CA2273694A1 - A mirror pane especially for rearview mirror for motor vehicles - Google Patents
A mirror pane especially for rearview mirror for motor vehicles Download PDFInfo
- Publication number
- CA2273694A1 CA2273694A1 CA 2273694 CA2273694A CA2273694A1 CA 2273694 A1 CA2273694 A1 CA 2273694A1 CA 2273694 CA2273694 CA 2273694 CA 2273694 A CA2273694 A CA 2273694A CA 2273694 A1 CA2273694 A1 CA 2273694A1
- Authority
- CA
- Canada
- Prior art keywords
- coating
- mirror
- accord
- mirror pane
- pane
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 238000000576 coating method Methods 0.000 claims abstract description 48
- 239000011248 coating agent Substances 0.000 claims abstract description 43
- 239000011253 protective coating Substances 0.000 claims abstract description 18
- 239000011521 glass Substances 0.000 claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000002114 nanocomposite Substances 0.000 claims abstract description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 9
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 9
- 229910052804 chromium Inorganic materials 0.000 claims description 9
- 239000011651 chromium Substances 0.000 claims description 9
- 229910052709 silver Inorganic materials 0.000 claims description 9
- 239000004332 silver Substances 0.000 claims description 9
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- 239000004033 plastic Substances 0.000 claims description 2
- 229920003023 plastic Polymers 0.000 claims description 2
- 230000002093 peripheral effect Effects 0.000 description 10
- 239000000463 material Substances 0.000 description 6
- 239000003518 caustics Substances 0.000 description 4
- 230000002940 repellent Effects 0.000 description 4
- 239000005871 repellent Substances 0.000 description 4
- 239000007921 spray Substances 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000004922 lacquer Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229920005372 Plexiglas® Polymers 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000035508 accumulation Effects 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000003618 dip coating Methods 0.000 description 1
- 239000006119 easy-to-clean coating Substances 0.000 description 1
- 230000004313 glare Effects 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000002310 reflectometry Methods 0.000 description 1
- 230000001846 repelling effect Effects 0.000 description 1
- 239000006120 scratch resistant coating Substances 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000004528 spin coating Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Landscapes
- Optical Elements Other Than Lenses (AREA)
- Rear-View Mirror Devices That Are Mounted On The Exterior Of The Vehicle (AREA)
- Mirrors, Picture Frames, Photograph Stands, And Related Fastening Devices (AREA)
Abstract
A mirror pane suitable for use on rearview mirrors for motor vehicles includes a front and a back side, a carrier plate, a reflection coating applied on the carrier plate, and at least one side formed by the reflection coating and the glass plate, and a dirt and water repellant protective coating applied to the front side as the outermost coating. The coating may be an inorganic-organic nano-composite, gradient coating with fluoridized organic side chains.
Description
A mirror pane especially for rearvieyv mirror for motor vehicles Description The invention is concerned with a mirror pane, especially for rearview mirrors of motor vehicles as well as a rearview mirror system with a mirror pane of this type.
It is known, from the technology of aviation, to coat the cockpit windshield pane with a water repellent coating. This water repellent coating prevents the buildup of streaking and because of the high air speed of airplanes, the line of sight for the pilot remains clear. Also, in the field of sanitary engineering, coatings for Plexiglas walls and shower enclosures, etc. are offered, which are dirt repellent and ease the cleaning thereof.
Mirror panes of rearview mirrors in motor vehicles collect dirt because of their exposed location from rain and the spray attendant therewith, this having the result that clear view is obstructed. This obstruction of sight must repeatedly be removed by manual cleaning. This frequent wiping leads to a deepened deposit of dirt and other corrosive substances in the peripheral areas of the mirror pane. In these peripheral areas various layers on a mirror pane extend outwardly, beyond the glass and so this peripheral area is especially subject to corrosion. This is particularly true in regard to the mirrors employing silver as a back side reflection layer. A need is now recognized, in the case of mirror panes, tn reduce the buildup of dirt in the peripheral areas.
