Method for marking sites

1. Method for determining changes of a site, comprising:

a) treating the site with a composition; and

b) exposing the site thus treated and/or the untreated areas adjacent thereto to UV light; and

determining the deviation

b1) of the light intensity of the emitted light of a partial area of the site from the mean light intensity of the emitted light of the site area and/or

b2) the light intensity of the emitted light of a part of the adjacent, untreated area from the mean light intensity of the emitted light of the adjacent untreated areas and/or

b3) the light intensity of the emitted light of the site immediately after the treatment with the composition from the light intensity of the emitted light at a later time and/or

b4) the light intensity of the emitted light of the adjacent untreated area immediately after the treatment of the site with the composition from the light intensity of the emitted light of the adjacent, untreated area at a later time

wherein the composition is an aqueous dispersion comprising:

a1) at least one binder

a2) at least one substance emitting visible light on UV exposure and

a3) optionally a dispersant,

wherein the composition comprises a polyurethane as the binder of the componet a1) and said polyurethane is obtained by reaction with component i)–iv):

i) diisocyanates containing 4 to 50 carbon atoms

ii) diols having a molecular weight of 500 to 4 000 g/mol

iii) diols as chain extenders having a molecular weight of 62 to 500 g/mol

iv) mono- and polyols and/or mono- and polyamines having primary and/or secondary amino groups, which also have a group having a hydrophilizing effect.

2. Method according to claim 1 , characterized in that polyvinyl alcohol is used as dispersant of the component a3).

3. Method according to claim 1 , characterized in that the ingredient a1) and/or a3) of the composition is biodegradable.

4. Method according to claim 1 , characterized in that the polyurethane is obtained by reaction of:

i) diisocyanates containing 4 to 50 carbon atoms

ii) polyesterdiols having a molecular weight of 500 to 4 000 g/mol

iii) diols as chain extenders having a molecular weight of 62 to 500 g/mol

iv) mono- and polyols and/or mono- and polyamines having primary and/or secondary amino groups, which also have a group having a hydrophilizing effect.

5. Method according to claim 1 , characterized in that the substance a2) emitting visible light on UV exposure is an optical brightener and member of the group consisting of polystyrylstilbenes, flavonic acid derivatives, coumarins or pyrazolines.

6. Method according to claim 1 , characterized in that the substance a2) emitting visible light on UV exposure is a flavonic acid derivative of the formula (VI)

in which

R 10 , R 11 and R 12 , independently of one another, denote phenoxy, mono- or disulphonated phenoxy, phenylamino, mono- or disulphonated phenylamino, phenylamino substituted by C 1 –C 3 -alkyl, cyano, halogen, COOR, CONH—R, —NH—COR, SO 2 NH—R, O—R, morpholino, piperidino, pyrrolidino, —O—C 1 –C 4 -alkyl, —NH(C 1 –C 4 -alkyl), —NH(C 1 –C 4 -alkyl) 2 , —NH—C 2 –C 4 -alkylene-O—C 2 –C 4 -alkylene-OR, —NH(C 2 –C 4 -hydroxyalkyl) 2 , —NHC 2 –C 4 -akylene-=—C 2 –C 4 -alkylene-OR, an amino acid or an amino acid amide, from the amino group of which a hydrogen atom was removed; —NHCH 2 CH 2 OH, —N(CH 2 CH 2 OH) 2 , —N(CH) 3 CH 2 CH 2 OH, —NH 2 , —CH 3 , —S—C 1 –C 4 -alkyl, —S-aryl, —Cl, —NHCH 2 CH 2 SO 3 H, —NH(CH 2 CH 2 SO 3 H) 2 , —N(CH 2 CH 2 OH)CH 2 CH 2 —CONH 2 , in which R represents H or C 1 –C 3 -alkyl and M has the meaning described above.

7. Method according to claim 1 , characterized in that the substance a2) emitting visible light on UV exposure is a flavonic acid derivative of the formula (VII)

in which

R 13 and R 14 , independently of one another, denote hydrogen, phenyl, monosulphonated phenyl, methyl, ethyl, propyl, methoxy or ethoxy.

8. Method according to claim 1 , characterized in that the substance a2) emitting visible light on UV exposure is a fluorescent dye.

9. Method according to claim 1 , characterized in that the treatment of the site with the composition is effected by spraying or atomizing.

10. Method for determining changes of a site, comprising:

a) treating the site with a composition;

b) exposing the site thus treated and/or the untreated areas adjacent thereto to UV light; and

c) determining the deviation of the light intensity of the emitted light of the site immediately after the treatment with the composition from the light intensity of the emitted light of the site at a later time,

wherein the composition is an aqueous dispersion comprising:

a1) at least one binder,

a2) at least one substance emitting visible light on UV exposure and

a3) optionally a dispersant,

wherein the composition comprises a polyurethane as the binder of the component a1) and said polyurethane is obtained by reaction with component i)–iv):

i) diisocyanates containing 4 to 50 carbon atoms

ii) diols having a molecular weight of 500 to 4 000 g/mol

iii) diols as chain extenders having a molecular weight of 62 to 500 g/mol

iv) mono- and polyols and/or mono- and polyamines having primary and/or secondary amino groups, which also have a group having a hydrophilizing effect.

