| 摘要 |
64693-3743D A method of sealing cracks and joints in concrete or asphalt structures is disclosed. The cracks or joints are sealed with a sealant which is an organic-terminated polysulfide polymer represented by the formulae I and II wherein n is a number from 2 to 8, 1 is zero or a positive integer, m is a positive integer, each R is independently an unsubstituted or inertly substituted organic polyradical with the radicals residing in carbon atoms, p is zero or a positive number which is the difference between the number of valence of R and 2, and each Y and Z is independently chosen from the class consisting of (vinylaryl)alkyl and other inertly substituted noncross-linking monoradicals provided that at least a portion of Z is (vinylaryl) alkyl. |
