Patent ID: 6861141

Claim:
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.; (ii) a minimum shear modulus of about 1×10 5 Pa at an impact frequency of about 100 radians/s at 25° C.; and (iii) a shear modulus value of about 1×10 4 to 2×10 5 Pa at a frequency of 1 rad/sec at 25° C.; and the adhesive composition comprises about 40 to 60 wt-% polybutadiene and about 40 to 60 wt-% tackifier.