The synthesis of a near infrared-sensitive tackifier

A general method to prepare near infrared absorbing abietic acid derivatives is described in which the carboxylic acid of abietic acid is sterically hindered, making the seemingly simple esterification of the acid with a functional near infrared dye the most troublesome stage of the synthesis. Optim...

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Bibliographic Details
Published inDyes and pigments Vol. 79; no. 2; pp. 200 - 204
Main Authors Chong, Kenneth C.W., Winnik, Mitchell A., Gong, Lie-zhong, Nowicki, James
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.11.2008
Subjects
Dihydroperimidine
Polymer compatibility
Squairaine dye
Polymer compatibility
Dihydroperimidine
Squairaine dye
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Summary:A general method to prepare near infrared absorbing abietic acid derivatives is described in which the carboxylic acid of abietic acid is sterically hindered, making the seemingly simple esterification of the acid with a functional near infrared dye the most troublesome stage of the synthesis. Optimum results were obtained by constructing the chromophore from components previously attached to abietic acid. The spectral properties of the desired compound both in solution and within polymer films are discussed. The tackifiers increase the near infrared absorption, offering the potential for near infrared-activated hot-melt adhesives.
ISSN:0143-7208
1873-3743
DOI:10.1016/j.dyepig.2008.02.007