Hence, because of the above, the purpose of the invention is to make available a mirror pane, especially for rearview mirrors of motor vehicles in which an unwantedly large deposit of dirt and corrosive substances in the peripheral areas is prevented.
Further, it is a purpose of the present invention, to make available a rearview mirror with a mirror pane of the type described.
The achievement of these purposes can be accomplished by means of the features of Claims 1 and 2.
By coating the mirror pane with a known dirt and water repelling protective coatm~, following the practice of sanitary and flight technology, the point reached is, that the Pg. 2 spray water pearlets coalesce into large drops, although the front of the mirror pane is facing away from the direction of travel and thus not encountering the passing air stream.
By this coalescing into large drops, the dirt and other corrosive substances remain in suspension or solution in the rain water to be entrained in the passing wind and removed from the peripheral areas. A collective agglomeration of the corrosive substances in the said peripheral areas is thereby prevented.
Moreover, it has been counter intuitively determined, that these known protective coatings are very resistant to scratching and also easier to free from frost and ice accumulations.
Set forth as especially well adapted for such protective coatings, the firm INM
(Institute for New Materials, gem. GmbI-i~ has developed and marketed an inorganic, nano-composite, gradiated layer coating with fluoridized organic side chains, which are presented as "Easy-to-clean-coatings". Coatings using this material are optically transparent, exhibit a high LTV stability as well as a high scratch and abrasion resistance.
This material is amenable to application by conventional means, such as dip, spray, or spin coatings, with subsequent photochemical andlor thermal hardening.
The protective coating is applied to the front side of the mirror pane as the outermost film. It is equally adapted for both the front mirror surface and the back mirror surface. In the case of chromium being the reflectant coated material then, simultaneously; the scratch resistance is substantially increased. With this situation, it becomes possible to install this kind of a front mirror surface in the realm of commercial vehicles. The advantage of the smaller reflectivity and the thereby improved freedom from glare can be attained with this material without an accompanying loss in scratch resistance.
The advantage of the lesser degree of dirt accretion is naturally also valid in the case of back sided mirrors with chromium or silver as a reflecting coating.
In accord with a particularly advantageous embodiment of the invention, the protective coating is also brought over the peripheral sides of the mirror pane, whereby the interstitial space between the glass plate and the reflection coatinj are sealed and thus Pg. 3 protected. This is particularly important with back sided surface mirror having silver as a reflecting means, since these mirrors corrode very easily if the border coating at the periphery is not protected. Usually, in the case of known back surface mirrors with silver as the reflecting agent, these sensitive border coatings are covered with a protective coating and sealed. In accord with the present invention, with the mirror, simultaneously a dirt and water repellant coating is placed on the front side and a sealing of the said peripheral zone at the edges is achieved. The application of an additional protective coating on the peripheral edges at the sides then becomes superfluous.
As a carrier plates, both glass and plastic plates can be considered. Where a reflecting coating is being thought of and because of the high scratch resistance of the protective coating, besides chromium, installations can even be made with the softer and more sensitive aluminum and sensitive interference coatings.
Further details, features and advantages of the invention will be evident from the following description of preferred embodiments with reference to the drawings.
There is shown in:
Fig. 1 a section view through the mirror pane of a front surface mirror with chromium as the reflecting coating and Fig. 2 a sectional presentation through the mirror pane of a back surface mirror with silver as the reflecting coating.
Fig. 1 shows a section through a front surface type of a mirror pane which is in accord with the present invention. This mirror pane exhibits a front side 2, this being the side which will be observed, arid a back side 4. A glass plate 6 possesses a front and a back main surfaces 8 and 9 as well as sides 10. The side 10 possesses beveled edge areas 12 and 13, these being designated respectively as "upper" and "lower".
