cameo.mfa.org/materials/fullrecord.asp?name=varnish varnishes] and [http://cameo.mfa.org/materials/fullrecord.asp?name=polymer polymers] to minimize photochemical degradation. Hindered amine light stabilizers (HALS) act as a catalyst to deactivate the peroxy radicals. Thus, they are effective without being consumed. Many HALS additives are derivatives of 2,2,6,6-tetramethylpiperidine. (Mills and White 1994).
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A class of [[antioxidant]] added to [[varnish|varnishes]] and [[polymer|polymers]] to minimize photochemical degradation. Hindered amine light stabilizers (HALS) act as a catalyst to deactivate the peroxy radicals. Thus, they are effective without being consumed. Many HALS additives are derivatives of 2,2,6,6-tetramethylpiperidine. (Mills and White 1994).
  
 
== Synonyms and Related Terms ==
 
== Synonyms and Related Terms ==

Revision as of 13:24, 16 January 2014

Description

A class of antioxidant added to varnishes and polymers to minimize photochemical degradation. Hindered amine light stabilizers (HALS) act as a catalyst to deactivate the peroxy radicals. Thus, they are effective without being consumed. Many HALS additives are derivatives of 2,2,6,6-tetramethylpiperidine. (Mills and White 1994).

Synonyms and Related Terms

HALS; Tinuvin 292 [Ciba-Geigy]; Chimasorb 944 [Ciba-Geigy]; Mixxim 57 [Fairmont];

Additional Information

° R.de la Rie, "Polymer Stabilizers. A Survey with Reference to Possible Applications in the Conservation Field" Studies in Conservation 33:9-22,1988. ° J.S. Mills, R.White, The Organic Chemistry of Museum Objects, Butterworth Heinemann, London, 1994.

Authority

  • John S. Mills, Raymond White, The Organic Chemistry of Museum Objects, Butterworth Heineman, London, 2nd ed., 1994
  • External source or communication Comment: R.de la Rie, C.McGlinchy "Stabilized Dammar Picture Varnish" Studies in Conservation 34:137-146

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