11. Method for determining changes of a site, comprising:

a) treating the site with a composition;

b) exposing the site thus treated and/or the untreated areas adjacent thereto to UV light; arid

c) determining the deviation of the light intensity of the emitted light of the site immediately after the treatment with the composition from the light intensity of the emitted light of the site at a later time

wherein the composition is an aqueous dispersion comprising:

a1) at least one binder,

a2) at least one substance emitting visible light on UV exposure and

a3) optionally a dispersant,

wherein said substance a2) emitting visible light on UV exposure is a flavonic acid derivative of the formula (VI)

in which

R 10 , R 11 and R 12 , independently of one another, denote phenoxy, mono- or disulphonated phenoxy, phenylamino, mono- or disulphonated phenylamino, phenylamino substituted by C 1 –C 3 -alkyl, cyano, halogen, COOR, CONH—R, —NH—COR SO 2 NH—R, O—R, morpholino, piperidino, pyrrolidino, —O—C 1 –C 4 -alkyl, —NH(C 1 –C 4 -alkyl), —NH(C 1 –C 4 -alkyl) 2 , —NH—C 2 –C 4 -alkylene-O—C 2 –C 4 -alkylene-OR, —NH(C 2 –C 4 -hydroxyalkyl) 2 , —NHC 2 –C 4 -akylene-=—C 2 –C 4 -alkylene-OR, an amino acid or an amino acid amide, from the amino group of which a hydrogen atom was removed; —NHCH 2 CH 2 OH, —N(CH 2 CH 2 OH) 2 , —N(CH) 3 CH 2 CH 2 OH, —NH 2 , —CH 3 , —S—C 1 –C 4 -alkyl, —S-aryl, —Cl, —NHCH 2 CH 2 SO 3 H, —NH(CH 2 CH 2 SO 3 H) 2 , —N(CH 2 CH 2 OH)CH 2 CH 2 CONH 2 , in

which 13 represents H or C 1 –C 3 -alkyl and M has the meaning described above, or

the substance a2) emitting visible light on UV exposure is a flavonic acid derivative of the formula (VII)

in which

R 13 and R 14 , independently of one another, denote hydrogen, phenyl, monosulphonated phenyl, methyl, ethyl, propyl, methoxy or ethoxy.

12. An aqueous dispersion comprising:

a1) at least one binder,

a2) at least one substance emitting visible light on UV exposure and

a3) optionally a dispersant,

wherein the composition comprises a polyurethane as the binder of the component a1) and said polyurethane is obtained by reaction with component i)–iv):

i) diisocyanates containing 4 to 50 carbon atoms

ii) diols having a molecular weight of 500 to 4 000 g/mol

iii) diols as chain extenders having a molecular weight of 62 to 500 g/mol

iv) mono- and polyols and/or mono- and polyamines having primary and/or secondary amino groups, which also have a group having a hydrophilizing effect.

13. The aqueous dispersion according to claim 12 , wherein polyvinyl alcohols is used as the dispersant of the component a3).

14. The aqueous dispersion according to claim 12 , wherein a1) and/or a3) of the composition is biodegradable.

15. The aqueous dispersion according to claim 12 , wherein the polyurethane is obtained by reaction with component i)–iv):

i) diisocyanates containing 4 to 50 carbon atoms

ii) diols having a molecular weight of 500 to 4 000 g/mol

iii) diols as chain extenders having a molecular weight of 62 to 500 g/mol

iv) mono- and polyols and/or mono- and polyamines having primary and/or secondary amino groups, which also have a group having a hydrophilizing effect.

16. The aqueous dispersion according to claim 12 , wherein the substance a2) emitting visible light on UV exposure is an optical brightener and member of the group consisting of polystyrylstilbenes, flavonic acid derivatives, coumarins or pyrazolines.

17. The aqueous dispersion according to claim 12 , said substance a2) emitting visible light on UV exposure is a flavonic acid derivative of the formula (VI)

in which

R 10 , R 11 and R 12 , independently of one another, denote phenoxy, mono- or disulphonated phenoxy, phenylamino, mono- or disulphonated phenylamino, phenylamino substituted by C 1 –C 3 -alkyl, cyano, halogen, COOR, CONH—R, —NH—COR, SO 2 NH—R, O—R, morpholino, piperidino, pyrrolidino, —O—C 1 –C 4 -alkyl, —NH(C 1 –C 4 -alkyl), —NH(C 1 –C 4 -alkyl) 2 , —NH—C 2 –C 4 -alkylene-O—C 2 –C 4 -alkylene-OR, —NH(C 2 –C 4 -hydroxyalkyl) 2 , —NHC 2 –C 4 -akylene-=—C 2 –C 4 -alkylene-OR, an amino acid or an amino acid amide, from the amino group of which a hydrogen atom was removed; —NHCH 2 CH 2 OH, —N(CH 2 CH 2 OH) 2 , —N(CH) 3 CH 2 CH 2 OH, —NH 2 , —CH 3 , —S—C 1 –C 4 -alkyl, —S-aryl, —Cl, —NHCH 2 CH 2 SO 3 H, —NH(CH 2 CH 2 SO 3 H) 2 , —N(CH 2 CH 2 OH)CH 2 CH 2 CONH 2 , in which R represents H or C 1 –C 3 -alkyl and M has the meaning described above, or

the substance a2) emitting visible light on UV exposure is a flavonic acid derivative of the formula (VII)

in which

R 13 and R 14 , independently of one another, denote hydrogen, phenyl, monosulphonated phenyl, methyl, ethyl, propyl, methoxy or ethoxy.

18. The aqueous dispersion according to claim 12 , wherein the substance a2) emitting visible light on UV exposure is a fluorescent dye.

19. The aqueous dispersion according to claim 12 , wherein the treatment of the site with the composition is effected by spraying or atomizing.