Stabilization of fluorescent dyes in vinyl articles using hinder

Details Stabilization of fluorescent dyes in vinyl articles using hinder Stabilization of fluorescent dyes in vinyl articles using hinder

1997-10-23

2000-08-29

Thibodeau, Paul

Stock material or miscellaneous articles

Structurally defined web or sheet

Including variation in thickness

428325, 428518, 428522, 524567, 404 94, 264 19, 264 21, B32B 1800, B32B 2730, B29D 1100, E01C 2316

Patent

active

06110566&

ABSTRACT:
A durable colored article having fluorescent properties comprises a substantially solventless polyvinyl chloride matrix, a thioxanthene fluorescent dye, and a secondary or tertiary hindered amine light stabilizer having a molecular weight less than about 1000 grams/mole. The invention has the advantage in that it provides a flexible polyvinyl chloride film that exhibits durable fluorescent colors.

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McMurrer, Marcie, Update: UV Stabilizers, Plastics Compounding (Jan./Feb. 1985), p. 40-47.
Hjertberg, T., & Sorvik, E.M. Thermal Degradation of PVC in Degradation and Stabilisation of PVC (1984) p. 21, 69.
Zhang, Can et al., Hindered Amine Light Stabilizers: Effects of Acid Exposure, vol. 24, Journal of Polymer Science: Part C: Polymer Letters (1986) p. 453.
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