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Hard-coat infused polycarbonate headlamp lens and related method

A polycarbonate, headlight technology, applied in coatings, lenses, headlights, etc., can solve problems such as reducing headlight performance, lens impact performance degradation, and accelerating matrix degradation.

Inactive Publication Date: 2016-06-15
FORD GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it should be appreciated that many vehicles, including vehicles in, for example, the Sun Belt (SunBelt) regions of the United States are exposed to large amounts of UV radiation which over time decomposes the matrix causing yellowing and darkening which reduces the front performance of lighting
Additionally, as the sun's UV rays degrade the substrate, the silica hardcoat may delaminate from the polycarbonate substrate, accelerating substrate degradation
This also leads to degradation of the impact performance of the lens

Method used

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  • Hard-coat infused polycarbonate headlamp lens and related method

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Embodiment Construction

[0017] Referring now to the description of the headlight lens 10 figure 1 . The headlamp lens 10 comprises a polycarbonate base 12 and an impregnated protective outer layer 14 covering at least one surface (i.e., the front surface) of the polycarbonate base and optionally a PECVD (Plasma Enhanced Chemical Vapor Deposition) composition. .

[0018] In one embodiment, the impregnated protective outer layer 14 includes an anti-scratch agent and a UV inhibitor. In one possible embodiment, the anti-scratch agent is polysiloxane based. Such anti-scratch agents may be selected from the group consisting of vinyl (mono-, di- and tri-alkoxysilanes), phenyl (mono-, di- and tri-alkoxysilanes), biphenylbis Alkoxysilane, Vinyltrimethoxysilane, and other polysiloxane-based molecules and mixtures thereof.

[0019] In one embodiment, the UV inhibitor is selected from the group consisting of benzophenones, benzotriazoles, or other compounds like hydroxyphenyltriazines, and mixtures thereof. ...

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Abstract

A headlamp lens includes a polycarbonate substrate and an infused protective skin covering on at least one surface of the polycarbonate substrate.

Description

technical field [0001] The present application relates generally to the field of vehicular equipment, and more particularly to a hardcoat-impregnated polycarbonate lens that is less expensive to produce and offers better properties, including in particular better resistance to Progressive ultraviolet (UV) degradation in order to remain transparent for the free passage of light during the life of the vehicle. Background technique [0002] Currently, headlamp lenses are molded from optically clear polycarbonate. To prevent headlamp lens wear and ultraviolet (UV) weathering degradation, a clear silica hard coat and anti-UV additives are applied to the front surface of the headlamp. Silica hard-coated polycarbonate headlamp lenses provide excellent scratch resistance and excellent impact resistance. However, silica hard-coated polycarbonate headlamp lenses suffer from a number of disadvantages. [0003] More specifically, silica hardcoat processes are very expensive and often...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/04G02B1/14G02B3/00
CPCB29D11/00923F21S41/28G02B1/14B29K2069/00B29D11/00009B29D11/00865B29K2995/0055
Inventor 保罗·肯尼思·德洛克塔拉·卡嫫斯图尔特·C·萨尔特阿尔森·特尔吉马尼安约瑟夫·米什卡
Owner FORD GLOBAL TECH LLC