Stock material or miscellaneous articles – Web or sheet containing structurally defined element or... – Adhesive outermost layer
Reexamination Certificate
2005-03-01
2005-03-01
Zirker, Daniel (Department: 1771)
Stock material or miscellaneous articles
Web or sheet containing structurally defined element or...
Adhesive outermost layer
C404S014000, C404S020000, C428S343000, C428S356000, C428S354000, C428S3550BL
Reexamination Certificate
active
06861141
ABSTRACT:
A pavement marking article that has an adhesive composition for adhering the article to a pavement substrate, where the adhesive composition includes a reaction product of an acrylic acid ester of a monohydric alcohol whose homopolymer has a Tg less than 0° C., a non-polar ethylenically unsaturated monomer, and 0-10 parts by weight of a polar ethylenically unsaturated monomer. Preferably the amount of the acrylic acid ester is about 60-90 parts by weight, and the amount of the non-polar ethylenically unsaturated monomer is about 10-40 parts by weight.Also, a raised pavement marker that comprises:(a) a pavement marker body having upper and lower surfaces and an apparent flexural modulus of at least about 50,000 psi and(b) a pressure sensitive adhesive layer disposed upon the lower surface of the marker, wherein the adhesive has:(i) a transition region that begins at a frequency of about 10,000 radians/s or more and extends to a frequency of about 100 radians/s or less at about 25° C.; and(ii) a minimum shear modulus of about 1×105 Pa at an impact frequency of about 100 radians/s at 25° C.; and(iii) a shear modulus value of about 2×104 to 2×105 Pa at a frequency of 1 rad/sec at 25° C.Raised pavement markers that use a pressure sensitive adhesive meeting parameters (i)-(iii) can demonstrate good adhesion to roadways and are capable of withstanding repeated impacts from motor vehicle tires.
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JD Ferry, Viscoelastic Properties of Polymers, 2d Ed., pp. 292-319.
Bennett Greggory S.
Buccellato Gina M.
Khieu Sithya S.
Miron Gary R.
Thakkar Bimal V.
Fischer Carolyn A.
Zirker Daniel
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