Ultraviolet light filter element

Details Ultraviolet light filter element Ultraviolet light filter element

2005-03-29

2005-03-29

Buttner, David J. (Department: 1712)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

C524S359000, C524S363000, C524S091000, C524S100000, C524S195000, C106S168010, C106S171100, C106S170470, C106S170100, C428S001100, C428S001500

Reexamination Certificate

active

06872766

ABSTRACT:
Ultraviolet light absorbing polymer film, coating, or molded article UV filter elements are described which comprise a polymer phase having molecularly dispersed therein a) a first ultraviolet absorbing dibenzoylmethane compound of formula (I)where R1 through R5 are each independently hydrogen, halogen, nitro, or hydroyxl, or further substituted or unsubstituted alkyl, alkenyl, aryl, alkoxy, acyloxy, ester, carboxyl, alkyl thio, aryl thio, alkyl amine, aryl amine, alkyl nitrile, aryl nitrile, arylsulfonyl, or 5-6 member heterocylce ring groups, and b) a second ultraviolet light absorbing compound which absorbs ultraviolet light at a wavelength for which the first compound is deficient at absorbing. In particular embodiments, the second ultraviolet light absorbing compound may comprise a hydroxyphenyl-s-triazine, hydroxyphenylbenzotriazole, formamidine, benzoxazinone, or benzophenone compound. In a specific embodiment of the invention, the above UV absorbing compounds are employed in cellulose acetate film for the fabrication of a protective film for polarizers for use in display applications.

REFERENCES:
patent: 3981884 (1976-09-01), Wang et al.
patent: 4043639 (1977-08-01), Matsuyama et al.
patent: 4387089 (1983-06-01), De Polo
patent: 4619956 (1986-10-01), Susi
patent: 4839405 (1989-06-01), Speelman et al.
patent: 5744127 (1998-04-01), Giuseppe et al.
patent: 5783173 (1998-07-01), Bonda et al.
patent: 5788954 (1998-08-01), Bonda et al.
patent: 5806834 (1998-09-01), Yoshida
patent: 5849273 (1998-12-01), Bonda et al.
patent: 5993789 (1999-11-01), Bonda et al.
patent: 6123928 (2000-09-01), Sovak et al.
patent: 6129909 (2000-10-01), Bonda et al.
patent: 6531117 (2003-03-01), Heger et al.
patent: 20020099094 (2002-07-01), Anderson
patent: 0 843 996 (1998-05-01), None
patent: 4-213348 (1992-08-01), None
patent: 04213348 (1992-08-01), None
patent: 07041660 (1995-02-01), None
Abstract, JP 04213348, Nishikawa et al., Aug. 1992.*
Abstact, JP 07041660, Nakamura et al., Feb. 1995.*
U.S. Appl. No. 10/150,836; filed May 17, 2001; titled “Stabilizers System For Polymer Components Of Displays”; of Timothy C. Schunk.
S.-K. Wu, G.-S. Dai, L.-S. Liu and J.-K. Chang; “A Study of the Photo-stabilizing Behaviors of β-Diketones”; Polymer Degradation and Stability; 16; (1986); pp. 169-186.

Affiliated with

Also associated with

Rating

Ultraviolet light filter element does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Ultraviolet light filter element, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ultraviolet light filter element will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3444416