On the glass of the first main surface 8 is applied a coating (14) of chromium for the reflecting means, that is to say, the reflection coating 14 is on the front side of the minor pane, so that the mirror may be designated as a "front surface mirror". A
protective coating 16 is applied as the outermost coating on the front side 2, which is comprised of a dirt and water repellant material. The protective coating 16, in this case, is e;ctended Pg. 4 from the front side 2 over the upper beveled area 12 of the side. In this way, the protective coating 16 also protects the border zone in which the chromium coating 14 and the glass plate 8 form the upper beveled edge 12. Because of the scratch resistant coating upon this inherently scratch sensitive chromium coating 14 of the front mirror surface, the installation of this mirror becomes possible for motor vehicles and for commercial motor vehicles.
Fig. 2 shows a second advantageous embodiment of the invention in the form of a mirror pane for a back surface mirror with silver as the reflection coating.
The mirror, in accord with this second embodiment, includes likewise a glass plate 6, with a front main surface 8 and a back main surface 9. The sides 10 thereof possesses beveled edge areas 12 and 13. On the back main surface 9 is applied, respectively, a silver coating 20, on top of this a copper coating 22, thereupon a lacquer base coating and finally a coating of covering lacquer 26. The glass plate 6 in the area of the second main surface 9 and the coatings 20 to 26 form the under located beveled edge 13. On the upper main surface 8 once again a protective coating 28 is applied to the glass plate, which coating 28 also covers the side 10 including the beveled edge 12 and 13.
In this way, with one operational step, and with one protective coating 28, not only the front side 2 of the mirror plate, that is the main surface 8 of the glass plate 6, but also the corrosion sensitive sides 10, especially the under beveled edge 13 are provided with a dirt and water repellent coating.
It is known, from the technology of aviation, to coat the cockpit windshield pane with a water repellent coating. This water repellent coating prevents the buildup of streaking and because of the high air speed of airplanes, the line of sight for the pilot remains clear. Also, in the field of sanitary engineering, coatings for Plexiglas walls and shower enclosures, etc. are offered, which are dirt repellent and ease the cleaning thereof.
Mirror panes of rearview mirrors in motor vehicles collect dirt because of their exposed location from rain and the spray attendant therewith, this having the result that clear view is obstructed. This obstruction of sight must repeatedly be removed by manual cleaning. This frequent wiping leads to a deepened deposit of dirt and other corrosive substances in the peripheral areas of the mirror pane. In these peripheral areas various layers on a mirror pane extend outwardly, beyond the glass and so this peripheral area is especially subject to corrosion. This is particularly true in regard to the mirrors employing silver as a back side reflection layer. A need is now recognized, in the case of mirror panes, tn reduce the buildup of dirt in the peripheral areas.
Hence, because of the above, the purpose of the invention is to make available a mirror pane, especially for rearview mirrors of motor vehicles in which an unwantedly large deposit of dirt and corrosive substances in the peripheral areas is prevented.
Further, it is a purpose of the present invention, to make available a rearview mirror with a mirror pane of the type described.
The achievement of these purposes can be accomplished by means of the features of Claims 1 and 2.
By coating the mirror pane with a known dirt and water repelling protective coatm~, following the practice of sanitary and flight technology, the point reached is, that the Pg. 2 spray water pearlets coalesce into large drops, although the front of the mirror pane is facing away from the direction of travel and thus not encountering the passing air stream.
By this coalescing into large drops, the dirt and other corrosive substances remain in suspension or solution in the rain water to be entrained in the passing wind and removed from the peripheral areas. A collective agglomeration of the corrosive substances in the said peripheral areas is thereby prevented.
Moreover, it has been counter intuitively determined, that these known protective coatings are very resistant to scratching and also easier to free from frost and ice accumulations.
