Isobutylene-triene copolymers cross-linkable under ambient humidity conditions, a process for their preparation, and intermediate suitable for this purpose
AssigneesAnic S.p.A., Dow Corning Corporation
InventorsAlberto Greco, Guglielmo Bertolini, Omero Zavattini
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Abstract
Isobutylene copolymers, cross-linkable under ambient humidity conditions, characterized by the presence of pendant functions containing a silyl radical, are prepared by a process comprising the preliminary formation of new copolymers of isobutylene with a triene containing a system of two conjugate double bonds in position 1,3 and at least one other double bond of vinyl type, followed by the silylation of the polymers thus produced by means of a silicon derivative chosen from those of formula (I) or (II): ##STR1##
Claims21
Copolymers of isobutylene and at least one triene selected from the group consisting of 1,3,7-octatriene, 5-methyl-1,3,6-heptatriene, hexatriene, dicyclopentadiene and allylcyclopentadiene, of molecular weight variable between 1000 and 1,000,000 and cross-linkable under ambient humidity conditions, characterised by the presence of pendant functions of type ##STR14## where R is a monovalent hydrocarbon radical of 1 to 10 carbon atoms, X is halogen or an alkoxy, phenoxy, thioalkoxy, acyloxy, amino, aminoxy, oxime or silanoxy radical, and a is 0, 1 or 2 wherein the silicon atoms are bonded to the copolymer through reaction with the non-terminal double bond or the vinyl bond on said triene.
Copolymers of isobutylene and at least one triene, selected from the group of consisting of 1,3,7-octatriene, 5-methyl-1,3,6-heptatriene, hexatriene, dicyclopentadiene and allylcyclopentadiene of molecular weight variable between 1000 and 1,000,000 and cross-linkable under ambient humidity conditions, characterised by the presence of pendant functions of type
- R'.sub.n X.sub.3n --Si--R--S--
- where R is a bivalent hydrocarbon radical of 3 to 10 carbon atoms R' is a monovalent hydrocarbon radical of 1 to 10 carbon atoms X is halogen, or an alkoxy, alkoxyalkoxy, thioalkoxy, acyloxy, amino, aminoxy, oxime or amide radical n can be zero, 1 or 2 wherein the --S-- is linked to a double bond on said triene.
Dependencies are inferred from the claim text.