Back to results
US 6,110,566 AGranted
Stabilization of fluorescent dyes in vinyl articles using hindered amine light stabilizers
Assignee3M Innovative Properties Company
InventorsKenneth M. White, Lee A. Pavelka, Vera L. Lightle, James C. Coderre
Life of this patent
Estimating the term…
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.
Claims25
An article exhibiting durable color and fluorescent properties comprising:
- (a) a polymeric matrix that contains a substantially solventless polyvinyl chloride resin;
- (b) a thioxanthene fluorescent dye;
- and
- (c) a hindered amine light stabilizer comprising at least one secondary or tertiary amine groups and having a molecular weight less than about 1000 grams/mole.
1 more element
A method of making an article exhibiting durable color and fluorescent properties comprising:
- (a) combining substantially solventless polyvinyl chloride resin, a thioxanthene fluorescent dye, and a hindered amine light stabilizer comprising at least one secondary or tertiary amine groups having a molecular weight less than 1000 grams/mole into a mixture;
- and
- (b) forming the article from the mixture.
Dependencies are inferred from the claim text.