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High Performance Lenses/HID Refractors and Fluorescent Tubes From SOLLX TM Resins

IP.com Disclosure Number: IPCOM000010543D
Publication Date: 2002-Dec-13
Document File: 1 page(s) / 24K

Publishing Venue

The IP.com Prior Art Database

Abstract

Lighting lenses and refractors used on HID (high intensity discharge) fixtures are exposed to elevated temperatures and high levels of UV light. The UV irradiation combined with the elevated temperature often causes resin degradation in these lenses and refractors, resulting in discoloration and the loss of their ductility. In many cases, it is desirable that the refractors are resistant to breakage. Breakage can come from either accidental impact from such objects as broom handles, malicious impacts as in the case of stones from vandals or from impacts from gunshots. We have developed resin for refractor products that provide improved resistances to UV light while at the same time maintain high levels of impact strength.

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High Performance Lenses/HID Refractors and Fluorescent Tubes From SOLLXTM Resins

X.Y. Li and Paul Sybert

Lexan Technology, GE Plastics

One Lexan Lane, Mount Vernon, IN 47620

Lighting lenses and refractors used on HID (high intensity discharge) fixtures are exposed to elevated temperatures and high levels of UV light. The UV irradiation combined with the elevated temperature often causes resin degradation in these lenses and refractors, resulting in discoloration and the loss of their ductility. In many cases, it is desirable that the refractors are resistant to breakage.� Breakage can come from either accidental impact from such objects as broom handles, malicious impacts as in the case of stones from vandals or from impacts from gunshots.� We have developed resin for refractor products that provide improved resistances to UV light while at the same time maintain high levels of impact strength.

The refractor is made from a transparent or diffuse resin or blend comprised of resorcinol phthalate units (SOLLXTM resin from GE Plastics).� These resorcinol phthalates undergo a photo fries rearrangement to give an o-hydoxybenzophenone structures or analogs thereof on the surface of the refractor facing the lamp.� The o-hydoxybenzophenone structures serve as screeners to UV radiation.� Examples of resorcinol phthalate containing resins and blends are found in US 6,265,522 , US 5,916,997 and references therein.

Fluorescent lighting is widely used by consumers and industrial applications.� B...