Novel road markings for assisting the perception of the surroundings of vehicles

Patent metadata

Field	Value
Publication number	US-2016017151-A1
Application number	US-201414774054-A
Country	US
Kind code	A1
Filing date	Mar 13, 2014
Priority date	Apr 8, 2013
Publication date	Jan 21, 2016
Grant date	—

Abstract

The present invention encompasses an innovative concept for the marking of trafficways, more particularly roads. The application qualities and lifetime of these new markings are comparable with those of the prior art. The markings also possess properties comparable with those of the prior art in respect of night visibility, back-in-service time, and surface quality. An additional contribution of the markings of the present invention, however, is that they can be used to support modern driver assistance systems and autonomous driving. With this in mind, the present invention relates more particularly to road markings which, building on established systems, are equipped with additional reflection capacity for electromagnetic radiation, more particular for microwaves and/or infrared radiation.

First claim

1 . A radiation-reflecting road marking comprising:
spherical metal particles having a diameter d of between x*0.7*λ/π and x*1.3*λ/π and/or cylindrical metal particles having a length/width ratio between 2 and 100 and a length 1 between y*λ/1.8 and y*λ/3, λ being the wavelength of the radiation to be reflected, x being an integer between 1 and 6 and y being an integer between 1 and 20.

2 . The radiation-reflecting road marking according to claim 1 ,
wherein the metal particles are particles consisting wholly or partly of aluminium, iron, magnesium or zinc or of an alloy predominantly containing aluminium, iron, magnesium or zinc.

3 . The radiation-reflecting road marking according to claim 1 ,
wherein the metal particles consist wholly of the metal, the surface is coated with the metal, or the metal is coated with glass, PMMA or polycarbonate.

4 . The radiation-reflecting road marking according to claim 1 ,
wherein the cylindrical metal particles have a length/width ratio between 5 and 20 and y is an integer between 1 and 4.

5 . The radiation-reflecting road marking according to claim 1 ,
wherein the matrix material of the road marking comprises an adhesion promoter and/or the metal particles are provided on the surface with an adhesion promoter, and wherein the adhesion promoter is at least one adhesion promoter selected from the group of silanes, hydroxyesters, aminoesters, urethanes, isocyanates and/or acids copolymerizable with (meth)acrylates.

6 . The radiation-reflecting road marking according to claim 1 ,
wherein the road marking is a prefabricated adhesive tape or a water-based paint.

7 . The radiation-reflecting road marking according to claim 1 ,
wherein the road marking is a cold plastic.

8 . The radiation-reflecting road marking according to claim 1 ,
wherein the road marking additionally has glass beads on the surface.

9 . The radiation-reflecting road marking according to claim 1 ,
wherein the metal particles are situated on the surface of the road marking.

10 . The radiation-reflecting road marking according to claim 7 ,
wherein the cold plastic has been produced from a two-part reactive resin in which one component comprises 1.0 to 5.0 wt % of an initiator, preferably dilauroyl peroxide and/or dibenzoyl peroxide, and the other component comprises 0.5 to 5.0 wt % of an accelerator, preferably a tertiary, aromatically substituted amine, and in that the reactive resin in total further comprises: 0.1 wt % to 18 wt % of crosslinkers, 2 wt % to 50 wt % of monomers, 0 wt % to 12 wt % of urethane (meth)acrylates, 0.5 wt % to 30 wt % of prepolymers, 0 wt % to 15 wt % of core-shell particles, 7 wt % to 15 wt % of an inorganic pigment, preferably titanium dioxide, 30 wt % to 60 wt % of mineral fillers, and optionally further auxiliaries.

11 . The radiation-reflecting road marking according to claim 1 ,
wherein the frequency of the electromagnetic radiation to be reflected lies between 20 and 130 GHz.

12 . The radiation-reflecting road marking according to claim 11 , wherein the frequency lies between 76 and 81 GHz.

13 . The radiation-reflecting road marking according to claim 1 ,
wherein only regions of the road marking are provided with the metal particles.

14 . The radiation-reflecting road marking according to claim 13 , wherein by equipping regions of the road marking, these are provided with readable information.

15 . A method for producing a road marking according to claim 7 , wherein, where necessary, two-part systems are mixed, the mixture is applied to the road surface and the metal particles and optionally glass beads are added during or directly after the application of the cold plastic to the trafficway surface.

16 . A composition comprising:
spherical metal particles having a diameter d of between x*0.7*λ/π and x*1.3*λ/π and/or cylindrical metal particles having a length/width ratio between 2 and 100 and a length 1 between y*λ/1.8 and y*λ/3, λ being the wavelength of the radiation to be reflected, x being an integer between 1 and 6 and y being an integer between 1 and 20.

17 . The composition of claim 16 that is not cured.

18 . The composition of claim 16 that has been cured.

19 . A system comprising the composition of claim 16 in a form that reflects radiation, a radar emitter and sensor.

Assignees

• Protzmann Guido
• Kiwitt Jörn
• Kiefer Dominik
• Schmitt Günter
• Kaufmann Marita
• Olapoju Michael
• Evonik Roehm Gmbh

Inventors

• Protzmann Guido
• Kiwitt Joern
• Kiefer Dominik
• Schmitt Guenter
• Kaufmann Marita
• Olapoju Michael

Classifications

• C08K7/00

  Use of ingredients characterised by shape · CPC title

• C08K2003/0893

  Zinc · CPC title

• C08K2003/0812

  Aluminium · CPC title

• C08K3/08

  Metals · CPC title

• C09J11/04

  inorganic · CPC title