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US 4,578,429 AGranted
Selectively hydrogenated block copolymers modified with acid compounds or derivatives
AssigneeShell Oil Company
InventorsWilliam P. Gergen, Robert G. Lutz, Richard Gelles
Life of this patent
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Abstract
The present invention relates to a thermally stable modified selectively hydrogenated high 1,2 content block copolymer wherein at least one acid compound is grafted to the block copolymer at a secondary or tertiary carbon position.
Claims30
A functionalized selectively hydrogenated block copolymer of the formula ABA to which has been grafted an acid compound or its derivative wherein,
- (1) each A is predominantly a polymerized monoalkenyl aromatic hydrocarbon block having an average molecular weight of about 2,000 to 115,000;
- (2) each B prior to hydrogenation is predominantly a polymerized conjugated diene hydrocarbon block having an average molecular weight of about 20,000 to 450,000;
- (3) the blocks A constituting 5-95 weight percent of the copolymer;
- (4) the unsaturation of the block B is less than 10% of the original unsaturation;
- (5) the unsaturation of the A blocks is above 50% of the original unsaturation;
- (6) and substantially all of the acid compounds or their derivatives are grafted to the block copolymer at secondary or tertiary carbon positions in the B blocks;
- (7) and wherein said acid compounds and their derivatives are not easily polymerizable.
4 more elements
A functionalized selectively hydrogenated block copolymer having at least 1 A mid block and at least two B end blocks to which has been grafted an acid compound or its derivative wherein,
- (1) each A is predominantly a polymerized monoalkenyl aromatic hydrocarbon block having an average molecular weight of about 2,000 to 115,000;
- (2) each B prior to hydrogenation is predominantly a polymerized conjugated diene hydrocarbon block having an average molecular weight of about 20,000 to 450,000;
- (3) the blocks A constituting 5-95 weight percent of the copolymer;
- (4) the unsaturation of the block B is less than 10% of the original unsaturation;
- (5) the unsaturation of the A blocks is above 50% of the original unsaturation;
- (6) and substantially all of the acid compounds or their derivatives are grafted to the block copolymer at secondary or tertiary carbon positions in the B blocks.
3 more elements
Dependencies are inferred from the claim text.