Luminescent Resin
Paint Development

RIKEN KOGYO Inc
2019.2.21

Various Visual Guidance Countermeasures
Nowdays, various kinds of visual guidance countermeasures are implemented to show lanebranches, road ends or road shapes, along the side or at the centre of the road, in order to guidedrivers during day and night. It is not only used to recognize road shapes at night, but also as an
anticipation against visibility disturbance during snowstorm.
In addition, in snowy areas some of them serve as markers of snow removal work.

１

Visual Guidance by Luminescent Technology
Luminescence is a phenomenon that ultraviolet rays, that contained in light, are absorbed andstored as energy, and then the accumulated energy is released in the dark for a while to emit light,
and then the stored light is gradually released and attenuated, absorbs light and repeats theaccumulation of light. Currently, utilization in various places such as evacuation directions andinduction routes is increasing due to the advantage that electric energy is stored and natural light isemitted so that power supply is unnecessary.

Natural lighting, compliant with no-power environment, maintenancefree, anti-theft, workability
２Countermeasures For Visual Guidance In Overseas
The pictures below shows the visual guidance countermeasures in overseas. There are many
protective fences made of concrete, many countermeasures with coloring and reflecting body attachedto the road attached structure as seen in the pictures. However, it is not enough to be the visual
guidance at night, to ensure visibility, to support safety driving or used to be a countermeasure toprotect pedestrians at present.

Technical proposal using luminescent in toconcrete structures such as protective walls『 Luminescent resin paint 』
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Luminescent Resin Painting「 Luminescentmaterials 」＋「 High weather-resistantclear urethane resin 」＝『 Luminescentresin paint 』

Transparent status of coating film 1 mm/2 mm,
concentration of luminescent material 10%
Light emission condition of 50%
luminescent material concentration/2
mm coating film
(From the photo in left side)·Concrete· Hot galvanized steel sheet
Luminescence status by coating film sheet, at each luminescent material · PC resin
concentration and thickness· Glass(From the left, concentration 10% 1 mm thick, 10% 2 mm thick, 20% 1mm thick, 20 mm 2 mm thick)Marking by irradiation of
black light pen

４What Is Transparent High Weather
Resistance Urethane Resin
This resin is a moisture-curing polyurethane, high weather resistant coating material.

· Prevent concrete from crack/neutralization/sulphate deterioration· Prevent deterioration by freezing and thawing in cold district· Low glossiness attenuation/dye change, transparent, high weather
resistance (about 40 years equivalent)· Surface protection/reinforcement· Strong film properties (compatibility of strength and elongation)· Liquid/paste applicable and roller coating are possible

５Concrete Coating Process
Surface
Treatment

Primer
Application

Applying Luminescent
Resin Paint

６

Afterglow Test On Sheet
The results of afterglow test with the luminescent resin paint sheet are shown below.
Due to receive sunlight, although it does not match with test method of JIS Z 9107 and thelight source, evaluation was performed by refer to JIS Z 9107 and JIS Z 9095 as reference
evaluation of afterglow.
The result reached the ”Glow lower limit value such as a phosphorescent safety sign, guidance line,etc." irrespective of the content of luminescent material.

1. Materials and method· Sheet making method: pour into mold, peel off in sheet after curing· Sheet size: 11 cm × 16 cm × 1 mm / 2 mm
· Sample: Coating film thickness of luminescent material content 10% / 30% 1mm / 2 mm

Sheet afterglow time estimation result(Y axis: brightness balance, X axis: afterglow estimated time)

2. Test conditions· Light source: Always receive sunlight· Measurement frequency: measured for each sheet (N = 3)
※ Results are N = 3 average value· Estimation method: speculative measurement by luminescent meter BM-100７Afterglow Test On Concrete Coating
The results of afterglow test by luminescent resin paint that coating at concrete are shown below.
Due to receive sunlight, although it does not match with test method of JIS Z 9107 and the light source,
evaluation was performed by referring JIS Z 9107 and JIS Z 9095 as reference evaluation of afterglow.
As a result, with respect to the content of the phosphorescent material of 20% or more, ”Glow lower
limit value such as a photo phosphorescent safety sign, guidance line" has been reached.