Set forth as especially well adapted for such protective coatings, the firm INM
(Institute for New Materials, gem. GmbI-i~ has developed and marketed an inorganic, nano-composite, gradiated layer coating with fluoridized organic side chains, which are presented as "Easy-to-clean-coatings". Coatings using this material are optically transparent, exhibit a high LTV stability as well as a high scratch and abrasion resistance.
This material is amenable to application by conventional means, such as dip, spray, or spin coatings, with subsequent photochemical andlor thermal hardening.
The protective coating is applied to the front side of the mirror pane as the outermost film. It is equally adapted for both the front mirror surface and the back mirror surface. In the case of chromium being the reflectant coated material then, simultaneously; the scratch resistance is substantially increased. With this situation, it becomes possible to install this kind of a front mirror surface in the realm of commercial vehicles. The advantage of the smaller reflectivity and the thereby improved freedom from glare can be attained with this material without an accompanying loss in scratch resistance.
The advantage of the lesser degree of dirt accretion is naturally also valid in the case of back sided mirrors with chromium or silver as a reflecting coating.
In accord with a particularly advantageous embodiment of the invention, the protective coating is also brought over the peripheral sides of the mirror pane, whereby the interstitial space between the glass plate and the reflection coatinj are sealed and thus Pg. 3 protected. This is particularly important with back sided surface mirror having silver as a reflecting means, since these mirrors corrode very easily if the border coating at the periphery is not protected. Usually, in the case of known back surface mirrors with silver as the reflecting agent, these sensitive border coatings are covered with a protective coating and sealed. In accord with the present invention, with the mirror, simultaneously a dirt and water repellant coating is placed on the front side and a sealing of the said peripheral zone at the edges is achieved. The application of an additional protective coating on the peripheral edges at the sides then becomes superfluous.
As a carrier plates, both glass and plastic plates can be considered. Where a reflecting coating is being thought of and because of the high scratch resistance of the protective coating, besides chromium, installations can even be made with the softer and more sensitive aluminum and sensitive interference coatings.
Further details, features and advantages of the invention will be evident from the following description of preferred embodiments with reference to the drawings.
There is shown in:
Fig. 1 a section view through the mirror pane of a front surface mirror with chromium as the reflecting coating and Fig. 2 a sectional presentation through the mirror pane of a back surface mirror with silver as the reflecting coating.
Fig. 1 shows a section through a front surface type of a mirror pane which is in accord with the present invention. This mirror pane exhibits a front side 2, this being the side which will be observed, arid a back side 4. A glass plate 6 possesses a front and a back main surfaces 8 and 9 as well as sides 10. The side 10 possesses beveled edge areas 12 and 13, these being designated respectively as "upper" and "lower".
On the glass of the first main surface 8 is applied a coating (14) of chromium for the reflecting means, that is to say, the reflection coating 14 is on the front side of the minor pane, so that the mirror may be designated as a "front surface mirror". A
protective coating 16 is applied as the outermost coating on the front side 2, which is comprised of a dirt and water repellant material. The protective coating 16, in this case, is e;ctended Pg. 4 from the front side 2 over the upper beveled area 12 of the side. In this way, the protective coating 16 also protects the border zone in which the chromium coating 14 and the glass plate 8 form the upper beveled edge 12. Because of the scratch resistant coating upon this inherently scratch sensitive chromium coating 14 of the front mirror surface, the installation of this mirror becomes possible for motor vehicles and for commercial motor vehicles.
Fig. 2 shows a second advantageous embodiment of the invention in the form of a mirror pane for a back surface mirror with silver as the reflection coating.
The mirror, in accord with this second embodiment, includes likewise a glass plate 6, with a front main surface 8 and a back main surface 9. The sides 10 thereof possesses beveled edge areas 12 and 13. On the back main surface 9 is applied, respectively, a silver coating 20, on top of this a copper coating 22, thereupon a lacquer base coating and finally a coating of covering lacquer 26. The glass plate 6 in the area of the second main surface 9 and the coatings 20 to 26 form the under located beveled edge 13. On the upper main surface 8 once again a protective coating 28 is applied to the glass plate, which coating 28 also covers the side 10 including the beveled edge 12 and 13.
