Acrylic flexible light pipe of improved thermal stability

Details Acrylic flexible light pipe of improved thermal stability Acrylic flexible light pipe of improved thermal stability

C - Chemistry, Metallurgy

08

L

C08L 33/06 (2006.01) B29C 47/06 (2006.01) B29D 11/00 (2006.01) C08K 3/18 (2006.01) G02B 1/04 (2006.01)

Patent

CA 2217126

Acrylic light pipe as described in Bigley et al., U. S. Patents 5,406,641 and 5,485,541, has adequate thermal stability for many purposes. It has been found that improved thermal stability, as reflected in color formation, can be imparted by adjusting the polymerization conditions to produce the uncured core polymer of the core/clad construction with a much reduced terminal vinyl content, preferably below 0.5 vinyl groups/ 1000 monomer units.

Les fibres optiques en acrylique décrites dans Bigley et al., brevets américains 5,406,641 et 5,485,541, ont une stabilité thermique appropriée à plusieurs utilisations. Une stabilité thermique améliorée, révélée par la teinte obtenue, peut être réalisée en créant des conditions de polymérisation donnant une âme polymère non réticulée de fibre composite âme/gaine ayant une teneur en vinyle terminal réduite de beaucoup, de préférence en deçà de 0,5 par 1000 unités monomères.

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