Phosphorescent highway paint composition
OwnerIrving Andersinventor
Life of this patent
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Abstract
The present invention relates to novel compositions useful, for example, in water-based paints. The compositions contain a moisture sensitive luminescent substance (for example a phosphorescent substance having increased brightness and longer lasting afterglow) and a polyurethane resin which is water miscible or soluble, and which imparts moisture stability to the luminescent substance. As a result, this novel composition when used in, for example, water-based highway paints imparts an extended road surface life, and is environmentally friendly because it does not contaminate the surrounding environment with organic hydrocarbon products via vaporization or runoffs. In addition this paint composition may be used both indoors and outdoors for nighttime marking.
Claims14
A luminescent composition comprising:
- a luminescent substance comprising a compound expressed by the matrix MAl.sub.2 O.sub.4 in which M is at least one metal element selected from the group consisting of calcium, strontium and barium or alternatively, is a matrix MAl.sub.2 O.sub.4 in which M is a plurality of metal elements comprised of magnesium and at least one element selected from the group consisting of calcium, strontium and barium;
- and a water miscible polyurethane resin.
A luminescent paint composition comprising:
- a luminescent substance comprising a compound expressed by the matrix MAl.sub.2 O.sub.4 in which M is at least one metal element selected from the group consisting of calcium, strontium and barium or alternatively, is a matrix MAl.sub.2 O.sub.4 in which M is a plurality of metal elements comprised of magnesium and at least one element selected from the group consisting of calcium, strontium and barium;
- a water miscible polyurethane resin;
- and a water-based colored paint dispersion.
A method of producing a water miscible luminescent composition which comprises, admixing a luminescent substance expressed by the matrix MAl.sub.2 O.sub.4 in which M is at least one metal element selected from the group consisting of calcium, strontium and barium or alternatively, is a matrix MAl.sub.2 O.sub.4 in which M is a plurality of metal elements comprised of magnesium and at least one element selected from the group consisting of calcium, strontium and barium;
- with a water miscible polyurethane resin.
A method of producing a water miscible luminescent paint composition which comprises admixing a luminescent substance expressed by the matrix MAl.sub.2 O.sub.4 in which M is at least one metal element selected from the group consisting of calcium, strontium and barium or alternatively, is a matrix MAl.sub.2 O.sub.4 in which M is a plurality of metal elements comprised of magnesium and at least one element selected from the group consisting of calcium, strontium and barium;
- with a water miscible polyurethane resin to form a water miscible luminescent composition;
- and admixing the water miscible luminescent composition with a water-based paint composition.
Dependencies are inferred from the claim text.