In this way, with one operational step, and with one protective coating 28, not only the front side 2 of the mirror plate, that is the main surface 8 of the glass plate 6, but also the corrosion sensitive sides 10, especially the under beveled edge 13 are provided with a dirt and water repellent coating.
Claims (12)
- Pg. 5 Claimed is:
A mirror pane, especially for rearview mirrors for motor vehicles, with a front and a back side (2, 4), a carrier plate (6), a reflection coating (14, 20) applied on said carrier plate (6) and at least one side (10) formed by the reflection coating (14, 20) and the glass plate (6), therein characterized, in that a dirt and water repellant protective coating (16, 28) is applied to the front side as the outermost coating. - 2. A mirror pane in accord with Claim I, therein characterized, in that the protective coating (16, 28) is an inorganic-organic nano-composite, gradient coating with fluoridized organic side chains.
- 3. A mirror pane in accord with Claim 1 or 2, therein characterized, in that the carrier plate is of glass.
- 4. A mirror pane in accord with Claim 1 or 2, therein characterized, in that the carrier plate is of plastic.
- A mirror pane in accord with one of the foregoing claims, therein characterized, in that the reflection coating (14) is a silver coating.
- 6. A mirror pane in accord with one of the foregoing Claims 1 to 4, therein characterized, in that the reflection coating (14) is a chromium coating.
- 7. A mirror pane in accord with one of the foregoing Claims 1 to 4, therein characterized, in that the reflection coating (14) is an aluminum coating.
Pg. 6 - 8. A mirror pane in accord with one of the foregoing Claims 1 to 4, therein characterized, in that the reflection coating is an interference coating.
- 9. A mirror pane in accord with one of the foregoing claims, therein characterized, in that the mirror pane is a front surface mirror with a reflection coating (14) applied on the front side (2), which is especially of chromium, and in that the protective coating (16) is applied on the reflection coating (14).
- 10. A mirror pane in accord with one of the foregoing claims (1 to 8), therein characterized, in that the mirror pane is a back surface mirror with a reflection coating (20), particularly of silver, applied to the back side (4), and in that the protective coating (28) on the front side (2) is applied onto a transparent carrier plate (6).
- 11. A mirror pane in accord with one of the foregoing claims, therein characterized, in that the protective coating (16, 28) covers at least the border area between the reflecting coating (14, 20) and the carrier plate (6) and also the edges (10, 12, 13).
- 12. A rearview mirror for motor vehicles, in particular commercial vehicles, with a swivelable-housing and a mirror pane advantageously pivotably held on the housing, characterized in accord with one of the foregoing claims.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19825820.8-51 | 1998-06-09 | ||
| DE19825820 | 1998-06-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2273694A1 true CA2273694A1 (en) | 1999-12-09 |
Family
ID=7870449
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2273694 Abandoned CA2273694A1 (en) | 1998-06-09 | 1999-06-08 | A mirror pane especially for rearview mirror for motor vehicles |
Country Status (4)
| Country | Link |
|---|---|
| AR (1) | AR018628A1 (en) |
| BR (1) | BR9901792A (en) |
| CA (1) | CA2273694A1 (en) |
| MX (1) | MXPA99005270A (en) |
-
1999
- 1999-06-07 MX MX9905270A patent/MXPA99005270A/en unknown
- 1999-06-08 CA CA 2273694 patent/CA2273694A1/en not_active Abandoned
- 1999-06-08 AR ARP990102694 patent/AR018628A1/en not_active Application Discontinuation
- 1999-06-08 BR BR9901792-0A patent/BR9901792A/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| MXPA99005270A (en) | 2005-04-28 |
| AR018628A1 (en) | 2001-11-28 |
| BR9901792A (en) | 1999-12-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Dead |