| 摘要 |
1532543 Road surface marking L EIGENMANN 22 Jan 1976 [24 Jan 1975] 02472/76 Heading C3N [Also in Division E1] A primer layer for road surface marking tape comprises a composition which when spread in the molten condition on a road surface rapidly attains a viscosity of 10<SP>3</SP>-10<SP>4</SP> cP and attains within a time not longer than 30 seconds thereafter a viscosity of at least 10<SP>5</SP> cP. The composition may include wetting additives having amidic, sulphonic, hydroxy, epoxy or isocyanic radicals, and typically comprises a mixture of pitch, styrene-butadiene resin, epoxy tar, coumarone resin, phenolic colophony resin, oxidized bitumen and bitumen 40/50. |
