Elastomeric compositions from asphalt and partially uncured urethanes of allylic hydroxyl-terminated diene polymers

Abstract

Abstract COMPOSITIONS CONTAINING ASPHALT AND URETHANE WHICH IS THE REACTION PRODUCT OF A DISOCYANATE WITH AN INTERMEDIATE POLYHYDROXY POLYMER HAVING AN AVERAGE OF AT LEAST ABOUT 1.8 PREDOMINANTLY PRIMARY, TERMINAL, ALLYLIC HYDROXYL GROUPS PER MOLECULE AND BEING AN ADDITION POLYMER OF 0-75% BY WEIGHT OF AN ALPHA-OLEFINIC MONOMER OF 2 TO 12 CARBON ATOMS, AND ABOUT 25 TO 100% OF A 1,3-DIENE HYDROCARBON OF 4 TO ABOUT 12 CARBON ATOMS, THE INTERMEDIATE POLYHYDROXY POLYMER HAVING A VISCOSITY AT 30*C. OF ABOUT 5-20,000 POISES AND A NUMBER AVERAGE MOLECULAR WEIGHT OF ABOUT 400-25,000. THE URETHANE COMPONENT IS AT LEAST PARTIALLY UNCURED WHEN COMBINED WITH THE ASPHALT. THESE RUBBERIZED ASPHALT COMPOSITIONS ARE EASILY WORKED AND CAN BE USED ALONE FOR PATCHING, CRACKFILLING AND WEATHERPROOF COATINGS, OR CAN BE MIXED WITH OTHER MATERIALS, SUCH AS GRANULAR, INORGANIC, OFTEN SILICEOUS MATERIALS AND WITH CONVENTIONAL PAVING AGGREGATES TO MAKE PAVING COMPOSITIONS. THE MATERIAL SETS UP TO AN ELASTOMERIC COMPOSITION AFTER THE PAVING COMPOSITION IS APPLIED TO THE ROAD SURFACE. THESE COMPOSITIONS POSSESS IMPROVED LOW TEMPERATURE FLEXIBILITY, IMPROVED ADHESION, HIGH ABRASION RESISTANCE, DECREASED TACK AND LITTLE TENDENCY TO BLEED AT ELEVATED TEMPERATURES.

Inventors

• 👤 Joseph A Verdol
• 👤 Patrick W Ryan

Bibliographic Details