Radical Scaveging Mechanism of Distearyl Hydroxylamine Antioxidant

Ohkatsu, Yasukazu; Baba, Rie; Watanabe, Keiji

doi:10.1627/jpi.54.15

Cited by 5 publications

(2 citation statements)

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“…Hindered amine light stabilizers (e.g. HALS) are free radical scavengers [21]. Although they do not absorb UV light, they trap and deactivate the free radicals generated, preventing photochromic dyes from being degraded.…”

Section: Resultsmentioning

confidence: 99%

Photostability and Durability Properties of Photochromic Organosilica Coating on Fabric

Parhizkar

Zhao

Wang

et al. 2014

Journal of Engineered Fibers and Fabrics

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Photochromic fabrics were prepared by a dipcoating method using a silica sol-gel solution containing photochromic dyes. The coated fabric showed a rapid photochromic response. Three methods; incorporating a UV stabilizer in the coating layer, hydrophobic treatment of the porous surface, and covering the coating layer with an additional silica layer; were used to improve the photostability and durability. All three treatments improved the photostability without noticeably changing the photochromic response/fading speeds. Most of the treatments reduced the washing and abrasion durability. The extra coating layer increased the fabric rigidity.

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Section: Resultsmentioning

confidence: 99%

Photostability and Durability Properties of Photochromic Organosilica Coating on Fabric

Parhizkar

Zhao

Wang

et al. 2014

Journal of Engineered Fibers and Fabrics

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“…Furthermore, the continuously increasing performance criteria in the industry, such as increased processing temperatures (up to 300 o C), increased residence times, or in creased shear forces in the extruder, require even more active stabilization systems. Significant improvements were achieved in the early 1990s with N,Ndioctadecyl hydroxylamine [22] 5 and Vitamin E 6, which are both better Hdonors than de rivatives of 2,6ditbutylphenol. Good results are also achieved using monoac rylates of sterically hindered bisphenols, e.g.…”

Section: Development Of Novel 3-arylbenzofuranone Processing Stabilizersmentioning

confidence: 99%

Radicals and Polymers

Nesvadba¹

2018

Chimia

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This article describes some selected results of my 30 years as an industrial researcher. During this time, I had the chance to work on many very different projects. About two thirds of them were dealing with the fascinating interaction of radicals and polymers. Of the more than 350 million tons of industrial polymers produced worldwide every year, about 50% are made by the radical polymerization of monomers that are often stabilized against undesired premature polymerization by addition of polymerization inhibitors. Stabilizers are necessary to protect the majority of polymeric materials during their service life from radical degradation processes triggered by oxygen, heat or light. Modification of the polymeric architecture can be easily achieved via radical polymer analogous reactions. One of the most important developments in polymer science in the last 25 years is controlled radical polymerization. Recently, radical bearing redox-active polymers emerged as promising in energy storage applications, for example, in organic radical batteries. Our contributions to the fields mentioned above are described with examples of: a) novel benzofuranone stabilizers for polymers; b) the serendipidous discovery of novel dyestuffs; c) eco-friendly polymerization inhibitors; d) novel nitroxides and alkoxyamines for the first industrial realization of controlled radical polymerization; e) novel and safe radical initiators; f) nitroxide radicals bearing polymers for electrochemical applications.

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