Abstract
Following the "discovery" of bitumen, a new breakthrough in the field of water-proofing was achieved with the synthesis of polyproptylene in the early 60's. The old generation Ziegler-Natta catalysis generated, as a by-product, considerable quantities of atactic polypropylene, which was used to advantage as a bitumen modifier in waterproofing applications: this was the birth of polymer-bitumen waterproofing membranes. SBS, a new modified for bitumen, was introduced in the earyly 70s. The mixtures obtained with thse two types of modifiers were good, but their performance capabilities were limited in several respects. A new frontier was opened up by the latest developments of macromolecular chemistry, which have made available a new generation of polyolefins. The waterproofing mixtures obtained with last generation polyolefins do away with the performance limits associated with the use of traditional APP znd SBS and exalt the best features of these two "old" families of plastic materials.
Following the "discovery" of bitumen, a new breakthrough in the field of water-proofing was achieved with the synthesis of polyproptylene in the early 60's. The old generation Ziegler-Natta catalysis generated, as a by-product, considerable quantities of atactic polypropylene, which was used to advantage as a bitumen modifier in waterproofing applications: this was the birth of polymer-bitumen waterproofing membranes. SBS, a new modified for bitumen, was introduced in the earyly 70s. The mixtures obtained with thse two types of modifiers were good, but their performance capabilities were limited in several respects. A new frontier was opened up by the latest developments of macromolecular chemistry, which have made available a new generation of polyolefins. The waterproofing mixtures obtained with last generation polyolefins do away with the performance limits associated with the use of traditional APP znd SBS and exalt the best features of these two "old" families of plastic materials.
Date
10/2000
10/2000
Author(s)
Alessandro Rotolo
Alessandro Rotolo
Page(s)
65-79
65-79
Keyword(s)
polyolefin; polypropylene, elasto plastomeric; APP; SBS; modified bitumen waterproofing
polyolefin; polypropylene, elasto plastomeric; APP; SBS; modified bitumen waterproofing