Polyisobutylene polymers having acrylic functionality
AssigneeDow Corning Corporation
InventorsAnil Kumar Saxena, Toshio Suzuki
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Abstract
The present invention relates to a method for preparing an acrylic-functional polyisobutylene polymer or copolymer, said method comprising reacting a polyisobutylene polymer or copolymer which contains at least one carbon-bonded silanol group in its molecule with a silane having both an acrylic-containing group and a silicon-bonded hydrolyzable group in its molecule.
Claims23
A method for preparing an acrylic-functional polyisobutylene polymer in which at least 50 mole percent of the repeat units are isobutylene units, said method comprising reacting
- (A) a polyisobutylene polymer in which at least 50 mole percent of the repeat units are isobutylene units and which contains at least one carbon-bonded silanol group in its molecule;
- and
- (B) a silane of the formula ##STR5## wherein R is independently selected from the group consisting of hydrocarbon groups having 1 to 14 carbon atoms and halogenated hydrocarbon groups having 1 to 10 carbon atoms, X is a hydrolyzable group, G is an alkylene oxide group having 1 to 4 carbon atoms and L is selected from the group consisting of hydrogen and an alkyl radical having 1 to 4 carbon atoms.
An acrylic-functional polyisobutylene polymer prepared by reacting
- (A) a polyisobutylene polymer in which at least 50 mole percent of the repeat units are isobutylene units and which contains at least one carbon-bonded silanol group in its molecule;
- and
- (B) a silane of the formula ##STR6## wherein R is independently selected from the group consisting of hydrocarbon groups having 1 to 14 carbon atoms and halogenated hydrocarbon groups having 1 to 10 carbon atoms, X is a hydrolyzable group, G is an alkylene oxide group having 1 to 4 carbon atoms and L is selected from the group consisting of hydrogen and an alkyl radical having 1 to 4 carbon atoms.
An acrylic-functional polyisobutylene polymer in which at least 50 mole percent of the repeat units are isobutylene units and having in its molecule at least one group of the formula (i)
- --R.sub.(3-n) Si{OR.sub.2 Si--G--C(O)C(L).dbd.CH.sub.2 }.sub.n(i)
- wherein R is independently selected from the group consisting of a hydrocarbon group having 1 to 14 carbon atoms and a halogenated hydrocarbon group having 1 to 10 carbon atoms, G is an alkylene oxide group having 1 to 4 carbon atoms, L is selected from the group consisting of hydrogen and an alkyl radical having 1 to 4 carbon atoms and n is 1 or 2.
Dependencies are inferred from the claim text.