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Water-curable, silane modified chlorosulfonated olefinic polymers and a process for the preparation thereof
| Details |
Inventors: Rifi, Mahmoud R.;
Assignee: Union Carbide Corporation (Danbury, CT)
Primary Examiner: Briggs, Sr.; Wilbert J.
Assistant Examiner:
Attorney, Agent or Firm: Arvantes; James C., Brown; Robert C.
Water-curable, silane modified chlorosulfonated olefinic polymers, particularly desirable for use as coverings about wires and cables, produced by reacting a mixture containing a chlorosulfonated olefinic polymer and a hydrolyzable silane having cyclic oxygen, sulfur or nitrogen functionality. |
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DETAILED DESCRIPTION OF THE INVENTION The present invention provides for water-curable, silane modified chlorosulfonated olefinic polymers, produced by reacting a mixture containing a chlorosulfonated olefinic polymer and a hydrolyzable silane having cyclic oxygen, cyclic sulfur or cyclic nitrogen functionality.
The water-curable, silane modified chloro-sulfonated olefinic polymers of this invention can be cured by moisture in a relatively short period of time, to crosslinked products free of undesirable scorch.
The crosslinked products so produced are characterized by the properties previously discussed in reference to chlorosulfonated olefinic polymers and find utility in applications also previously discussed.
The reaction between a chlorosulfonated olefinic polymer and a silane having cyclic oxygen, sulfur or nitrogen functionality can be depicted as follows: ##STR1## As can be seen, no undesirable byproducts, such as HCl which could cause scorching, ae formed.
Illustrative of suitable silanes, for purposes of this invention, have the general formula: ##STR2## wherein X is oxygen, sulfur or nitrogen; R is a hydrocarbon radical or oxy substituted hydrocarbon radical; each V, which can be the same or different, is hydrogen, a hydrocarbon radical or a hydrolyzable group; Z is a hydrolyzable group; n is an integer having a value of one to 18 inclusive; d is an integer having a value of zero or 1, and R.
sup.
1 is hydrogen or a hydrocarbon radical.
Exemplary of suitable radicals for R are alkylene radicals having one to 18 carbon atoms inclusive, preferably one to 6 carbon atoms inclusive, such as methylene, ethylene, propylene, butylene, hexylene and the like; alkoxy radicals having one to 18 carbon atoms inclusive, preferably one to 6 carbon atoms inclusive such as methyloxymethyl, methyloxypropyl, ethyloxyethyl, ethyloxypropyl, propyloxypropyl, propyloxybutyl, propyloxyhexyl and the like.
R.
sup.
1 is a hydrocarbon radical, preferably an alkyl radical having a maximum of 4 carbon atoms as specifically identified for V below or phenyl
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