1. Materials and method· Application method: Roller coating on concrete block surface· Coated surface: Width 150 mm × length 800 mm × Coating film
thickness about 0.3 to 0.5 mm· Sample: Apply with a luminescent material content of 10% to 50%

Concrete coating afterglow time estimation result(Y axis: brightness balance, X axis: afterglow estimated time)

2. Test conditions· Light source: Always receive sunlight· Measurement frequency: Representative portion for eachapplication surface (N = 1)
· Estimation method: speculative measurement by luminescentmeter BM-100８LED-Compatible Luminescent Resin Paint
LED compatible luminescent resin paint contains LED compatible luminescent materials, improved about 3 times inluminance and about 2 times in afterglow time compared with conventional luminescent materials. It is greatly effective
when it is applied indoors and outdoors together with the luminescent resin paint depending on the application.
「 LEDcompatibleluminescentmaterial 」＋「 High weatherresistant clear
urethane resin 」＝『 LED compatible
Luminescentresin paint 』○ Applicable objects: Concrete, glass, resin or steel materials are possible.
○Useful life time is 40 years (from the result of resin material physical property evaluation).
○ Excellent in water resistance, heat resistance, cold resistance and flexibility. (From each test result)○ Weather resistance A result has been obtained of 15 years or more. (From accelerated exposure testresults)* Similar results are obtained for luminescent resin coatings.

Coating sheet sample thickness 2 mmContent of luminescent material compatible to LED: 10%,
20%, 30%

Marking by black light
pen irradiation

Coating sheet sample
thickness 2 mm
Ordinary luminescentmaterial content: 30%※Conditions:
The irradiation timeusing the LED light bulb
is set to about the same
10 seconds for the LED
compatible luminescentmaterial and ordinary
luminescent material.

９LED-Compatible Luminescent Resin Paint- Afterglow Test by Coated Film
Following table shows results of the afterglow test using coating sheet sample of LED compatible
luminescent resin paint, with six types shown below. As a result of using the LED bulb as the lightsource and observing the decline of the luminance at the irradiation time 1 minute and 20 minutes byphotograph and visual observation, as a result of visual observation, the luminance of the evacuation
guidance lamp specified for 2 hours or more by irradiation for 20 minutes was confirmed.

１０

LED-Compatible Luminescent Resin Paint【Usage: Indoors People Guidance】

JR platform, emergency shelter

By applying to stairs
Prevent trampling and position
marking during darkness

Guide lamp by application to LED
fluorescent tube

Position indication byapplying to a handrail

Wallpaper application by black light pen
Used as message board

Position indication byapplication to door knob

Position indication
by application tokeyhole

１１LED-Compatible Luminescent Resin Paint【Usage: Vehicle/Ship Outdoor Guidance】

Parking lot line
Gaze guidance by applying toguardrail

Utilization of luminance (afterglow) by application todelineator resin cover

White line on road

Gaze guidance by applying toprotective wall

Application to ship mooring
block

Position indication byapplication to road curb etc
１２

LED-Compatible Luminescent Resin Paint【Usage: Warning Alerts, etc】

Mobile cover

Electric pole

Kanban/sign board

Outer wall logo (companyname)Lid-free road andagricultural groove

Fall prevention fence (road, river, port)
１３

LED-Compatible Luminescent Resin Paint【Other Effects Except of Light Emission by Coating】

Prevent concrete deterioration

Prevent rubber crack

Prevent steel corrosion

UV cut by glass coating

Prevent resin degradation by UV
１４

Maintenance Management by LED-Compatible Luminescent
Resin Paint And Application To Inspection/Testing Field
The Ministry of Land, Infrastructure, Transportation and Tourism has been promoting “Boosts to thedisappearance of utility poles” since 1986, and the “Act of boosts to the disappearance of utility poles” came into
effective in December, 2008, and construction is currently being carried out by each local government . In theconstruction of “Boosts to the disappearance of utility poles”, the burial of underground such as various cable pipes
will increase, so maintenance and inspection work may increase. Inspection and inspection work done inunderground water supply and sewerage systems, pressure vessel interior, tunnel seam joints, etc. is also
indispensable in the future infrastructure development due to aging and is expected to increase. LED-compatible
luminescent resin paint response to LED or black light are significant and because of its high brightness, we canexpect great effect on maintenance and inspection by applying at place as shown in the pictures below.

"Promote boosts to the disappearance ofutility poles"
Object: CCVP pipe
(Power cable protection tube) (Orange)
Object: ECVP pipe
(General PVC pipe) (grey)

Maintenance and inspection ofwater supply and sewer pipes inbuildings
Object: PVC pipe, steel pipe

Alternative test method topenetrant test
Object: steel pipe

Pipe visual inspection indark place
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