Pavement marking compositions

Patent metadata

Field	Value
Publication number	US-9797097-B2
Application number	US-201214404300-A
Country	US
Kind code	B2
Filing date	Sep 28, 2012
Priority date	May 29, 2012
Publication date	Oct 24, 2017
Grant date	Oct 24, 2017

Abstract

A pavement marking composition comprises an isocyanate-containing component and an amine-containing component. At least one of the components comprises plasticizer and at least one of the components comprises filler. The composition comprises about 5 wt. % or more plasticizer and is substantially free of polyaspartic ester amines.

First claim

We claim:

1. A polyurea pavement marking composition comprising:
(a) an isocyanate-containing component; and
(b) an amine-containing component;
wherein at least one of said components comprises plasticizer and at least one of said components comprises filler,
wherein the polyurea pavement marking composition comprises about 5 wt. % or more plasticizer and is substantially free of polyaspartic ester amines,
wherein the track-free time of the polyurea pavement marking composition is less than about 360 seconds, and
wherein polyurea pavement marking composition has a Shore D hardness greater than 56 when fully cured.

2. The polyurea pavement marking composition of claim 1 , wherein the plasticizer is a phthalate.

3. The polyurea pavement marking composition of claim 1 , wherein the plasticizer is an alkylsulphonic acid phenyl ester.

4. The polyurea pavement marking composition of claim 1 , wherein the plasticizer is phthalate-free.

5. The polyurea pavement marking composition of claim 1 , wherein the composition comprises from about 5 to about 45 wt. % plasticizer.

6. The polyurea pavement marking composition of claim 5 , wherein the composition comprises from about 10 to about 35 wt. % plasticizer.

7. The polyurea pavement marking composition of claim 5 , wherein the filler is selected from the group consisting of talc, titanium dioxide, silica, zirconia, calcium carbonate, calcium magnesium carbonate, glass or ceramic microspheres and combinations thereof.

8. The polyurea pavement marking composition of claim 1 , wherein the amine-containing component comprises a sterically hindered amine.

9. The polyurea pavement marking composition of claim 8 , wherein the amine-containing component comprises polyoxyalkyleneamine.

10. The polyurea pavement marking composition of claim 1 , wherein the isocyanate-containing component comprises one or more of isocyanurate groups, uretdione groups, biuret groups, and allophonate groups.

11. The polyurea pavement marking composition of claim 1 , wherein the isocyanate-containing component comprises one or more of hexamethylene diisocyanate, cyclohexane diisocyanate, 1,12-dodecane diisocyanate, 1,4-tetramethylene diisocyanate, isophorone diisocyanate, dicyclomethane diisocyanate, m-phenylene diisocyanate, p-phenylene diisocyanate, polymethylene polyphenylisocyanate, tetraalkyl xylene diisocyanate, toluene diisocyanate, dianisidine diisocyanate, bitolylene diisocyanate, naphthalene-1,4-diisocyanate, diphenylene 4,4′-diisocyanate, xylylene-1,3-diisocyanate, bis(4-isocyanatophenyl)methane, bis(3-methyl-4-isocyanatophenyl)methane, 4,4′-diphenylpropane diisocyanate, polymeric forms thereof; and an active hydrogen containing material selected from at least one polyol, a high molecular weight polyoxyalkyleneamine or a combination thereof.

12. The polyurea pavement marking composition of claim 1 , wherein the amine-containing component comprises

or combinations thereof.

13. The polyurea pavement marking composition of claim 1 , wherein the volume ratio of the isocyanate-containing component to the amine-containing component is 1:X; wherein X is about 0.1 to about 10.

14. The polyurea pavement marking composition of claim 13 , wherein X is about 2.

15. The pavement marking composition of claim 10 , wherein the shrinkage of a pavement marking including the pavement marking composition is less than 1.5%.

16. The polyurea pavement marking composition of claim 10 , wherein the cup cure speed of the composition is about 60 seconds or longer.

17. The polyurea pavement marking composition of claim 16 wherein the cup cure speed of the composition is from about 60 to about 3600 seconds.

18. A traffic bearing surface having thereon a pavement marking including the polyurea pavement marking composition of claim 1 .

19. A pre-formed pavement marking comprising a substrate having thereon a coating of the polyurea pavement marking composition of claim 1 .

Assignees

• 3M Innovative Properties Co

Inventors

• Kugel Alexander J
• Kapfer Craig A
• Apel Cori S
• Jones Clinton L
• Prince Ryan B

Classifications

• C08K2003/2241

  Titanium dioxide · CPC title

• E01C5/20

  made of units of plastics, {e.g. concrete with plastics, linoleum}(E01C5/18 takes precedence; {of textiles made of synthetic fibres E01C5/008}) · CPC title

• C08K5/0016

  Plasticisers · CPC title

• E01F9/506

  characterised by the road surface marking material, e.g. comprising additives for improving friction or reflectivity; Methods of forming, installing or applying markings in, on or to road surfaces · CPC title

• C08G18/3234

  cycloaliphatic · CPC title