Abstract:
A non-carboxylated styrene-butadiene copolymer, preparation method and use thereof are provided. The non-carboxylated styrene-butadiene copolymer is prepared by hot polymerization in the absence of acid monomers and is used in asphalt-based systems such as asphalt emulsions.
Abstract:
Styrene-based copolymers having acid monomer units, dispersions, preparation method and use thereof are provided. The styrene-based copolymer is prepared by polymerizing styrene, one or more acid monomers, and optionally butadiene at a temperature of 40°C or greater and then is vulcanized. The obtained styrene-based copolymer is used in asphalt-based systems.
Abstract:
Disclosed herein are latex compositions and asphalt formulations comprising the latex compositions. In some embodiments, the latex compositions include a styrene-butadiene copolymer and polyphosphoric acid represented by the formula, Hn+2PnO3n+1, wherein n is an integer from 2 to 30. The latex composition can be used to prepare polymer-modified asphalt emulsions and hot mix asphalt compositions. The asphalt formulations can be prepared by contacting asphalt with a latex composition as described herein and a sulfur curing agent. Methods of coating a surface comprising applying an asphalt formulation as described herein to the surface are also disclosed.